Download or read book Low Cost High Capacity Regenerable Sorbent for Carbon Dioxide Capture from Existing Coal fired Power Plants written by and published by . This book was released on 2016 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this project TDA Research, Inc (TDA) has developed a new post combustion carbon capture technology based on a vacuum swing adsorption system that uses a steam purge and demonstrated its technical feasibility and economic viability in laboratory-scale tests and tests in actual coal derived flue gas. TDA uses an advanced physical adsorbent to selectively remove CO2 from the flue gas. The sorbent exhibits a much higher affinity for CO2 than N2, H2O or O2, enabling effective CO2 separation from the flue gas. We also carried out a detailed process design and analysis of the new system as part of both sub-critical and super-critical pulverized coal fired power plants. The new technology uses a low cost, high capacity adsorbent that selectively removes CO2 in the presence of moisture at the flue gas temperature without a need for significant cooling of the flue gas or moisture removal. The sorbent is based on a TDA proprietary mesoporous carbon that consists of surface functionalized groups that remove CO2 via physical adsorption. The high surface area and favorable porosity of the sorbent also provides a unique platform to introduce additional functionality, such as active groups to remove trace metals (e.g., Hg, As). In collaboration with the Advanced Power and Energy Program of the University of California, Irvine (UCI), TDA developed system simulation models using Aspen PlusTM simulation software to assess the economic viability of TDA's VSA-based post-combustion carbon capture technology. The levelized cost of electricity including the TS & M costs for CO2 is calculated as $116.71/MWh and $113.76/MWh for TDA system integrated with sub-critical and super-critical pulverized coal fired power plants; much lower than the $153.03/MWhand $147.44/MWh calculated for the corresponding amine based systems. The cost of CO2 captured for TDA's VSA based system is $38.90 and $39.71 per tonne compared to $65.46 and $66.56 per tonne for amine based system on 2011 $ basis, providing 40% lower cost of CO2 captured. In this analysis we have used a sorbent life of 4 years. If a longer sorbent life can be maintained (which is not unreasonable for fixed bed commercial PSA systems), this would lower the cost of CO2 captured by $0.05 per tonne (e.g., to $38.85 and $39.66 per tonne at 5 years sorbent replacement). These system analysis results suggest that TDA's VSA-based post-combustion capture technology can substantially improve the power plant's thermal performance while achieving near zero emissions, including greater than 90% carbon capture. The higher net plant efficiency and lower capital and operating costs results in a substantial reduction in the cost of carbon capture and cost of electricity for the power plant equipped with TDA's technology.

Download or read book Carbon Dioxide Capture from Flue Gas Using Dry Regenerable Sorbents written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Regenerable sorbents based on sodium carbonate (Na2CO3) can be used to separate carbon dioxide (CO2) from coal-fired power plant flue gas. Upon thermal regeneration and condensation of water vapor, CO2 is released in a concentrated form that is suitable for reuse or sequestration. During the research project described in this report, the technical feasibility and economic viability of a thermal-swing CO2 separation process based on dry, regenerable, carbonate sorbents was confirmed. This process was designated as RTI's Dry Carbonate Process. RTI tested the Dry Carbonate Process through various research phases including thermogravimetric analysis (TGA); bench-scale fixed-bed, bench-scale fluidized-bed, bench-scale co-current downflow reactor testing; pilot-scale entrained-bed testing; and bench-scale demonstration testing with actual coal-fired flue gas. All phases of testing showed the feasibility of the process to capture greater than 90% of the CO2 present in coal-fired flue gas. Attrition-resistant sorbents were developed, and these sorbents were found to retain their CO2 removal activity through multiple cycles of adsorption and regeneration. The sodium carbonate-based sorbents developed by RTI react with CO2 and water vapor at temperatures below 80 C to form sodium bicarbonate (NaHCO3) and/or Wegscheider's salt. This reaction is reversed at temperatures greater than 120 C to release an equimolar mixture of CO2 and water vapor. After condensation of the water, a pure CO2 stream can be obtained. TGA testing showed that the Na2CO3 sorbents react irreversibly with sulfur dioxide (SO2) and hydrogen chloride (HCl) (at the operating conditions for this process). Trace levels of these contaminants are expected to be present in desulfurized flue gas. The sorbents did not collect detectable quantities of mercury (Hg). A process was designed for the Na2CO3-based sorbent that includes a co-current downflow reactor system for adsorption of CO2 and a steam-heated, hollow-screw conveyor system for regeneration of the sorbent and release of a concentrated CO2 gas stream. An economic analysis of this process (based on the U.S. Department of Energy's National Energy Technology Laboratory's [DOE/NETL's] 'Carbon Capture and Sequestration Systems Analysis Guidelines') was carried out. RTI's economic analyses indicate that installation of the Dry Carbonate Process in a 500 MW{sub e} (nominal) power plant could achieve 90% CO2 removal with an incremental capital cost of about $69 million and an increase in the cost of electricity (COE) of about 1.95 cents per kWh. This represents an increase of roughly 35.4% in the estimated COE - which compares very favorable versus MEA's COE increase of 58%. Both the incremental capital cost and the incremental COE were projected to be less than the comparable costs for an equally efficient CO2 removal system based on monoethanolamine (MEA).

Download or read book A Low Cost High Capacity Regenerable Sorbent for Pre combustion CO sub 2 Capture written by and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The overall objective of the proposed research is to develop a low cost, high capacity CO2 sorbent and demonstrate its technical and economic viability for pre-combustion CO2 capture. The specific objectives supporting our research plan were to optimize the chemical structure and physical properties of the sorbent, scale-up its production using high throughput manufacturing equipment and bulk raw materials and then evaluate its performance, first in bench-scale experiments and then in slipstream tests using actual coal-derived synthesis gas. One of the objectives of the laboratory-scale evaluations was to demonstrate the life and durability of the sorbent for over 10,000 cycles and to assess the impact of contaminants (such as sulfur) on its performance. In the field tests, our objective was to demonstrate the operation of the sorbent using actual coal-derived synthesis gas streams generated by air-blown and oxygen-blown commercial and pilot-scale coal gasifiers (the CO2 partial pressure in these gas streams is significantly different, which directly impacts the operating conditions hence the performance of the sorbent). To support the field demonstration work, TDA collaborated with Phillips 66 and Southern Company to carry out two separate field tests using actual coal-derived synthesis gas at the Wabash River IGCC Power Plant in Terre Haute, IN and the National Carbon Capture Center (NCCC) in Wilsonville, AL. In collaboration with the University of California, Irvine (UCI), a detailed engineering and economic analysis for the new CO2 capture system was also proposed to be carried out using Aspen PlusTM simulation software, and estimate its effect on the plant efficiency.

Download or read book Low Cost Sorbent for Capturing CO sub 2 Emissions Generated by Existing Coal fired Power Plants written by and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: TDA Research, Inc. has developed a novel sorbent based post-combustion CO2 removal technology. This low cost sorbent can be regenerated with low-pressure (ca. 1 atm) superheated steam without temperature swing or pressure-swing. The isothermal and isobaric operation is a unique and advantageous feature of this process. The objective of this project was to demonstrate the technical and economic merit of this sorbent based CO2 capture approach. Through laboratory, bench-scale and field testing we demonstrated that this technology can effectively and efficiently capture CO2 produced at an existing pulverized coal power plants. TDA Research, Inc is developing both the solid sorbent and the process designed around that material. This project addresses the DOE Program Goal to develop a capture technology that can be added to an existing or new coal fired power plant, and can capture 90% of the CO2 produced with the lowest possible increase in the cost of energy.

Download or read book Carbon Dioxide Capture and Storage written by Intergovernmental Panel on Climate Change. Working Group III. and published by Cambridge University Press. This book was released on 2005-12-19 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt: IPCC Report on sources, capture, transport, and storage of CO2, for researchers, policy-makers and engineers.

Download or read book Calcium and Chemical Looping Technology for Power Generation and Carbon Dioxide CO2 Capture written by Paul Fennell and published by Elsevier. This book was released on 2015-05-21 with total page 467 pages. Available in PDF, EPUB and Kindle. Book excerpt: Calcium and Chemical Looping Technology for Power Generation and Carbon Dioxide (CO2) Capture reviews the fundamental principles, systems, oxygen carriers, and carbon dioxide carriers relevant to chemical looping and combustion. Chapters review the market development, economics, and deployment of these systems, also providing detailed information on the variety of materials and processes that will help to shape the future of CO2 capture ready power plants. - Reviews the fundamental principles, systems, oxygen carriers, and carbon dioxide carriers relevant to calcium and chemical looping - Provides a lucid explanation of advanced concepts and developments in calcium and chemical looping, high pressure systems, and alternative CO2 carriers - Presents information on the market development, economics, and deployment of these systems

Download or read book Investigation of Adsorbent based Warm Carbon Dioxide Capture Technology for IGCC System written by Zan Liu (Ph. D.) and published by . This book was released on 2014 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: Integrated gasification combined cycle with CO2 capture and sequestration (IGCC-CCS) emerges as one of the most promising technologies for reducing CO2 emission from coal power plant without reducing thermal efficiency significantly. However the high capital cost of these plants has limited their deployment. The current solvent-based low-temperature CO2 capture process (Selexol process) is energy and capital intensive contributing to the problem. Sorbent-based warm CO2 capture has been predicted to be a key enabling technology for lowering down the costs of IGCC-CCS. However, no commercial adsorbents or processes exist for these warm CO2 separations. My thesis work has been devoted to developing a solid sorbent and CO2 capture process which can capture CO2 at an elevated temperature in IGCC system. By combining experimental methods and quantum calculation, I have successfully identified and invented one new sorbent material. The sorbent for warm CO2 capture containing magnesium oxide was developed using incipient wetness impregnation. The reversible adsorption isotherm, cyclic stability, and sorption rate were measured using a custom-built high pressure microbalance system and a thermogravimetric analyzer. Experimental data indicate the sorbent has a fairly large regenerable capacity in 180-240 °C temperature range, fast kinetics, low heat of adsorption, and stable working capacity for at least 84 cycles. The new sorbent performs better than synthetic hydrotalcite and K2CO3-promoted hydrotalcite in the temperature range of interest. To assess the applicability of CO2 removal technology to IGCC via a warm pressure swing adsorption (PSA) process based on our newly invented sorbent which has good cyclic sorption-desorption performance at an elevated temperature, a 16-step warm PSA process was simulated using Aspen Adsorption based on the real sorbent properties. I used the model to fully explore the intercorrelation between hydrogen recovery, CO2 capture percentage, regeneration pressure of sorbent, and steam requirement. Their tradeoff effects on IGCC efficiency were investigated by integrating the PSA process into the plant-wide IGCC simulation using Aspen Plus. On the basis of our analysis, IGCC/warm PSA using our new sorbent can produce slightly higher thermal efficiencies than IGCC/cold Selexol. In order to achieve this, warm PSA needs a narrow range of process parameters to have a good balance between the hydrogen loss, steam consumption and work requirement for CO2 compression. Sensitivity analysis is finally conducted to point out the future direction for making warm syngas cleanup more applicable. Further research is needed toward synthesizing new sorbent materials with higher working capacity and improved mass transfer, a better PSA configuration with higher H2 recovery and less steam consumption, new desulfurization process with reduced H2 consumption, and better heat integration. The development in this research would help further improving the efficiency and economics of IGCC/CCS. Overall, my thesis work provides a rigorous analysis framework for identifying and assessing warm CO2 capture by sorbents in an IGCC system. This adsorbent-based warm CO2 capture technology developed in my work can potentially help make IGCC/CCS more affordable and acceptable.

Download or read book Combined cycle Gas Steam Turbine Power Plants written by Rolf Kehlhofer and published by PennWell Books. This book was released on 1999 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: This title provides a reference on technical and economic factors of combined-cycle applications within the utility and cogeneration markets. Kehlhofer - and hos co-authors give the reader tips on system layout, details on controls and automation, and operating instructions.

Download or read book Carbon Dioxide Capture from Coal fired Power Plant Flue Gas on Carbonaceous Sorbents written by Kaspars Krutkramelis and published by . This book was released on 2010 with total page 105 pages. Available in PDF, EPUB and Kindle. Book excerpt: Solid state carbonaceous sorbents are tested and evaluated as potential materials for CO2 capture from coal-fired power plant flue gas. In order to establish economic viability for CO2 capture of carbon materials, elementary adsorption and regeneration experiments have been performed. It has been known that carbon materials have fairly low heat of sorption towards CO2, approximately 20 [kJ/mol CO2] for AC-1. This is advantageous, if one considers and anticipates approximately similar regeneration energy for CO2 release and capture. However, further research in desorption methods demonstrates significantly larger regeneration energy requirements than previously thought. An original direct steam regeneration approach requires theoretical regeneration energy at approximately 311 [kJ/mol CO2] and experimental measurements suggest values closer to 443 [kJ/mol CO2]. Vacuum regeneration is explored next as a potential method for lower desorption energy. It is found that the vacuum desorption process is a considerably better selection with approximately 28 [kJ/mol CO2] theoretical energy requirement for ambient pressure sorption, and 56 and, 85 [kJ/mol CO2] for 3.92 [bar] and 9.72 [bar] PSA respectively. Nevertheless, due to efficiency limitations of physical vacuum systems, CO2 capture by vacuum desorption surges to approximately 101 [kJ/mol CO2] for ambient pressure sorption, and the best case scenario CO2 nominal capture cost is calculated at $40.49/tCO2.

Download or read book Preliminary Carbon Dioxide Capture Technical and Economic Feasibility Study Evaluation of Carbon Dioxide Capture from Existing Fired Plants by Hybrid Sorption Using Solid Sorbents written by and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Development of Novel Carbon Sorbents for CO sub 2 Capture written by and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: An innovative, low-cost, and low-energy-consuming carbon dioxide (CO2) capture technology was developed, based on CO2adsorption on a high-capacity and durable carbon sorbent. This report describes the (1) performance of the concept on a bench-scale system; (2) results of parametric tests to determine the optimum operating conditions; (3) results of the testing with a flue gas from coal-fired boilers; and (4) evaluation of the technical and economic viability of the technology. The process uses a falling bed of carbon sorbent microbeads to separate the flue gas into two streams: a CO2 -lean flue gas stream from which> 90% of the CP2 is removed and a pure stream of CO2 that is ready for compression and sequestration. The carbo sorbent microbeads have several unique properties such as high CO2 capacity, low heat of adsorption and desorption (25 to 28 kJ/mole), mechanically robust, and rapid adsorption and desorption rates. The capture of CO2 from the flue gas is performed at near ambient temperatures in whic the sorbent microbeads flow down by gravity counter-current with the up-flow of the flue gas. The adsorbed CO2 is stripped by heating the CO2-loaded sorbent to - 100°C, in contact with low-pressure ( - 5 psig) steam in a section at the bottom of the adsorber. The regenerated sorben is dehydrated of adsorbed moisture, cooled, and lifted back to the adsorber. The CO2 from the desorber is essentially pure and can be dehydrated, compressed, and transported to a sequestration site. Bench-scale tests using a simulated flue gas showed that the integrated system can be operated to provide> 90% CO2 capture from a 15% CO2 stream in the adsorber and produce> 98% CO2 at the outlet of the stripper. Long-term tests (1,000 cycles) showed that the system can be operated reliably without sorbent agglomeration or attrition. The bench-scale reactor was also operated using a flue gas stream from a coal-fired boil at the University of Toledo campus for about 135 h, comprising 7,000 cycles of adsorption and desorption using the desulfurized flue gas that contained only 4.5% v/v CO2. A capture efficiency of 85 to 95% CO2 was achieved under steady-state conditi ons. The CO2 adsorption capacity did not change significantly during the field test, as determined from the CO2 adsorptio isotherms of fresh and used sorbents. The process is also being tested using the flue gas from a PC-fired power plant at the National Carbon Capture Center (NCCC), Wilsonville, AL. The cost of electricity was calculated for CO2 capture using the carbon sorbent and compared with the no-CO2 capture and CO2 capture with an amine-based system. The increase i the levelized cost of electricity (L-COE) is about 37% for CO2 capture using the carbon sorbent in comparison to 80% for an amine-based system, demonstrating the economic advantage of C capture using the carbon sorbent. The 37% increase in the L-COE corresponds to a cost of capture of $30/ton of CO2, including compression costs, capital cost for the capture system, and increased plant operating and capital costs to make up for reduced plant efficiency. Preliminary sensitivity analyses showed capital costs, pressure drops in the adsorber, and steam requirement for the regenerator are the major variables in determining the cost of CO2 capture. The results indicate that further long-term testing with a flue gas from a pulverized coal fired boiler should be performed to obtain additional data relating to the effects of flue gas contaminants, the ability to reduce pressure drop by using alternate structural packing, and the use of low-cost construction materials.

Download or read book Handbook of Climate Change Mitigation written by Wei-Yin Chen and published by Springer. This book was released on 2012-02-13 with total page 2130 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is a mounting consensus that human behavior is changing the global climate and its consequence could be catastrophic. Reducing the 24 billion metric tons of carbon dioxide emissions from stationary and mobile sources is a gigantic task involving both technological challenges and monumental financial and societal costs. The pursuit of sustainable energy resources, environment, and economy has become a complex issue of global scale that affects the daily life of every citizen of the world. The present mitigation activities range from energy conservation, carbon-neutral energy conversions, carbon advanced combustion process that produce no greenhouse gases and that enable carbon capture and sequestion, to other advanced technologies. From its causes and impacts to its solutions, the issues surrounding climate change involve multidisciplinary science and technology. This handbook will provide a single source of this information. The book will be divided into the following sections: Scientific Evidence of Climate Change and Societal Issues, Impacts of Climate Change, Energy Conservation, Alternative Energies, Advanced Combustion, Advanced Technologies, and Education and Outreach.

Download or read book Carbon Dioxide Capture from Flue Gas Using Dry Regenerable Sorbents written by Raghubir P. Gupta and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes research conducted between January 1, 2006, and March 31, 2006, on the use of dry regenerable sorbents for removal of carbon dioxide (CO{sub 2}) from coal combustion flue gas. An integrated system composed of a downflow co-current contact absorber and two hollow screw conveyors (regenerator and cooler) was assembled, instrumented, debugged, and calibrated. A new batch of supported sorbent containing 15% sodium carbonate was prepared and subjected to surface area and compact bulk density determination.

Download or read book Carbon Dioxide Emission Control and Recycle written by Rahesh A. Khatri and published by . This book was released on 2002 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Carbon dioxide (CO2) has major greenhouse effect as the concentration of CO2 is significantly higher than that of other greenhouse gases. The strategies to control CO2 emissions include is CO2 sequestration, recycle, and efficient use of fossil energy. The key to CO2 sequestration is the control of CO2 emissions from flue gases of coal-fired power plants, since the coal-fired power plants contribute to more than 33% of CO2 emissions in US. One feasible approach to capture CO2 from flue gases is adsorption of CO2 by solid sorbent. The objective of the first part of this study is to develop a solid sorbent with amine functional groups which have potential to adsorb CO2 reversibly. The preparation of this novel amine sorbent involves grafting of aminoalkyltrialkoxysilanes with SBA-15, a well defined mesoporous material with a pore size of 220 Å. The amine-treated SBA-15 is able to adsorb 2464 [mu]mol CO2/g at 30°C and desorb 1091 [mu]mol CO2/g at 120°C. The high capacity of amine treated sorbent will allow the effective use of thermal cycle to uptake CO2 from flue gas. The approach we investigate to recycle CO2 to hydrocarbons is photosynthesis. This research is motivated by abundance of CO2, water, and solar energy. We have used copper based sol-gel derived TiO2 to study the photocatalytic reduction of CO2 to identify the reaction mechanism so that we can design an efficient photocatalyst to convert CO2 to hydrocarbons. One approach to father limit CO2 emissions is by improving the efficiency in conversion of fossil energy to electrical energy. Solid oxide fuel cells (SOFCs) have gained interest recently due to its high efficiency in production of electricity. We have constructed a SOFC operating on methane to evaluate the efficiency of catalyst in electricity generation. Results of these studies show that we were able to design a solid sorbent with amine functional groups on mesoporous material surface which have high CO2 adsorption capacity. The Cu/sol-gel TiO2 catalyst does show activity for production of hydrocarbons which was confirmed using IR spectroscopy and Gas chromatography. We have successfully constructed a SOFC to evaluate the catalyst for the fuel cell reactions."--P. iii-iv.

Download or read book Post combustion Carbon Dioxide Capture Materials written by Qiang Wang and published by Royal Society of Chemistry. This book was released on 2018-10-22 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: An introduction to the different inorganic adsorbents/sorbents used in post-combustion carbon dioxide capture.

Download or read book Inorganic Carbon Compounds Advances in Research and Application 2013 Edition written by and published by ScholarlyEditions. This book was released on 2013-06-21 with total page 810 pages. Available in PDF, EPUB and Kindle. Book excerpt: Inorganic Carbon Compounds—Advances in Research and Application: 2013 Edition is a ScholarlyBrief™ that delivers timely, authoritative, comprehensive, and specialized information about ZZZAdditional Research in a concise format. The editors have built Inorganic Carbon Compounds—Advances in Research and Application: 2013 Edition on the vast information databases of ScholarlyNews.™ You can expect the information about ZZZAdditional Research in this book to be deeper than what you can access anywhere else, as well as consistently reliable, authoritative, informed, and relevant. The content of Inorganic Carbon Compounds—Advances in Research and Application: 2013 Edition has been produced by the world’s leading scientists, engineers, analysts, research institutions, and companies. All of the content is from peer-reviewed sources, and all of it is written, assembled, and edited by the editors at ScholarlyEditions™ and available exclusively from us. You now have a source you can cite with authority, confidence, and credibility. More information is available at http://www.ScholarlyEditions.com/.

Download or read book ASSESSMENT OF LOW COST NOVEL SORBENTS FOR COAL FIRED POWER PLANT MERCURY CONTROL written by and published by . This book was released on 2004 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a Technical Report under a program funded by the Department of Energy's National Energy Technology Laboratory (NETL) to obtain the necessary information to assess the viability of lower cost alternatives to commercially available activated carbon for mercury control in coal-fired utilities. Novel sorbent evaluations at We Energies' Pleasant Prairie Power Plant (P4) Unit 1 (no SCR in place) have been completed. Nineteen sorbents were evaluated for mercury control. A batch injection rate of 1 lb/Mmacf for 1 hour was conducted for screening purposes at a temperature of 300 F. Four sorbents were further evaluated at three injection rates and two temperatures. The multi-pollutant control test system (PoCT) was installed on P4's Unit 2 (with an SCR) and sorbent evaluations are continuing. Evaluations will continue through the end of January 2004. Tests and analysis on samples from Powerton and Valley to yield waste characterization results for the COHPAC long-term tests are continuing. A no-cost time extension for work to be completed by March 31, 2004 was granted by DOE/NETL.