Download or read book Chemisorption Reaction and Desorption Studies of Coal Chars in Steam Oxygen and Carbon Dioxide written by L. R. Radovic and published by . This book was released on 1990 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of a transient kinetics (TK) technique allowed a direct measurement of reactive surface area (RSA) for chars gasified in both CO2 and O2, i.e., gasification rates normalized with respect to RSA were essentially constant over the entire conversion range. A temperature-programmed desorption (TPD) technique was also used to determine the amount of reactive surface intermediate formed on these chars during gasification in CO2 and O2; the results were in good agreement with those obtained by TK. In addition, TPD allowed an important distriction to be made between the stable C-O complexes and reactive C(O) intermediates residing on the char surface during gasification in CO2 and O2. The application of these two independent but complementary techniques provided a satisfactory quantitative understanding of char reactivity variations with conversion in CO2 and O2. Both techniques possess the unique capability of separately determining the reaction rate constant (site reactivity or turnover frequency) and the number of active sites participating in the reaction (RSA). A comparison of turnover frequencies for different chars gasified in 1 atm CO2 suggested that char gasification may be a structure sensitive reaction. The concept of reactive surface area was also used to achieve a better quantitative understanding of catalyzed char reactivity variations with conversion in carbon dioxide.

Download or read book Energy Research Abstracts written by and published by . This book was released on 1992-03 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fundamental Issues in Control of Carbon Gasification Reactivity written by L Lahaye and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 621 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the last decade there has been a renewed interest in under standing from a fundamental point of view the gasification of carbon. Basi cally there are two major issues in controlling the reactivity of carbon: i) reduction of the gasification rate of carbon materials in hostile environment ii) increase of the gasification rate in order to utilize carbonaceous compounds more effectively. Although these two objectives look somewhat contradictory, they are part of the general topics of understanding gasification reactivity of carbon. Refractory applications of carbon in furnace linings, seals and vanes, as well as the use of carbon-carbon or carbon-ceramic composites in struc tures able to withstand corrosion at high temperature require a better understanding of the fundamentals involved in carbon-oxidizing gas (02' CO , H 0) reactions. Furthermore a great interest of aluminium producers 2 2 is 10 extending the lifetime of carbon electrodes in alumina electrolysis which primarily depends on reducing their consumption rates by air or carbon dioxide. Proper control of gasification reactions is also of prime importance in manufacturing carbonaceous adsorbents like granular activated carbon clothes of high adsorption characteristics. The balance between increase of porosity and decrease in mechanical strength during activation is critical for developing new porous types of carbon materials in particular for carbon clothes and this can only be achieved by a careful control of the gasification reaction.

Download or read book Coal Abstracts written by and published by . This book was released on 1992 with total page 744 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Announcements Index written by and published by . This book was released on 1988 with total page 1132 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Gas Abstracts written by and published by . This book was released on 1991 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Intrinsic Reaction Kinetics of Coal Chars with Oxygen Carbon Dioxide and Steam at Elevated Pressures written by Daniel Geoffrey Roberts and published by . This book was released on 2007 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book ERDA Energy Research Abstracts written by United States. Energy Research and Development Administration and published by . This book was released on 1976 with total page 988 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book ERDA Research Abstracts written by United States. Energy Research and Development Administration and published by . This book was released on 1976 with total page 716 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book ERDA Energy Research Abstracts written by United States. Energy Research and Development Administration. Technical Information Center and published by . This book was released on 1976 with total page 724 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government reports annual index written by and published by . This book was released on 199? with total page 1322 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Annual Index Keyword A L written by and published by . This book was released on 1988 with total page 1016 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Experimental Investigations of Pulverized Coal Char Reactions with Oxygen Carbon Dioxide and Steam written by and published by . This book was released on 2011 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Advances in Thermochemical Biomass Conversion written by A.V. Bridgwater and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 1730 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an account of the state-of-the-art in thermochemical biomass conversion and arises from the third conference in a series sponsored by the International Energy Agency's Bioenergy Agreement. Fundamental and applied research topics are included, reflecting recent advances as well as demonstration and commercial innovation.

Download or read book Government Reports Announcements Index written by and published by . This book was released on 1987 with total page 1168 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Spectroscopy Dynamics and Molecular Theory of Carbon Plasmas and Vapors written by Laszlo Nemes and published by World Scientific. This book was released on 2011 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ch. 1. Spectroscopy of carbon nanotube production processes / B.A. Cruden -- ch. 2. Spectroscopic studies on laser-produced carbon vapor / K. Sasaki -- ch. 3. Kinetic and diagnostic studies of carbon containing plasmas and vapors using laser absorption techniques / J. Ropcke, A. Rousseau and P.B. Davies -- ch. 4. Spectroscopy of carbon containing diatomic molecules / J.O. Hornkohl, L. Nemes and C. Parigger -- ch. 5. Optical emission spectroscopy of C[symbol] and C[symbol] molecules in laser ablation carbon plasma / N.A. Savastenko and N.V. Tarasenko -- ch. 6. Intra-cavity laser spectroscopy of carbon clusters / S. Raikov and L. Boufendi -- ch. 7. Dynamics of laser-ablated carbon plasma for thin film deposition : spectroscopic and imaging approach / R.K. Thareja and A.K. Sharma -- ch. 8. Laser spectroscopy of transient carbon species in the context of soot formation / V. Nevrly [und weitere] -- ch. 9. Developing new production and observation methods for various sized carbon nanomaterials from clusters to nanotubes / T. Sugai -- ch. 10. Potential model for molecular dynamics of carbon / A.M. Ito and H. Nakamura -- ch. 11. Electronic and molecular structures of small- and medium-sized carbon clusters / V. Parasuk -- ch. 12. Vibrational spectroscopy of linear carbon chains / C.-P. Chou [und weitere] -- ch. 13. Dynamics simulations of fullerene and SWCNT formation / S. Irle [und weitere] -- ch. 14. Mechanisms of carbon gasification reactions using electronic structure methods / J.F. Espinal, T.N. Truong and F. Mondragon

Download or read book Fossil Energy Update written by and published by . This book was released on 1983 with total page 844 pages. Available in PDF, EPUB and Kindle. Book excerpt: