Download or read book Catalytic Wet Oxidation of Phenol in Batch and Trickle Bed Reactors Over a Pt TiO2 Catalyst written by Clayton Butler Maugans and published by . This book was released on 1999 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Encyclopedia of Environmental Management Four Volume Set written by Sven Erik Jorgensen and published by CRC Press. This book was released on 2012-12-13 with total page 3513 pages. Available in PDF, EPUB and Kindle. Book excerpt: Winner of an Outstanding Academic Title Award from CHOICE Magazine Encyclopedia of Environmental Management gives a comprehensive overview of environmental problems, their sources, their assessment, and their solutions. Through in-depth entries and a topical table of contents, readers will quickly find answers to questions about specific pollution and management issues. Edited by the esteemed Sven Erik Jørgensen and an advisory board of renowned specialists, this four-volume set shares insights from more than 500 contributors—all experts in their fields. The encyclopedia provides basic knowledge for an integrated and ecologically sound management system. Nearly 400 alphabetical entries cover everything from air, soil, and water pollution to agriculture, energy, global pollution, toxic substances, and general pollution problems. Using a topical table of contents, readers can also search for entries according to the type of problem and the methodology. This allows readers to see the overall picture at a glance and find answers to the core questions: What is the pollution problem, and what are its sources? What is the "big picture," or what background knowledge do we need? How can we diagnose the problem, both qualitatively and quantitatively, using monitoring and ecological models, indicators, and services? How can we solve the problem with environmental technology, ecotechnology, cleaner technology, and environmental legislation? How do we address the problem as part of an integrated management strategy? This accessible encyclopedia examines the entire spectrum of tools available for environmental management. An indispensable resource, it guides environmental managers to find the best possible solutions to the myriad pollution problems they face. Also Available Online This Taylor & Francis encyclopedia is also available through online subscription, offering a variety of extra benefits for researchers, students, and librarians, including: Citation tracking and alerts Active reference linking Saved searches and marked lists HTML and PDF format options Contact us to inquire about subscription options and print/online combination packages. US: (Tel) 1.888.318.2367 / (email) [email protected] International: (Tel) +44 (0) 20 7017 6062 / (email) [email protected]
Download or read book Catalytic Wet Air Oxidation of Phenol in a Trickle Bed Reactor Kinetics Kinetics and Reactor Modelling written by Athanasios Eftaxias and published by . This book was released on 2002 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Catalytic Wet Oxidation of Organic Rich Aqueous Fraction Derived from Biomass Thermochemical Processing with Novel Char Catalysts in Microscale Based Reactors written by Iva Jovanovic Tews and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Development of alternative fuel refineries, in order to improve global sustainability through increased biofuel production, has been increasingly supported by both government and private companies. Thermochemical processes such as hydrothermal liquefaction (HTL) and pyrolysis are leading technologies in this area. However, characterization, treatment, and reuse of aqueous by-products produced by such processes have received little attention. This dissertation is focused on aqueous phase characterization and catalytic advanced oxidation processing in novel microscale reactors. Novel char catalysts and improved process design were developed for efficient removal of organic contaminants. Small acids, cyclic pentenes, and carboxylic compounds such as phenol were initially identified. Model compounds were chosen based on these findings, and catalytic wet oxidation (CWO) processes in batch reactors conducted, in order to obtain reaction rate kinetics. The mechanism of compound oxidation was developed and shown through DFT analysis to be a production of hydroxyl free radicals (OH0́) in the presence of an oxidant and the N-doped char catalyst. The OH0́ free radicals readily react with the dissolved organic compound, which was further confirmed with a FeO-N-doped char catalysts in a modified Fenton-like reaction system. In order to better develop a treatment processes which could integrate with a biorefinery, all process engineering experiments were conducted in a continuous solid-catalyzed microscale-based reactor utilizing the FeO-N-doped char catalyst. Time scale analysis was used for reactor geometry optimization in an effort to reduce diffusion time. The design led to a parallel plate reactor with channel depth of 500 microns. Thermochemical aqueous phases produced by pilot scale processes were characterized in detailed by extensive analytical methods. Traditional methods of spectroscopic analysis were limited in the ability to identify more complex oligomeric compounds and thus newer methods such as ICR-MS were utilized. The aqueous phases were successfully treated by the novel catalyst in the microreactor with removal of over 70% total organic carbon present at atmospheric pressure and at 90 ℗ʻC. Some aqueous phase samples were more complex in nature however, successful decontamination was achieved. Catalytic wet oxidation processing in microscale-based reactors proves to be a plausible treatment option for process water in biorefineries.
Download or read book Catalytic Wet Oxidation of Phenols written by Suranjana V. Mayani and published by LAP Lambert Academic Publishing. This book was released on 2011-10 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: Phenol and its analogues such as 2-chlorophenol, 4-chlorophenol, 2,4,6-trichlorophenol, 2-nitrophenol, 4-nitrophenol are persistent and toxic organic compounds, harmful to organisms and humans even at low concentrations. Biological oxidation used for removing organics from industrial effluents is not suitable for these compounds and catalytic wet oxidation is one of the major alternatives for their destruction. The main objective of our research is preparation of mesoporous MCM-41 material with incorporation of transition metals like Fe, Co, Ni, Mn into the framework sites, physico-chemical characterization of the catalyst and testing the catalytic activity of MCM41-supported metal catalysts for wet oxidation of phenol and its analogues in water with the aim of destroying these contaminants. Consequently, we have optimized the catalysts and the reaction conditions for catalytic wet oxidation of phenol and its analogues, analyzed the products by GC-MS and established the mechanism of oxidation of the phenolic compounds, examined the catalysts with respect to their leaching characteristics and hence, evaluating their green chemistry role during their utilization.
Download or read book Index Medicus written by and published by . This book was released on 2003 with total page 1844 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vols. for 1963- include as pt. 2 of the Jan. issue: Medical subject headings.
Download or read book Catalytic Oxidation of Hydrocarbons written by Karl C. Stein and published by . This book was released on 1963 with total page 1200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Directory of Graduate Research written by and published by . This book was released on 2001 with total page 1846 pages. Available in PDF, EPUB and Kindle. Book excerpt: Faculties, publications and doctoral theses in departments or divisions of chemistry, chemical engineering, biochemistry and pharmaceutical and/or medicinal chemistry at universities in the United States and Canada.
Download or read book Catalytic Wet Oxidation Over Pillared Clay Catalyst in Packed bed Reactors written by Jing Guo and published by . This book was released on 2005 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Catalytic Supercritical Water Oxidation of Model Pollutants written by Jianli Yu and published by . This book was released on 2000 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wastewater Treatment by Catalytic Wet Air Oxidation in a Continuous Pilot scale Trickle Bed Reactor written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: HKUST Call Number: Thesis CENG 2004 Wu.
Download or read book Catalytic Wet Air Oxidation of Ethylene Glycol in a Trickle bed Reactor written by Alison Fiona Miller and published by . This book was released on 1998 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pathway Analysis of Phenol Degradation by UV TiO2 Photocatalysis Using the Carbon 13 Isotopic Labelling Technique written by Lindelwa Jay and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The United States Environmental Protection Agency (USEPA) has enlisted phenolic compounds as pollutants of priority concern, as they tend to persist in the environment over a long period, accumulate and exert toxic effects on humans and animals. The entrance of phenolic compounds into the aquatic environment results from natural, industrial, domestic and agricultural activities. Their presence may be due to the degradation or decomposition of natural organic matter present in the water, through the disposal of industrial and domestic wastes into water bodies and through runoffs from agricultural land. Several specific new technologies, called Advanced Oxidation Processes (AOP), have been developed to eliminate dangerous organic chemicals such as phenol from polluted waters. The photocatalytic process, based on UV irradiated semiconductor (TiO2), represents one of AOP that provide an interesting route to the destruction of many organic substances to CO2, H2O and corresponding mineral acids. TiO2 is usually used as a photocatalyst in two crystal structures: Rutile and Anatase. The photoreactivity of P-25 Degussa, consisting of anatase and rutile (4/1 w/w), exceeds that of pure anatase and rutile in several reaction systems. This study characterised the three TiO2 powder forms by BET, XRD, XRF and SEM analyses to contribute to a better understanding of their physical properties. Anatase was revealed to have 98.4% purity x-ray fluorescence analysis, Degussa at 96.7% and rutile at 75.7% was reported to have the most impurities (~25%). This study investigated the UV/TiO2 photocatalytic degradation of phenol, with emphasis on the effects of; solution pH, catalyst load, initial phenol concentration, dissolved oxygen and UV radiation intensity. Degradation studies were conducted in a batch reactor with photons for catalyst (TiO2) activation supplied by a medium pressure 400 W UV lamp immersed in the pollutant solution housed in a double jacket quartz sleeve, which served as the cooling system for the lamp. Temperature control in the reactor was achieved by circulating cold water through the outer cavity of the quartz sleeve. The reactor contents in all batches were aerated at a flow rate of 10 mL/min. Thorough mixing of the contents of the reactor was achieved by continuous agitation with a magnetic stirrer. The experimental reaction time was set at 60-100minutes. Samples were monitored by GC-MS analysis. Results showed that UV/TiO2 photocatalysis is an effective method for the removal of phenol from wastewaters. The efficiency of the process depends strongly on the experimental conditions. Degradation of organic compounds in water is often accompanied by the formation of several intermediate compounds, some of which may be more toxic than the original pollutant. The carbon-13 isotopic labelling technique was employed to track the degradation mechanism of phenol to better understand the degradation pathway. Carbon-13 tracking results revealed that hydroquinone, catechol, benzoquinone, resorcinol and maleic acid were the main intermediates containing the C-13 isotope. A reaction pathway was postulated based on these findings. Kinetic isotope effect (KIE) experiments were conducted and a primary isotope effect was observed. This confirmed that the C-13 isotope position on the labelled phenol was the site of bond breaking in the rate-limiting step.
Download or read book The Catalytic Oxidation of Alcohols Over Metallic Catalysts written by Robert Merrill Simington and published by . This book was released on 1927 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Garcia Ochoa F Catalytic wet oxidation of phenol kinetic of phenol uptake written by Jelka Kurnik and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Catalytic Oxidation of Organic Compounds in the Vapor Phase written by Leroy Frank Marek and published by . This book was released on 1932 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Catalytic Oxidation of Phenol written by Marvin Jacoby and published by . This book was released on 1941 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
