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The Selective Catalytic Reduction Of Nitric Oxide By Propylene Over Bimetallic Ceo2 Zro2 Supported Catalyst
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Book Synopsis The Selective Catalytic Reduction of Nitric Oxide by Propylene Over Bimetallic CeO2-ZrO2 Supported Catalyst by : Chee Ming Chong
Download or read book The Selective Catalytic Reduction of Nitric Oxide by Propylene Over Bimetallic CeO2-ZrO2 Supported Catalyst written by Chee Ming Chong and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Selective Catalytic Reduction of Nitric Oxide by Propylene Over Supported Platinum Catalysts by : Dinyar K. Captain
Download or read book The Selective Catalytic Reduction of Nitric Oxide by Propylene Over Supported Platinum Catalysts written by Dinyar K. Captain and published by . This book was released on 2000 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Metal - Modified CeO2 and ZrO2 Catalysts for Nitric Oxide Decomposition and Selective Catalytic Reduction by Methane by : Christoforos Kazazis
Download or read book Metal - Modified CeO2 and ZrO2 Catalysts for Nitric Oxide Decomposition and Selective Catalytic Reduction by Methane written by Christoforos Kazazis and published by . This book was released on 1996 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Selective Catalytic Reduction of Nitrous Oxide by Propylene Over Supported Rhodium Catalysts by : Tammie Yvonne Robinson
Download or read book Selective Catalytic Reduction of Nitrous Oxide by Propylene Over Supported Rhodium Catalysts written by Tammie Yvonne Robinson and published by . This book was released on 1998 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concern about the 150 years atmospheric lifetime for nitrous oxide led to this study of effect selective catalytic reduction of nitric oxide by propylene over supported rhodium catalysts. Nitrous oxide is a suspected participant in stratospheric ozone destruction and global warming. Effects of support, concentration, and temperature were addressed on selective catalytic reduction.
Book Synopsis New Heterogeneous Catalysts for the Selective Reduction of NOx Under Lean Conditions. Final Report by :
Download or read book New Heterogeneous Catalysts for the Selective Reduction of NOx Under Lean Conditions. Final Report written by and published by . This book was released on 2004 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: The original goal of this program was the identification and design of new noble-metal-based catalysts for the selective catalytic reduction of nitric oxide by hydrocarbons under excess oxygen (i.e., ''lean'') conditions (HC-SCR). Work conducted in the first funding cycle of this award (i.e., 1997-2000) was successful in allowing us to develop an understanding of the fundamental surface chemistry taking place during the adsorption and reaction of nitrogen oxides and propylene on the surface of supported noble metal catalysts. Both experimental results collected in our own group as well as molecular simulation results published by Professor Neurock suggested that in order to improve the performance of the Pt catalysts--in terms of the nitrogen selectivity and the temperature window of operation-- it was necessary to introduce a second metal. However, synthesizing such catalysts with the metals of interest (i.e., Pt-Au, Pt-Ru, Pt-Rh, etc.) with some degree of control of the structure and composition of the resulting supported metal particles is in itself a research challenge. Consequently, the bulk of our efforts during the second funding cycle of this award (covered by this report) was shifted to the use of organometallic cluster precursors for the synthesis on novel bimetallic catalysts. During this time we have also continued to maintain an interest in NOx abatement, but have redirected our efforts from the HC-SCR process to the more promising from a commercial standpoint NOx Storage Reduction (NSR) approach.
Book Synopsis Development and Characterization of Mixed Oxide Catalysts for the Selective Catlytic Reduction of Nitric Oxide from Stationary Sources Using Amonnia by :
Download or read book Development and Characterization of Mixed Oxide Catalysts for the Selective Catlytic Reduction of Nitric Oxide from Stationary Sources Using Amonnia written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Seven first row transition metals were deposited on various commercial TiO2, SiO2, and Al2 O3 supports to create mono- and bimetallic catalysts that were compared in the selective catalytic reduction of nitric oxide using ammonia at low temperatures ranging from 373-523 K. The catalyst with the highest activity both in the absence and presence of water in the feed was 20 wt.% Mn/Hombikat TiO2 synthesized from a nitrate precursor and calcined below 673 K. Under those conditions, it was capable of achieving 100% NO conversion at 393 K. Numerous surface characterization techniques were used to identify the surface properties that result in highly active and selective low temperature SCR catalysts. The deposition of manganese as MnO2, the ease of reducibility of the metal oxide, and the symmetric deformation of ammonia coordinated to Lewis acid sites at 1167 cm−1, were all found to be important for good catalytic performance. No synergistic effects were observed from combinations of the three most active transition metals. However, MnO x -NiO/TiO2 had an extended lifetime relative to MnO x /TiO2 in feeds containing SO2 . The extensive data collected from in-situ FTIR experiments in the presence of NO and NH 3 were used to propose a reaction mechanism for MnO x /TiO2 that begins with the coordination of NH3 over Mn4 species and proceeds through the formation of bridged nitrates. A combination of potentiometric titrations and UV/Vis spectroscopy were used to quantify the reduction of V5 to V4 after the addition of oxalic acid as the solution is aged. After approximately four hours, the aging vanadium oxalate solution reaches steady state, and the final distribution of the vanadium present is 89% V+4 and 11% V+5 . TiO2 supported monolayer catalysts synthesized from the aged (V+4) vanadium oxalate solution consistently outperformed catalysts made from freshly prepared (V+5) vanadium oxalate solutions. Surface characterization revealed that surface acid sites increase in strength and vanadia reduces more easily in catalysts synthesized from aged vanadium oxalate solutions, which enhances reaction mechanism depends upon acid sites and redox operation.
Book Synopsis Selective Catalytic Reduction of Nitric Oxide Over Activated Carbon-based Catalysts by : Sayed Naveed Ahmed
Download or read book Selective Catalytic Reduction of Nitric Oxide Over Activated Carbon-based Catalysts written by Sayed Naveed Ahmed and published by . This book was released on 1993 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Selective Catalytic Reduction of NOx by : Oliver Kröcher
Download or read book Selective Catalytic Reduction of NOx written by Oliver Kröcher and published by MDPI. This book was released on 2018-12-14 with total page 281 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a printed edition of the Special Issue "Selective Catalytic Reduction of NOx" that was published in Catalysts
Book Synopsis The Mechanism of Selective Catalytic Reduction of Nitric Oxide by Propane Over Alumina Supported Oxide Catalysts by : Chuanhua He
Download or read book The Mechanism of Selective Catalytic Reduction of Nitric Oxide by Propane Over Alumina Supported Oxide Catalysts written by Chuanhua He and published by . This book was released on 2005 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Selective Catalytic Reduction of Nitric Oxide with Methane on Bifunctional Zeolite Catalysts by : Masaru Ogura
Download or read book Selective Catalytic Reduction of Nitric Oxide with Methane on Bifunctional Zeolite Catalysts written by Masaru Ogura and published by . This book was released on 1998 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Superior Catalysts for Selective Catalytic Reduction of Nitric Oxide by :
Download or read book Superior Catalysts for Selective Catalytic Reduction of Nitric Oxide written by and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Pillared Clays as Superior Catalysts for Selective Catalytic Reduction of Nitric Oxide by :
Download or read book Pillared Clays as Superior Catalysts for Selective Catalytic Reduction of Nitric Oxide written by and published by . This book was released on 1999 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the last annual reports, we reported Cu-exchanged pillared clays as superior selective catalytic reduction (SCR) catalysts. During the past year we explored the possibilities with MCM-41, a new class of molecular sieve. In this report, Rh exchanged Al-MCM-41 is studied for the SCR of NO by C3H6 in the presence of excess oxygen. It shows a high activity in converting NO to N2 and N2O at low temperatures. In situ FT-IR studies indicate that Rh-NO species (1910-1898 cm−1) is formed on the Rh-Al-MCM-41 catalyst in flowing NO/He, NO+O2/He and NO+C3H6+O2/He at 100-350 C. This species is quite active in reacting with propylene and/or propylene adspecies (e.g., [pi]-C3H5, polyene, etc.) at 250 C in the presence/absence of oxygen, leading to the formation of the isocyanate species (Rh-NCO, at 2174 cm−1), CO and CO2. Rh-NCO is also detected under reaction conditions. A possible reaction pathway for reduction of NO by C3H6 is proposed. In the SCR reaction, Rh-NO and propylene adspecies react to generate the Rh-NCO species, then Rh-NCO reacts with O2, NO and NO2 to produce N2, N2O and CO2. Rh-NO+ and Rh-NCO species are two main intermediates for the SCR reaction on Rh-Al-MCM-41 catalyst.
Book Synopsis A Comparative Study of the H2-assisted Selective Catalytic Reduction of Nitric Oxide by Propene Over Noble Metal (Pt, Pd, Ir)/γ-Al2O3 Catalysts by :
Download or read book A Comparative Study of the H2-assisted Selective Catalytic Reduction of Nitric Oxide by Propene Over Noble Metal (Pt, Pd, Ir)/γ-Al2O3 Catalysts written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Selective Catalytic Reduction of Nitric Oxide by Ammonia Over Iron Exchanged Y Zeolites by : Michael Dimitrios Amiridis
Download or read book Selective Catalytic Reduction of Nitric Oxide by Ammonia Over Iron Exchanged Y Zeolites written by Michael Dimitrios Amiridis and published by . This book was released on 1991 with total page 684 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Superior Catalysts for Selective Catalytic Reduction of Nitric Oxide. Annual Technical Report, September 30, 1993--September 29, 1994 by :
Download or read book Superior Catalysts for Selective Catalytic Reduction of Nitric Oxide. Annual Technical Report, September 30, 1993--September 29, 1994 written by and published by . This book was released on 1995 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt: A delaminated Fe2O3-pillared clay catalyst was prepared for the selective catalytic reduction (SCR) of NO by NH3 at above 300°C. The delaminated pillard clay was characterized by ICP-AES (Inductively Coupled Plasma-Atomic Emission Spectroscopy) chemical analysis, XRD (X-ray diffraction) structure and line broadening analyses, micropore size probing, and Moessbauer analysis. These analyses showed that the catalyst contained fragmented Fe2O3-pillared clay forming {open_quotes}house-of-cards{close_quotes} structure with dispersed Fe2O3 particles approximately 170 Å in size. The SCR activity of the delaminated pillard clay was higher than the commercial-type V2O5 + WO3/TiO2 catalyst, and also higher than the undelaminated pillard clay and supported Fe2O3 catalysts, under conditions with SO2. Infrared measurements of adsorbed NH3 showed strong Bronsted acidity which was caused possibly by interactions between Fe2O3 and clay.
Book Synopsis Nitric Oxide Selective Catalytic Reduction with Methane by : Enrique Aceves
Download or read book Nitric Oxide Selective Catalytic Reduction with Methane written by Enrique Aceves and published by . This book was released on 2000 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Abatement of Nitric Oxide by Catalytic Decomposition and Selective Catalytic Reduction with Hydrocarbons by : Kari Eränen
Download or read book Abatement of Nitric Oxide by Catalytic Decomposition and Selective Catalytic Reduction with Hydrocarbons written by Kari Eränen and published by . This book was released on 2004 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt:
