Characterization and Design of Zeolite Catalysts: Solid Acidity, Shape Selectivity and Loading Properties
Catalysis and catalyst is a key technology to solve the problems in energy and environment issues to sustain our human society. We believe that comprehensive understanding of the catalysis and catalyst provides us a chance to develop a new catalyst and contributes greatly to our society. However, the ?eld of heterogeneous catalyst is dif?cultto study andstill stays behindmoredeveloped?elds ofchemistry such as organic and physical chemistries. This is a dilemma to the chemists who study the catalysis and catalyst. While we can accomplish the progress in the - dustrial application, the scienti?c understandingis not complete yet. A gap between the useful application and incomplete scienti?c understanding, however, becomes smaller and smaller in recent years. Because zeolites are ?ne crystals, and the structure is clearly known, the study on the catalysis using the zeolites is easier than those encountered in other catalysts such as metals and metal oxides. Very fortunately, zeolites provide us the strong acidity with the ?ne distribution which enables various useful catalytic reactions. When some metals and cations are loaded in close to the acid sites, these loadede- ments show extraordinarycharacters, and many catalytic reactions proceed thereon.
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Chapter 2 Solid Acidity of Zeolites
Chapter 3 IRMSTPD Measurements of Acid Sites
Chapter 4 DFT Calculation of the Solid Acidity
Chapter 5 Catalytic Activity and Adsorption Property
Chapter 6 CVD of Silica for the Shape Selective Reaction
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Characterization and Design of Zeolite Catalysts: Solid Acidity, Shape ...
Miki Niwa,Naonobu Katada,Kazu Okumura
Aucun aperçu disponible - 2012
acid strength activation energy adsorbed adsorption alkane alkoxide ammonia desorption heat ammonia TPD atoms band position bromobenzene Brønsted acid sites Brønsted OH Catal catalyst catalytic activity cation Chabazite Chem chemical chemical vapor deposition concentration cracking crystal CVD of silica deposited silica deposition of silica dispersed PdO EXAFS exchange degree experimental observation external surface extra-framework formation framework H-mordenite h-peak H-Y zeolite hydrocarbons IR-TPD isobutene Katada Lewis acid Lewis acid sites measured metal oxide metal Pd methane methanol method Microporous Mesoporous Mater mol1 molecule mordenite MS-TPD Murakami NH4C Niwa number of acid o-xylene OH bands oxide parameters Pd loaded Pd–Pd peak periodic boundary Phys pore reduction sample shape selectivity shown in Fig shows silica silica deposited silica overlayer silicalite SiO2 sodalite solid acidity species spectra structure studied temperature Temperature/K tion toluene TPD experiment USY zeolite wavenumber XAFS zeolite zeolite acidity zeolite catalysts ZrO2