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.
Avis des internautes - Rédiger un commentaire
Aucun commentaire n'a été trouvé aux emplacements habituels.
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
Autres éditions - Tout afficher
Characterization and Design of Zeolite Catalysts: Solid Acidity, Shape ...
Miki Niwa,Naonobu Katada,Kazu Okumura
Aucun aperçu disponible - 2012
acid strength activity adsorbed adsorption alkane ammonia ammonia desorption amount application atoms bond calculated Catal catalyst cation Chem chemical circle cluster concentration constant cracking crystal decreases depends deposition deposition of silica desorption determined dispersed distribution effect energy enhanced exchange experiment experimental external surface formation framework functional heat important increases intensity IR-TPD IRMS-TPD Katada kinds Lewis acid loaded materials measured mechanism Mesoporous metal metal oxide method modified molecule mordenite NH4C Niwa o-xylene observed obtained OH bands oxide parameters partial peak phase Phys pore pore-opening position prepared reaction reduction relationship respectively sample selectivity shape selectivity shown in Fig shows silica similar species spectra strong structure studied Table temperature tion toluene triangle usual utilized values vapor various zeolite