Dealumination of Zeolite Beta Catalyst Under Controlled Conditions for Enhancing its Activity in Acylation and Esterification
スポンサーリンク
概要
- 論文の詳細を見る
This work deals with the dealumination of zeolite beta (HBEA) under different conditions to optimize its catalytic performance. The dealumination was carried out either using oxalic or tartaric acid solution of different pH values or steaming up to 500℃. The dealuminated zeolite samples were characterized using X-ray diffraction (XRD), N2-physisorption, ICP, 27Al NMR and NH3-TPD. Their catalytic activities were studied for acylation reaction of 2-methoxy naphthalene or naphthalene with acetic anhydride and esterification of benzyl alcohol with hexanoic acid. Among the dealuminated samples examined, those treated with oxalic acid or tartaric acid at pH 2 showed high activity. The high activity can be correlated with the relative increase in the amount of strong acid sites and with the enhanced accessibility of the reactants to the active sites, which are caused by removal of extra-framework Al species on the acid treatments.
著者
-
Arai Masahiko
Div. Of Chemical Process Engineering Graduate School Of Engineering Hokkaido Univ. Sapporo 060-8628
-
Iwasa Nobuhiro
Hokkaido Univ. Sapporo Jpn
-
Iwasa N
Hokkaido Univ. Hokkaido Jpn
-
Fujita Shin-ichiro
Div. Of Chemical Process Engineering Graduate School Of Engineering Hokkaido Univ. Sapporo 060-8628
関連論文
- Hydrogenation of phenol with supported Rh catalysts in the presence of compressed CO2 : Its effects on reaction rate, product selectivity and catalyst life
- Dealumination of Zeolite Beta Catalyst Under Controlled Conditions for Enhancing its Activity in Acylation and Esterification
- Hydrogen Production by Steam Reforming of Methanol
- Mesoporous smectites incorporated with alkali metal cations as solid base catalysts
- Synthesis of N, N'-Disubstituted Urea from Ethylene Carbonate and Amine Using CaO
- Kinetic Analysis of Hydrogenation of Cinnamaldehyde with a Ruthenium Complex Catalyst in Several Solvents
- Hydroformylation of 1-hexene using polymer-supported rhodium catalysts in supercritical carbon dioxide
- Recyclability of water-soluble ruthenium–phosphine complex catalysts in multiphase selective hydrogenation of cinnamaldehyde using toluene and pressurized carbon dioxide
- A comparative study of supported aqueous- and ethylene glycol-phase catalysts in stilbene hydrogenation: Influence of the different modes of dispersion of supported liquids
- Selective PdZn Alloy Formation in the Reduction of Pd/ZnO Catalysts
- Selective hydrogenation of chloronitrobenzene to chloroaniline in supercritical carbon dioxide over Ni/TiO2: Significance of molecular interactions
- Selective hydrogenation of nitrobenzene to aniline in dense phase carbon dioxide over Ni/γ-Al2O3: Significance of molecular interactions
- The Surface Heterogeneity of Supported Platinum Catalysts as Studied by the Interrupted Temperature-Programmed Desorption of Carbon Monoxide
- An effective medium of H2O and low-pressure CO2 for the selective hydrogenation of aromatic nitro compounds to anilines