Bioethanol used in Alkylation of Benzene over Modified ZSM-5 Catalysts with Nd and Pr

Theoretical Investigation of Benzene Alkylation with Ethene over H-ZSM-5

Benzene alkylation with ethene over zeolite H-ZSM-5 has been investigated using density functional theory. Three different reaction mechanismsstwo one-step schemes and one two-step schemeshave been studied on three cluster models of increasing size representing parts of the H-ZSM-5 framework. In the one-step schemes ethene protonation and C-C bond formation occur simultaneously. The two-step sc...

Application of GA in Optimization of Modified Benzene Alkylation Process

A genetic algorithm is used to optimize the modified benzene alkylation process. Based on the previous studies, the modified process increases ethylbenzene selectivity and decreases energy consumption at the same time. The inlet ethylene flow rate of each alkylation reactor is optimized in order to reduce the chance of transalkylation reactions but increase ethylbenzene selectivity. The byprodu...

Stable Fe/ZSM-5 Nanosheet Zeolite Catalysts for the Oxidation of Benzene to Phenol

Fe/ZSM-5 nanosheet zeolites of varying thickness were synthesized with di- and tetraquaternary ammonium structure directing agents and extensively characterized for their textural, structural, and catalytic properties. Introduction of Fe3+ ions in the framework of nanosheet zeolites was slightly less effective than in bulk ZSM-5 zeolite. Steaming was necessary to activate all catalysts for N2O ...

Continuous selective oxidation of methane to methanol over Cu - and Fe - modified ZSM - 5 catalysts in a flow reactor

The selective oxidation of methane to methanol is a key challenge in catalysis. Iron and copper modified ZSM-5 catalysts are shown to be effective for this reaction using H2O2 as the oxidant under continuous flow operation. Co-impregnation of ZSM-5 with Fe and Cu by chemical vapour impregnation yielded catalysts that showed high selectivity to methanol (> 92% selectivity, 0.5 % conversion), as ...

Dehydration of Methanol to Dimethyl Ether Employing Modified H-ZSM-5 Catalysts