Catalytic properties of the Cr-HMS materials in the benzylation of benzene with benzyl chloride

Bachari, K.; Touileb, A.; Tahir, N.; Saadi, Abdelkrim; Halliche, D.; Cherifi, O.

doi:10.1134/s0023158411010022

Cited by 3 publications

(1 citation statement)

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“…Compared with MCM‐41 and SBA‐15, HMS has higher chemical and thermal stability as well as short channels and large textural mesoporosity which provide better mass transport channels for access to the active center . The silicate framework of mesoporous silica materials can be modified using many transition metals such as V, Ti, Fe, Cr, Co, Cu, etc., as the active center to increase the surface acidity, broaden the application range and improve the catalytic activity.…”

Section: Introductionmentioning

confidence: 99%

Iron promotion of V‐HMS mesoporous catalysts for ultra‐deep oxidative desulfurization

Liu

Zhao

Sun

et al. 2017

Applied Organom Chemis

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Bimetallic Fe‐V‐HMS (HMS, hexagonal mesoporous silica) catalysts with various molar ratios of iron to vanadium were synthesized using a co‐synthesis method, and investigated for oxidative desulfurization of dibenzothiophene (DBT) using tert‐butyl hydroperoxide as an oxidant. The catalysts were characterized using X‐ray diffraction, temperature‐programmed desorption of ammonia, Fourier transform infrared spectroscopy and N2 physical adsorption–desorption techniques. The Fe‐V‐HMS catalyst with a 2:1 molar ratio of iron to vanadium exhibited the highest total acidity and the highest catalytic activity. DBT was almost completely oxidized to dibenzothiophenesulfone, a species with a higher polarity that could be subsequently adsorbed on the Fe‐V‐HMS, and therefore the Fe‐V‐HMS acts as both a catalyst and an adsorbent simultaneously. The desulfurization rate was 98.1%. A pseudo‐first‐order model was fitted to the experimental data, and the activation energy was found to be 38.79 kJ mol−1. The encouraging performance of Fe‐V‐HMS offers the prospect of the design of a one‐pot oxidative desulfurization process without needing extraction of sulfones from fuel oil with a chemical solvent.

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Section: Introductionmentioning

confidence: 99%