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首页> 外文期刊>Catalysis science & technology >Promotion effect of Fe in mordenite zeolite on carbonylation of dimethyl ether to methyl acetate
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Promotion effect of Fe in mordenite zeolite on carbonylation of dimethyl ether to methyl acetate

机译：Fe在丁酸酯中Fe的促进作用对二甲基乙醚羰基化对乙酸甲酯的羰基的促进作用

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摘要

A series of Fe-modified mordenite zeolite samples were synthesized by a template-free method and employed in dimethyl ether (DME) carbonylation reaction for the production of methyl acetate (MAc). XRD, UV-Vis, and UV-Raman characterization studies proved that Fe atoms have been introduced into the mordenite zeolite framework by partial substitution of Al atoms, which led to evident changes of activity and MAc selectivity. With the increase of iron content (as metal) from 0.0 to 3.6 wt%, DME conversion first increased and then decreased. MAc selectivity and catalyst stability were enhanced for all Fe-modified samples. TG and GC-MS analysis of deactivated catalysts showed that the amount of coke retained in the catalysts decreased as the iron content of the zeolites increased. The enhancement effects were expounded in terms of the decrease of the acid strength and acid density in the 12MR channels of mordenite after introduction of Fe, resulting in the reduction of carbon deposition.
机译：通过无模板方法合成了一系列的Fe修饰的冬青石沸石样品，并用于二甲基醚（DME）羰基化反应中，用于生产乙酸甲酯（MAC）。 XRD，UV-VIS和UV-Raman表征研究证明，通过部分取代Al Atoms，已将Fe原子引入了MordeNite沸石框架中，从而导致了活动和MAC选择性的明显变化。 随着铁含量（金属）从0.0 wt％增加到3.6 wt％，DME转换首先增加然后减少。 对于所有FE修饰样品，MAC的选择性和催化剂稳定性均增强。 停用催化剂的TG和GC-MS分析表明，随着沸石的铁含量的增加，催化剂中保留的可乐量减少。 引入FE后，ard酸灰麻石的12MR通道中的酸强度和酸密度的降低，导致碳沉积减少，从而阐述了增强作用。

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