Abstract

Hierarchical ZSM-11 and Zn-ZSM-11 catalysts were used in this study. The effects of two methods (direct synthesis and impregnation) of zinc incorporation on methanol conversion were investigated in a continuous-flow isotherm fixed-bed reactor. XRD, SEM, BET, FTIR, and XRF analytical results revealed that the introduction of zinc through direct synthesis generated new Brønsted acid sites that could tune the ratio of light olefins. The damage to the framework structure after zinc incorporation restrained the aromatization, dehydrogenation, and decomposition of methanol. The extent of this impact determined the degree of deactivation behaviors. Thus, the yield of propene and butene was enhanced through the direct synthesis method (2 % ZnZ11-C, 4 % ZnZ11-C), and the sample 4 % ZnZ11-C displayed a fast deactivation.

Graphical Abstract

中文翻译：

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锌掺入对分级ZSM-11甲醇转化催化剂的影响。

抽象的

本研究使用分层ZSM-11和Zn-ZSM-11催化剂。在连续流等温固定床反应器中研究了锌掺入两种方法（直接合成和浸渍）对甲醇转化率的影响。XRD，SEM，BET，FTIR和XRF分析结果表明，通过直接合成引入锌会产生新的布朗斯台德酸位点，从而可以调节轻烯烃的比例。锌掺入后对骨架结构的破坏抑制了甲醇的芳构化，脱氢和分解。这种影响的程度决定了停用行为的程度。因此，通过直接合成方法（2％ZnZ11-C，4％ZnZ11-C）提高了丙烯和丁烯的收率，样品4％ZnZ11-C表现出快速失活。

图形概要