具有增强钼物种分散性及甲烷脱氢芳构化催化性能的氧化钼纳米带修饰的HMCM-49沸石
MoO Nanobelt-Modified HMCM-49 Zeolite with Enhanced Dispersion of Mo Species and Catalytic Performance for Methane Dehydro-Aromatization.
作者信息
Hu Jing, Li Yangyang, Wu Shujie, Wang Xiaohui, Xia Cai, Zhao Xinyu, Liu Jinglin
机构信息
Inner Mongolia Key Laboratory of Carbon Nanomaterials, College of Chemistry and Materials Science, Inner Mongolia Minzu University, Tongliao 028000, China.
Institute of Physical Chemistry, College of Chemistry, Jilin University, Changchun 130023, China.
出版信息
Molecules. 2022 Jul 9;27(14):4404. doi: 10.3390/molecules27144404.
The methane dehydro-aromatization reaction (MDA) is a promising methane valorization process due to the conversion of methane to value-added aromatics (benzene, toluene and naphthalene). However, one of the major disadvantages of utilizing zeolite in MDA is that the catalyst is rapidly inactivated due to coke formation, which eventually causes the activity and aromatic selectivity to decrease. Consequently, the process is not conducive to large-scale industrial applications. The reasonable control of Mo site distribution on the zeolite surface is the key factor for partially inhibiting the coking of the catalyst and improving stability. Here, MoO nanobelts can be used for alternative Mo precursors to prepare MDA catalysts. Catalysts modified with MoO nanobelts present higher activity (13.4%) and benzene yield (9.2%) than those catalysts loaded with commercial MoO.
甲烷脱氢芳构化反应（MDA）是一种很有前景的甲烷增值工艺，因为它能将甲烷转化为增值芳烃（苯、甲苯和萘）。然而，在MDA中使用沸石的一个主要缺点是，催化剂会因积炭而迅速失活，最终导致活性和芳烃选择性降低。因此，该工艺不利于大规模工业应用。合理控制沸石表面Mo位点的分布是部分抑制催化剂结焦并提高稳定性的关键因素。在此，MoO纳米带可作为替代的Mo前驱体来制备MDA催化剂。用MoO纳米带改性的催化剂比负载商业MoO的催化剂具有更高的活性（13.4%）和苯产率（9.2%）。
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