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首页> 外文期刊>Catalysis science & technology >Development of mesopore-containing CON-type zeolite with unique acidic and catalytic properties
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Development of mesopore-containing CON-type zeolite with unique acidic and catalytic properties

机译：发展mesopore-containing CON-type沸石独特的酸性和催化属性

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摘要

The development of the mesoporosity of zeolite frameworks is an effective method to enhance the catalytic performance in the methanol-to-olefin reaction. Mesopore-containing CON-type boroaluminosilicate zeolite was prepared by the alkaline treatment based on the post-synthetic hydrothermal treatment in NH4OH solution containing cetyltrimethylammonium bromide. The change in the concentration of NH4OH solution led to CON zeolites with different mesopore volumes. The effects of the NH4OH concentration on the structural properties of the treated samples were investigated by XRD, N(2)adsorption, SEM, TEM, and(11)B,Al-27, and(29)Si MAS NMR analyses. In addition,in situFTIR with pyridine and 2,4,6-trimethylpyridine as probe molecules was applied to investigate the acidic properties. In the methanol-to-olefin (MTO) reaction, the mesopore-containing CON-type zeolite showed a longer catalytic life than the parent zeolite. The enhanced catalytic properties could be attributed to the dual effects of the alkaline treatment on the porosity and acidity modification.
机译：的发展中孔隙的沸石框架是一种有效的方法来提高methanol-to-olefin催化性能的反应。boroaluminosilicate沸石是准备的基于post-synthetic碱治疗摘要热液治疗方案包含cetyltrimethylammonium溴离子。摘要溶液的浓度变化与不同的中孔卷CON沸石。摘要选用浓度的影响结构对样本的属性调查XRD、N(2)吸附,SEM, TEM,(11) B、Al-27和(29)MAS核磁共振analyses。另外,在situFTIR吡啶和2、4、6-trimethylpyridine探针分子应用于研究酸性性质。methanol-to-olefin (MTO)反应,mesopore-containing CON-type沸石显示比父沸石催化寿命更长。增强的催化性能归因于碱性的双重影响治疗在孔隙度和酸度修改。

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