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首页> 外文期刊>RSC Advances >Enhanced selectivity in the conversion of glycerol to pyridine bases over HZSM-5/11 intergrowth zeolite
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Enhanced selectivity in the conversion of glycerol to pyridine bases over HZSM-5/11 intergrowth zeolite

机译：与HZSM-5 / 11共生沸石相比，甘油转化为吡啶碱的选择性提高

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摘要

A composite co-crystalline zeolite HZSM-5/11(78) was synthesized and tested in the conversion of glycerol with ammonia to pyridine bases (pyridine, 2-methylpyridine, 3-methylpyridine). The HZSM-5/11(78) showed good performance compared to other zeolites with similar Si/Al ratios such as HZSM-5(80), HZSM-11(80) and the physical mixture of HZSM-5(80) and HZSM-11(80). Characterization results from the N2 adsorption–desorption and IR of the adsorbed pyridine indicated that the good performance of HZSM-5/11(78) was related to the higher surface area and co-existence of an appropriate ratio of Lewis and Br?nsted sites, which are derived from the intergrowth between zeolites HZSM-5 and HZSM-11. The parameters affecting the catalytic performance of HZSM-5/11(78) were investigated systematically. The optimal conditions for producing pyridine bases from glycerol with ammonia over this catalyst were determined, including a reaction temperature of 520 °C, 0.1 MPa pressure with a molar ratio of ammonia to glycerol of 12?:?1, and a GHSV of 300 h?1.
机译：合成了复合共晶沸石HZSM-5 / 11（78），并进行了甘油与氨向吡啶碱（吡啶，2-甲基吡啶，3-甲基吡啶）的转化试验。与其他具有类似Si / Al比的沸石如HZSM-5（80），HZSM-11（80）以及HZSM-5（80）和HZSM的物理混合物相比，HZSM-5 / 11（78）表现出良好的性能-11（80）。 N 2 吸附-吡啶的吸附-解吸和IR表征结果表明，HZSM-5 / 11（78）的良好性能与较高的表面积有关和适当比例存在的Lewis和Br？nsted位点并存，这些位点是由HZSM-5和HZSM-11沸石之间的共生作用产生的。系统研究了影响HZSM-5 / 11（78）催化性能的参数。确定了在该催化剂上由甘油和氨生产吡啶碱的最佳条件，包括反应温度为520°C，压力为0.1 MPa，氨与甘油的摩尔比为12？：？1，GHSV为300 h ？1 。

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