Catalytic performance of desilicated HZSM-12 for benzylation reaction of benzene with benzyl alcohol

IF 1 4区 工程技术 Q4 CHEMISTRY, APPLIED Chemical Industry & Chemical Engineering Quarterly Pub Date : 2023-01-01 DOI:10.2298/ciceq220620006a
S. Akyalcin, L. Akyalçın, M. Bjørgen
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Abstract

The catalytic production of diphenylmethane from the reaction of benzene with benzyl alcohol was investigated using HZSM-12 and desilicated HZSM-12 that was obtained by treating ZSM-12 with 0.2M NaOH solution at 85?C for 60 min. The untreated and alkaline treated ZSM-12 zeolites were characterized by X-ray diffraction, nitrogen adsorption/desorption isotherms, scanning electron microscopy, inductively coupled plasma optical emission spectrometry, and temperature-programmed desorption of ammonia. The desilicated HZSM-12 showed promising catalytic performance with benzyl alcohol conversion of 100 %, selectivity to diphenylmethane of 74 % (in 4 h reaction time), and that of 87 % (in 8 h reaction time). The reaction parameters affecting benzyl alcohol conversion and product distribution were also presented. The activities of fresh and regenerated catalysts were compared and characterization results indicated that the occluded organic molecules decreased the number of acidic sites of the catalyst after the reaction and regeneration.
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脱硅HZSM-12对苯与苯醇苄化反应的催化性能
用HZSM-12和用0.2M NaOH溶液在85℃下处理得到的脱硅HZSM-12,研究了苯与苯醇反应催化生成二苯基甲烷。采用x射线衍射、氮吸附/解吸等温线、扫描电镜、感应耦合等离子体发射光谱和程序升温解吸氨对未处理和碱性处理的ZSM-12沸石进行了表征。脱硅后的HZSM-12具有良好的催化性能,对苯甲醇的转化率为100%,对二苯甲烷的选择性为74%(反应时间为4 h),对二苯甲烷的选择性为87%(反应时间为8 h)。研究了影响苯甲醇转化和产物分布的工艺参数。比较了新鲜催化剂和再生催化剂的活性,表征结果表明,封闭的有机分子减少了催化剂在反应和再生后的酸性位点数量。
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来源期刊
Chemical Industry & Chemical Engineering Quarterly
Chemical Industry & Chemical Engineering Quarterly CHEMISTRY, APPLIED-ENGINEERING, CHEMICAL
CiteScore
2.10
自引率
0.00%
发文量
24
审稿时长
3.3 months
期刊介绍: The Journal invites contributions to the following two main areas: • Applied Chemistry dealing with the application of basic chemical sciences to industry • Chemical Engineering dealing with the chemical and biochemical conversion of raw materials into different products as well as the design and operation of plants and equipment. The Journal welcomes contributions focused on: Chemical and Biochemical Engineering [...] Process Systems Engineering[...] Environmental Chemical and Process Engineering[...] Materials Synthesis and Processing[...] Food and Bioproducts Processing[...] Process Technology[...]
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