| MgO/HZSM-5上甲苯与碳酸二甲酯择形烷基化反应性能的研究 |
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| 引用本文： | 张宇,薛冰,许杰,李永昕. MgO/HZSM-5上甲苯与碳酸二甲酯择形烷基化反应性能的研究[J]. 精细石油化工, 2011, 28(2): 17-21 |
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| 作者姓名： | 张宇 薛冰 许杰 李永昕 |
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| 作者单位： | 常州大学石油化工学院,江苏,常州,213164 |
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| 摘 要： | 实验以MgO/HZSM-5为催化剂,在气相连续流动固定床反应器上进行甲苯与碳酸二甲酯(DMC)择形烷基化反应的研究.采用等体积浸渍法制备了一系列MgO/HzsM-5催化剂,并采用XRD、NH<,3>-TPD、吡啶吸附IR、N<,2>吸附-脱附等手段对催化剂进行表征.考察了MgO负载量及反应条件对催化性能的影响.结果表明...
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| 关 键 词： | HZSM-5分子筛 甲苯 碳酸二甲酯 对二甲苯 烷基化 |
STUDIES ON SHAPE-SELECTIVITY OF ALKYLATION OF TOLUENE WITH DIMETHYL CARBONATE OVER MgO/HZSM-5 CATALYSTS |
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| Zhang Yu,Xue Bing,Xu Jie,Li Yongxin. STUDIES ON SHAPE-SELECTIVITY OF ALKYLATION OF TOLUENE WITH DIMETHYL CARBONATE OVER MgO/HZSM-5 CATALYSTS[J]. Speciality Petrochemicals, 2011, 28(2): 17-21 |
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| Authors: | Zhang Yu Xue Bing Xu Jie Li Yongxin |
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| Affiliation: | Zhang Yu,Xue Bing,Xu Jie and Li Yongxin (Institute of Petrochemical Technology,Changzhou University,Changzhou 213164,Jiangsu,China) |
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| Abstract: | MgO/HZSM-5 catalysts prepared by an incipient wet impregnation method have been tested for the synthesis of p-xylene by alkylation of toluene with dimethyl carbonate(DMC) using a fix-bed reactor.Several techniques such as XRD,N_2 adsorption-desorption,NH_3-TPD,pyridine-IR,etc were applied to characterize the structure and acidic properties of the catalysts.The characterization results showed that the alkylation of toluene with DMC occurred mainly on Br(?)nsted acid sites.The effects of MgO loading amounts and reaction conditions on the catalytic performance have also been investigated. Catalytic tests indicated that,with the increase of the loading amounts of MgO,the conversion of toluene decreased while the selectivity to p-xylene increased dramatically.The best catalytic performance was obtained over the 9%MgO/HZSM-5 catalyst at 380℃with a ratio of toluene to DMC of 4: 1,affording a remarkable p-xylene selectivity of 51.2%. |
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| Keywords: | HZSM-5 zeolite toluene dimethyl carbonate p-xylene alkylation |
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