| 季东,杜知松,王东亮,董鹏,郭泳圻,边杰,李贵贤.Nd/HZSM-5分子筛催化苯与甲醇烷基化的研究[J].分子催化,2018,32(1):27-34 |
| Nd/HZSM-5分子筛催化苯与甲醇烷基化的研究 |
| Study on the Reaction of Benzene and Methanol by Nd/HZSM-5 Molecular Sieve |
| 投稿时间：2017-11-30 修订日期：2017-12-31 |
| DOI： |
| 中文关键词: Nd/HZSM-5 苯 甲醇 二甲苯 烷基化 |
| 英文关键词:Nd/HZSM-5 benzene methanol xylene alkylation |
| 基金项目:甘肃省科技支撑项目（1604GKCD026） |
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| 摘要点击次数: 2232 |
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| 中文摘要: |
| 采用稀土Nd盐溶液等体积浸渍法制备了Nd/HZSM-5催化剂，并采用BET、XRD、SEM、TG、FT-IR、NH3-TPD、ICP-AES表征手段对催化剂的孔道变化、结构、形貌、热稳定性、酸性及Nd负载量进行测试.在固定床单程管式微反应器上进行催化性能评价.结果表明，改性后分子筛颗粒尺寸减小、表面和孔道结构未发生改变、弱酸强度上升、热稳定性未发生变化，且Nd/HZSM-5催化剂在苯与甲醇烷基化反应中，在进料比1∶1、常压、温度380℃、反应时间3.0 h、质量空速MHSV=2.5 h-1、Nd负载量为1.35%、催化剂用量2.5 g的条件下，苯的转化率为74.14%，产物二甲苯的选择性和收率分别为57.96%和42.97%. |
| 英文摘要: |
| Nd/HZSM-5 catalyst was prepared by impregnation method using rare earth (Nd) saline solution. The channel change, structure, morphology, thermal stability, acid change and element (Nd) loading of catalyst were characterized by BET, XRD, SEM, TG,FT-IR NH3-TPD and ICP-AES. Evaluation of the catalytic effect of the molecular sieves was carried out by using a fixed bed single tube reactor. Experimental results showed that size of the modified molecular sieve particles decreased, no change of the surface and channel, grew up of the weak acid strength, not change of the thermal stability, even only in the reaction feed ratio 1:1, normal pressures, reaction temperature 380℃, reaction time 3.0 h, MHSV=2.5 h-1, 1.35% of Nd loaded and 2.5 g of catalyst were optimum conditions for the reaction efficiency of Nd/HZSM-5 catalyst. The conversion was benzene was up to 74.14%, the selectivity and yield of xylene were 57.96% and 42.97%, respectively. |
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