挤条成型合成气一步法制二甲醚双功能催化剂的研究

发布时间：2018-02-26 03:04

  本文关键词： 合成气 二甲醚 双功能催化剂 挤条成型　出处：《天然气化工(C1化学与化工)》2016年06期 　论文类型：期刊论文

【摘要】：选择Cu/Zn/Al_2O_3和拟薄水铝石,同时添加助剂,采用挤条法成型合成气一步法制备二甲醚的双功能催化剂,通过对催化剂进行强度测试、表征和性能评价,确定了最佳的催化剂制备条件为:Cu/Zn/Al_2O_3与拟薄水铝质量比1∶1,胶溶剂硝酸质量分数为4%,助挤剂质量分数柠檬酸为5%、田菁粉为2.5%,用水量与原料粉体的质量比为0.60。在此条件下制备的催化剂,其强度可达153N/cm,在250℃、3MPa、2500m L/(g·h)的条件下,催化剂CO转化率为79.8%,二甲醚的选择性为49.1%,甲醇的选择性为15.2%。
[Abstract]:Cu/Zn/Al_2O_3 and pseudo-boehmite were selected to prepare dimethyl ether (DME) bifunctional catalyst by one-step extrusion of syngas by adding auxiliary agent. The strength of the catalyst was tested, characterized and its performance evaluated. The optimum conditions for the preparation of the catalyst are as follows: 1: 1 mass ratio of W / Cu / Zn / Al _ 2O _ 3 to Al _ 2O _ 3 / Al _ 2O _ 3, mass fraction of nitric acid in colloid solvent is 4%, mass fraction of squeezing agent is 5%, mass fraction of Sesbania powder is 2.5%, mass ratio of water consumption to raw material powder is 0.60. Catalyst prepared under the. The strength of the catalyst can reach 153N / cm. At 250 鈩，

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