微孔膜分离技术在甲醇催化剂制备中的应用研究  

Study on the application of microporous membrane separation technology in the preparation of methanol catalyst

作　　者：钱西江 QIAN Xijiang(SINOPEC Nanjing Research Institute of Chemical Industry Co.,Ltd.,Nanjing 210048,Jiangsu,China)

机构地区：[1]中石化南京化工研究院有限公司,江苏南京210048

出　　处：《能源化工》2024年第3期21-27,共7页Energy Chemical Industry

摘　　要：甲醇催化剂中钠离子含量过高会影响催化剂的活性及选择性,利用微孔膜分离技术对甲醇催化剂中铝胶载体进行洗涤脱钠。对洗涤过程中铝胶浓度、洗涤时间、用水量及膜孔径进行了研究,并利用XRD、氮气吸脱附、热重、H_(2)-TPR等分析手段对催化剂的晶体结构、表面性质、热稳定性等关键性能进行了分析。结果表明,经过膜洗涤的铝胶中钠离子质量浓度降低了93.9%,所得催化剂中钠离子质量分数降至489 mg/kg,催化剂活性中心CuO的晶粒度更小,比表面积、孔容和平均孔径更高。性能测试显示经分离膜脱钠处理的催化剂的初活性、耐热后活性以及选择性均高于未处理的催化剂,且其产出的粗甲醇中杂质含量更低。High sodium content in methanol catalyst will affect the activity and selectivity of the catalyst.The aluminum gel carrier of methanol catalyst is washed and desodified by microporous membrane separation technology.The concentration of aluminum glue,washing time,water consumption and membrane pore size during the washing process are explored,and the key properties of the catalyst such as crystal structure,surface properties and thermal stability are analyzed by XRD,nitrogen adsorption and desorption,thermogravimetry,H_2-TPR and other characterization methods.The results show that the sodium concentration in the aluminum glue after membrane washing is reduced by 93.9%,and the sodium mass fraction in the obtained catalyst is reduced to 489 mg/kg.The grain size of the active center CuO of the catalyst is smaller,and the specific surface area,pore volume and average pore size are higher.The performance test show that the initial activity,thermal activity and selectivity of the catalyst treated by the separation membrane are higher than those of the untreated catalyst,and the crude methanol produced by the catalyst has lower impurity content.

关 键 词：膜分离 脱钠 甲醇催化剂 活性 选择性 

分 类 号：TQ426.6[化学工程]