两种工业甲醇合成催化剂失活原因对比分析  

Comparative analysis of deactivation causes of two industrial methanol synthesis catalysts

作　　者：武燕娟 张凡 雍晓静 徐晓颖 邢爱华 WU Yanjuan;ZHANG Fan;YONG Xiaojing;XU Xiaoying;XING Aihua(Institute of Coal Chemical Industry Technology of Ningxia Coal Industry Co.,Ltd.,China National Energy Group,Yinchuan 750411,Ningxia,China;National Institute of Clean-and-Low-Carbon Energy,China National Energy Group,Beijing 102211,China)

机构地区：[1]国家能源集团宁夏煤业有限责任公司煤炭化学工业技术研究院,宁夏银川750411 [2]北京低碳清洁能源研究院,北京102211

出　　处：《低碳化学与化工》2024年第6期17-23,共7页Low-Carbon Chemistry and Chemical Engineering

基　　金：国家能源集团项目(ST930023003N)。

摘　　要：甲醇合成催化剂失活是导致甲醇合成装置停车的重要因素之一,严重影响生产企业的经济效益。对来自两种甲醇工厂的催化剂样品进行了表征分析,包括X射线荧光光谱、X射线衍射、红外光谱、物理吸附和电感耦合等离子体发射光谱等,以探究其失活原因。结果表明,经过约两年的工业使用,催化剂出现了径向强度减小、粉化、铜晶粒尺寸增大、比表面积下降和有害杂质元素(硫和铁)富集的现象。失活催化剂中铜晶粒尺寸最大可达32.72 nm,相应的比表面积由102.3 m^(2)/g下降到最低16.0 m^(2)/g,硫和铁元素含量(质量分数)由小于0.05%和362×10^(-6)分别增加至最高0.36%和2629×10^(-6)。两个工厂采集的催化剂表现出不同的失活特征,需要采取有针对性的措施延长催化剂使用寿命。The deactivation of methanol synthesis catalysts is one of the important factors leading to the shutdown of methanol synthesis units,which seriously affects the economic benefits of production enterprises.Characterization analysis was conducted on catalyst samples from two methanol factories to investigate the reasons for their deactivation,including X-ray fluorescence spectroscopy,X-ray diffraction,infrared spectroscopy,physical adsorption and inductively coupled plasma emission spectroscopy.The results show that after about two years of industrial use,the catalysts exhibite phenomena such as decreased radial strength,pulverization,increased copper grain size,decreased specific surface area and enrichment of harmful impurity elements(sulfur and iron).The maximum grain size of copper in the deactivated catalyst can reach 32.72 nm,and the corresponding specific surface area decreases from 102.3 m^(2)/g to the lowest 16.0 m^(2)/g.The sulfur and iron contents(mass fraction)increase from less than 0.05%and 362×10^(-6) to the highest 0.36% and 2629×10^(-6),respectively.The catalysts collected from two factories exhibit different deactivation characteristics,and targeted measures need to be taken to extend the service life of the catalysts.

关 键 词：甲醇 催化剂 失活 铜晶粒 

分 类 号：TQ426[化学工程]