固定床催化剂成型工艺研究进展  

Research progress on molding process of catalysts for fixed bed reactor

作　　者：刘闪闪 丁其达 郭涛[2] 王耀锋 徐宝华 Shanshan LIU;Qida DING;Tao GUO;Yaofeng WANG;Baohua XU(School of Chemical Engineering,Zhengzhou University,Zhengzhou,Henan 450001,China;Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China;Zhengzhou Institute of Emerging Industrial Technology,Zhengzhou,Henan 450001,China)

机构地区：[1]郑州大学化工学院,河南郑州450001 [2]中国科学院过程工程研究所,北京100190 [3]郑州中科新兴产业技术研究院,河南郑州450001

出　　处：《过程工程学报》2023年第4期501-511,共11页The Chinese Journal of Process Engineering

基　　金：国家自然科学基金资助项目(编号:22078337);北京市自然科学基金资助项目(编号:2202054);郑州市高层次人才证书(编号:20180200052)。

摘　　要：催化技术的进步源自社会需求(如环境、能源、化学品、燃料等),其最终目标是在放大规模上提高工艺效率。成型催化剂通常是由活性相、载体和多种适于商业应用的成型添加剂构成的多组分毫米级物体。与粉末催化剂不同,成型催化剂除了具备粉末催化剂的催化活性外,还必须考虑黏合剂、润滑剂、酸以及致孔剂的使用应满足工况条件下的机械强度和化学稳定性的需要,以确保其在工业反应器中可以平稳运行同时具有长寿命。此外,成型催化剂的形状与尺寸通过影响反应器内部物料的流动状态,进而影响催化反应效果。因此,成型过程是复杂且充满挑战的。本工作介绍了固定床用催化剂成型工艺方面的研究进展,主要阐述了添加剂的种类、添加量、添加顺序、煅烧条件、浆料配比及成型催化剂的形状等因素对其力学性能以及催化性能的影响规律。此外,还介绍了Weibull分布在催化剂强度值可靠性判断及预测方面的应用,以及计算流体力学模拟在辅助催化剂形貌设计方面的进展,指出Weibull分布和计算流体力学在未来催化剂成型应用的潜力。The progresses obtained in the catalytic technology are driven by the social demands,such as environment,energy,chemicals,and fuels.The ultimate goal is to increase the process efficiency for scale-up.The molding catalysts are usually multicomponent material of millimetre-size consisting of the active phases,supports,and various molding additives suitable for commercial applications.Different from the powder catalysts,the molding catalysts should not only possess the catalytic activity of the powder catalyst but also consider the use of binder,lubricant,acid and pore-forming agent to satisfy the required mechanical strength and chemical stability to ensure that they can run smoothly and have a long life in industrial reactors.In addition,the shape and size of the molding catalysts affect the catalytic performance by affecting the flow state of the materials inside the reactor.Therefore,the molding process is complex and full of challenges.This review introduces the influence of molding conditions on both the mechanical and the catalytic properties at the fixed bed.Specifically,the effects of the types and amounts of additives,the addition sequence,the calcination conditions,the pulp ratio,and the shape and size of molding catalysts are focused.Weibull modulus can be used to measure the reliability of mechanical strength of brittle materials,and further judge and predict the reliability of catalyst strength value.In addition,this review also introduces the application of Weibull distribution in the reliability judgment and prediction of catalyst strength value,and the progress of computational fluid dynamics(CFD) simulation in assisting catalyst morphology design.The potential of Weibull distribution and CFD in future applications of molding catalyst are pointed out.

关 键 词：成型 机械强度 催化性能 WEIBULL分布 计算流体力学 

分 类 号：TQ426[化学工程]