摘要
乙醇催化脱氢制乙醛是实现煤基乙醇高效利用的关键技术路线之一,而高效催化剂,特别是铜基催化剂的开发是影响该技术产业化的核心。对乙醇催化脱氢制乙醛铜基催化剂的研究进行了综述,主要包括催化剂的载体种类(无载体、SiO_(2)、ZnO、ZrO_(2)、Al_(2)O_(3)和碳质)、前驱体种类、催化剂改性和催化剂制备方法等对催化剂性能的影响。其中,SiO_(2)和碳质是较为理想的载体,采用有机铜前驱体、K或C助剂改性和蒸氨法等手段制备的铜基催化剂性能较好。但是,目前报道的催化剂的寿命很难满足工业化要求,或者反应进料当中乙醇浓度较低(≤15%,体积分数)。针对上述问题,陕西延长石油(集团)有限责任公司和中国科学院兰州化学物理研究所合作开发了一种适用于纯乙醇进料的高效催化剂,催化剂寿命达到2600 h以上,具有良好的工业应用前景。
The catalytic dehydrogenation of ethanol to acetaldehyde is one of the key technological pathways for the efficient utilization of coal-based ethanol.The development of efficient catalysts,especially copper-based catalysts,plays a crucial role in influencing the industrialization of this technology.The researches on copper-based catalysts for the catalytic dehydrogenation of ethanol to acetaldehyde are summarized.This includes the types of catalyst supports(unsupported,SiO_(2),ZnO,ZrO_(2),Al_(2)O_(3),and carbon),precursor types,catalyst modification,and catalyst preparation methods,all of which have an impact on catalyst performance.Among them,SiO_(2)and carbon are considered ideal catalyst supports,and copper-based catalysts prepared using organic copper precursors,K or C additives,and ammonia evaporation method exhibit better performance.However,the catalysts’reported lifetimes currently fall short of industrial requirements,or the ethanol concentration in the feedstock is relatively low(≤15%,volume fraction).To address these issues,Shaanxi Yanchang Petroleum(Group)Co.,Ltd.and Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences jointly developed an efficient catalyst suitable for pure ethanol feeding,with a catalyst life of more than 2600 h,which has a good industrial application prospect.
作者
景旭亮
陈景
李鸿雄
孙育滨
杨东元
JING Xuliang;CHEN Jing;LI Hongxiong;SUN Yubin;YANG Dongyuan(Shaanxi Yanchang Petroleum(Group)Co.,Ltd.,Xi’an 710065,Shaanxi,China;Shaanxi Yanchang Petroleum(Group)Co.,Ltd.&Dalian Institute of Chemical Physics Xi’an Clean Energy(Chemical Industry)Research Institute,Xi’an 710065,Shaanxi,China)
出处
《低碳化学与化工》
CAS
北大核心
2023年第6期43-50,共8页
Low-Carbon Chemistry and Chemical Engineering
基金
陕西省重点研发计划(2021GY-120)
陕西省青年科技新星计划(2023KJXX-124)。
关键词
乙醇
乙醛
铜基催化剂
SiO_(2)载体
助剂
蒸氨法
ethanol
acetaldehyde
copper-based catalyst
SiO_(2)support
additives
ammonia evaporation method
