摘要
CO2作为氧化剂,不仅能促进有机物脱氢反应、避免深度氧化副反应,而且本身转化为CO,实现资源化利用。本文综述了CO2氧化有机物脱氢反应催化剂研究进展,并进行了平衡转化率计算,结果表明,文献报道的催化剂上反应物转化率与其平衡转化率尚有较大差距,因此,开发高活性催化剂仍是提高脱氢反应效率的主要方向;对CO2为氧化剂可能的正丁烯、环己烷、甲醇、5-羟甲基糠醛脱氢反应进行了热力学计算,结果表明,较单纯脱氢反应,加入CO2能显著提高平衡转化率;尤其是发现5-羟甲基糠醛脱氢制呋喃二甲醛反应,CO2加入打破了热力学限制,且可获得较高的平衡转化率,这对生物质平台分子5-羟甲基糠醛的高效利用具有重要指导意义。
As an oxidant,CO2 can not only promote the dehydrogenation of organic compounds and avoid the deep oxidation side reactions,but also itself be converted into CO to realize resource utilization.In this paper,the research progress of catalysts for the dehydrogenation of organic compounds by CO2 oxidation is reviewed,and the calculation of equilibrium conversion is carried out.The results show the actual conversions over most catalysts are still far from the equilibrium conversions.Therefore,the development of high activity catalysts is still the main direction to improve the dehydrogenation reactions.The thermodynamic analysis of CO2-oxidative dehydrogenation of n-butene,cyclohexane,methanol and 5-hydroxymethylfurfural(5-HMF)shows that the addition of CO2 can significantly improve the equilibrium conversion compared with the pure dehydrogenation;especially,it is found that the addition of CO2 breaks the thermodynamic limit and can obtain a higher equilibrium conversion in the reaction of dehydrogenation of 5-HMF to furan-2,5-dicarbaldehyde,which is beneficial to utilizing the biomass platform molecule 5-HMF.
作者
孙颖
丁晓墅
张洪起
赵新强
王延吉
SUN Ying;DING Xiao-shu;ZHANG Hong-qi;ZHAO Xin-qiang;WANG Yan-ji(Tianjin Key Laboratory of Intrinsic Safety Chemical Technology,School of Chemical Engineering and Technology,Hebei University of Technology,Tianjin 300130,China)
出处
《天然气化工—C1化学与化工》
CAS
CSCD
北大核心
2020年第3期37-44,共8页
Natural Gas Chemical Industry
基金
国家青年自然科学基金项目(21606070)
国家自然科学基金重点项目(21236001)
国家自然科学基金项目(21576069)。
关键词
有机物
催化剂
二氧化碳氧化剂
氧化脱氢
热力学分析
organic compounds
carbon dioxide oxidant
oxidative dehydrogenation
thermodynamic analysis
