Hydroformylation of formaldehyde to glycolaldehyde(GA),as a vital reaction in both direct and indirect process of syngas to ethylene glycol(EG),shows great advantages in the aspects of the process complexity and clean...Hydroformylation of formaldehyde to glycolaldehyde(GA),as a vital reaction in both direct and indirect process of syngas to ethylene glycol(EG),shows great advantages in the aspects of the process complexity and clean production.The hydroformylation of formaldehyde to GA is thermodynamically unfavourable,requiring the development of highly efficient hydroformylation catalytic systems,appropriate reaction conditions and in-depth understanding of the reaction mechanisms.In this review,we have made a detailed summary on the reaction in terms of the reaction network,thermodynamics,metal complex catalysts(including central metals and ligands),reaction conditions(e.g.,temperature,pressure,formaldehyde source and solvent)and promoters.Furthermore,the reaction mechanisms,involving neutral and anionic complex in the catalytic cycle,have been summarized and followed by a discussion on the impact of the crucial intermediates on the reaction pathways and product distribution.A brief overview of product separation and catalyst recovery has been presented in the final part.This review gives new insights into the factors that impact on the formaldehyde hydroformylation and reaction mechanisms,which helps to design more efficient catalytic systems and reaction processes for EG production via the hydroformylation route.展开更多
从生命周期角度出发,对煤制乙二醇(coal to ethylene glycol,CTEG)路线和天然气制乙二醇(natural gas to ethylene glycol,NGTEG)路线进行全面的技术、碳排放与经济对比分析。结果表明,CTEG路线单位产品能耗是NGTEG路线的1.5倍,单位产...从生命周期角度出发,对煤制乙二醇(coal to ethylene glycol,CTEG)路线和天然气制乙二醇(natural gas to ethylene glycol,NGTEG)路线进行全面的技术、碳排放与经济对比分析。结果表明,CTEG路线单位产品能耗是NGTEG路线的1.5倍,单位产品碳排放是NGTEG路线的1.6倍。然而,CTEG路线具有较好的经济效益,利润与投资回报率分别比NGTEG路线高1499元/t和3.4%。通过分析原料、燃料和产品价格波动对2条路线经济竞争力的影响,发现CTEG路线受3种价格波动影响较小。CTEG路线具有良好的发展前景,但必须通过技术进步解决高能耗和高碳排放问题。展开更多
基金supported by the National Key Research and Development Program of China(2018YFA0704501).
文摘Hydroformylation of formaldehyde to glycolaldehyde(GA),as a vital reaction in both direct and indirect process of syngas to ethylene glycol(EG),shows great advantages in the aspects of the process complexity and clean production.The hydroformylation of formaldehyde to GA is thermodynamically unfavourable,requiring the development of highly efficient hydroformylation catalytic systems,appropriate reaction conditions and in-depth understanding of the reaction mechanisms.In this review,we have made a detailed summary on the reaction in terms of the reaction network,thermodynamics,metal complex catalysts(including central metals and ligands),reaction conditions(e.g.,temperature,pressure,formaldehyde source and solvent)and promoters.Furthermore,the reaction mechanisms,involving neutral and anionic complex in the catalytic cycle,have been summarized and followed by a discussion on the impact of the crucial intermediates on the reaction pathways and product distribution.A brief overview of product separation and catalyst recovery has been presented in the final part.This review gives new insights into the factors that impact on the formaldehyde hydroformylation and reaction mechanisms,which helps to design more efficient catalytic systems and reaction processes for EG production via the hydroformylation route.
文摘从生命周期角度出发,对煤制乙二醇(coal to ethylene glycol,CTEG)路线和天然气制乙二醇(natural gas to ethylene glycol,NGTEG)路线进行全面的技术、碳排放与经济对比分析。结果表明,CTEG路线单位产品能耗是NGTEG路线的1.5倍,单位产品碳排放是NGTEG路线的1.6倍。然而,CTEG路线具有较好的经济效益,利润与投资回报率分别比NGTEG路线高1499元/t和3.4%。通过分析原料、燃料和产品价格波动对2条路线经济竞争力的影响,发现CTEG路线受3种价格波动影响较小。CTEG路线具有良好的发展前景,但必须通过技术进步解决高能耗和高碳排放问题。
