【学术视频】全国二氧化碳资源化利用学术会议 | 北海道大学Masahiko Arai教授
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图 | Masahiko Arai
题 目：Carbon dioxide as a chemical building block and a reaction promoter/controller
报告人：Masahiko Arai
单 位：Hokkaido University Sapporo, Japan
时 间：2019-11-10
地 点：南开大学
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报告摘要
Carbon dioxide is one of unsustainable substances that should be reduced or eliminated in the design, manufacture and use of chemical products. The utilization of CO₂ in synthetic reactions contributes to the design of green sustainable chemical processes and has been investigated so far for several chemical reactions of practical importance. A few examples using CO₂ as a chemical building block will be presented, such as the production of glycerol carbonate from glycerol and urea, in which glycerol is a byproduct in biomass conversion to fuels and urea is produced from CO₂, and the production of N, N-dimethylaniline via selective N-methylation of N-methylaniline by CO₂ and H₂. The glycerol carbonate production via urea is one of indirect CO₂ fixation reactions. Those reactions are multiphase reactions using conventional heterogeneous catalysts.
In addition to the role of CO₂ as a chemical building brock, it may act as a reaction promoter/controller in liquid phase reactions in spite of its inert nature. Some pressure is required for CO₂ to dissolve into the liquid phases, in which the dissolved CO₂ molecules may interact with reacting species (substrates, intermediates, catalysts), changing their reactivity, and the dissolution of CO₂ assists the dissolution of coexisting gaseous reactants like H₂ and O₂. The presence of dense phase CO₂ may enhance the reaction rate and control the product selectivity of the liquid phase reactions. A few examples will be presented, including selective hydrogenation of carbonyl, nitro, and nitrile compounds with conventional supported metal catalysts and hydrogen production via photocatalytic water splitting with titanium dioxide powder. In hydrogenation of nitrobenzene, for instance, the desired product of aniline is obtained in 100% selectivity at any conversion level in the presence of CO₂.
个人简介
Masahiko Arai教授，1974年本科毕业于日本东北大学，并分别于1976年、1979年获得日本东北大学工学硕士、工学博士学位。1979年至1986年任东北大学助教授；1986年至1999年任东北大学反应化学研究所副教授；2000年至今任北海道大学教授。曾历任北海道大学大学院工学研究科应用化学部主任，日本化学工学会北海道支部长。现任日本化工期刊和Journal of Supercritical fluids国际期刊的编委。其研究领域涉及绿色合成过程、超临界流体及超临界CO₂体系中的催化反应、环境催化、能源催化、二氧化碳固定、催化新材料的合成与原位表征等。
会议简介
由中国化学会主办，南开大学、中国化学会绿色化学专业委员会共同承办的两年一届的“中国化学会第一届全国二氧化碳资源化利用学术会议”于2019年11月8～10日在天津市南开大学举行。大会以二氧化碳化学领域的基础、应用和前沿问题为主题，主要围绕以下六个方面进行研讨：二氧化碳化学原理与应用（催化活化与催化剂设计）、二氧化碳定向转化的新反应/新途径/新方法、光化学催化反应、电催化方法、CO₂制备化学品/能源产品/聚合物、CO₂捕集与分离。
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