摘要
二氧化碳排放控制和化学利用是全世界科学家面临的难题。人们已提出利用物理和生物方法来解决二氧化碳问题，但对二氧化碳这样一个巨大的碳资源，还没有特别有效的化学利用方法。在这方面，前人曾考虑过非均相催化。但非均相催化能耗大，而氢源紧缺；以及二氧化碳本身非常稳定，需高温激活，而高温又导致催化剂寿命很有限，很难达到工业化要求。而冷等离子体，包括各种气体放电现象，其某些作用方式类似于常规催化，但在低温高效激活二氧化碳方面更有效率。本文详细讨论了等离子体二氧化碳化学固定化的各种方法，包括直接法和间接法，并比较了等离子体法与常规催化方法的区别。讨论的物系包括：Ｈ２／ＣＯ２、ＣＨ４／ＣＯ２。
Emission control and chemical utilization of carbon dioxide has been a challenge for scientists all over the world.Although some physical and biological techniques have found their way in carbon dioxide fixation,there is still no proven technology for chemical utilization of such a plentiful carbon source.Heterogeneous catalysis has been considered to be a desirable route for carbon dioxide utilization.However,there are some difficulties in energy consumption,in availability of hydrogen source,in activating carbon dioxide and prolonging catalyst life with conventional catalytic reactions.Gas discharges behave in a similar way as regular catalysis in the activation of reactants but are more effective and efficient in the generation of radical species.In this review,the present state of carbon dioxide utilization via gas discharges is discussed,including the indirect and direct co
出处
《燃烧科学与技术》
EI
CAS
CSCD
1999年第2期128-140,共13页
Journal of Combustion Science and Technology
关键词
二氧化碳
化学固定化
等离子体
废气利用
Carbon Dioxide,Chemical Fixation,Plasmanversion of carbon dioxide to more valuable hydrocarbons with the discharge systems of H2+CO2,CH4+CO2,H2O+CO2 and H2S+CO2.Various plasma phenomena and their applications in chemical utilizati
