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首页> 外文期刊>Environmental Science & Technology >Efficient Utilization of Greenhouse Gases in a Gas-to-Liquids Process Combined with CO_2/Steam-Mixed Reforming and Fe-Based Fischer-Tropsch Synthesis
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Efficient Utilization of Greenhouse Gases in a Gas-to-Liquids Process Combined with CO_2/Steam-Mixed Reforming and Fe-Based Fischer-Tropsch Synthesis

机译：结合CO_2 /蒸汽混合重整和铁基费托合成的气液过程中温室气体的有效利用

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摘要

Two process models for carbon dioxide utilized gas-to- liquids (GTL) process (CUGP) mainly producing light olefins and Fischer-Tropsch (F-T) synthetic oils were developed by Aspen Plus software. Both models are mainly composed of a reforming unit, an F- T synthesis unit and a recycle unit, while the main difference is the feeding point of fresh CO_2. In the reforming unit, CO_2 reforming and steam reforming of methane are combined together to produce syngas in flexible composition. Meanwhile, CO_2 hydrogenation is conducted via reverse water gas shift on the Fe-based catalysts in the F-T synthesis unit to produce hydrocarbons. After F-T synthesis, the unreacted syngas is recycled to F-T synthesis and reforming units to enhance process efficiency. From the simulation results, it was found that the carbon efficiencies of both CUGP options were successfully improved, and total CO_2 emissions were significantly reduced, compared with the conventional GTL processes. The process efficiency was sensitive to recycle ratio and more recycle seemed to be beneficial for improving process efficiency and reducing CO_2 emission. However, the process efficiency was rather insensitive to split ratio (recycle to reforming unit/total recycle), and the optimum split ratio was determined to be zero.
机译：通过Aspen Plus软件开发了两种主要用于生产轻质烯烃和费-托合成油的气-液（GTL）二氧化碳工艺方法（CUGP）。两种模型主要由重整单元，FT合成单元和再循环单元组成，而主要区别在于新鲜CO_2的进料点。在重整单元中，将CO_2重整和甲烷的蒸汽重整结合在一起以生产具有灵活组成的合成气。同时，通过在F-T合成单元中的Fe基催化剂上通过反向水煤气变换进行CO_2加氢以产生烃。 F-T合成后，未反应的合成气被循环到F-T合成和重整单元，以提高工艺效率。从模拟结果可以发现，与常规GTL工艺相比，两种CUGP选件的碳效率都得到了成功提高，并且总CO_2排放量显着降低。工艺效率对再循环比敏感，更多的再循环似乎对提高工艺效率和减少CO_2排放是有益的。然而，工艺效率对分流比（对重整单元的循环/总循环）相当不敏感，并且确定最佳分流比为零。

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  • 来源
    《Environmental Science & Technology》 |2014年第14期|8251-8257|共7页
  • 作者

    Chundong Zhang; Ki-Won Jun; Kyoung-Su Ha; Yun-Jo Lee; Seok Chang Kang;

  • 作者单位

    Research Center for Green Catalysis, Korea Research Institute of Chemical Technology (KRICT), Yuseong, Daejeon 305-600, Republic of Korea,Green Chemistry and Environmental Biotechnology, School of Science, Korea University of Science and Technology (UST), Yuseong, Daejeon 305-333, Republic of Korea;

    Research Center for Green Catalysis, Korea Research Institute of Chemical Technology (KRICT), Yuseong, Daejeon 305-600, Republic of Korea,Green Chemistry and Environmental Biotechnology, School of Science, Korea University of Science and Technology (UST), Yuseong, Daejeon 305-333, Republic of Korea;

    Research Center for Green Catalysis, Korea Research Institute of Chemical Technology (KRICT), Yuseong, Daejeon 305-600, Republic of Korea,Department of Chemical and Biomolecular Engineering, Sogang University, Mapo, Seoul 121-742, Korea;

    Research Center for Green Catalysis, Korea Research Institute of Chemical Technology (KRICT), Yuseong, Daejeon 305-600, Republic of Korea;

    Research Center for Green Catalysis, Korea Research Institute of Chemical Technology (KRICT), Yuseong, Daejeon 305-600, Republic of Korea;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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