SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2021, Vol. 35 ›› Issue (7): 163-172.DOI: 10.1016/j.cjche.2020.07.052

• Separation Science and Engineering • 上一篇    下一篇

Multi-technique integration separation frameworks after steam reforming for coal-based hydrogen generation

Xuehua Ruan1,2, Wenbo Huo1, Jiaming Wang1, Minggang Guo1, Wenji Zheng1, Yun Zou3, Aibin Huang2, Jianxiang Shou2, Gaohong He1   

  1. 1. State Key Laboratory of Fine Chemicals, Engineering Research Center for VOC Control & Reclamation, School of Chemical Engineering at Panjin, Dalian University of Technology, Panjin 124221, China;
    2. SINOPEC Zhenhai Refining and Chemical Company, Ningbo 315207, China;
    3. Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, Guangxi University, Nanning 530004, China
  • 收稿日期:2020-03-06 修回日期:2020-07-14 出版日期:2021-07-28 发布日期:2021-09-30
  • 通讯作者: Gaohong He
  • 基金资助:
    The authors acknowledge the financial supports from the National Natural Science Foundation of China (Grant No. 21978033, U1663223 & 21978035), China Postdoctoral Science Foundation (2019M650055), Liaoning Province Funds (XLYC1907063), the Changjiang Scholars Program (T2012049), the Fundamental Research Funds for the Central Universities (DUT19TD33), and the Opening Project of Guangxi Key Laboratory of Petrochemical Resource Processing & Process Intensification Technology (2018K009).

Multi-technique integration separation frameworks after steam reforming for coal-based hydrogen generation

Xuehua Ruan1,2, Wenbo Huo1, Jiaming Wang1, Minggang Guo1, Wenji Zheng1, Yun Zou3, Aibin Huang2, Jianxiang Shou2, Gaohong He1   

  1. 1. State Key Laboratory of Fine Chemicals, Engineering Research Center for VOC Control & Reclamation, School of Chemical Engineering at Panjin, Dalian University of Technology, Panjin 124221, China;
    2. SINOPEC Zhenhai Refining and Chemical Company, Ningbo 315207, China;
    3. Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, Guangxi University, Nanning 530004, China
  • Received:2020-03-06 Revised:2020-07-14 Online:2021-07-28 Published:2021-09-30
  • Contact: Gaohong He
  • Supported by:
    The authors acknowledge the financial supports from the National Natural Science Foundation of China (Grant No. 21978033, U1663223 & 21978035), China Postdoctoral Science Foundation (2019M650055), Liaoning Province Funds (XLYC1907063), the Changjiang Scholars Program (T2012049), the Fundamental Research Funds for the Central Universities (DUT19TD33), and the Opening Project of Guangxi Key Laboratory of Petrochemical Resource Processing & Process Intensification Technology (2018K009).

摘要: Coal-based H2 generation has abruptly increased in recent years. The PSA-VPSA-SC process is the matured and standard framework for H2 purification and CO2 capture in many existing plants, including normal and vacuum pressure swing adsorption units in series (PSA-VPSA), and shallow condensation unit (SC). However, this standard process is frequently subjected to low H2 recovery ratio and high purification cost. In this work, H2-selective and CO2-selective membrane units, i.e., HM and CO2M, are attempted to support the standard process and ameliorate constraints. In the beginning, HM unit is arranged after VPSA to enhance H2 recovery from the decarbonized stream, i.e., the PSA-VPSA-SC/HM process. As a result, H2 recovery ratio can be enhanced significantly from 83% to 98%. In the following, VPSA is replaced with CO2M unit to reduce investment and operation cost, i.e., the PSA-CO2M-SC/HM process. Accordingly, the specific purification cost is diminished from 33.46 to 32.02 USD·(103m3 H2)-1, saved by 4.3%, meanwhile the construction cost is falling back and just a little higher than that for the standard process. In the end, another CO2M unit is launched before PSA, i.e., the CO2M-PSA-CO2M-SC/HM process, which could unbundle CO2 enrichment partially from H2 purification, and then save more investment and operation cost. In comparison with the standard process, this ultimate retrofitted process can be superior in all the three crucial indices, i.e., recovery ratio, investment, and specific purification cost. On the whole, coal-based H2 generation can be ameliorated significantly through high efficient H2-selective and CO2-selective membrane units.

关键词: Hydrogen production, Separation, Membranes, Process framework, H2-selectivemembrane, CO2-selectivemembrane

Abstract: Coal-based H2 generation has abruptly increased in recent years. The PSA-VPSA-SC process is the matured and standard framework for H2 purification and CO2 capture in many existing plants, including normal and vacuum pressure swing adsorption units in series (PSA-VPSA), and shallow condensation unit (SC). However, this standard process is frequently subjected to low H2 recovery ratio and high purification cost. In this work, H2-selective and CO2-selective membrane units, i.e., HM and CO2M, are attempted to support the standard process and ameliorate constraints. In the beginning, HM unit is arranged after VPSA to enhance H2 recovery from the decarbonized stream, i.e., the PSA-VPSA-SC/HM process. As a result, H2 recovery ratio can be enhanced significantly from 83% to 98%. In the following, VPSA is replaced with CO2M unit to reduce investment and operation cost, i.e., the PSA-CO2M-SC/HM process. Accordingly, the specific purification cost is diminished from 33.46 to 32.02 USD·(103m3 H2)-1, saved by 4.3%, meanwhile the construction cost is falling back and just a little higher than that for the standard process. In the end, another CO2M unit is launched before PSA, i.e., the CO2M-PSA-CO2M-SC/HM process, which could unbundle CO2 enrichment partially from H2 purification, and then save more investment and operation cost. In comparison with the standard process, this ultimate retrofitted process can be superior in all the three crucial indices, i.e., recovery ratio, investment, and specific purification cost. On the whole, coal-based H2 generation can be ameliorated significantly through high efficient H2-selective and CO2-selective membrane units.

Key words: Hydrogen production, Separation, Membranes, Process framework, H2-selectivemembrane, CO2-selectivemembrane