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    Simulations and Optimization of a Reduced CO2 Emission Process for Methanol Production Using Syngas from Bi-reforming

    Access Status
    Fulltext not available
    Authors
    Acquarola, Christopher
    Ao, Min
    Bhatelia, Tejas
    Prakash, Baranivignesh
    Faka, S.
    Pareek, Vishnu
    Shah, Milin
    Date
    2021
    Type
    Journal Article
    
    Metadata
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    Citation
    Acquarola, C. and Ao, M. and Bhatelia, T. and Prakash, B. and Faka, S. and Pareek, V. and Shah, M.T. 2021. Simulations and Optimization of a Reduced CO2 Emission Process for Methanol Production Using Syngas from Bi-reforming. Energy and Fuels. 35 (10): pp. 8844-8856.
    Source Title
    Energy and Fuels
    DOI
    10.1021/acs.energyfuels.1c00227
    ISSN
    0887-0624
    Faculty
    Faculty of Science and Engineering
    School
    WASM: Minerals, Energy and Chemical Engineering
    URI
    http://hdl.handle.net/20.500.11937/86649
    Collection
    • Curtin Research Publications
    Abstract

    A low CO2 emission process for methanol production using syngas generated by combined H2O and CO2 reforming with CH4 (bi-reforming) is proposed in this work. A detailed process model was developed using Aspen Plus. The operating conditions of the bi-reforming and methanol synthesis were derived from a detailed sensitivity analysis using plug flow reactor models with Langmuir-Hinshelwood-Hougen-Watson (LHHW) kinetics. A molar feed ratio of CH4:CO2:H2O of 1:1:2, instead of conventional 3:1:2 in the bi-reforming was found to be optimum and resulted in μ99% conversion of CH4, 44% conversion of CO2, and a H2/CO ratio of 1.78 at 910 °C and 7 bar. A higher methane conversion eliminated the need for cryogenic separation of CH4. The optimum feed ratio of 1:1:2 resulted in an μ33% higher consumption of CO2 per mole of CH4 required than the conventional process. An acid gas removal process using MDEA was used for CO2 separation, and a network of heat exchangers was configured for heat recovery. The proposed process resulted in μ0.37 tonne of CO2 per tonne of methanol, which is μ2-4 times lower than several published data and commercial methanol processes.

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