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Techno-economic and exergy analysis of polygeneration plant for power and DME production with the integration of chemical looping CO_2/H_2O splitting

机译:用化学循环CO_2 / H_2O分裂集成电力和DME生产的技术经济和DME生产分析

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摘要

In this paper, we present a novel polygeneration plant with carbon capture for the combined power and dimethyl ether (DME) production. The plant layout integrates a chemical looping CO2/H2O splitting (CL) unit producing syngas (CO and H-2) for the DME synthesis using the exhaust gases of an oxyfuel power cycle. The primary power is generated by oxy-combustion of syngas generated by the reduction of the metal oxide in the reduction unit of the CL redox cycle with incoming natural gas. The oxyfuel power plant also generates steam for combined power production with two streams Rankine cycles. The aim of the present work is to assess the process on the basis of energy and exergetic efficiency and economic performance of the integrated CL unit for combined power and DME production. The integration proposed resulted in a production of 103 MWe and 185.6 ton/day (2.15 kg/s) of DME. The corresponding energy and exergetic efficiency was 50.2% and 45%, respectively. A discounted cash flow analysis was performed to evaluate the profitability of the process. With a carbon credit of $80/tonne, the plant would be able to meet the current electricity with carbon capture and DME prices of $50/MWh and $18/GJ respectively. The economic analysis provided information on the main economic drivers associated with the high capital investment in the process plant with individual sub-systems. The analysis highlighted the strong potential of integrating chemical looping CO2/H2O splitting for syngas production into polygeneration systems to increase the overall efficiency while reducing the cost of carbon capture.
机译:在本文中,我们提出了一种具有碳捕获的新型多种聚合物植物,用于组合功率和二甲醚(DME)生产。植物布局将化学环路CO2 / H2O分裂(CL)单元用于使用奥氧燃料循环的废气,为DME合成产生合成气(CO和H-2)。通过用进入的天然气的Cl氧化还原循环的还原单元中的金属氧化物减少而产生的合成气产生的初级功率。氧气燃料电厂还为组合电力生产产生了蒸汽,其中有两个溪流rankine周期。本作本作的目的是根据能源和综合电力单位的能源和前进效率和经济绩效来评估该过程,用于组合权力和DME生产。所提出的整合导致生产103mWe和185.6吨/天(2.15kg / s)的DME。相应的能量和前进效率分别为50.2%和45%。执行折扣现金流量分析以评估该过程的盈利能力。该工厂能够达到80美元/吨的碳学分,能够满足目前的电力,碳捕获和50美元/兆瓦的DME价格分别为18美元/ GJ。经济分析提供了有关与各个子系统的过程工厂高资本投资相关的主要经济司机的信息。分析突出了将化学环路CO2 / H2O分裂集成的强大潜力,将合成气生产成多元系统,以提高整体效率,同时降低碳​​捕获成本。

著录项

  • 来源
    《Energy Conversion & Management》 |2019年第4期|200-219|共20页
  • 作者单位

    Politecn Torino Energy Dept DENERG Corso Duca Abruzzi 24 I-10129 Turin Italy|Univ Politecn Cataluna EEBE Inst Energy Technol Dept Chem Engn Eduard Maristany 10-14 Barcelona 08019 Spain|Univ Politecn Cataluna EEBE Inst Energy Technol Barcelona Res Ctr Multiscale Sci & Engn Eduard Maristany 10-14 Barcelona 08019 Spain;

    Politecn Torino Energy Dept DENERG Corso Duca Abruzzi 24 I-10129 Turin Italy;

    Univ Coll Cork Sch Engn & Food Sci Environm Res Inst Marine & Renewable Energy Res MaREI Ctr Lee Rd Cork T23 XE10 Ireland;

    Politecn Torino Energy Dept DENERG Corso Duca Abruzzi 24 I-10129 Turin Italy;

    Univ Politecn Cataluna EEBE Inst Energy Technol Dept Chem Engn Eduard Maristany 10-14 Barcelona 08019 Spain|Univ Politecn Cataluna EEBE Inst Energy Technol Barcelona Res Ctr Multiscale Sci & Engn Eduard Maristany 10-14 Barcelona 08019 Spain;

    Politecn Torino Energy Dept DENERG Corso Duca Abruzzi 24 I-10129 Turin Italy;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    CO2/H2O splitting; Chemical looping; Polygeneration; Oxyfuel combustion; Dimethyl-ether (DME); Carbon capture;

    机译:CO2 / H2O分裂;化学循环;聚荷燃烧;二甲醚(DME);碳捕获;

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