System assessment of integrating calcium looping and chemical loopinghydrogen generation processes for cement plants decarbonization

HE Song, WANG Dan, ZHENG Yawen, et al. System assessment of integrating calcium looping and chemical looping hydrogen generation processes for cement plants decarbonization[J].Clean Coal Technology,2024,30(12):180−191.

Zero-carbon fuel substitution and CO2 capture will play a crucial role in the decarbonization of cement plants. This paperproposes an integration scheme that combines the calcium looping process with the chemical looping hydrogen generation process (CaL-CLHG). The CaL-CLHG scheme offers the advantage of recovering waste heat from the cement production process for hydrogengeneration. Besides, the CaL-CLHG scheme avoids the power consumption associated with air separation in the traditional calciumlooping process (CaL-Oxy). Results indicate that the specific primary energy consumption for CO2 avoided can be achieved at 2.68 GJ/tin the CaL-CLHG scheme. This represents a reduction of 33.5% compared to the CaL-Oxy scheme. Economic analysis indicates that thecost of CO2 avoided can be reduced from 56.6 $/t in the CaL-Oxy scheme to the range of 34.2-41.6 $/t in the CaL-CLHG scheme. Inconclusion,adopting the CaL-CLHG process for the decarbonization of existing cement plants presents a techno-economically feasibleoption.

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System assessment of integrating calcium looping and chemical loopinghydrogen generation processes for cement plants decarbonization

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