System assessment of integrating calcium looping and chemical looping hydrogen generation processes for cement plants decarbonization
Zero-carbon fuel substitution and CO2 capture will play a crucial role in the decarbonization of cement plants.This paper proposes 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 hydrogen generation.Besides,the CaL-CLHG scheme avoids the power consumption associated with air separation in the traditional calcium looping process(CaL-Oxy).Results indicate that the specific primary energy consumption for CO2 avoided can be achieved at 2.68 GJ/t in the CaL-CLHG scheme.This represents a reduction of 33.5％compared to the CaL-Oxy scheme.Economic analysis indicates that the cost 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.In conclusion,adopting the CaL-CLHG process for the decarbonization of existing cement plants presents a techno-economically feasible option.
万方数据
维普
