Integrated assessment of CO2reduction technologies in China’scement industry

摘要

The main objective of this article is to evaluate CO2mitigation potential and to calculate costs avoidedby the use of different CO2mitigation technologies in China’s cement sector, namely energy efficiencyimprovements, use of alternative fuels, clinker substitution and carbon capture and storage (CCS). Threescenarios are designed based on the projection of cement output and technology development overthe next 40 years (2010–2050). 2.5, 4.7 and 4.3 Gt tonnes of CO2will be saved totally in basic scenarioand two low carbon scenarios up to 2050. By comparing these technologies along the scenarios, it canbe concluded that CO2emissions can mainly be reduced by energy efficiency improvements and useof alternative fuels. Clinker substitution, which reduces the clinker-to-cement ratio as well as energyintensity, results in significant cost advantages. CCS, including post-combustion capture and oxy-fuelcombustion capture, could play an important role in the capture of CO2in the cement industry, and isexpected to be in commercial use by 2030.