Regional disparity in clinker emission factors and their potential reduction in China

Abstract

Detailed analysis the disparity and reduction potential of clinker emission factors at the provincial level is important for regional reduction policies. Using the surveyed data from 185 new suspension and pre-heater (NSP) process lines and 69 Shaft kiln lines, this study firstly analyzed the disparity in emission factors based on production process, production scale, and regional distribution in 2015. We found that the emission factor of the Shaft kiln process (898.24 kg/t) is higher than that of the NSP process (858.59 kg/t), 16 and that small-scale production lines have higher emission factors than large-scale lines both for the two 17 process. China's clinker emission factors increase from the eastern to the western regions. Then we 18 estimated the reduction potential of structural adjustment, raw material substitution, and energy saving and 19 fuel substitution in regional emission factors by 2030. The result shows that emission factors of the 20