Estimation of China's Railway Transport CO_2 Emissions from 2006 to 2015

摘要

Based on the calculation model of CO_2 emission, the model boundary and time interval was determined, as well as the diesel CO_2 emission factor and CO_2 emission factor for purchased electricity. Based on the converted turnovers of railway transportation, the CO_2 emission intensities and carbon emission characteristics were analyzed. Results showed that the indirect CO_2 emissions by electric locomotives were higher than direct emissions by diesel locomotives; indirect emission has become a main carbon source for railway transport. Similarly, the carbon intensity of electric locomotives was larger than the diesel locomotives. The implementation of electrification and operation of HSR would increase the energy consumption, but overall the energy efficiency of electric locomotives is superior to diesel locomotives. The indirect effect of CO_2 emission reduction of electric locomotives is higher than other transportation mode.