The Potential of CO_2 Emission Reduction by Developing Ethanol in China

The evaluation of the potential of CO2 emission reduction by developing non-corn based ethanol in China is valuable for setting up countermeasures to climate change and establishing the developing policy of ethanol.According to the land occupation feature of feedstock,the method for feedstock classification is established.The paper selects low quality arable marginal land to plant land based feedstock,as well as utilizing the byproduct of crops as sources for non-land based feedstock.Then,the evaluation model of potential of CO2 emission reduction is set up and used to perform the evaluation of potential of CO2 emission reduction in China in 2015 and 2030,respectively.The result shows that,in 2015 and 2030,China can obtain 10.947 and 49.027 million t of CO2 emission reduction potential.Moreover,it indicates that non-land based feedstock can produce more ethanol so as to get higher potential.With regard to the spatial distribution of the potential of CO2 emission reduction,the regions that contribute low and extremely low potential of emission reduction dominate the spatial pattern in 2015,as well as regions with high and extremely high potential are the majorities in 2030.In addition,the '∏-shaped' spatial structure is exhibited in the distribution of China's potential for CO2 emission reduction in 2030.