Assessment methods of carbon dioxide emitted from bioenergy utilization

Renewability and cleanliness of bioenergy make itself one significant substitute of fossil energy. Estimate of carbon dioxide emission from bioenergy utilization is one of the basic steps to scientifically understand and evaluate the contribution of carbon dioxide emitted from bioenergy utilization. In this study, calculation methods of carbon dioxide emission from bioenergy utilization were summarized from the perspective of resources and utilization, mainly including five approaches: practical measurement method, material balance method, empirical coefficient estimation method, model method and life cycle assessment method. Valuable references for estimating carbon dioxide emission were provided and a series of feasible recommendations were also proposed for future use of bioenergy on the bases of analyzing advantages and disadvantages of each method and comparing them with methods used for fossil energy.