木质成型颗粒生命周期能量和温室气体排放分析

LIFE CYCLE ANALYSIS OF ENERGY CONSUMPTION AND GREENHOUSE GAS EMISSIONS FOR WOOD PELLET

利用混合生命周期评估方法对木质成型颗粒的可持续性进行评价,结果表明:木质成型颗粒全生命周期的能耗为0.11MJ/MJ颗粒,其中直接能耗79%,间接能耗21%,所占比例最大的是颗粒生产阶段的电力投入和生产设施投入;颗粒全生命周期的温室气体(GHG)排放为215kg CO2-eq/t颗粒,颗粒生产电力消耗造成的排放最大,其次是颗粒燃烧直接排放;生物质成型颗粒具有良好的可持续性,能在节能减排中发挥重要作用。

Aiming at evaluating feasibility and sustainability of biomass pellet in China, a hybrid life cycle assess-ment （LCA） method was used to quantify energy consumption and GHG emissions over the entire life cycle of wood pellet, combining process analysis with economic input-output analysis. The results show that the wood pellet has a life-cycle energy consumption of 0. llMJ/MJ, 21% of which are related to non-energy goods. The major inputs are electricity consumption and facility for pelletproduction. The life-cycle GHG emissions is 215kg CO2-eq/t, among them the electricity consumption contributes most, followed by pellet combustion facility. The results indicate that biomass pellet may play a positive role in alleviating fossil-fuel related problems.