生物质气化气大规模高品位利用的瓶颈之一在于气化焦油的深度脱除，常用的催化方法可以有效裂解轻质焦油，但对重质焦油的效果却有限，甚至是负作用。本申请拟针对轻质焦油裂解后的气化气，利用具有良好孔隙结构和导电性能的生物质导电炭在较高温度下吸附脱除重质焦油，并采用强制脉冲放电将其彻底降解，裂解气体送回气化气，再生导电炭循环使用。掌握导电炭高效脱除重质焦油的途径，研究焦油组分在导电炭中的分布规律。分析吸附了重质焦油的导电炭在强制脉冲放电过程中的传热传质规律，考察电压、脉冲气流、温度、气氛、导电炭特性、无机杂质等对重质焦油降解的影响。研究重质焦油主要成分及降解产物的分布和演变，分析导电炭电阻率、比表面积、孔径等特性参数再生前后的变化规律，阐明重质焦油在生物质导电炭强制脉冲放电过程中的降解机理与调控机制，建立基于生物质导电炭强制脉冲放电的气化重质焦油降解模型，为生物质气化气的品位利用提供新方法。

It is a bottleneck problem for biomass gasification to remove tar completely from the syngas, especially for that wished to produce high-value added products. Catalysis is a common and effective way to decompose light tar in the syngas, but it hardly works for heavy tar, or even brings a negative effect. This proposal tries to find a way to remove heavy tar from the syngas at an acceptable high temperature, in which light tar has been decomposed. Conductive biomass charcoal has a richly porous structure to adsorb heavy tar, and is of highly electrical conductivity to make enforced-pulse discharges to decompose heavy tar. The decomposing products are sent back into the syngas and the conductive biomass charcoal is regenerated. It tries to find an effective method to adsorb heavy tar using the charcoal. The distributions of main components of heavy tar are investigated. Mass and heat transfer characteristics of the charcoal in a discharging process are analyzed. Factors of heavy tar decomposing are studied during an enforced-pulse discharge process, e.g. voltage, impulse gas, temperature, atmospheres, properties of charcoal and inorganic impurities, and the decomposed products are analyzed. The characteristics of original and regenerated charcoal are compared, including electrical resistivity, specific surface, diameter of pores. The decomposing mechanism of heavy tar by an enforced-pulse discharge is raised and control methods are suggested. An optimizing model is built for decomposing heavy tar by enforced-pulse discharges using biomass conductive charcoal. This study is hoped to provide an effective way to purify the syngas of biomass gasification.