CTAB与亚临界水联合预处理对污泥水热液化制备生物油的影响

以脱水污泥为原料针探究对其水热液化（HTL）制取生物油的影响.结果表明，胞外聚合物（EPS）的释放可以促进有机物在高温时断链成分子量较高的有机质，促进生物油的形成.与原污泥相比，亚临界水（SCW）预处理会促进脱氨基反应，生物油中的氮含量降低51.74%；十六烷基三甲基溴化铵（CTAB）预处理则促进了19.3wt%的有机物转移至油相中，同时生物油中的酸含量降低13.49%；CTAB-SCW联合预处理后，生物油收率提升了66.92%，醇含量提升28.32%.联合预处理中酯交换反应是主反应，同时亲核反应、氧化反应和消除反应也显著增强.

Hydrothermal liquefaction of sewage sludge to produce bio-oil: Effect of co-pretreatment with subcritical water and mixed surfactants

Hydrothermal liquefaction (HTL) of dehydrated sludge was conducted for bio-oil production in the present study. Results showed that the removal of extracellular polymeric substance caused organic matter to break down into organic polymer compounds at high temperature and promoted the formation of bio-oil. Compared with the non-pretreatment sludge, subcritical water (SCW) pretreatment promoted the deamination reaction and the nitrogen content reduced by 51.74% in the bio-oil. Cetyl trimethyl ammonium bromide (CTAB) pretreatment promoted 19.3wt% of organic matter from the aqueous and gaseous phases to the oil phase and the acid content reduced by 13.49wt%. CTAB-SCW combined pretreatment the bio-oil yield increased by 66.92% and the alcohol content by 28.32%. Transesterification reaction in the combined pretreatment was the main reaction, at the same time, the nucleophilic reaction, the oxidation reaction and the elimination reaction were also remarkably enhanced.