【摘要】 研究了云南褐煤和城市污泥共水热改性后的产物,分析了城市污泥掺混量对固体产物、液体产物、气体产物的理化特性的影响,探讨了在共水热改性过程中,污泥掺混量对云南褐煤的作用机制。结果表明,云南褐煤和城市污泥在共水热改性过程中有协同碳化作用;随着污泥掺混量的增加,两者混合物发生明显的脱水、脱羧及芳香化反应;当污泥掺混量为10%和30%时,芳香C的比例显著增加,芳香化反应程度更加剧烈,尤其当污泥掺混量为10%时,固体产物芳香C比例及芳香化程度最高。气相色谱分析(GC-MS)结果表明,随着污泥掺混量的增加,液体产物中杂环类有机物含量呈增加的趋势,酚类有机物呈减少的趋势。固液气三相产物碳含量分布结果表明,至少80%碳封存于固体产物中,可以实现最大程度的碳封存。更多还原

【Abstract】 The co-hydrothermal carbonization products from the Yunnan lignite blended with different proportion of sewage sludge are studied. The effects of different proportion of sewage sludge on the physical and chemical properties of solid,liquid and gaseous co-hydrothermal products are analyzed. The mechanism of the co-hydrothermal carbonization process from Yunnan lignite blended with sewage sludge is elucidated. The results show that the synergistic carbonation of lignite and municipal sludge in the process of co-hydrothermal modification is observed. With the increase of the amount of sludge,the mixture has obvious dehydration,decarboxylation and aromatization reaction. When the sludge proportion is10% and 30%,aromatic C ratio is significantly increased and the degree of aromatization reaction is more intense.Especially,when the mixture proportion is 10%,the solid products contain the highest aromatic C ratio and aromaticity.The GC-MS indicates that with the increase of the proportion of sewage sludge,the content of heterocyclic organic matter in the liquid products shows a increasing trend and phenol organic matters have a decreasing trend. The carbon distribution of solid,liquid and gaseous products manifested more than 80% of carbon is sequestrated in solid products,achieving the highest extent of carbon sequestration.更多还原