【作者】 郭绍鑫； 刘国涛； 唐利兰； 徐成； 王政；

【Author】 Guo Shaoxin;Liu Guotao;Tang Lilan;Xu Cheng;Wang Zheng;Key Laboratory of Three Gorges Reservoir Region’s Eco-Environment, Ministry of Education, Chongqing University;

【机构】 重庆大学三峡库区生态环境教育部重点实验室；

【摘要】 以城市垃圾有机部分为原料,在不同温度下(500,600,700,800℃)进行热解,利用傅里叶红外光谱分析(FTIR)和气相色谱-质谱分析(GC-MS)对不同温度下的各形态产物进行表征,研究三相产物(热解炭、焦油、热解气)分布特性,分析各物质在热解过程中的转化途径,揭示有机垃圾热解反应机理。结果表明:随着热解温度升高,有机垃圾三相产物间发生转化,热解炭产率从31.38%降至25.58%,热解气产率从41.70%升至52.66%,热解焦油产率先升高后降低,在600℃获得最高产率;有机垃圾热解炭化,羟基(OH)、羰基(C=O)等官能团完全脱除,C—H键含量增加,热解炭芳香性增强;多环芳烃是焦油的主要成分,含量随热解终温升高而上升,萘是多环芳烃的主要成分;热解气的主要成分是烯烃,随着温度升高含量上升;有机垃圾热解具有明显的以600℃为温度界限的两阶段反应。更多还原

【Abstract】 Organic part of municipal waste was selected as raw materials for slow pyrolysis.The products of various forms at different temperatures(500℃, 600℃, 700℃ and 800℃) were characterized by using Fourier infrared spectroscopy(FTIR)and gas chromatography-mass spectrometry(GC-MS).The distribution characteristics of three-phase products(biochar, tar and gas) were studied, the conversion pathway of each substance in the pyrolysis process was analyzed, and the reaction mechanism of organic waste pyrolysis was summarized.It was observed that the conversion take place between the three-phase products of organic waste as the temperature of pyrolysis increased.The yield of pyrolysis biochar decreased from 31.38% to25.58%, and the yield of pyrolysis gas increased from 41.70% to 52.66%, the pyrolysis tar yield first increased and then decreased, and the highest yield is obtained at 600℃.The FTIR characterization results of biochar suggested that when organic waste was pyrolyzed and carbonized, functional groups such as hydroxyl group(C—OH) and carbonyl group(C=O) are completely removed and C—H bonds increased, and the aromatization of pyrolysis biochar was increased.Polycyclic aromatic hydrocarbons(PAHs)were the main components of tar, increased with the increase of pyrolysis final temperature.Naphthalene was the main component of PAHs.The main component of pyrolysis gas was olefin, and its content increased with the increase of temperature.The pyrolysis of organic waste had an obvious two-stage reaction with a temperature boundary of 600 ℃.更多还原