tar(计算)
分解
萘
热解
废物管理
污水污泥
热分解
开裂
化学
制浆造纸工业
化学工程
燃烧
氢
燃烧热
有机化学
污水
工程类
程序设计语言
计算机科学
作者
Bo Wang,Yinhe Liu,Yu Guan,Yiwei Feng
标识
DOI:10.1016/j.jclepro.2021.130224
摘要
Pyrolysis is considered a promising way to treat sewage sludge and extract energy. This paper first studied the applicable conditions and characteristics of high-ash sewage sludge (HASS) pyrolysis to produce hydrogen-rich combustible gas. The yields and characteristics of three-phase products of pyrolysis gas, tar, and solid product of HASS were determined. The weight-loss behavior and kinetic characteristics of pyrolysis were analyzed by thermogravimetric experiment. HASS mainly decomposed at 540–901 °C and the weight loss rate was between 2.399 %⋅min−1 and 3.372 %⋅min−1. The activation energies of the main decomposition process of HASS ranged from 137.081 to 198.673 kJ⋅mol−1. Devolatilization is more likely to occur than the cracking of macromolecular organic compounds and the decomposition of minerals. Naphthalene occupies the highest proportion of tar, ranging from 18.88 to 61.15%. H2, CO2, CO, CH4 are the major components of pyrolysis gas. The H2 content and lower heating value of the hydrogen-rich combustible gas obtained by pyrolysis of HASS with a particle size of 0.15–0.18 mm at 800 °C, which is the most suitable condition for producing hydrogen-rich combustible gas, reached the highest values of 51.477% and 13.960 MJ⋅m−3, respectively. H2 is the product of cracking, decarboxylation, aromatization, and cyclization of macromolecular organic matter in the HASS.
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