(Co-)pyrolytic performances and by-products of textile dyeing sludge and spent mushroom substrate
(Co-)pyrolytic performances and by-products of textile dyeing sludge and spent mushroom substrate
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DOI：
10.1016/j.jclepro.2020.121195
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发表时间：
2020-07
影响因子：
11.1
通讯作者：
Jianli Huang;Jingyong Liu;Ken-Lin Chang;Musa Buyukada;F. Evrendilek
中科院分区：
文献类型：
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作者：
Jianli Huang;Jingyong Liu;Ken-Lin Chang;Musa Buyukada;F. Evrendilek
以印染污泥和食用菌糠为原料进行共热解实验，研究了它们的热行为和热解副产物。印染污泥的挥发分主要发生在150 ~ 500 °C之间，而无机物的分解以及焦炭和焦油的二次裂解主要发生在500 ~ 1000 °C之间。废蘑菇基质的添加增加了纺织印染污泥及其混合物的挥发分释放速率，由于其较高的挥发分含量。提高共热解性能主要发生在高温。无机物的熔融随温度的升高而增强，但随菌糠的加入而减弱。硫在印染污泥中主要以硫酸盐的形式存在，而在蘑菇菌糠中主要以有机硫的形式存在。随着温度的升高，含氮化合物形成了更稳定的化合物。废蘑菇基质通过将氮转化为非活性形式来促进氮氧化物的形成。硫酸盐在高温下分解，部分转化为硫化物。在800 °C下，30%的废蘑菇基质增加了相对硫酸盐含量，并将硫固定到无机化合物中。随着温度的升高，生物油中芳烃和含氮化合物的相对含量增加，烷烃的相对含量下降。废蘑菇基质增强了芳香族化合物的形成，降低了含氮化合物和酸性挥发物的产率。共热解有利于提高印染污泥的热解性能和生物油质量。
The (co-)pyrolysis of textile dyeing sludge and spent mushroom substrate was conducted to characterize their thermal behaviors and by-products. The devolatilization of textile dyeing sludge mainly occurred between 150 and 500 °C, while the decomposition of inorganic matter as well as the secondary cracking of coke and tar happened between 500 and 1000 °C. The addition of spent mushroom substrate increased the release rate at the devolatilization stage of textile dyeing sludge and their blends due to its higher volatiles content. The enhanced co-pyrolysis performance occurred mainly at the high temperature. The melting of inorganic matter was enhanced with the temperature rise but weakened with the addition of spent mushroom substrate. Sulfur mainly existed as sulfate in textile dyeing sludge and as organic sulfur in spent mushroom substrate. With the temperature rise, nitrogen-containing compounds formed more stable compounds. Spent mushroom substrate promoted the formation of nitrogen oxides by converting nitrogen to an inactive form. Sulfates were decomposed at high temperatures partially turning into sulfide. 30% spent mushroom substrate increased the relative sulfate content at 800 °C and fixed sulfur into inorganic compounds. The relative contents of aromatics, and nitrogen-containing compounds rose in the bio-oils, whereas alkanes fell with the elevated temperature. Spent mushroom substrate enhanced the formation of aromatics and reduced the yields of nitrogen-containing compounds, and acidic volatiles. The co-pyrolysis appeared to improve the bio-oil quality and the pyrolytic performance of textile dyeing sludge.