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Pyrolysis characteristics, kinetics and evolved volatiles determination of rice-husk-based distiller's grains
Biomass & Bioenergy ( IF 6 ) Pub Date : 2020-02-29 , DOI: 10.1016/j.biombioe.2020.105525
Zhao Zhang , Qiuju Wang , Luwei Li , Guoren Xu

Pyrolysis characteristics, kinetics and evolved volatiles of rice-husk-based distiller's grains (RHDG) were determined by thermogravimetric analysis and pyrolysis (Py)-GC/MS with rice husks (RH) as a comparison. The activation energy of RHDG was 239.84 ± 48.10 kJ/mol attained by Flynn-Wall-Ozawa method and 241.89 ± 49.78 kJ/mol by Kissinger-Akahira-Sunose method, much higher than RH and other biomasses. Diesel range organics account for 59.40%, 54.44%, 52.77% of volatiles obtained from RHDG pyrolysis, and C18, C16 were the most abundant components including oleic acids, octadecanoic acid and n-hexadecanoic acid. Pyrolysis evolved volatiles from RHDG had higher atomic H/C and O/C ratios compared with those from RH. The highest content in the volatiles from RHDG was acids (55.66%, 39.29% and 37.04% at 300 °C, 400 °C and 500 °C), which were mainly the evaporation of fatty acids in fermentation residues. Pyrolysis kinetics and evolved volatiles determination provide an in-depth understanding of rice-husk-based distiller's grains pyrolysis behaviors and basis for design and scale-up of pyrolysis process and reactor.



中文翻译:

稻壳型酒糟的热解特性,动力学和挥发物的测定

通过热重分析和热解(Py)-GC / MS与稻壳(RH)进行比较,确定了稻壳型蒸馏酒(RHDG)的热解特性,动力学和挥发物。Flynn-Wall-Ozawa方法获得的RHDG活化能为239.84±48.10 kJ / mol,Kissinger-Akahira-Sunose方法获得的活化能为241.89±49.78 kJ / mol,远高于RH和其他生物质。柴油级有机物占RHDG热解获得的挥发物的59.40%,54.44%,52.77%,C18,C16是最丰富的成分,包括油酸,十八烷酸和正十六烷酸。与RH相比,RHDG的热解挥发物具有更高的原子H / C和O / C比。RHDG中挥发物的最高含量是酸(在300°C,400°C和500°C时为55.66%,39.29%和37.04%),主要是发酵残渣中的脂肪酸蒸发。热解动力学和挥发物的测定提供了对基于稻壳的蒸馏器的谷物热解行为的深入了解,并为热解过程和反应器的设计和放大提供了基础。

更新日期:2020-03-02
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