Effect of oxidative torrefaction upgrade on physicochemical properties of rice straw

KAI Xing-ping; YU Yi-teng; YANG Tian-hua; ZHU Jing-bo

doi:10.19906/j.cnki.JFCT.2021064

Volume 49 Issue 12

Dec. 2021

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Article Navigation > Journal of Fuel Chemistry and Technology > 2021 > 49(12): 1812-1820

KAI Xing-ping, YU Yi-teng, YANG Tian-hua, ZHU Jing-bo. Effect of oxidative torrefaction upgrade on physicochemical properties of rice straw[J]. Journal of Fuel Chemistry and Technology, 2021, 49(12): 1812-1820. doi: 10.19906/j.cnki.JFCT.2021064

Citation:

KAI Xing-ping, YU Yi-teng, YANG Tian-hua, ZHU Jing-bo. Effect of oxidative torrefaction upgrade on physicochemical properties of rice straw[J]. Journal of Fuel Chemistry and Technology, 2021, 49(12): 1812-1820. doi: 10.19906/j.cnki.JFCT.2021064

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Effect of oxidative torrefaction upgrade on physicochemical properties of rice straw

doi: 10.19906/j.cnki.JFCT.2021064

College of Energy and Environment, Shenyang Aerospace University, Key Laboratory of Clean Energy of Liaoning, Shenyang 110136, China

Funds: The project was supported by the National Natural Science Foundation of China (51576135) and Natural Science Foundation of Liaoning Province of China (2018011626-301) and General Project of of Education Department of Liaoning Province（LJK0217）.

Received Date: 2021-04-06
Rev Recd Date: 2021-06-01

Available Online: 2021-06-29

Publish Date: 2021-12-29

Abstract

Abstract

Torrefaction atmosphere is one of the key problems in industrial application of torrefaction technology. In this paper, the effects of oxygen concentration and torrefaction temperature on the physicochemical properties of rice straw during oxidative torrefaction were investigated by simulating the atmosphere of oxy-fuel combustion flue gas. The results show that the effect of temperature on oxidative torrefaction is more significant compared with oxygen concentration. At low temperature (< 250 ℃), oxygen concentration has little effect on the mass and energy yield of torrefied rice straw, but it has obvious effect at high temperature (> 250 ℃). With the increase of temperature (> 250 ℃), the mass and energy yields of torrefied rice straw decrease significantly. When the temperature and oxygen concentration are 250 ℃ and 6%, respectively, it is a suitable oxidative torrefaction condition. Under this condition, the mass and energy yields of torrefied rice straw can be maintained above 70% and 80%, respectively. Increasing the temperature mainly enhances the torrefaction reaction, and the oxidation reaction has an obvious effect when the oxygen concentration exceeds 6%. The retention ratio of chlorine and potassium has an downward trend with the increase of temperature and oxygen concentration, and the effect of increasing temperature is more significant.
- biomass,
- oxidative torrefaction,
- oxygen concentration,
- chlorine,
- potassium

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References(37)

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