CHARACTERISTICS AND KINETICS OF CO-PYROLYSIS OF RICE HUSK AND PVC

MA Da-chao; GAO Wei-kang; SUN Xiang; LIU Zheng; HUANG Yi-qian; HAN Biao

doi:10.13205/j.hjgc.202001021

Volume 38 Issue 1

Mar. 2020

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2020 > 38(1): 135-140

MA Da-chao, GAO Wei-kang, SUN Xiang, LIU Zheng, HUANG Yi-qian, HAN Biao. CHARACTERISTICS AND KINETICS OF CO-PYROLYSIS OF RICE HUSK AND PVC[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(1): 135-140. doi: 10.13205/j.hjgc.202001021

Citation:

MA Da-chao, GAO Wei-kang, SUN Xiang, LIU Zheng, HUANG Yi-qian, HAN Biao. CHARACTERISTICS AND KINETICS OF CO-PYROLYSIS OF RICE HUSK AND PVC[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(1): 135-140. doi: 10.13205/j.hjgc.202001021

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CHARACTERISTICS AND KINETICS OF CO-PYROLYSIS OF RICE HUSK AND PVC

doi: 10.13205/j.hjgc.202001021

1. School of Resources, Environment and Materials, Guangxi University, Nanning 530004, China);
2. Scientific Research Academy of Guangxi Environmental Protection, Nanning 530004, China

Received Date: 2019-06-01

Abstract

Abstract

Rice husk and polyvinyl chloride (PVC) pyrolysis experiments were carried out in a thermogravimetric analyzer and corresponding kinetic analysis was carried out. It was found that the temperature of the first pyrolysis peak of rice husk in co-pyrolysis was significantly lower than that of mono-pyrolysis of rice husk, from 350℃ to 300℃, indicating that the adding of PVC elevated the pyrolysis of rice husk. When the heating rate was 20℃/min and the ratio of rice husk to PVC was 2∶1, the rate of co-pyrolysis was the highest. Three kinetic analysis methods were more powerful in explaining the existence of the phenomenon of co-pyrolysis. The Coats-Redfern method demonstrated that the co-pyrolysis activation energy was generally lower than that of mono-pyrolysis. The Ozawa method displayed that, in the pyrolysis conversion from 20% to 60%, the average activation energy of the co-pyrolysis was 37.60 kJ/mol, lower than that of mono-pyrolysis of rice husk, 41.45 kJ/mol. In the Friedman method, the activation energy of co-pyrolysis at the corresponding conversion rate was lower than that of mono-pyrolysis of rice husk. The result showed that co-pyrolysis performed as a reaction kinetic control process.
- co-pyrolysis,
- PVC,
- rice husk,
- pyrolysis characteristics,
- kinetics

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