Effect of potassium on thermogravimetric behavior and co-pyrolytic kinetics of wood biomass and low density polyethylene

Limin Zhou, Hongbin Zou, Yun Wang, Zhanggao Le, Zhirong Liu and Adesoji A. Adesina

Renewable Energy, 2017, vol. 102, issue PA, 134-141

Abstract: The effect of potassium on the thermogravimetric behavior and co-pyrolytic kinetics of wood sawdust (WS) and low density polyethylene (LDPE) was investigated using a thermogravimetric analyzer. It was found that the co-pyrolysis behavior of the potassium-treated WS/LDPE mixtures were different from the combination of WS and LDPE, and the maximum weight loss between the experimental and calculated values (ΔW) was up to −24.2%. Potassium has a great influence on the pyrolysis of WS/LDPE mixtures, leading to the decrease of the characteristic decomposition temperature (TP1) and the increase of char yield with increasing potassium content. The simulation of possible structures indicates that [K-cellobiose]+ complexes have different configurations and potassium may facilitate the cracking of the glycosidic linkage and the ring-opening reaction. The kinetic analysis indicated that the co-pyrolysis of the potassium-treated WS/LDPE mixtures could be described by three independent first-order reactions. The increase of the potassium contents in the WS/LDPE mixtures causes an increase trend for E and A values in the first decomposition stage but leads to a decreasing trend in the second stage. Furthermore, the kinetic compensation effect (KCE) has been observed in each decomposition stage for the co-pyrolysis of potassium-treated WS/LDPE mixtures.

Keywords: Biomass; Low density polyethylene; Co-pyrolytic kinetics; Potassium (search for similar items in EconPapers)
Date: 2017
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Citations: View citations in EconPapers (5)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:102:y:2017:i:pa:p:134-141

DOI: 10.1016/j.renene.2016.10.028

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