Xiaona Lin, Hongzhen Cai, Weiming Yi, Yao Xie
Shandong University of Technology, PR China
Posters & Accepted Abstracts: Arch Chem Res
The effect of potassium on the thermogravimetric behaviors of corn stover (CS)/high density polyethylene (HDPE) mixtures were studied using a thermogravimetric (TG) analyzer from room temperature to 1073 K with a heating rate of 10 K/min. ICP-OES results showed that the contents of alkali/alkaline earth metal ions (K, Ca, Na, Mg) in corn stover decreased significantly after acid pertreatment. TG results indicated that both the initial decomposition temperature and the maximum decomposition temperature of acid-treated corn stover (ACS) shifted to a lower temperature with increasing potassium concentration. The presence of potassium ions reduced the initial activation energy of corn stover, facilitated the cracking of the glycosidic linkage and the ring-open reaction, but promoted the formation of coke. Potassium has little effect on the decomposition behavior of HDPE. The co-pyrolysis behaviors of (acid-treated) corn stover/ HDPE mixtures were different from the corn stover and HDPE pyrolysis alone. The differences of theoretical and experimental TG and DTG curves indicated that a synergetic effect existed during the co-pyrolysis process. Potassium has a significant effect on the co-pyrolysis behaviors of acid-treated corn stover/ HDPE mixtures resulting in the decrease of the two maximum mass loss rates and the increase of char yields with the increase of potassium content. The presence of potassium had an effect on the synergistic effect between acid-treated corn stover and HDPE. linxiaona1120@163.com
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