A study on the effect of heating rate during cellulose and polyethylene co-pyrolysis
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摘要: 在管式炉反应器中,对纤维素(CE)与高密度聚乙烯(HDPE)进行了慢速共热解和快速共热解的研究,考察了升温速率和混合比例对CE与HDPE共热解的影响。结果表明,CE与HDPE慢速共热解可以提高液态产率,并降低气态产率和焦炭产率。在CE与HDPE比为1∶3时,慢速共热解相互作用最强烈,此时液态产率为95.4%,与计算值相比,增加了9.8%;而快速共热解降低液态产率,同时提高气态产率。在CE与HDPE比为3∶1时,快速共热解相互作用最强烈,此时液态产率与气态产率分别为49.3%和42.8%,与计算值相比,液态产率降低了14.5%,而气态产率提高了14.1%。热解油分析结果表明,CE与HDPE共热解存在协同效应,CE与HDPE共热解有利于降低液态产物的含氧量,提高焦油的质量。Abstract: Slow co-pyrolysis and fast co-pyrolysis of cellulose (CE) with high density polyethylene (HDPE) were investigated in a tube furnace reactor. The effects of heating rate and mixing ratio on the co-pyrolysis of CE and HDPE were investigated. The results show that slow co-pyrolysis of CE and HDPE can boost liquid yields while lowering gas and char yields. When the ratio of CE to HDPE is 1∶3, the slow co-pyrolysis interaction is strongest. At this ratio, the liquid yield was 95.4%. Compared with the calculated yield, the liquid yield is increased by 9.8%. Rapid co-pyrolysis reduce the liquid yield, but increase the gas yield. When the ratio of CE to HDPE is 3∶1, the rapid co-pyrolysis interaction is strongest. The liquid and gas yields were 49.3% and 42.8%, respectively. Compared with the calculated yields, the liquid yield is reduced by 14.5% but the gas yield is increased by 14.1%. These results verified that the synergistic effect existed during co-pyrolysis of CE and HDPE under the experimental conditions. Co-pyrolysis of CE and HDPE favors reducing the oxygen content of the liquid product and improving the quality of the liquid product.
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Key words:
- co-pyrolysis /
- cellulose /
- polyethylene /
- interaction
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表 1 样品的工业分析与元素分析
Table 1 Proximate and ultimate analyses of CE and HDPE
Sample Proximate analysis w/% Ultimate analysis w/% V FC C H O CE 90.86 9.14 44.44 6.17 49.39 HDPE 100 0 85.71 14.29 0 -
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