Coprocessing of Agricultural Plastic Waste and Switchgrass via Tail Gas Reactive Pyrolysis

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• 作者：Christina Dorado ; Charles A. Mullen ; Akwasi A. Boateng
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2015
• 出版时间：October 14, 2015
• 年：2015
• 卷：54
• 期：40
• 页码：9887-9893
• 全文大小：321K
• ISSN：1520-5045

文摘

Pyrolysis of mixtures of agricultural plastic waste in the form of polyethylene hay bale covers (PE) (4鈥?7%) and switchgrass were investigated using the US Department of Agriculture鈥檚 tail gas reactive pyrolysis (TGRP) process at different temperatures (400鈥?70 掳C). TGRP of switchgrass and plastic mixtures significantly reduced the formation of waxy solids that are produced during regular pyrolysis. Under an atmosphere of approximately 70% recycled tail gas, mostly noncondensable gases were produced along with highly deoxygenated and aromaticized pyrolysis oil. When the atmosphere was diluted further to a recycled tail gas concentration of about 55%, higher yields of liquid product were achieved but with less deoxygenation. TGRP of low plastic mixtures (4鈥?%) produced oils with increased carbon and reduced oxygen content compared to the fast pyrolysis of switchgrass alone. Noncondensable gas fractions containing high concentrations of H₂, CO, ethylene, and other light hydrocarbons remained a significant portion of the product mixture at temperatures above 500 掳C.