Catalytic degradation of waste rubbers and plastics over zeolites to produce aromatic hydrocarbons

JOURNAL OF CLEANER PRODUCTION

卷:309

Article

Wang, Jia^1,2  Jiang, Jianchun^1,2  Sun, Yunjuan²  Wang, Xiaobo³  Li, Mi⁴  Pang, Shusheng⁵  Ruan, Roger^6,7  Ragauskas, Arthur J.^4,8,9  Ok, Yong Sik^10,11  Tsang, Daniel C. W.¹² 

[1] Nanjing Forestry Univ, Coll Chem Engn, Jiangsu CoInnovat Ctr Efficient Proc & Utilizat F, Longpan Rd 159, Nanjing 210037, Peoples R China

[2] Chinese Acad Forestry CAF, Inst Chem Ind Forest Prod, 16 Suojin Five Village, Nanjing 210042, Peoples R China

[3] Nanjing Xiaozhuang Univ, Sch Environm Sci, Nanjing 211171, Peoples R China

[4] Univ Tennessee, Ctr Renewable Carbon, Dept Forestry Wildlife & Fisheries, Knoxville, TN 37996 USA

[5] Univ Canterbury, Dept Chem & Proc Engn, Christchurch, New Zealand

[6] Univ Minnesota, Ctr Biorefining, 1390 Eckles Ave, St Paul, MN 55108 USA

[7] Univ Minnesota, Dept Bioprod & Biosyst Engn, 1390 Eckles Ave, St Paul, MN 55108 USA

[8] Univ Tennessee, Dept Chem & Biomol Engn, Knoxville, TN 37996 USA

[9] Oak Ridge Natl Lab, Biosci Div, Oak Ridge, TN 37831 USA

[10] Korea Univ, Korea Biochar Res Ctr, APRU Sustainable Waste Management, Seoul 02841, South Korea

[11] Korea Univ, Div Environm Sci & Ecol Engn, Seoul 02841, South Korea

[12] Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hung Hom, Kowloon, Hong Kong, Peoples R China

关键词: Catalytic pyrolysis;    Sustainable waste management;    Polybutadiene rubber;    Plastic recycling;    valorization;    Aromatic hydrocarbons;   

DOI  :  10.1016/j.jclepro.2021.127469

来源: Elsevier

【 摘 要 】

Catalytic conversion of waste rubbers and plastics into aromatic hydrocarbons is a promising approach to waste management and energy recovery. In the present study, acidic HY zeolites were supported by cobalt, iron, and zirconium, and the catalysts were characterized by powder X-ray diffraction, nitrogen adsorption-desorption, ammonia temperature programmed desorption, X-ray photoelectron spectroscopy, and pyridine-Fourier transform infrared spectroscopy. The catalytic degradation of waste polybutadiene rubbers (BR) was conducted to investigate the degradation mechanism and evaluate the catalytic activity of supported zeolites. Experimental results indicated that HY loaded by zirconium and iron led to a higher content of Lewis acid sites as opposed to cobalt supported one. Compared with the non-catalytic pyrolysis of BR, the zirconium supported HY (Zr/HY) led to a 10-fold increase in aromatic hydrocarbons production with a distinctively high selectivity of 97.9%. A series of waste polymers including waste tires (WT), polyethylene (PE), polycarbonate (PC), and BR, were subjected to catalytic pyrolysis to explore the effects of polymer type on aromatic hydrocarbons generation, and BR was the most effective substrate, with yield enhancement reaching 2.4 over Zr/HY. Catalytic co-pyrolysis of waste rubbers and plastics was conducted to probe the effect of polymer structure on aromatic hydrocarbons formation, where a significant synergistic effect was observed in the PE co-fed with PC run.

【 授权许可】

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