The resource utilization of ABS plastic waste with subcritical and supercritical water treatment |
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| Affiliation: | 1. Bohai Oilfield Research Institute, Tianjin Branch, CNOOC China Limited, Tanggu Tianjin 300452, China;2. State Key Laboratory of Multiphase Flow in Power Engineering (SKLMF), Xi''an Jiaotong University, 28 Xianning West Road, Xi''an 710049, Shaanxi, China;1. School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, People''s Republic of China;2. Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, People''s Republic of China;1. State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, 28 Xianning West Road, Xi’an, 710049, PR China;2. State Grid Shaanxi Electric Power Research Institute, 669 Middle Aerospace Road, Xi’an, 710100, China |
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| Abstract: | Nowadays, the massive accumulation of plastic wastes has caused serious environmental problems, and supercritical water treatment provides a promising way for the clean and efficient utilization of plastic wastes. In this work, the acrylonitrile-butadiene-styrene (ABS) plastic was selected as the feedstock, and the supercritical water gasification experiments for fuel gas production were firstly conducted from 450 °C to 700 °C, at 23 MPa. The increase of reaction time, temperature and material ratio (water/ABS) can significantly promote the gasification reaction, and the whole reaction process was obviously divided into three stages: the gasification efficiency rapidly increased firstly, maintaining nearly unchanged then, and restarted to grow. The subcritical water hydrolysis for oil products recovery was also investigated from 375 °C to 450 °C at 21 MPa, and results show that most of the monomers were converted into more stable substances at long residence time. The optimal reaction condition for monomer recovery was determined to be 400 °C and 3 min through the experimental results. |
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| Keywords: | ABS plastic Supercritical water Gasification Hydrolysis |
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