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A study on catalytic co-pyrolysis of kitchen waste with tire waste over ZSM-5 using TG-FTIR and Py-GC/MS

Chen, Jiawei, Ma, Xiaoqian, Yu, Zhaosheng, Deng, Tonghui, Chen, Xinfei, Chen, Lin, Dai, Minquan
Bioresource technology 2019 v.289 pp. 121585
Fourier transform infrared spectroscopy, activation energy, alkenes, ammonia, carbon dioxide, carbon monoxide, gas chromatography-mass spectrometry, gases, kitchen waste, nitric oxide, pyrolysis, pyrolysis oils, sulfur dioxide, synergism, tires
Co-pyrolysis characteristics of kitchen waste (KW) with tire waste (TW) were studied by TGA-FTIR and Py-GC/MS. The kinetic parameters were calculated by Ozawa-Flynn-Wall (OFW) and the Kissinger-Akahira-Sunose (KAS) methods. TGA-FTIR results indicated that CO2, CO, NO, NH3, SO2, CH and CC groups were the main gases released from the pyrolysis process, finding that a certain coupling synergistic interaction occurred between KW and TW. Co-pyrolysis of KW and TW displayed positive synergy in pyrolysis kinetics, especially at the ratio of 5:5 whose apparent activation energy declined 16.78% (by FWO) and 17.54% (by KAS). The Py-GC/MS results found that co-pyrolysis could increase the total peak area of volatile matters (10.92–15.34%). Moreover, co-pyrolysis could increase hydrocarbons (especially for olefins (13.25–37.42%)) and inhibit non-hydrocarbon compounds (about 63%) of volatile products. In brief, co-pyrolysis of KW and TW could be a potential way for improving quality of pyrolysis oil.