Kim, Young-Min Jae, Jungho Lee, Hyung Won Han, Tae Uk Lee, Heejin Park, Sung Hoon Kim, Seungdo Watanabe, Chuichi Park, Young-Kwon 2024-01-20T03:04:05Z 2024-01-20T03:04:05Z 2021-09-04 2016-10-01 0196-8904 https://pubs.kist.re.kr/handle/201004/123579 The thermal and ex-situ catalytic pyrolysis of different citrus peels, Citrus paradisi peel, Citrus sinensis peel, Citrus unshiu peel, and Citrus limon peel, were studied by thermogravimetric, evolved gas analysis-mass spectrometry and tandem micro-reactor-gas chromatograph/mass spectrometry analyses. Kinetic analysis revealed more complicated reaction steps and a wider range of activation energies of citrus peels than those of wood powder due to the presence of pectin in the citrus peels. Large amounts of methanol formation from each citrus peel were also recorded by evolved gas analysis-mass spectrometry and fast pyrolysis-gas chromatograph/mass spectrometry analyses at the main decomposition temperature of pectin, between 150 and 250 degrees C. Mesoporous MFI was found to be a more effective catalyst for the production of mono aromatic compounds (benzene, toluene, ethylbenzene, and xylene; 3.06-4.17 C%) and light olefins (ethene, propene, butene, and butadiene; 8.13-9.13 C%) than Al-MCM-41 (mono aromatic compounds 0.67-0.93 C% and light olefins 3.61-4.58 C%) because of its higher catalytic activity in deoxygenation and aromatization due to the stronger acidity of mesoporous MFI. The yield of mono aromatic compounds over mesoporous MFI was highest from C paradisi peel (4.17 C%), followed in order by C. sinensis peel (3.83 C%), C unshiu peel (3.61 C%), and C limon peel (3.06 C%), due mainly to the different contents and properties of pectin in each citrus peel. The higher activities of mesoporous MFI than Al-MCM-41 were also maintained during the 7 times sequential catalytic pyrolysis of C paradisi peel, demonstrating the stability of mesoporous MFI catalyst. (C) 2016 Elsevier Ltd. All rights reserved. English PERGAMON-ELSEVIER SCIENCE LTD CO-PYROLYSIS BIOMASS WASTE CONVERSION METHANOL PECTIN DEACTIVATION COMPONENTS MECHANISM KINETICS Ex-situ catalytic pyrolysis of citrus fruit peels over mesoporous MFI and Al-MCM-41 Article 10.1016/j.enconman.2016.02.065 1 ENERGY CONVERSION AND MANAGEMENT, v.125, pp.277 - 289 ENERGY CONVERSION AND MANAGEMENT 125 277 289 scie scopus 000384860500025 2-s2.0-84959545145 Thermodynamics Energy & Fuels Mechanics Thermodynamics Energy & Fuels Mechanics Article CO-PYROLYSIS BIOMASS WASTE CONVERSION METHANOL PECTIN DEACTIVATION COMPONENTS MECHANISM KINETICS Citrus peels Mesoporous catalyst Tandem micro reactor-GC/MS Pectin BTEXs