TY - JOUR
T1 - Enhancement of aromatics from catalytic pyrolysis of yellow poplar
T2 - Role of hydrogen and methane decomposition
AU - Moogi, Surendar
AU - Jae, Jungho
AU - Kannapu, Hari Prasad Reddy
AU - Ahmed, Ashfaq
AU - Park, Eun Duck
AU - Park, Young Kwon
N1 - Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2020/11
Y1 - 2020/11
N2 - The present study examined the effects of the pyrolysis environment on BTEX (benzene, toluene, ethylbenzene, and xylenes) production in the catalytic upgrading of yellow poplar pyrolysis vapors. Three different gas environments, N2, CH4, and pre-decomposed CH4 stream (10 wt%-Ni/5 wt%-La2O3-5 wt% CeO2-Al2O3), which is a mixture of H2 (55.62%) and CH4, were studied using two types of zeolite catalysts, HZSM-5, and 1 wt% Ga/HZSM-5. The BTEX yields were enhanced linearly in the order N2 < CH4 < CH4 ex-situ decomposition. The highest BTEX yield of 9.58 wt% was obtained under the CH4 ex-situ decomposition environment over 1 wt% Ga/HZSM-5. The methane and hydrocarbons derived from biomass were activated on highly dispersed (GaO)+ sites and transformed smoothly to BTEX by aromatization on the BrØnsted acid sites of Ga/HZSM-5. The hydrogen produced from methane decomposition also assisted in aromatics production through the hydrodeoxygenation of methoxyphenols, guaiacols and catechols.
AB - The present study examined the effects of the pyrolysis environment on BTEX (benzene, toluene, ethylbenzene, and xylenes) production in the catalytic upgrading of yellow poplar pyrolysis vapors. Three different gas environments, N2, CH4, and pre-decomposed CH4 stream (10 wt%-Ni/5 wt%-La2O3-5 wt% CeO2-Al2O3), which is a mixture of H2 (55.62%) and CH4, were studied using two types of zeolite catalysts, HZSM-5, and 1 wt% Ga/HZSM-5. The BTEX yields were enhanced linearly in the order N2 < CH4 < CH4 ex-situ decomposition. The highest BTEX yield of 9.58 wt% was obtained under the CH4 ex-situ decomposition environment over 1 wt% Ga/HZSM-5. The methane and hydrocarbons derived from biomass were activated on highly dispersed (GaO)+ sites and transformed smoothly to BTEX by aromatization on the BrØnsted acid sites of Ga/HZSM-5. The hydrogen produced from methane decomposition also assisted in aromatics production through the hydrodeoxygenation of methoxyphenols, guaiacols and catechols.
KW - Aromatics
KW - CH decomposition
KW - Catalytic co-pyrolysis
KW - Ga/HZSM-5
KW - Yellow poplar
UR - http://www.scopus.com/inward/record.url?scp=85088045282&partnerID=8YFLogxK
U2 - 10.1016/j.biortech.2020.123835
DO - 10.1016/j.biortech.2020.123835
M3 - Article
C2 - 32693345
AN - SCOPUS:85088045282
SN - 0960-8524
VL - 315
JO - Bioresource Technology
JF - Bioresource Technology
M1 - 123835
ER -
