Sirous-Rezaei, Pouya Jae, Jungho Ha, Jeong-Myeong Ko, Chang Hyun Kim, Ji Man Jeon, Jong-Ki Park, Young-Kwon 2024-01-19T23:01:56Z 2024-01-19T23:01:56Z 2021-09-03 2018-04-07 1463-9262 https://pubs.kist.re.kr/handle/201004/121488 Strong adsorption of phenolics on zeolite acid sites causes high trapping inside zeolite channels and low catalytic activity of zeolite-supported catalysts in atmospheric pressure hydrodeoxygenation (HDO) of lignin-derived phenolics. This adsorption is more severe at low temperatures, and restricts the atmospheric HDO of phenolics to high reaction temperatures. The purpose of this research was to develop a catalyst with low phenolic trapping potential and high HDO efficiency under mild reaction conditions. Among the tested catalysts (Fe/HBeta, FeReOx/HBeta, Fe/MCM-41, ReOx/MCM-41, FeReOx/MCM-41, Fe/ZrO2 and FeReOx/ZrO2), the novel catalyst of FeReOx/ZrO2 exhibited the highest catalytic efficiency for mild-condition (pressure: 1 atm and temperature <350 degrees C) HDO of phenolics (guaiacol, m-cresol and anisole), and led to the selective production of BTX aromatics. Compared to Fe/HBeta(38) as a zeolite-supported catalyst, FeReOx/ZrO2 displayed remarkably enhanced performance, and its catalytic activity for the HDO of m-cresol at 350 degrees C was almost twice higher than that of Fe/HBeta(38) at 500 degrees C. Importantly, FeReOx/ZrO2 revealed a high HDO efficiency (BTX yield of 50.5 wt% with phenolic trapping below 5 wt%) at a low temperature of 250 degrees C, while Fe/HBeta(38) almost lost its entire catalytic activity at this temperature, and gave a low BTX yield of 3.0 wt% with a high trapped phenolic yield of 83.1 wt%. The remarkable catalytic activity of FeReOx/ZrO2 in the HDO of phenolics at atmospheric pressure and temperatures as low as 250 degrees C is a result of its mesoporosity and oxophilicity as well as its well-balanced acidity induced by both rhenium oxide and zirconia support causing a high dehydration efficiency. English ROYAL SOC CHEMISTRY CONTINUOUS HYDROTHERMAL SYNTHESIS PYROLYSIS BIO-OIL M-CRESOL PHASE HYDRODEOXYGENATION SUPERCRITICAL WATER OXOPHILIC SUPPORTS BIOMASS PYROLYSIS ZEOLITE CATALYSTS PT/HBETA CATALYST HZSM-5 CATALYST Mild hydrodeoxygenation of phenolic lignin model compounds over a FeReOx/ZrO2 catalyst: zirconia and rhenium oxide as efficient dehydration promoters Article 10.1039/c7gc03823b 1 GREEN CHEMISTRY, v.20, no.7, pp.1472 - 1483 GREEN CHEMISTRY 20 7 1472 1483 scie scopus 000432567300007 2-s2.0-85045048353 Chemistry, Multidisciplinary Green & Sustainable Science & Technology Chemistry Science & Technology - Other Topics Article CONTINUOUS HYDROTHERMAL SYNTHESIS PYROLYSIS BIO-OIL M-CRESOL PHASE HYDRODEOXYGENATION SUPERCRITICAL WATER OXOPHILIC SUPPORTS BIOMASS PYROLYSIS ZEOLITE CATALYSTS PT/HBETA CATALYST HZSM-5 CATALYST