title: An experimental study on the formation of methoxyaromatics during pyrolysis of Eucalyptus pulverulenta: Yields and mechanisms.
abstract: The production of bio-oil rich in methoxyaromatics during catalytic pyrolysis of Eucalyptus pulverulenta (EP) was studied using a fixed-bed reactor in the temperature range of 300-500°C and the bio-oil composition was analyzed by using a GC-MS. The results showed that the highest bio-oil yield of 38.45wt% was obtained at 400°C in the presence of Na2CO3, and the concentration of methoxyaromatics reached the maximum value of 63.4%(area) in the bio-oil. The major methoxyaromatics identified in bio-oil were guaiacol, syringol, 4-ethyl-2-methoxy phenol, and 1,2,4-trimethoxybenzene. The analysis of gaseous products indicated that CO2 was the major gas at low-temperatures and concentrations of H2 and CH4 increased with increasing pyrolysis temperature. Na2CO3 promoted the formation of methoxyaromatics, while NaOH seems to have enhanced the formation of phenolics. The mechanism of the formation of methoxyaromatics during pyrolysis of EP was proposed.
authors.affiliation: Key Laboratory of Advanced Coal and Coking Technology of Liaoning Province, School of Chemical Engineering, University of Science and Technology Liaoning, Anshan 114051, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Xu
authors.affiliation: Key Laboratory of Advanced Coal and Coking Technology of Liaoning Province, School of Chemical Engineering, University of Science and Technology Liaoning, Anshan 114051, China.
authors.forename: Arash
authors.initials: A
authors.lastname: Tahmasebi
authors.affiliation: Key Laboratory of Advanced Coal and Coking Technology of Liaoning Province, School of Chemical Engineering, University of Science and Technology Liaoning, Anshan 114051, China; Chemical Engineering, University of Newcastle, Callaghan, NSW 2308, Australia. Electronic address: jianglongyu@163.com.
authors.forename: Jianglong
authors.initials: J
authors.lastname: Yu
mesh_terms: D056804:Biofuels / Q000032:analysis; D002245:Carbon Dioxide / Q000032:analysis; D002254:Carbonates / Q000494:pharmacology; D002384:Catalysis; D005052:Eucalyptus / Q000737:chemistry*; D008401:Gas Chromatography-Mass Spectrometry; D006358:Hot Temperature; D006841:Hydrocarbons, Aromatic / Q000737:chemistry / Q000378:metabolism*; D010636:Phenols / Q000032:analysis; D010938:Plant Oils / Q000737:chemistry / Q000378:metabolism; D012972:Sodium Hydroxide / Q000494:pharmacology
chemical_list: D056804:Biofuels; D002254:Carbonates; D006841:Hydrocarbons, Aromatic; D010636:Phenols; D010938:Plant Oils; D002245:Carbon Dioxide; C005686:sodium carbonate; D012972:Sodium Hydroxide
keywords: Alkaline catalyst; Biomass; Catalytic pyrolysis; Methoxyaromatics