title: Utilization of fly ash-derived HZSM-5: catalytic pyrolysis of Jatropha wastes in a fixed-bed reactor.
abstract: Fly ash-derived HZSM-5 catalyst was first applied in the catalytic pyrolysis of Jatropha residues in a semi-continuous fixed-bed reactor. The catalytic performance of HZSM-5 catalysts prepared from chemicals including conventional hydrothermal HZSM-5, Ni/HZSM-5 by ion exchange, and commercial HZSM-5 (Si/Al = 30) was evaluated for comparison. Catalytic pyrolysis of Jatropha residues with HZSM-5 catalysts was investigated in terms of product yields and qualities of bio-oil and bio-char. The liquid yield produced from fly ash-derived HZSM-5 was 29.4%, which was comparable to those obtained from chemicals and commercial (30.2-32.2%). Fly ash-derived HZSM-5 had high efficiency in increasing desirable compounds such as aliphatics and phenols as well as decreasing oxygenates and particularly N-containing compounds in bio-oils. The higher heating values and pH value of catalytic bio-oil achieved from fly ash-derived HZSM-5 were comparable to those achieved from HZSM-5 prepared from chemicals and commercial. The bio-char had 48-50 wt% carbon and was classified as mesoporous material. Overall, HZSM-5 derived from fly ash showed potentials to use as a catalyst for catalytic pyrolysis application.
authors.affiliation: a Ceramics Technology Research Unit , National Metal and Materials Technology Center , Pathumthani , Thailand.
authors.forename: S
authors.initials: S
authors.lastname: Vichaphund
authors.affiliation: b Department of Environmental Engineering, Faculty of Engineering , Chulalongkorn University , Bangkok , Thailand.|c Energy Research Institute, Chulalongkorn University , Bangkok , Thailand.
authors.forename: V
authors.initials: V
authors.lastname: Sricharoenchaikul
authors.affiliation: a Ceramics Technology Research Unit , National Metal and Materials Technology Center , Pathumthani , Thailand.
authors.forename: D
authors.initials: D
authors.lastname: Atong
mesh_terms: D056804:Biofuels / Q000032:analysis; D002384:Catalysis; D002606:Charcoal / Q000032:analysis; D060729:Coal Ash / Q000737:chemistry*; D006358:Hot Temperature; D007474:Ion Exchange; D031286:Jatropha; D009532:Nickel / Q000737:chemistry; D017641:Zeolites / Q000737:chemistry*
chemical_list: D056804:Biofuels; D060729:Coal Ash; C540010:biochar; D017641:Zeolites; D002606:Charcoal; D009532:Nickel
keywords: Fly ash; HZSM-5; Jatropha; bio-oil; pyrolysis