Highly valuable chemicals production from catalytic upgrading of radiata pine sawdust-derived pyrolytic vapors over mesoporous MFI zeolites

Hyun Ju Park, Hyeon Su Heo, Jong Ki Jeon, Jeongnam Kim, Ryong Ryoo, Kwang Eun Jeong, Young Kwon Park

Research output: Contribution to journalArticlepeer-review

250 Scopus citations

Abstract

The catalytic upgrading of pyrolytic vapors derived from radiata pine sawdust was carried out over mesoporous MFI zeolite synthesized using an amphiphilic organosilane. Its catalytic activity was compared with those of conventional HZSM-5 and mesoporous material from HZSM-5 (MMZZSM-5). The effect of gallium incorporation into mesoporous MFI zeolite on the product distribution and chemical composition of bio-oil was also investigated. The catalysts synthesized were characterized using ICP, XRD, N2-sorption, NH3-TPD, and H2-TPR methods. After catalytic upgrading, products were analyzed by GC-TCD, GC-FID, GC-MS, and Karl Fischer titration. The mesoporous MFI zeolite exhibited the best activity in deoxygenation and aromatization during the upgrading of pyrolytic vapors. In particular, mesoporous MFI zeolite showed high selectivity for highly valuable aromatics, such as benzene, toluene, and xylenes (BTX), even though it decreased the overall organic fraction of the bio-oil. The incorporation of gallium into the mesoporous MFI zeolite increased both the organic fraction of the bio-oil and resistance to coke deposition. Moreover, the selectivity for BTX aromatics was enhanced when the appropriate amount of gallium was introduced.

Original languageEnglish
Pages (from-to)365-373
Number of pages9
JournalApplied Catalysis B: Environmental
Volume95
Issue number3-4
DOIs
StatePublished - 6 Apr 2010

Keywords

  • BTX aromatics
  • Catalytic upgrading
  • Fast pyrolysis
  • Gallium
  • Mesoporous MFI zeolite

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