Catalytic conversion of Laminaria japonica over microporous zeolites

Hyung Won Lee, Suek Joo Choi, Sung Hoon Park, Jong Ki Jeon, Sang Chul Jung, Sang Hoon Joo, Young Kwon Park

Research output: Contribution to journalArticlepeer-review

51 Scopus citations

Abstract

The catalytic pyrolysis of Laminaria japonica was carried out over four different microporous zeolite catalysts, HZSM-5 (SiO2/Al2O3=23, 80), HBETA (SiO2/Al2O3=25) and HY (SiO2/Al2O3=30). The effects of the catalysts on the properties of the resulting pyrolysis products were examined. Py-GC/MS (pyrolysis gas chromatography/mass spectrometry) was used to compare the composition of the bio-oils obtained from the non-catalytic and catalytic pyrolysis. Catalytic upgrading decreased the oil yield but increased the gas yield. The composition of bio-oil was changed to a large extent by catalytic upgrading. Among the oxygenate species contained in the bio-oil, the contents of 1,5-anhydro-d-mannitol and 1,4-anhydro-d-galacitol were reduced considerably by catalytic upgrading, whereas the proportions of furans and cyclopentanones were increased. The formation of high value-added aromatics was enhanced considerably by catalytic upgrading, which was attributed to the acid characteristics of the zeolite catalysts. HZSM-5 (SiO2/Al2O3=23), which had the strongest acid sites, showed the highest selectivity for aromatics production.

Original languageEnglish
Pages (from-to)2-6
Number of pages5
JournalEnergy
Volume66
DOIs
StatePublished - 1 Mar 2014

Keywords

  • Aromatics
  • Catalytic pyrolysis
  • Laminaria japonica
  • Microporous zeolites

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