Acetaldehyde removal and increased H2/CO gas yield from biomass gasification over metal-loaded Kraft lignin char catalyst

Ki Hoon Kim, Abid Farooq, Min Young Song, Sang Chul Jung, Ki Joon Jeon, Ji Hyeon Song, Chang Hyun Ko, Jungho Jae, Young Kwon Park

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

Acetaldehyde removal tests were performed to compare the catalytic activity of the Kraft lignin char (KC), KOH-treated Kraft lignin char (KKC), and activated carbon (AC) along with their impregnation with Mn in a plasma reactor. The gasification characteristics (syngas content, and H2/CO ratio) of yellow poplar were investigated using nickel catalysts supported on KC, KKC, AC, and γ-Al2O3 in a U-type quartz reactor. KKC and Mn/KKC improved significantly the surface area and contents of O and N functional groups over the raw char. In particular, Mn/KKC showed the highest acetaldehyde-removal efficiency. The catalytic activity of Ni-impregnated KC, KKC, AC, and γ-Al2O3 decreased in the order of Ni/KKC > Ni/AC > Ni/KC > Ni/γ-Al2O3 for the gas yield and Ni/γ-Al2O3 >Ni/KC > Ni/AC >Ni/KKC for the oil yield, respectively. The Ni/KKC provides a more conducive environment for gasification, resulting in larger amounts of syngas (H2 and CO) in the product gases. Moreover, Ni impregnated with char may be the most inexpensive and effective solution for achieving maximum tar reduction and syngas generation.

Original languageEnglish
Pages (from-to)330-335
Number of pages6
JournalJournal of Environmental Management
Volume232
DOIs
StatePublished - 15 Feb 2019

Keywords

  • Acetaldehyde removal
  • Biomass
  • Catalyst
  • Gasification
  • Kraft lignin char
  • Plasma

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