Integrated Process Configuration for High-Temperature Sulfur Mitigation during Biomass Conversion via Indirect Gasification

Abhijit Dutta, Singfoong Cheah, Richard Bain, Calvin Feik, Kim Magrini-Bair, Steven Phillips

Research output: Contribution to journalArticlepeer-review

8 Scopus Citations

Abstract

Sulfur present in biomass often causes catalyst deactivation during downstream operations after gasification. Early removal of sulfur from the syngas stream post-gasification is possible via process rearrangements and can be beneficial for maintaining a low-sulfur environment for all downstream operations. High-temperature sulfur sorbents have superior performance and capacity under drier syngas conditions. The reconfigured process discussed in this paper is comprised of indirect biomass gasification using dry recycled gas from downstream operations, which produces a drier syngas stream and, consequently, more-efficient sulfur removal at high temperatures using regenerable sorbents. A combination of experimental results from NREL's fluidizable Ni-based reforming catalyst, fluidizable Mn-based sulfur sorbent, and process modeling information show that using a coupled process of dry gasification with high-temperature sulfur removal can improve the performance of Ni-based reforming catalysts significantly.

Original languageAmerican English
Pages (from-to)8326-8333
Number of pages8
JournalIndustrial and Engineering Chemistry Research
Volume51
Issue number24
DOIs
StatePublished - 20 Jun 2012

NREL Publication Number

  • NREL/JA-510-49321

Keywords

  • biomass
  • dry recycled gas
  • gasification
  • sulfur
  • syngas

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