Production of synthesis gas from biomass residues by staged fixed-bed gasification - results from pilot test campaigns

Esa Kurkela (Corresponding Author), Minna Kurkela, Ilkka Hiltunen

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Fluidized-bed and entrained-flow gasification systems are developed for large-scale synthesis gas applications with at least 100 MW biomass input. However, there is also a market need for smaller-scale plants, which could be better integrated into energy production systems and local biomass logistics. The staged fixed-bed (SXB) gasifier described in this paper targets a size range of 10-50 MW of feedstock input. The primary gasification stage occurs in an updraft fixed bed. The tar-containing updraft gas is further processed in the secondary gasification zone, where gas temperature is raised from 200-500 °C to 750-900 °C by feeding secondary oxygen through a specially designed catalytic distributor zone. The composition and tar content of the resulting raw gas is similar to that of fluidized-bed gasifiers. Consequently, hot gas filtration, catalytic reforming and final gas cleaning technologies, similar to those recently developed and demonstrated for fluidized-bed gasifiers, can be applied. The results from the 0.5 MW pilot gasification tests carried out with wood, bark and sunflower husk pellets are presented in this paper.

Original languageEnglish
Pages (from-to)7-12
Number of pages6
JournalChemical Engineering Transactions
Volume86
DOIs
Publication statusPublished - 2021
MoE publication typeA1 Journal article-refereed

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