Sewage and textile sludge co-gasification using a lab-scale fluidized bed gasifier

Van Thang Nguyen, Kung Yuh Chiang

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

This research aims to evaluate the hydrogen production and removal ability of impurity (e.g. tar and NH3) generated from sewage and textile sludge co-gasification using lab-scale fluidized-bed gasifier with an integrated hot-gas cleaning system. The gasification temperature and equivalence ratio (ER) were controlled at 850 °C and 0.2, as well as the hot gas cleaning system operated at 250 °C with the combination of zeolite, calcined dolomite, and activated carbon. Experimental results indicated that the H2 and CO yield in co-gasification of the tested sludge ranged from 2.12 to 2.45 mol/kg and from 2.83 to 3.98 mol/kg, respectively. The overall energy content of produced gas ranged between 2.40 and 2.63 MJ/kg, and cold gas efficiency (CGE) was nearly 15%. The impurities of produced gas were effectively mitigated by the hot-gas cleaning system, which could remove approximately 90% of the heavy fraction tar, up to 77% of total tar, and about 35% of ammonia. In summary, the combination of the fluidized-bed gasifier and the hot-gas cleaning system had been well developed for purifying the syngas produced from the tested sludge, and it could be applied to other organic wastes in the future.

Original languageEnglish
JournalInternational Journal of Hydrogen Energy
DOIs
StateAccepted/In press - 2021

Keywords

  • Co-gasification
  • Energy recovery
  • Hot-gas cleaning system
  • Impurity mitigation
  • Sewage sludge
  • Textile sludge

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