You need JavaScript to view this

Formation and removal of biomass-derived contaminants in fluidized-bed gasification processes

Abstract

The objectives of this thesis were to examine the effects of the feedstock and the operating conditions of a fluidized-bed gasifier on the formation of tars and nitrogen-containing compounds and to study the effectiveness of the hot gas cleaning methods developed for the removal of particulates, alkali metals, tars and nitrogen-containing compounds. The most essential part of the work was carried out in the pressurized fluidized-bed gasification test facilities composed of an air-blown bubbling fluidized-bed gasifier and subsequent hot gas filter unit. The operation pressure of the test rig could be varied in the range 0.3 - 1.0 MPa and the maximum allowable gasification temperature was 1 050 deg C. The maximum capacity with biomass fuels was 80 kg/h. A wide range of feedstocks from hard coals, lignite and peat to different wood derived fuels and straw were used in the gasification tests. Two different types of ceramic filters were tested in the filter unit connected to the pressurized fluidized-bed gasifier. The filter unit was operated in a temperature range of 400 - 740 deg C. The particulate removal requirements set by the gas turbines were met by both types of filters and with product gases derived from all the  More>>
Authors:
Kurkela, E [1] 
  1. VTT Energy, Espoo (Finland). Energy Production Technologies
Publication Date:
Dec 31, 1996
Product Type:
Technical Report
Report Number:
VTT-PUB-287
Reference Number:
SCA: 010404; 090900; PA: FI-97:003179; EDB-97:038479; NTS-97:007836; SN: 97001745092
Resource Relation:
Other Information: PBD: 1996
Subject:
01 COAL, LIGNITE, AND PEAT; 09 BIOMASS FUELS; GASIFICATION; FLUIDIZED BEDS; BIOMASS; PEAT; COAL; TAR; NITROGEN COMPOUNDS; ALKALI METALS; PARTICULATES; PRESSURIZATION; FILTRATION; BENCH-SCALE EXPERIMENTS
OSTI ID:
442486
Research Organizations:
Technical Research Centre of Finland, Espoo (Finland)
Country of Origin:
Finland
Language:
English
Other Identifying Numbers:
Other: ON: DE97730555; ISBN 951-38-4945-7; TRN: FI9703179
Availability:
OSTI as DE97730555
Submitting Site:
FI
Size:
135 p.
Announcement Date:

Citation Formats

Kurkela, E. Formation and removal of biomass-derived contaminants in fluidized-bed gasification processes. Finland: N. p., 1996. Web.
Kurkela, E. Formation and removal of biomass-derived contaminants in fluidized-bed gasification processes. Finland.
Kurkela, E. 1996. "Formation and removal of biomass-derived contaminants in fluidized-bed gasification processes." Finland.
@misc{etde_442486,
title = {Formation and removal of biomass-derived contaminants in fluidized-bed gasification processes}
author = {Kurkela, E}
abstractNote = {The objectives of this thesis were to examine the effects of the feedstock and the operating conditions of a fluidized-bed gasifier on the formation of tars and nitrogen-containing compounds and to study the effectiveness of the hot gas cleaning methods developed for the removal of particulates, alkali metals, tars and nitrogen-containing compounds. The most essential part of the work was carried out in the pressurized fluidized-bed gasification test facilities composed of an air-blown bubbling fluidized-bed gasifier and subsequent hot gas filter unit. The operation pressure of the test rig could be varied in the range 0.3 - 1.0 MPa and the maximum allowable gasification temperature was 1 050 deg C. The maximum capacity with biomass fuels was 80 kg/h. A wide range of feedstocks from hard coals, lignite and peat to different wood derived fuels and straw were used in the gasification tests. Two different types of ceramic filters were tested in the filter unit connected to the pressurized fluidized-bed gasifier. The filter unit was operated in a temperature range of 400 - 740 deg C. The particulate removal requirements set by the gas turbines were met by both types of filters and with product gases derived from all the feedstocks tested. In addition to the gasification and gas filtration tests, catalytic tar and ammonia decomposition was studied using both laboratory and bench-scale test facilities. Inexpensive calcium-based bulk materials, dolomites and limestones, were efficient tar decomposition catalysts in atmospheric-pressure tests}
place = {Finland}
year = {1996}
month = {Dec}
}