Please use this identifier to cite or link to this item: https://hdl.handle.net/2440/116935
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Type: Journal article
Title: Removal of NH₃ and H₂S from producer gas in a dual fluidised bed steam gasifier by optimisation of operation conditions and application of bed materials
Other Titles: Removal of NH(3) and H(2)S from producer gas in a dual fluidised bed steam gasifier by optimisation of operation conditions and application of bed materials
Author: Hongrapipat, J.
Pang, S.
Saw, W.
Citation: Biomass Conversion and Biorefinery, 2016; 6(1):105-113
Publisher: Springer
Issue Date: 2016
ISSN: 2190-6815
2190-6823
Statement of
Responsibility: 
Janjira Hongrapipat, Shusheng Pang, Woei Lean Saw
Abstract: In the present study, in situ removal of ammonia (NH₃) and hydrogen sulphide (H₂S) in the producer gas has been investigated for steam gasification of woody biomass in a 100 kW dual fluidised bed (DFB) gasifier. The removal measures consist of optimisation of operation conditions and application of catalytic bed materials. The operation conditions investigated were gasification temperature in a range of 750 to 850 °C, steam to fuel ratio from 0.6 to 1.4 kg/kgdry, and mean gas residence time from 0.19 to 0.25 s. The catalytic bed materials tested included silica, ilmenite and calcined olivine sands which were applied in the DFB steam gasifier. The concentrations of NH₃ and H₂S in the producer gas were measured and the conversions of fuel nitrogen (N) and sulphur (S) to form NH₃ and H₃S were calculated based on the experimental results. The results showed that NH₃ and H₂S concentrations and conversions increased with the gasification temperature and the steam to fuel ratio. However, with increase in the mean gas residence time, the NH₃ concentration and conversion increased whereas the H₂S concentration and conversion slightly decreased. In addition, ilmenite sand and calcined olivine sand as the bed materials showed stronger influence on reduction of NH₃ and H₂S concentrations as well as fuel-N and fuel-S conversions in comparison with silica sand.
Keywords: Ammonia removal; hydrogen sulphide removal; dual fluidised bed gasifier; operation condition optimisation; catalytic bed materials
Rights: © Springer-Verlag Berlin Heidelberg 2015
DOI: 10.1007/s13399-015-0167-5
Published version: http://dx.doi.org/10.1007/s13399-015-0167-5
Appears in Collections:Aurora harvest 8
Chemical Engineering publications

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