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Title: | Evaluation of the economic feasibility of a two-stage gasification system for hydrogen, liquid fuels and energy production from residues |
Authors: | Kargbo, HO Ng, KS Phan, AN |
Keywords: | two-stage gasification;hydrogen;gasification-to-liquid fuels;gasification-to-hydrogen;syngas;economic of scales |
Issue Date: | 25-Dec-2021 |
Publisher: | Elsevier |
Citation: | Kargbo, H.O., Ng, K.S. and Phn, A.N. (2022) 'Evaluation of the economic feasibility of a two-stage gasification system for hydrogen, liquid fuels and energy production from residues', Energy Conversion and Management, 253, 115126, pp. 1 - 10. doi: /10.1016/j.enconman.2021.115126. |
Abstract: | Although two-stage gasifier design offers a number of advantages i.e., producing high-quality gas (high H2 content, low CO2 and other impurities) and tolerating high degree of heterogeneity of feedstock, its economic feasibility is yet to be evaluated. In this study, a techno-economic assessment is fully conducted to assess the economic feasibility of a two-stage gasification system for three routes: hydrogen production, liquid fuels via Fischer-Tropsch synthesis, and electricity production from biomass. For a two-stage gasification of 20 years at a plant size of 1000 dry t/d, the total capital investment for hydrogen, FT-liquid and electricity production are US $214.8 million, US $345.5 million and US $307 million with operating costs of US $35.6 million/y, US $62.2 million/y and US $48.6 million/y, respectively. The minimum selling price for hydrogen (at a pressure of 70 bar) and liquid fuel from biomass is comparable to that from fossil fuels (US $1.59/kg for H2 and US $1,109/m3 for liquid fuel) whereas for electricity (US $ 0.09/kWh), it is around half of the current electricity price from the grid in the UK. Comparing to conventional fluidised bed gasification for the same feedstock, around 25% cost reduction can be achieved for either hydrogen or liquid fuel production but only around 10% reduction for electricity. The results also show that the economics of the system can be improved further by 35–40% if the cost of feedstock is reduced by 30–50% at large-scale production facility (≥2000 dry t/d). |
Description: | Supplementary data are available online at https://www.sciencedirect.com/science/article/pii/S0196890421013029?via%3Dihub#s0090 . |
URI: | http://bura.brunel.ac.uk/handle/2438/26626 |
DOI: | http://dx.doi.org/10.1016/j.enconman.2021.115126 |
ISSN: | 0196-8904 |
Other Identifiers: | ORCID iD: Kok Siew Ng https://orcid.org/0000-0001-7689-2832 115126 |
Appears in Collections: | Dept of Chemical Engineering Research Papers |
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