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Intensification of two-stage biomass gasification for hydrogen production

Lookup NU author(s): Jirat Mankasem, Phuet Prasertcharoensuk, Professor Anh Phan

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This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).

Abstract

© 2023. Hydrogen production from wood pellets was investigated using a modulus two-stage gasification. The results showed that up to 88 mg H2/g wood pellets, which is 1.3 times higher than the theoretical hydrogen from feedstock (around 65 mg/g), was obtained at temperatures below 1000 °C. Combining CO2 and steam as gasifying agents resulted in a 6% increase in the gas yield and up to 93% reduction in tar content (0.03g/Nm3) compared to steam gasification (0.5–0.7 g/Nm3). Although the hydrogen content in the gas stream was similar in both cases of steam and CO2-steam gasification (88 mg/g pellets), the CO2 content in the gas stream from CO2-steam gasification was reduced by 12%–17% compared with steam gasification. The H2/CO ratio in the gas stream was between 3.2 and 3.8 for steam gasification and 1.6–2.3 for CO2-steam gasification. The cold gas efficiency (a ratio of calorific value of products to that of wood pellets) of CO2-steam gasification was up to 14–16% higher than that of steam-gasification due to higher CO content in the gas. It can be concluded that using CO2- steam two-stage gasification increases the process efficiency and sustainability by utilising carbon source in CO2 emission.

Publication metadata

Author(s): Mankasem J, Prasertcharoensuk P, Phan AN

Publication type: Article

Publication status: Published

Journal: International Journal of Hydrogen Energy

Year: 2024

Volume: 49

Issue: Part A

Pages: 189-202

Print publication date: 02/01/2024

Online publication date: 26/08/2023

Acceptance date: 20/07/2023

Date deposited: 22/09/2023

ISSN (print): 0360-3199

ISSN (electronic): 1879-3487

Publisher: Elsevier Ltd

URL: https://doi.org/10.1016/j.ijhydene.2023.07.212

DOI: 10.1016/j.ijhydene.2023.07.212

ePrints DOI: 10.57711/96n5-nn35

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