Document Type

Journal Article

Publication Title

Fuel

Volume

392

Publisher

Elsevier

School

Centre for Sustainable Energy and Resources / School of Engineering

Comments

Matamba, T., Abid, H. R., Keshavarz, A., & Iglauer, S. (2025). H2-rich biogas production from fixed bed wheat straw pyrolysis and the potential of produced biochar as H2 storage material. Fuel, 392, 134926. https://doi.org/10.1016/j.fuel.2025.134926

Abstract

H2 is a clean energy source, and is targeted as one of the ways to transition from fossil fuels. However, there are drawbacks in production and storage of hydrogen. To cover the supply, we need H2 from many resources and because of its low density we need materials that can store bulky quantities of H2. Here we investigated the potential of a renewable source (waste wheat straw) to produce and store H2 through pyrolysis and adsorption. The impact of pressure and temperature (500–900 °C, and 1.01–30 bar range) on the selectivity of H2 rich gas production was systematically investigated; and temperature displayed more influence towards H2 formation. Increasing temperature and pressure increased H2 production (which peaked to 86.07 vol% at 800 °C and 30 bar). The surface area and pore volume of the by-produced biochar increased with temperature; thus, the biochar was tested in terms of its H2 storage capacity (at atmospheric and cryogenic temperatures, i.e. 30 °C and −196.0 °C and under vacuum to 70 bar pressure). The maximum H2 adsorption capacity at ambient temperature was 2.50 mol/kg at 66.33 bar (for 900 °C biochar) which significantly increased to 15.29 mol/kg at cryogenic temperature at 46.21 bar. This study therefore provides fundamental data and novel methods with which H2 can be produced and stored, thus aiding in the full-scale implementation of a hydrogen economy.

DOI

10.1016/j.fuel.2025.134926

Creative Commons License

Creative Commons Attribution 4.0 License
This work is licensed under a Creative Commons Attribution 4.0 License.

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