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Biomethanol production from gasification of non-woody plant in South Africa: Optimum scale and economic performance

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  • Amigun, Bamikole
  • Gorgens, Johann
  • Knoetze, Hansie

Abstract

Methanol production from biomass is a promising carbon neutral fuel, well suited for use in fuel cell vehicles (FCVs), as transportation fuel and as chemical building block. The concept used in this study incorporates an innovative Absorption Enhanced Reforming (AER) gasification process, which enables an efficient conversion of biomass into a hydrogen-rich gas (syngas) and then, uses the Mitsubishi methanol converter (superconverter) for methanol synthesis. Technical and economic prospects for production of methanol have been evaluated. The methanol plants described have a biomass input between 10 and 2000Â MWth. The economy of the methanol production plants is very dependent on the production capacity and large-scale facilities are required to benefit from economies of scale. However, large-scale plants are likely to have higher transportation costs per unit biomass transported as a result of longer transportation distances. Analyses show that lower unit investment costs accompanying increased production scale outweighs the cost for transporting larger quantities of biomass. The unit cost of methanol production mostly depends on the capital investments. The total unit cost of methanol is found to decrease from about 10.66Â R/l for a 10Â MWth to about 6.44Â R/l for a 60Â MWth and 3.95Â R/l for a 400Â MWth methanol plant. The unit costs stabilise (a near flat profile was observed) for plant sizes between 400 and 2000Â MWth, but the unit cost do however continue to decrease to about 2.89Â R/l for a 2000Â MWth plant. Long term cost reduction mainly resides in technological learning and large-scale production. Therefore, technology development towards large-scale technology that takes into account sustainable biomass production could be a better choice due to economic reasons.

Suggested Citation

  • Amigun, Bamikole & Gorgens, Johann & Knoetze, Hansie, 2010. "Biomethanol production from gasification of non-woody plant in South Africa: Optimum scale and economic performance," Energy Policy, Elsevier, vol. 38(1), pages 312-322, January.
  • Handle: RePEc:eee:enepol:v:38:y:2010:i:1:p:312-322
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    References listed on IDEAS

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    Cited by:

    1. Musango, Josephine K. & Brent, Alan C., 2011. "Assessing the sustainability of energy technological systems in Southern Africa: A review and way forward," Technology in Society, Elsevier, vol. 33(1), pages 145-155.
    2. Patel, Madhumita & Zhang, Xiaolei & Kumar, Amit, 2016. "Techno-economic and life cycle assessment on lignocellulosic biomass thermochemical conversion technologies: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 53(C), pages 1486-1499.

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    Gasification Syngas Methanol;

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