Energyplexes for the 21st Century: Coal Gasification for Co-Producing Hydrogen, Electricity and Liquid Fuels

Yamashita, K. & Barreto, L. (2005). Energyplexes for the 21st Century: Coal Gasification for Co-Producing Hydrogen, Electricity and Liquid Fuels. IIASA Research Report (Reprint). IIASA, Laxenburg, Austria: RP-05-005. Reprinted from Energy, 30(13):2453-2473 [2005]. 10.1016/j.energy.2004.12.002.

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Abstract

This paper illustrates the role that integrated energy systems, also known as 'energyplexes', could play in supplying energy demands in the long term. These systems could enable a multi-fuel, multi-product strategy with both economic and environmental benefits. they could increase the adaptability and robustness of energy-services companies in the market place, providing them with flexibility in meeting demands in different market segments while achieving lower production costs and, reducing the risks of reliance on a single feedstock. In addition, with the possibility of achieving high conversion efficiencies and low polluting emissions and facilitating carbon capture, they could deliver high-quality energy services and cost-effective way while meeting stringent environmental requirements. Their potential is highlighted here using the case of coal-fired, synthesis-gas-based gasification systems that allow co-producing hydrogen, electricity and liquid fuels, i.e. Fischer-Tropsch liquids and methanol, and could be a key building block in a clean-coal technology strategy. Co-production, also known as poly-generation, strategies may contribute to improve the economics of the system and exploit potential synergies between the constituent processes. However, the technical feasibility and economic viability of poly-generation schemes have to be examined carefully on a case-by-case basis.

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