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- W1023696101 abstract "This paper presents a model to perform energy balances and estimate hydrogen conversion efficiency from UCG-based syngas. The model was developed for H2 production from UCG-based syngas with and without CCS, along with the co-production of electricity and steam in a conventional combined cycle plant. In this paper, at base case conditions (H2O-to-O2 injection ratio of 2 and a steam-to-carbon ratio of 3), the coal-to-H2 conversion efficiency is estimated to be 58.1% for UCG with and without CCS. For the plant configuration involving no CCS, in addition to H2 production, approximately 4.7% of coal energy is converted to electricity that is exported to the grid. In the case of UCG–CCS, a minor energy penalty is incurred; wherein the electrical energy exported per unit coal energy is around 2.4%, with a CO2 capture efficiency of 91.6% being achieved. The H2 conversion efficiency decreases with rise in H2O-to-O2 injection ratio, but increases with fall in steam-to-carbon ratio. Effect of ground water influx in UCG on the H2 conversion efficiency is minor, whereas H2 separation efficiency in the pressure swing adsorption (PSA) unit has a major effect." @default.
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- W1023696101 date "2015-09-01" @default.
- W1023696101 modified "2023-09-25" @default.
- W1023696101 title "Development of a process simulation model for energy analysis of hydrogen production from underground coal gasification (UCG)" @default.
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- W1023696101 doi "https://doi.org/10.1016/j.ijhydene.2015.06.149" @default.
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