Supercritical water oxidation of coal in power plants with low CO2 emissions

Franco Donatini, Gianluca Gigliucci, Juri Riccardi, Massimo Schiavetti, Roberto Gabbrielli and Stefano Briola

Energy, 2009, vol. 34, issue 12, 2144-2150

Abstract: In this paper, the application of Super Critical Water Oxidation (SCWO) to direct combustion at low temperature of coal fine particles with pure oxygen for power generation is presented, including also a novel method for capturing and storing carbon dioxide as liquid. A detailed simulation model of a 100MWth coal-fired SWCO plant with low CO2 emissions characterised by a steam cooled membraned SC reactor has been developed using Aspen Plus software. According to the well-known Semenov's thermal-ignition theory, the coal particle ignition temperature in SCW conditions has been also evaluated and the results have been integrated within the Aspen Plus model. This has been tested under different operating conditions. The simulation results are presented and the effects of the main plant operating conditions, such as ignition temperature, coal particle size and combustion pressure on the plant performances are discussed. The gross and net thermodynamic efficiencies of the power plant have been estimated to be around 44% and 28%, respectively. The pure oxygen production process results the main energy penalty.

Keywords: Supercritical water oxidation; Coal clean combustion; Low CO2 emissions (search for similar items in EconPapers)
Date: 2009
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (6)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:34:y:2009:i:12:p:2144-2150

DOI: 10.1016/j.energy.2008.09.021

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