Performance of an IGCC plant with carbon capture and coal - CO2 - slurry feed / Cristina Botero in Industrial & engineering chemistry research, Vol. 51 N° 36 (Septembre 2012)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 51 N° 36 (Septembre 2012) . - pp. 11778-11790 Titre : Performance of an IGCC plant with carbon capture and coal - CO2 - slurry feed : Impact of coal rank, slurry loading, and syngas cooling technology Type de document : texte imprimé Auteurs : Cristina Botero, Auteur ; Randall P. Field, Auteur ; Robert D. Brasington, Auteur Année de publication : 2012 Article en page(s) : pp. 11778-11790 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Cooling Synthesis gas Loading Carbon dioxide Coal Résumé : The high heat capacity and latent enthalpy of vaporization of water lead to a low gasification efficiency in gasifiers fed with coal-water slurry. Liquid carbon dioxide, CO2(1), has been suggested as an alternative slurrying medium to improve the efficiency of low-rank coal gasification in integrated gasification combined cycle power plants with carbon capture. Steady-state process simulation is used in this work to confirm published findings and present a comprehensive assessment of the impact of the coal rank, gasifier cooling technology, and CO2 slurry loading uncertainty on the performance advantage of CO2 slurry-fed plants. A power generation efficiency improvement of up to 25% (5%-points) is predicted, which is shown to increase with decreasing coal rank and to be highest for full-quench gasifier cooling technology; the latter is a significant source of capital cost savings and is especially attractive when combined with CO2 slurry feed. Using CO2(1) instead of water slurry reduces the performance penalty of low-rank coal gasification by half, thus substantially improving the feedstock flexibility of the plant. With a single exception, the performance benefit of coal-CO2 slurry was found to be outside the uncertainty range of the slurry loading, which is still one of the key unknowns of this alternative feed system. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26350345 [article] Performance of an IGCC plant with carbon capture and coal - CO2 - slurry feed : Impact of coal rank, slurry loading, and syngas cooling technology [texte imprimé] / Cristina Botero, Auteur ; Randall P. Field, Auteur ; Robert D. Brasington, Auteur . - 2012 . - pp. 11778-11790. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 36 (Septembre 2012) . - pp. 11778-11790 Mots-clés : Cooling Synthesis gas Loading Carbon dioxide Coal Résumé : The high heat capacity and latent enthalpy of vaporization of water lead to a low gasification efficiency in gasifiers fed with coal-water slurry. Liquid carbon dioxide, CO2(1), has been suggested as an alternative slurrying medium to improve the efficiency of low-rank coal gasification in integrated gasification combined cycle power plants with carbon capture. Steady-state process simulation is used in this work to confirm published findings and present a comprehensive assessment of the impact of the coal rank, gasifier cooling technology, and CO2 slurry loading uncertainty on the performance advantage of CO2 slurry-fed plants. A power generation efficiency improvement of up to 25% (5%-points) is predicted, which is shown to increase with decreasing coal rank and to be highest for full-quench gasifier cooling technology; the latter is a significant source of capital cost savings and is especially attractive when combined with CO2 slurry feed. Using CO2(1) instead of water slurry reduces the performance penalty of low-rank coal gasification by half, thus substantially improving the feedstock flexibility of the plant. With a single exception, the performance benefit of coal-CO2 slurry was found to be outside the uncertainty range of the slurry loading, which is still one of the key unknowns of this alternative feed system. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26350345

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