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Impact of siloxane impurities on the performance of an engine operating on renewable natural gas / Nitin Nair in Industrial & engineering chemistry research, Vol. 51 N° 48 (Décembre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 48 (Décembre 2012) . - pp. 15786-15795 Titre : Impact of siloxane impurities on the performance of an engine operating on renewable natural gas Type de document : texte imprimé Auteurs : Nitin Nair, Auteur ; Xianwei Zhang, Auteur ; Jorge Gutierrez, Auteur Année de publication : 2013 Article en page(s) : pp. 15786-15795 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Natural  gas  Impurity Résumé : An internal combustion engine operating on natural gas (NG) spiked with siloxanes has been studied experimentally with the goal of understanding the impact of siloxane impurities on engine performance. These impurities are shown to completely decompose during NG combustion in the engine to form silica microparticulates. These coat the internal metal surfaces in the engine (e.g., the piston heads) as well as the engine's oxygen sensors and spark-plugs, and they also collect in the engine oil. A certain fraction of them, furthermore, are carried out of the engine in the flue-gas, and they deposit inside a catalyst monolith bed placed downstream of the engine resulting in its severe deactivation. These engine studies are consistent with prior fundamental studies by this team that indicate that siloxane impurities readily decompose in the NG combustion environment to form silica particulates that coat exposed metal surfaces. They also point out the critical importance for engine performance of adequately removing these siloxane impurities from NG prior to its use. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26710615 [article] Impact of siloxane impurities on the performance of an engine operating on renewable natural gas [texte imprimé] / Nitin Nair, Auteur ; Xianwei Zhang, Auteur ; Jorge Gutierrez, Auteur . - 2013 . - pp. 15786-15795. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 48 (Décembre 2012) . - pp. 15786-15795 Mots-clés : Natural  gas  Impurity Résumé : An internal combustion engine operating on natural gas (NG) spiked with siloxanes has been studied experimentally with the goal of understanding the impact of siloxane impurities on engine performance. These impurities are shown to completely decompose during NG combustion in the engine to form silica microparticulates. These coat the internal metal surfaces in the engine (e.g., the piston heads) as well as the engine's oxygen sensors and spark-plugs, and they also collect in the engine oil. A certain fraction of them, furthermore, are carried out of the engine in the flue-gas, and they deposit inside a catalyst monolith bed placed downstream of the engine resulting in its severe deactivation. These engine studies are consistent with prior fundamental studies by this team that indicate that siloxane impurities readily decompose in the NG combustion environment to form silica particulates that coat exposed metal surfaces. They also point out the critical importance for engine performance of adequately removing these siloxane impurities from NG prior to its use. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26710615