Analysis of damage caused by siloxanes in stationary reciprocating internal combustion engines operating with landfill gas
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10.1016/j.engfailanal.2015.01.010
Inclou dades d'ús des de 2022
Cita com:
hdl:2117/27887
Tipus de documentArticle
Data publicació2015-02-04
EditorElsevier
Condicions d'accésAccés obert
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Reconeixement-NoComercial-SenseObraDerivada 3.0 Espanya
Abstract
Failures in reciprocating internal combustion engines operating with landfill gas are not uncommon. In general, damage is located in the combustion chamber surfaces and in the ring grooves, where a layer of non-volatile
combustion products is deposited. These deposits attached to the surfaces reduce heat transfer and increase inner temperature, which produces a knocking phenomena damaging the crank bearings and fusing of the piston head
material. Lubrication problems also appear due to the formation of a layer of soft paste silicone deposits in the rings grooves, which increases friction losses and accelerates wear on cylinder and rings.
In this paper, some typical examples of damaged engines are presented. The deposits found were analysed using Scanning Electron Microscope and Energy Dispersive X-ray Spectroscopy (SEM–-EDX). Additionally, the
engine oil used was also analysed by Infra-Red Spectrometry (IR) and the results were compared with known organo-compounds. A method to detect incipient failure caused by organo-compounds contained in landfill gas is
introduced.
Silica appears in the layers covering the combustion chamber, as well as silicone compound in the top cylinder zone, piston and ring grooves. Damage is associated with siloxanes (organo-silicon compounds) contained in the
landfill gas, which decompose in the combustion chamber, generating silicic acid and formaldehyde under the high temperature conditions throughout the combustion processes.
CitacióAlvarez, J.; Egusquiza, E. Analysis of damage caused by siloxanes in stationary reciprocating internal combustion engines operating with landfill gas. "Engineering failure analysis", 04 Febrer 2015, vol. 50, p. 29-38.
ISSN1350-6307
Versió de l'editorhttp://www.sciencedirect.com/science/article/pii/S1350630715000321
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