Open AccessImpact of a CO2-Enriched Gas on the Decarbonation of CaCO3 and the Oxidation of Carbon in the Smoldering Process of Oil Shale Semicoke
Author(s) -
Mohamed Sennoune,
Sylvain Salvador,
Gérald Debenest
Publication year - 2011
Publication title -
energy and fuels
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.861
H-Index - 186
eISSN - 1520-5029
pISSN - 0887-0624
DOI - 10.1021/ef201304n
Subject(s) - oil shale , carbon fibers , fossil fuel , materials science , process (computing) , chemical engineering , work (physics) , environmental science , petroleum engineering , mineralogy , waste management , chemistry , geology , composite material , thermodynamics , engineering , composite number , computer science , operating system , physics
Sino-Australian Symposium on Advanced Coal and Biomass Utilisation Technologies, Wuhan, PEOPLES R CHINA, DEC 09-11, 2011International audienceOne way of recovering oil is to propagate a co-current feed smoldering front in oil shale. This can be performed either in situ or as an ex situ process. Smoldering in oil shale semicoke achieves both thermal valorization and carbon release. In both cases, two phenomena cause CO2 formation and release: the oxidation of fixed carbon and the decarbonation of CaCO3. It is shown in this work that enriching the gas fed to the front with CO2 significantly impacts both phenomena, potentially in a positive way: (i) the oxidation of fixed carbon to CO is encouraged, leading to the production of a richer gas and limiting the amount of CO2 formed, and (ii) the decarbonation of CaCO3 is limited, which also contributes to reducing the formation of CO2
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