Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Experimental studies on corrosion of cement in CO2 injection wells under supercritical conditions
The corrosion performance of cement exposed to supercritical CO2 environments has been investigated under static and dynamic conditions by SEM, EDS, XRD and physical analysis. The dissimilarity of attack was compared in two exposure conditions i.e. gaseous CO2 and liquid CO2 by measuring compressive strength, permeability and penetration depth. Experimental comparisons showed that cement samples exposed to liquid supercritical CO2 under dynamic conditions exhibited greater reactivity as compared to gaseous supercritical CO2 and displayed distinct changes in the microstructures and distribution of the corrosion products within the cement.The corrosion degree becomes more severe with increasing temperature and exposure time in both phase states of CO2. The temperature and curing time have great effects on degree of corrosion. Cement samples cured in liquid phase reaction tank showed the greatest decrease of compressive strength and increase of permeability and penetration depth as compared to that of cured in gaseous phase reaction tank. Experimental results were comparable in magnitude of change to the field observations. The corrosion mechanism and kinetics have been discussed to evaluate corrosion behavior of the cement.
Experimental studies on corrosion of cement in CO2 injection wells under supercritical conditions
The corrosion performance of cement exposed to supercritical CO2 environments has been investigated under static and dynamic conditions by SEM, EDS, XRD and physical analysis. The dissimilarity of attack was compared in two exposure conditions i.e. gaseous CO2 and liquid CO2 by measuring compressive strength, permeability and penetration depth. Experimental comparisons showed that cement samples exposed to liquid supercritical CO2 under dynamic conditions exhibited greater reactivity as compared to gaseous supercritical CO2 and displayed distinct changes in the microstructures and distribution of the corrosion products within the cement.The corrosion degree becomes more severe with increasing temperature and exposure time in both phase states of CO2. The temperature and curing time have great effects on degree of corrosion. Cement samples cured in liquid phase reaction tank showed the greatest decrease of compressive strength and increase of permeability and penetration depth as compared to that of cured in gaseous phase reaction tank. Experimental results were comparable in magnitude of change to the field observations. The corrosion mechanism and kinetics have been discussed to evaluate corrosion behavior of the cement.
Experimental studies on corrosion of cement in CO2 injection wells under supercritical conditions
Experimentelle Untersuchungen der Zementkorrosion im CO2-Einlassschacht unter überkritischen Bedingungen
Lin, Yuanhua (Autor:in) / Zhu, Dajiang (Autor:in) / Zeng, Dezhi (Autor:in) / Yang, Yuanguang (Autor:in) / Shi, Taihe (Autor:in) / Deng, Kuanhai (Autor:in) / Ren, Chengqiang (Autor:in) / Zhang, Deping (Autor:in) / Feng, Wang (Autor:in)
Corrosion Science ; 74 ; 13-21
2013
9 Seiten, 15 Bilder, 31 Quellen
Aufsatz (Zeitschrift)
Englisch
Beton , CCS (Carbon Capture and Storage) , Kohlendioxidentfernung , Ladeschacht , überkritischer Zustand , überkritisches Fluid , überkritisches Kohlendioxid , Korrosionsbeständigkeit , Druckfestigkeit , Gasdurchlässigkeit , Erhärten (Zementabbinden) , energiedispersive Röntgenspektrometrie , Röntgenbeugung , Korrosionstiefe , Korrosionsprodukt , Korrosionsmechanismus , Auslaugung
Experimental studies on corrosion of cement in CO"2 injection wells under supercritical conditions
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