Ash fusion characteristics during co-gasification of biomass and petroleum coke.

Published on Feb 10, 2018in Bioresource Technology9.642
· DOI :10.1016/J.BIORTECH.2018.02.037
Qing'an Xiong3
Estimated H-index: 3
(CAS: Chinese Academy of Sciences),
Jiazhou Li9
Estimated H-index: 9
(CAS: Chinese Academy of Sciences)
+ 3 AuthorsYitian Fang28
Estimated H-index: 28
(CAS: Chinese Academy of Sciences)
Sources
Abstract
Abstract In this study, the effect of biomass ash on petroleum coke ash fusibility was investigated at a reducing atmosphere. Some analytical methods, such as ash fusion temperatures (AFTs) analysis, X-ray diffraction (XRD), FactSage and scanning electron microscopy (SEM), were applied to determine the characteristics of ash fusion and transformation of mineral matters. The results indicated that AFTs were closely associated with ash mineral compositions. It was found that the formations of high melting point calcium silicate, vanadium trioxide and coulsonite resulted in the high AFTs of Yanqing petroleum coke (YQ). When blending with certain proportional pine sawdust (PS), corn stalk (CS), the AFTs of mixture could be decreased significantly. For PS addition, the formations of low-melting point calcium vanadium oxide should be responsible for the reduction of AFTs, whereas for CS addition the reason was ascribed to the formation of low-melting point leucite and the disappearance of high-melting V2O3.
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Abstract Petroleum coke (petcoke), especially high vanadium (V) petcoke, has been produced increasingly because of the growing consumption of petroleum oil. Petcoke ash fusibility is closely related to ash slagging, which has an important impact on the clean and efficient utilization of petcoke. This study investigates a high V petcoke ash fusibility and its modification by coal blending and flux addition at reducing atmosphere. X-ray diffraction (XRD) and scanning electronic microscopy (SEM) we...
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Ash fusibility is closely related to ash slagging, which has significant impact on the clean and efficient utilization of petroleum coke (petcoke). Some mineral elements in petcoke, especially vanadium (V), are considered to be responsible for ash-related slagging during thermal conversion of petcoke. This study investigates the effect of vanadium pentoxide (V2O5) on synthetic petcoke ash fusibility from different perspectives, including V2O5 content variation, temperature rising, and atmosphere...
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