Abstract：
:This study experimentally investigated the potassium fixation ability and ash fusion characteristics during the gasification of corn stalk coke blended with coal ash in CO2 atmosphere. The ash samples were analyzed by X-ray diffraction (XRD) and scanning electron microscopy (SEM). FactSage was also employed to calculate the components and quantities of solid and liquid phase. The results show that the ratio of potassium retained in the biomass ash decreases with the increase in the gasification temperature. In addition, the retention ratio increases with more coal ash added. The improvement of potassium retention ratio is due to the reaction of potassium with alumina/silica to form the solid/slag phase of the potassium aluminosilicates. On the other hand, the ash fusion temperatures of the blended ash are increased by adding the coal ash, compared with the biomass ash. The study confirms that coal ash is a potential additive for not only fixing potassium, but also increasing the ash fusion temperatures of easy-to-slagging biomass.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Zhang H,Li J,Yang X,Guo S,Zhan H,Zhang Y,Fang Ydoi
10.1016/j.biortech.2018.09.053subject
Has Abstractpub_date
2018-12-01 00:00:00pages
416-421eissn
0960-8524issn
1873-2976pii
S0960-8524(18)31306-3journal_volume
270pub_type
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