Study on reactivity characteristics and synergy behaviours of rice straw and bituminous coal co-gasification.
Co-gasification of rice straw (RS) and Shenfu bituminous coal (SF) was conducted in a thermogravimetric analyzer (TGA) to explore the effects of gasification temperature and blend ratio on reactivity characteristics and synergy behaviours of co-gasification. Moreover, the relationship between the synergy and the K/Ca transformation in co-gasification was studied using flame atomic absorption spectrum (FAAS) and in-situ heating stage microscope. The results showed that the whole reactivities increased with increasing RS proportion and gasification temperature. The transformation of water-soluble and ion-exchanged (ws-ie) calcium was enhanced in whole co-gasification and the ws-ie potassium transformation was obviously inhibited in mid-late reaction. Hence, synergy behaviours were synthetically determined by the enhancement of Ca deactivation and the strengthening of K catalysis. The inhibiting effect was occurred in initial co-gasification and was converted to the synergistic effect at a characteristic conversion, which decreased with increasing RS proportion and decreasing gasification temperature.
Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, Shanghai Engineering Research Center of Coal Gasification, East China University of Science and Technology, Shanghai 200237, PR China.
Juntao
J
Wei
Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, Shanghai Engineering Research Center of Coal Gasification, East China University of Science and Technology, Shanghai 200237, PR China.
Qinghua
Q
Guo
Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, Shanghai Engineering Research Center of Coal Gasification, East China University of Science and Technology, Shanghai 200237, PR China.
Handing
H
Chen
Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, Shanghai Engineering Research Center of Coal Gasification, East China University of Science and Technology, Shanghai 200237, PR China.
Xueli
X
Chen
Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, Shanghai Engineering Research Center of Coal Gasification, East China University of Science and Technology, Shanghai 200237, PR China. Electronic address: gsyu@ecust.edu.cn.
Guangsuo
G
Yu
D001709:Biotechnology / Q000379:methods*; D002244:Carbon / Q000032:analysis; D002606:Charcoal / Q000737:chemistry; D003031:Coal / Q000032:analysis*; D005740:Gases / Q000737:chemistry*; D007477:Ions; D012275:Oryza / Q000737:chemistry*; D012995:Solubility; D013696:Temperature; D014866:Waste Products
D003031:Coal; D005740:Gases; D007477:Ions; D014866:Waste Products; C540010:biochar; D002606:Charcoal; D002244:Carbon
Co-gasification; Inhibiting effect; Reactivity characteristics; Synergistic effect