Rapid co-pyrolysis of rice straw and a bituminous coal in a high-frequency furnace and gasification of the residual char.
Rapid pyrolysis of rice straw (RS) and Shenfu bituminous coal (SB) separately, and rapid co-pyrolysis of RS/SB blends (mass ratio 1:4, 1:4, and 4:1), were carried out in a high-frequency furnace which can ensure both high heating rate and satisfying contact of fuel particles. Synergies between RS and SB during rapid co-pyrolysis were investigated. Intrinsic and morphological structures of residual char from co-pyrolysis, and their effects on gasification characteristics were also studied. Synergies occurred during rapid co-pyrolysis of RS and SB (RS/SB=1:4) resulting in decreasing char yields and increasing volatile yields. Synergies also happened during gasification of the char derived from co-pyrolysis of RS and SB with mass ratio of 1:4. The increased mass ratio of RS to SB did not only weaken synergies during co-pyrolysis, but significantly reduced the gasification rates of the co-pyrolysis char compared to the calculated values. Results can help to optimize co-conversion process of biomass/coal.
Key Laboratory of Coal Gasification of Ministry of Education, East China University of Science and Technology, Shanghai 200237, China.
Shuai
S
Yuan
Zheng-hua
ZH
Dai
Zhi-jie
ZJ
Zhou
Xue-li
XL
Chen
Guang-suo
GS
Yu
Fu-chen
FC
Wang
D001709:Biotechnology / Q000295:instrumentation* / Q000379:methods*; D002606:Charcoal / Q000737:chemistry*; D003031:Coal / Q000032:analysis*; D004602:Elements; D005740:Gases / Q000737:chemistry*; D006358:Hot Temperature; D012275:Oryza / Q000737:chemistry*; D013997:Time Factors; D014866:Waste Products / Q000032:analysis
D003031:Coal; D004602:Elements; D005740:Gases; D014866:Waste Products; C540010:biochar; D002606:Charcoal