Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, East China University of Science and Technology, Shanghai 200237, PR China; Shanghai Engineering Research Center of Coal Gasification, East China University of Science and Technology, Shanghai 200237, PR China.
Department of Environmental Science and Technology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8503, Japan.
Bioresour Technol. 2017 Mar;227:345-352. doi: 10.1016/j.biortech.2016.12.068. Epub 2016 Dec 23.
Physicochemical evolution (i.e. pore structure variation, carbon structure change and active AAEM transformation) during rice straw (RS) and Shenfu bituminous coal (SF) co-pyrolysis was quantitatively determined in this work. Moreover, the corresponding char gasification was conducted using a thermogravimetric analyzer (TGA) and relative reactivity was proposed to quantify the co-pyrolysis impact on co-gasification reactivity. The results showed that the development of pore structure in co-pyrolyzed chars was first inhibited and then enhanced with the decrease of SF proportion. The promotion effect of co-pyrolysis on order degree of co-pyrolyzed chars gradually weakened with increasing RS proportion. Co-pyrolysis mainly enhanced active K transformation in co-pyrolyzed chars and the promotion effect was alleviated with increasing RS proportion. The inhibition effect of co-pyrolysis on co-gasification reactivity weakened with increasing RS proportion and gasification temperature, which was mainly attributed to the combination of carbon structure evolution and active AAEM transformation in co-pyrolysis.
在这项工作中，定量研究了水稻秸秆（RS）和神府烟煤（SF）共热解过程中的物理化学演变（即孔隙结构变化、碳结构变化和活性 AAEM 转化）。此外，还使用热重分析仪（TGA）进行了相应的焦气化实验，并提出了相对反应性来量化共热解对共气化反应性的影响。结果表明，共热解焦孔隙结构的发展先是受到抑制，然后随着 SF 比例的降低而增强。随着 RS 比例的增加，共热解对共热解焦有序度的促进作用逐渐减弱。共热解主要促进了共热解焦中活性 K 的转化，随着 RS 比例的增加，促进作用减弱。随着 RS 比例和气化温度的增加，共热解对共气化反应性的抑制作用减弱，这主要归因于共热解过程中碳结构演变和活性 AAEM 转化的结合。
