CAJ | 학술논문

在半连续超临界水反应器( SCWR)中考察了不同温度、反应时间下昭通褐煤的转化特性,结合半焦有机官能团及碳微晶结构分析,推测在超临界水中半焦孔隙的形成过程以及煤中矿物质的作用。结果表明,超临界水首先快速萃取出褐煤热解产物,促进了半焦石墨化,形成良好的炭素前驱体,此过程对半焦孔结构基本无作用；当温度高于550℃,炭素前驱体发生气化反应,产生了较多的C-O-C交联结构,比表面积明显提高,逐渐形成多孔炭材料；脱灰后的煤在升温过程中具有更高的萃取率,形成有利于微孔产生的炭素前驱体,煤中的矿物质更有利于中孔的形成。
재반련속초림계수반응기( SCWR)중고찰료불동온도、반응시간하소통갈매적전화특성,결합반초유궤관능단급탄미정결구분석,추측재초림계수중반초공극적형성과정이급매중광물질적작용。결과표명,초림계수수선쾌속췌취출갈매열해산물,촉진료반초석묵화,형성량호적탄소전구체,차과정대반초공결구기본무작용；당온도고우550℃,탄소전구체발생기화반응,산생료교다적C-O-C교련결구,비표면적명현제고,축점형성다공탄재료；탈회후적매재승온과정중구유경고적췌취솔,형성유리우미공산생적탄소전구체,매중적광물질경유리우중공적형성。
The influences of temperature, time, and mineral matter on conversion of lignite in a semi-continuous supercritical water reactor ( SCWR ) were investigated. The evolution of pore during reaction in SCWR was deduced with Fourier transform infrared and Raman spectra characterization. It is found that supercritical water can quickly extract the volatile from coal under low temperature, which promotes char graphitization and formation of carbon precursor. When temperature is above 550 ℃, more C-O-C cross-linking structures are formed, accompanied by a significant increase of surface area. The extraction yield of deashed coal is relatively high during pyrolysis process and more micropores are formed compared with raw coal. Furthermore, mineral matter in coal promotes the formation of mesopore.