CAJ | 학술논문

使用加压热重分析仪、马弗炉和常压滴管炉装置对褐煤、次烟煤、烟煤进行制焦，应用压汞法、低温N2和常温CO2吸附法测定煤焦孔结构参数，并通过扫描电镜观察煤焦表面形貌，测定了煤焦的CHN元素含量，利用热重分析仪测定焦900℃下的CO2气化反应活性，研究了压力、升温速率、高温停留时间对孔结构和气化反应性的影响。研究表明，慢速升温下提高热解压力会降低孔表面积和气化反应性；提高升温速率，降低高温停留时间，则微孔表面积降低，中孔显著增加，大孔的分形维数降低，化学反应活性提高；煤焦反应活性主要与残余挥发分含量相关，其次受到大、中孔表面积影响，而与微孔无关。
사용가압열중분석의、마불로화상압적관로장치대갈매、차연매、연매진행제초，응용압홍법、저온N2화상온CO2흡부법측정매초공결구삼수，병통과소묘전경관찰매초표면형모，측정료매초적CHN원소함량，이용열중분석의측정초900℃하적CO2기화반응활성，연구료압력、승온속솔、고온정류시간대공결구화기화반응성적영향。연구표명，만속승온하제고열해압력회강저공표면적화기화반응성；제고승온속솔，강저고온정류시간，칙미공표면적강저，중공현저증가，대공적분형유수강저，화학반응활성제고；매초반응활성주요여잔여휘발분함량상관，기차수도대、중공표면적영향，이여미공무관。
Lignite, sub-bituminous and bituminous coals were pyrolyzed in pressurised thermogravimetric analyser (PTGA), muffle furnace (MF) and drop-tube furnace (DTF). The effects of pyrolysis conditions on the char properties were studied. Mercury porosimetry and N2, CO2 adsorption were used to obtain pore structures of chars. The CO2 gasification reactivity was determined by PTGA at 1 173K. Chars were also analyzed with scanning electron microscope and a CHN elemental analyzer. The results indicate that low pyrolysis pressure, high heating rate and short residence time under high temperature substantially increase the mesoporosity and CO2 gasification reactivity, but reduce both microporosity and the macropore fractal dimension. The reactivity of char is mainly influenced by the residual volatile matter content, the second is macroporosity and mesoporosity, and has no relation to microporosity.