本文選題：加氫熱解 + 煤焦��； 參考：《華東理工大學(xué)》2015年碩士論文

【摘要】：本文以利用加氫煤焦制取氫氣為目的,通過與非加氫煤焦對比,研究了加氫煤焦的氣化反應(yīng)特性和理化性質(zhì),主要內(nèi)容包括以下三個(gè)方面：首先,以小型固定床裝置加氫熱解產(chǎn)出的兩種煤焦——玉溪(YX)和準(zhǔn)東(ZD)煤焦為研究對象,采用熱重分析儀和固定床氣化裝置分別進(jìn)行了二氧化碳和水蒸氣氣化實(shí)驗(yàn)。結(jié)果表明,ZD煤焦的氣化反應(yīng)性好于YX煤焦；在相近的熱解轉(zhuǎn)化率下,加氫煤焦的氣化反應(yīng)性好于非加氫煤焦；加壓有利于提高煤焦的氣化反應(yīng)性,但隨著氫壓的升高,氣化反應(yīng)性變差；延長熱解停留時(shí)間使煤焦的氣化反應(yīng)性降低。隨著煤焦水蒸氣氣化溫度的提高,氫氣和二氧化碳的濃度降低,一氧化碳的濃度增升高,1050℃時(shí)反應(yīng)基本達(dá)到了熱力學(xué)平衡狀態(tài)。其次,對中試氣流床裝置產(chǎn)出的兩種加氫煤焦——府谷(FG)和印尼(YN)煤焦進(jìn)行了水蒸氣氣化實(shí)驗(yàn),并利用XRF、SEM、BET、TG和XRD等分析方法考察了加氫煤焦和非加氫煤焦的理化性質(zhì)。結(jié)果表明,YN煤焦的氣化反應(yīng)性好于FG煤焦；相比非加氫煤焦,加氫煤焦的堿金屬含量高,孔隙結(jié)構(gòu)發(fā)達(dá),活性點(diǎn)多,但是比表面積小,石墨化程度高,總體上加氫煤焦的氣化反應(yīng)性好于非加氫煤焦。最后,利用物料和能量平衡進(jìn)行了FG和YN煤焦水煤漿氣化過程的計(jì)算,得到了不同氧煤比條件下氣化產(chǎn)生的有效氣成分和氣化效率。結(jié)果表明,隨著氧煤比提高,有效氣成分含量逐漸增大,而氣化效率逐漸降低。
[Abstract]:In this paper, the gasification reaction characteristics and physicochemical properties of hydrogenated char are studied by comparing with non-hydrogenated char to produce hydrogen. The main contents are as follows: firstly, Two kinds of char (Yuxi YX) and ZD (ZD) coke produced by hydropyrolysis in a small fixed bed unit were used as research objects. CO2 and steam gasification experiments were carried out by thermogravimetric analyzer and fixed bed gasification unit, respectively. The results show that the gasification reactivity of ZD char is better than that of YX char, the gasification reactivity of hydrogenated char is better than that of non-hydrogenated char under similar pyrolysis conversion, the gasification reactivity of char is improved by pressurization, but with the increase of hydrogen pressure, the gasification reactivity of char is better than that of YX char. The gasification reactivity became worse and the gasification reactivity of char decreased with the prolongation of pyrolysis residence time. With the increase of gasification temperature of coal char steam, the concentration of hydrogen and carbon dioxide decreases, and the concentration of carbon monoxide increases to 1050 鈩，

本文編號(hào)：1784917