發(fā)布時(shí)間：2018-08-20 15:16

【摘要】：本文以勝利褐煤為研究對(duì)象,對(duì)其進(jìn)行酸洗脫礦物質(zhì)處理,在不同溫度下對(duì)原煤及酸洗煤進(jìn)行熱處理,并對(duì)焦樣進(jìn)行FT-IR、XRD及Raman等基礎(chǔ)表征,采用固定床反應(yīng)器對(duì)其進(jìn)行CO_2氣化性能測(cè)試,結(jié)果表明:隨著熱處理溫度的升高,煤中所含的甲基、亞甲基、含氧官能團(tuán)及脂肪側(cè)鏈等大量被破壞,芳香層片的橫向直徑增大,堆垛高度增加,芳香環(huán)縮合程度增加,芳環(huán)空間排列趨于有序化,700°C時(shí)煤主體結(jié)構(gòu)由有機(jī)質(zhì)碳結(jié)構(gòu)開(kāi)始向碳微晶結(jié)構(gòu)轉(zhuǎn)變。煤結(jié)構(gòu)熱演變過(guò)程,由最初的復(fù)合脂肪類鏈?zhǔn)椒枷憔酆衔镏黧w結(jié)構(gòu),通過(guò)化學(xué)鍵的斷裂后,主體組分縮聚為稠環(huán)芳香聚合物,平均環(huán)數(shù)有所增加,隨著溫度的繼續(xù)升高,主體組分由有機(jī)質(zhì)碳結(jié)構(gòu)轉(zhuǎn)變?yōu)樘嘉⒕ЫY(jié)構(gòu)。礦物質(zhì)在煤焦結(jié)構(gòu)變化過(guò)程中起到重要的作用。鹽酸對(duì)鋁硅酸鹽的脫除效果并不明顯,只是通過(guò)H+不同程度的取代對(duì)具有一定催化作用的Ca~(2+)、Na+進(jìn)行有效脫除,使C-OM(M代表Ca~(2+)、Na+等礦物質(zhì))轉(zhuǎn)變成C-OH,從而改變官能團(tuán)結(jié)構(gòu)。礦物質(zhì)對(duì)煤焦CO_2氣化性能具有較大的影響。礦物質(zhì)的存在有效的抑制了有機(jī)質(zhì)碳向碳微晶結(jié)構(gòu)的轉(zhuǎn)變,使CO_2氣化反應(yīng)性增強(qiáng),當(dāng)煤樣以碳微晶結(jié)構(gòu)參與反應(yīng)時(shí),礦物質(zhì)的催化作用相對(duì)較弱。
[Abstract]:In this paper, Shengli lignite was treated by acid-washing. The raw coal and acid-washing coal were treated at different temperatures. The coke samples were characterized by FT-IR, XRD and Raman. The CO_2 gasification performance of the lignite was tested in a fixed bed reactor. The results showed that with the increase of heat treatment temperature, the content of the coal was increased. The transverse diameter of aromatic lamellae increases, stacking height increases, the degree of condensation of aromatic rings increases, and the spatial arrangement of aromatic rings tends to be ordered. At 700 degrees C, the main structure of coal begins to change from organic carbon structure to carbon microcrystalline structure. The main structure of aliphatic chain aromatic polymers is condensed into polycyclic aromatic polymers through the breaking of chemical bonds, and the average number of rings increases. As the temperature continues to rise, the main components change from organic carbon structure to carbon microcrystalline structure. The removal effect of aluminosilicate is not obvious, but the removal of Ca ~ (2 +), Na ~ + with certain catalytic effect is effected by H + substitution in different degree, so that C-OM (M stands for Ca ~ (2 +), Na + and other minerals) can be transformed into C-OH, thus changing the functional structure. Minerals have a great influence on the gasification performance of coal char CO_2. The conversion of organic carbon to carbon microcrystalline structure was inhibited, and the gasification reactivity of CO_2 was enhanced. The catalytic effect of minerals was relatively weak when the coal sample took part in the reaction with carbon microcrystalline structure.
【學(xué)位授予單位】：內(nèi)蒙古工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TD849.2

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 張紹強(qiáng);;中國(guó)煤炭清潔高效利用的實(shí)踐與展望[J];科技導(dǎo)報(bào);2016年17期

2 許修強(qiáng);王永剛;張書;陳宗定;陳緒軍;賀欣;;褐煤原位氣化半焦的反應(yīng)性及微觀結(jié)構(gòu)的演化行為[J];燃料化學(xué)學(xué)報(bào);2015年03期

3 王永剛;孫加亮;張書;;反應(yīng)氣氛對(duì)褐煤氣化反應(yīng)性及半焦結(jié)構(gòu)的影響[J];煤炭學(xué)報(bào);2014年08期

4 Manoj B;;Investigation of nanocrystalline structure in selected carbonaceous materials[J];International Journal of Minerals Metallurgy and Materials;2014年09期

5 齊學(xué)軍;郭欣;羅重奎;鄭楚光;;熱解過(guò)程中鐵對(duì)神府褐煤焦結(jié)構(gòu)的影響[J];工程熱物理學(xué)報(bào);2014年04期

6 韓峰;張衍國(guó);蒙愛(ài)紅;李清海;;水城褐煤熱解的氣體產(chǎn)物析出特征及甲烷的生成反應(yīng)類型研究[J];燃料化學(xué)學(xué)報(bào);2014年01期

7 鐘梅;馬鳳云;;不同氣氛下煤連續(xù)熱解產(chǎn)物的分配規(guī)律及產(chǎn)品品質(zhì)分析[J];燃料化學(xué)學(xué)報(bào);2013年12期

8 鄒祥波;王智化;胡昕;周志軍;黃鎮(zhèn)宇;周俊虎;岑可法;;提質(zhì)褐煤的快速熱裂解氣體產(chǎn)物的析出特性[J];燃燒科學(xué)與技術(shù);2013年03期

9 周晨亮;劉全生;李陽(yáng);智科端;滕英躍;宋銀敏;;勝利褐煤水蒸氣氣化制富氫合成氣及其固有礦物質(zhì)的催化作用[J];化工學(xué)報(bào);2013年06期

10 萬(wàn)斌;石金明;向軍;;典型煤種CO_2氣化過(guò)程中產(chǎn)物的析出特性[J];南昌大學(xué)學(xué)報(bào)(工科版);2012年04期

相關(guān)博士學(xué)位論文 前3條

1 石金明;典型煤種熱解氣化特性研究[D];華中科技大學(xué);2010年

2 李美芬;低煤級(jí)煤熱解模擬過(guò)程中主要?dú)鈶B(tài)產(chǎn)物的生成動(dòng)力學(xué)及其機(jī)理的實(shí)驗(yàn)研究[D];太原理工大學(xué);2009年

3 葉翠平;煤大分子化合物結(jié)構(gòu)測(cè)定及模型構(gòu)建[D];太原理工大學(xué);2008年

，

本文編號(hào)：2194098