油頁巖小分子溶劑溶出特性研究
發(fā)布時間：2018-09-12 07:44
【摘要】：以吉林樺甸油頁巖為研究對象，通過二氯甲烷、石油醚兩級萃取，對油頁巖原礦、兩級萃余物進行SEM拍照，對二氯甲烷萃取液、石油醚萃取液進行GC/MS檢測，研究樺甸油頁巖在兩級溶液的溶解行為以及各級萃余物表面物理形貌。結果表明：隨著萃取的加深，油頁巖顆粒相對光滑的片層結構逐漸消失，顆粒粒徑趨于細小，表面溝壑逐漸增多，后級萃取時液固接觸面積增加。二氯甲烷和石油醚對油頁巖中烷烴溶出能力較強。兩級萃取物組分主要由C15至C28飽和烷烴構成。溶劑萃取法可以有效地的提取油頁巖中一類或相似的化合物群，對研究油頁巖構成及提取高經(jīng)濟價值成分有重要意義。 以廣東茂名和遼寧撫順油頁巖為樣品，，對其進行鹽酸酸洗，利用兩種溶劑二氯甲烷和四氫呋喃對酸洗前后的油頁巖進行索氏萃取，并利用GC/MS對萃取液進行分析，得出兩種溶劑在酸洗前后萃取到的物質(zhì)種類。研究油頁巖在有機溶劑萃取條件下，小分子化合物的溶出規(guī)律。結果表明：酸洗更有利于油頁巖中的小分子溶出，可以提高萃取率。酸洗對于萃取物組分中的烷烴化合物組分影響較小而對含氧小分子化合物組分影響相對較大。對比同一樣品酸洗前后的萃取液，一些重復出現(xiàn)的物質(zhì)的相對含量或檢出物的個數(shù)發(fā)生了變化。二氯甲烷的溶出物主要是烷烴，四氫呋喃的溶出物主要是含氧小分子化合物。 利用二氯甲烷和四氫呋喃對酸洗前后的油頁巖進行索氏萃取，對萃取液進行GC/MS檢測，分析溶出物的組成。對萃取物進行孔隙結構測試，分析酸洗及萃取前后吸附量和孔徑結構的變化。通過溶劑作用溶出小分子化合物并改變油頁巖孔隙結構，進而得出可溶小分子的賦存方式。結果表明：二氯甲烷主要溶出物種類為烷烴，四氫呋喃主要溶出物種類為含氧小分子化合物。酸洗會使得孔隙結構更加豐富，有利于可溶小分子的溶出。油頁巖經(jīng)過溶劑萃取后會使得中（2-50nm）、大孔(50nm)數(shù)量增多。油頁巖孔隙結構中可以貯存可溶小分子，富集在油頁巖表面的可溶小分子在溶出時會產(chǎn)生孔洞�？扇苄》肿釉谌艹鲞^程中會使得油頁巖產(chǎn)生新孔或擴大孔尺寸。
[Abstract]:Taking Huadian oil shale in Jilin province as the research object, through two-stage extraction of dichloromethane and petroleum ether, the oil shale raw ore and two-stage extraction residues were photographed by SEM, and the dichloromethane extract and petroleum ether extract were detected by GC/MS. The dissolution behavior of Huadian oil shale in two-stage solution and the physical morphology of the surface of the residue were studied. The results showed that the relatively smooth lamellar structure of oil shale particles gradually disappeared with the deepening of extraction, the particle size tended to be small, the surface gully increased, and the liquid-solid contact area increased during the later stage extraction. Dichloromethane and petroleum ether have strong ability to dissolve alkanes from oil shale. The components of the two-stage extracts are mainly composed of C 15 to C 28 saturated alkanes. Solvent extraction method can effectively extract a class or similar compound groups from oil shale, which is of great significance to the study of oil shale composition and extraction of high economic value components. The oil shale of Maoming and Fushun of Liaoning Province was pickled with hydrochloric acid. The oil shale before and after pickling was extracted by Soxhlet extraction with dichloromethane and tetrahydrofuran, and the extraction solution was analyzed by GC/MS. The kinds of substances extracted from the two solvents before and after pickling were obtained. The dissolution law of small molecular compounds in oil shale was studied under the condition of organic solvent extraction. The results show that pickling is more favorable to the dissolution of small molecules in oil shale and can improve the extraction rate. The effect of pickling on the alkane components in the extracts was less than that on the oxygen-containing small molecular compounds. The relative content of some repeated substances or the number of the detected substances were changed compared with the extraction solution before and after pickling of the same sample. The dissolution of dichloromethane is mainly alkane, and that of tetrahydrofuran is mainly oxygen-containing small molecule compound. The oil shale before and after pickling was extracted with dichloromethane and tetrahydrofuran by Soxhlet extraction. The extraction solution was detected by GC/MS to analyze the composition of the dissolution. The pore structure of the extract was tested and the changes of adsorption capacity and pore structure before and after pickling and extraction were analyzed. Small molecular compounds were dissolved by solvent and the pore structure of oil shale was changed, and the occurrence mode of soluble small molecules was obtained. The results showed that the main dissolved compounds of dichloromethane and tetrahydrofuran were alkanes and small molecular compounds containing oxygen respectively. Pickling will enrich the pore structure and facilitate the dissolution of soluble small molecules. Oil shale will increase the number of 2-50nm and 50nm after solvent extraction. Soluble small molecules can be stored in the pore structure of oil shale. Soluble small molecules cause oil shale to produce new or enlarged pore sizes during dissolution.
【學位授予單位】：東北電力大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TE662.3
本文編號：2238361
[Abstract]:Taking Huadian oil shale in Jilin province as the research object, through two-stage extraction of dichloromethane and petroleum ether, the oil shale raw ore and two-stage extraction residues were photographed by SEM, and the dichloromethane extract and petroleum ether extract were detected by GC/MS. The dissolution behavior of Huadian oil shale in two-stage solution and the physical morphology of the surface of the residue were studied. The results showed that the relatively smooth lamellar structure of oil shale particles gradually disappeared with the deepening of extraction, the particle size tended to be small, the surface gully increased, and the liquid-solid contact area increased during the later stage extraction. Dichloromethane and petroleum ether have strong ability to dissolve alkanes from oil shale. The components of the two-stage extracts are mainly composed of C 15 to C 28 saturated alkanes. Solvent extraction method can effectively extract a class or similar compound groups from oil shale, which is of great significance to the study of oil shale composition and extraction of high economic value components. The oil shale of Maoming and Fushun of Liaoning Province was pickled with hydrochloric acid. The oil shale before and after pickling was extracted by Soxhlet extraction with dichloromethane and tetrahydrofuran, and the extraction solution was analyzed by GC/MS. The kinds of substances extracted from the two solvents before and after pickling were obtained. The dissolution law of small molecular compounds in oil shale was studied under the condition of organic solvent extraction. The results show that pickling is more favorable to the dissolution of small molecules in oil shale and can improve the extraction rate. The effect of pickling on the alkane components in the extracts was less than that on the oxygen-containing small molecular compounds. The relative content of some repeated substances or the number of the detected substances were changed compared with the extraction solution before and after pickling of the same sample. The dissolution of dichloromethane is mainly alkane, and that of tetrahydrofuran is mainly oxygen-containing small molecule compound. The oil shale before and after pickling was extracted with dichloromethane and tetrahydrofuran by Soxhlet extraction. The extraction solution was detected by GC/MS to analyze the composition of the dissolution. The pore structure of the extract was tested and the changes of adsorption capacity and pore structure before and after pickling and extraction were analyzed. Small molecular compounds were dissolved by solvent and the pore structure of oil shale was changed, and the occurrence mode of soluble small molecules was obtained. The results showed that the main dissolved compounds of dichloromethane and tetrahydrofuran were alkanes and small molecular compounds containing oxygen respectively. Pickling will enrich the pore structure and facilitate the dissolution of soluble small molecules. Oil shale will increase the number of 2-50nm and 50nm after solvent extraction. Soluble small molecules can be stored in the pore structure of oil shale. Soluble small molecules cause oil shale to produce new or enlarged pore sizes during dissolution.
【學位授予單位】：東北電力大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TE662.3
【參考文獻】
相關期刊論文 前10條
1 劉招君;董清水;葉松青;朱建偉;郭巍;李殿超;柳蓉;張海龍;杜江峰;;中國油頁巖資源現(xiàn)狀[J];吉林大學學報(地球科學版);2006年06期
2 崔景偉;鄒才能;朱如凱;白斌;吳松濤;王拓;;頁巖孔隙研究新進展[J];地球科學進展;2012年12期
3 周國江;;油頁巖溶劑萃取技術[J];黑龍江科技學院學報;2010年03期
4 周國江;關瑜;;油頁巖催化萃取工藝[J];黑龍江科技學院學報;2010年04期
5 周國江;周揚;張宏森;薛立梅;;依蘭油頁巖分級萃取物分析[J];黑龍江科技學院學報;2011年02期
6 ;An evidence for the strong association of N-methyl-2-pyrrolidinone with some organic species in three Chinese bituminous coals[J];Chinese Science Bulletin;2008年08期
7 吳鵬;周揚;李福林;周國江;;油頁巖溶劑萃取技術研究[J];礦產(chǎn)綜合利用;2010年06期
8 何余生,李忠,奚紅霞,郭建光,夏啟斌;氣固吸附等溫線的研究進展[J];離子交換與吸附;2004年04期
9 趙新法,楊黎燕,石振海;煤中低分子化合物及對煤炭轉(zhuǎn)化性能的影響[J];煤化工;2005年02期
10 陳德仁;秦志宏;陳娟;華宗琪;陳冬梅;;煤結構模型研究及展望[J];煤化工;2011年04期
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