低階煤熱溶劑萃取殘?jiān)苽浣榭滋康难芯?/H1>
發(fā)布時(shí)間：2018-05-08 12:04
本文選題：介孔炭 + 萃取殘?jiān)?/strong>��； 參考：《華中科技大學(xué)》2015年碩士論文
【摘要】：溶劑萃取法是一種有效的低階煤提質(zhì)技術(shù)。然而通常人們過(guò)多的關(guān)注萃取產(chǎn)物而忽略了萃取之后高含碳量的殘?jiān)?有必要對(duì)溶劑萃取殘?jiān)M(jìn)行一定的資源化利用。本文利用1-甲基萘作為溶劑,分別對(duì)兩種低階煤進(jìn)行溶劑萃取,將萃取之后的殘?jiān)謩e利用CO2物理活化和KOH化學(xué)活化法制備介孔炭,并研究了將所制備的介孔炭分別應(yīng)用于催化生物質(zhì)熱解過(guò)程中焦油的脫除以及作為吸附劑吸附汞蒸氣的效率。本文利用1-甲基萘在350℃時(shí)分別對(duì)霍林河煤和神府煤兩種低階煤進(jìn)行萃取提質(zhì),發(fā)現(xiàn)萃取殘?jiān)暮俊⒑趿坑兴档?熱值及氣化特性有所提升。利用CO2物理活化萃取殘?jiān)苽浣榭滋?發(fā)現(xiàn)相同條件下殘?jiān)苽涞慕榭滋勘缺砻娣e、孔容要優(yōu)于原煤制備的介孔炭,且比表面積、孔容隨著活化時(shí)間的增加呈先上升后下降的趨勢(shì)。本文中相同溫度下,活化時(shí)間15分鐘為最優(yōu)。利用KOH化學(xué)活化法考察了不同原料、不同活化溫度、不同KOH/殘?jiān)|(zhì)量比對(duì)于制備介孔炭性質(zhì)的影響,發(fā)現(xiàn)活化溫度為800℃、KOH/萃取殘?jiān)|(zhì)量比為2:1時(shí)所制備的介孔炭介孔率最高,而溫度低于800℃時(shí)制備的樣品以微孔為主。這是由于碳材料在活化過(guò)程中首先出現(xiàn)微孔,隨著活化溫度的提升,微孔逐漸開(kāi)始合并出現(xiàn)介孔所導(dǎo)致的。利用所制備的介孔炭催化稻草熱解過(guò)程中焦油脫除,發(fā)現(xiàn)經(jīng)過(guò)催化后,熱解過(guò)程中CO2、CO、CH4三種氣體生成總量較無(wú)催化劑顯著增加,這是由于介孔炭吸附作用增加了揮發(fā)分的停留時(shí)間導(dǎo)致凝結(jié)為焦油的量減少,從而氣體生成量更多。利用制得的介孔炭進(jìn)行了常溫下和150℃時(shí)吸附汞蒸氣的實(shí)驗(yàn),發(fā)現(xiàn)常溫下各介孔炭吸附效率均在80%以上,而150℃由于脫吸附作用增強(qiáng)導(dǎo)致吸附效率下降,且常溫吸附效率較高的介孔炭其150℃時(shí)吸附效率也相對(duì)較高。
[Abstract]:Solvent extraction is an effective low rank coal extraction technique. However, people usually pay too much attention to the extraction products and ignore the residue with high carbon content after extraction, so it is necessary to make use of solvent extraction residue to some extent. In this paper, two kinds of low-rank coal were extracted by solvent extraction using 1-methylnaphthalene as solvent. After extraction, mesoporous carbon was prepared by CO2 physical activation and KOH chemical activation, respectively. The effect of mesoporous carbon on the removal of tar and adsorption of mercury vapor in the pyrolysis of biomass was studied. In this paper, two kinds of low-rank coal, Huolinhe coal and Shenfu coal, were extracted at 350 鈩，
本文編號(hào)：1861326
本文鏈接：http://sikaile.net/kejilunwen/huagong/1861326.html
本文選題：介孔炭 + 萃取殘?jiān)?/strong>��； 參考：《華中科技大學(xué)》2015年碩士論文
【摘要】：溶劑萃取法是一種有效的低階煤提質(zhì)技術(shù)。然而通常人們過(guò)多的關(guān)注萃取產(chǎn)物而忽略了萃取之后高含碳量的殘?jiān)?有必要對(duì)溶劑萃取殘?jiān)M(jìn)行一定的資源化利用。本文利用1-甲基萘作為溶劑,分別對(duì)兩種低階煤進(jìn)行溶劑萃取,將萃取之后的殘?jiān)謩e利用CO2物理活化和KOH化學(xué)活化法制備介孔炭,并研究了將所制備的介孔炭分別應(yīng)用于催化生物質(zhì)熱解過(guò)程中焦油的脫除以及作為吸附劑吸附汞蒸氣的效率。本文利用1-甲基萘在350℃時(shí)分別對(duì)霍林河煤和神府煤兩種低階煤進(jìn)行萃取提質(zhì),發(fā)現(xiàn)萃取殘?jiān)暮俊⒑趿坑兴档?熱值及氣化特性有所提升。利用CO2物理活化萃取殘?jiān)苽浣榭滋?發(fā)現(xiàn)相同條件下殘?jiān)苽涞慕榭滋勘缺砻娣e、孔容要優(yōu)于原煤制備的介孔炭,且比表面積、孔容隨著活化時(shí)間的增加呈先上升后下降的趨勢(shì)。本文中相同溫度下,活化時(shí)間15分鐘為最優(yōu)。利用KOH化學(xué)活化法考察了不同原料、不同活化溫度、不同KOH/殘?jiān)|(zhì)量比對(duì)于制備介孔炭性質(zhì)的影響,發(fā)現(xiàn)活化溫度為800℃、KOH/萃取殘?jiān)|(zhì)量比為2:1時(shí)所制備的介孔炭介孔率最高,而溫度低于800℃時(shí)制備的樣品以微孔為主。這是由于碳材料在活化過(guò)程中首先出現(xiàn)微孔,隨著活化溫度的提升,微孔逐漸開(kāi)始合并出現(xiàn)介孔所導(dǎo)致的。利用所制備的介孔炭催化稻草熱解過(guò)程中焦油脫除,發(fā)現(xiàn)經(jīng)過(guò)催化后,熱解過(guò)程中CO2、CO、CH4三種氣體生成總量較無(wú)催化劑顯著增加,這是由于介孔炭吸附作用增加了揮發(fā)分的停留時(shí)間導(dǎo)致凝結(jié)為焦油的量減少,從而氣體生成量更多。利用制得的介孔炭進(jìn)行了常溫下和150℃時(shí)吸附汞蒸氣的實(shí)驗(yàn),發(fā)現(xiàn)常溫下各介孔炭吸附效率均在80%以上,而150℃由于脫吸附作用增強(qiáng)導(dǎo)致吸附效率下降,且常溫吸附效率較高的介孔炭其150℃時(shí)吸附效率也相對(duì)較高。
[Abstract]:Solvent extraction is an effective low rank coal extraction technique. However, people usually pay too much attention to the extraction products and ignore the residue with high carbon content after extraction, so it is necessary to make use of solvent extraction residue to some extent. In this paper, two kinds of low-rank coal were extracted by solvent extraction using 1-methylnaphthalene as solvent. After extraction, mesoporous carbon was prepared by CO2 physical activation and KOH chemical activation, respectively. The effect of mesoporous carbon on the removal of tar and adsorption of mercury vapor in the pyrolysis of biomass was studied. In this paper, two kinds of low-rank coal, Huolinhe coal and Shenfu coal, were extracted at 350 鈩，
本文編號(hào)：1861326
本文鏈接：http://sikaile.net/kejilunwen/huagong/1861326.html
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