本文關鍵詞： 煤氣化細渣 二氧化硅 高比表面積 SBA-15 Me-SBA-15　出處：《內蒙古大學》2015年碩士論文　論文類型：學位論文

【摘要】：本論文探究了如何利用煤氣化細渣中的高殘?zhí)剂亢械娜紵裏醽砀倪M固相反應活化殘渣實現(xiàn)低溫、低能耗的活化工藝,并用于提取鋁硅等有效成分。提出一種簡單易控的工藝來降低能耗并考察了相關因素；以煤氣化細渣為原料制備了高比表面二氧化硅,并對制得的樣品進行了一系列的表征；以煤氣化細渣為原料制備了SBA-15以及摻有活性離子的Fe-Al-Ti-SBA-15。煤氣化細渣中氧化鋁主要存在于莫來石晶格,經Na2CO3(或CaCO3)在通氧狀態(tài)下焙燒活化,用鹽酸溶出熟料中的鋁后,測定其鋁提取率。最佳焙燒條件為：原料配比(細渣/Na2CO3) 1.9:1,在惰性氣氛中升溫至350℃,在通氧狀態(tài)下反應10min,氧化鋁提取率89%；原料配比(細渣/CaCO3) 2:1,在惰性氣氛中升溫至700℃,在通氧狀態(tài)下反應15min,氧化鋁提取率89%；以煤氣化細渣作為硅源,CTAB和Trion-X-100作為混合模板劑制備了高比表面二氧化硅。利用SEM、TEM、比表面測試、紅外光譜以及X射線粉末衍射對所制得的樣品進行了一系列表征。樣品的比表面積為1248～1573m2/g,平均孔尺寸2nnm,二氧化硅純度高達99.6%。以煤氣化細渣作為硅源,P123作為模板劑,在低pH(0.45)值條件下制備了高度有序的六方介孔材料SBA-15。利用調節(jié)pH值的方法將煤氣化細渣中的Fe、Al、Ti引入到SBA-15中。當pH值調到1.5時,通過27Al固體核磁分析確定鋁以四配位的形式摻入到介孔材料的骨架中,Fe、Ti通過紫外可見漫反射分析確定也以四配位的形式摻入骨架中。隨著pH值的增大,鋁不僅以四配位摻入到骨架中,還有一部分以六配位形式摻入,鐵不僅形成骨架內鐵物種還形成了骨架外的不同鐵物種。
[Abstract]:This paper explores how to improve the activation process of low temperature and low energy consumption by using the combustion heat contained in the high carbon residue of coal gasification fine slag to improve the activation process of the residue activated by solid state reaction. A simple and easy to control process was proposed to reduce energy consumption and relevant factors were investigated. High specific surface silica was prepared from fine slag of coal gasification and a series of characterization of the samples were carried out. SBA-15 and Fe-Al-Ti-SBA-15 doped with active ions were prepared from fine coal gasification slag. Alumina in fine coal gasification slag mainly existed in mullite lattice, which was calcined and activated by Na _ 2CO _ 3 (or CaCO _ 3) in open oxygen state, and then dissolved out of aluminum in clinker by hydrochloric acid. The optimum roasting conditions are as follows: raw material ratio (fine slag / Na _ 2CO _ 3) 1.9: 1, heating up to 350 鈩，

本文編號：1524157