| 引用本文: | 刘辉,闫永宏,方航,韩冰,曹庆喜,吴少华.酸洗对龙口油页岩化学结构的影响分析[J].哈尔滨工业大学学报,2018,50(1):68.DOI:10.11918/j.issn.0367-6234.201607104 |
| LIU Hui,YAN Yonghong,FANG Hang,HAN Bing,CAO Qingxi,WU Shaohua.Analysis of effects of demineralization on Longkou oil shale chemical structure[J].Journal of Harbin Institute of Technology,2018,50(1):68.DOI:10.11918/j.issn.0367-6234.201607104 |
|
| 摘要: |
| 为研究脱灰对龙口油页岩的影响，采用HCl→HF→HNO3三级酸洗法脱灰，用XRD以及FT-IR法分别分析酸洗前后矿物质和化学结构的变化.结果表明：油页岩含氧官能团主要包含醚氧、羧基、羟基和羰基4类，酸洗制得的有机质纯度较高，酸洗后油页岩灰分的质量分数低于1%.酸洗对油页岩的化学结构产生影响，酸洗过程发生了水解反应，油页岩烷基醚、芳基醚含量减少；酸洗破坏了含氧官能团与无机盐之间的离子交联作用，将有机盐转化为有机酸，羧酸和酚羟基含量显著上升；羟基结构在酸洗前后都以环羟基、OH—O和OH—OH这3种形式为主，酸洗对环羟基、OH—O影响较大，对OH—OH影响很小；脂肪族在酸洗后部分CH伸缩振动和不对称的CH3伸缩振动转变成不对称的CH2伸缩振动，脂肪链长度增加.
|
| 关键词: 油页岩 酸洗 FT-IR XRD 脂肪结构 含氧官能团 |
| DOI：10.11918/j.issn.0367-6234.201607104 |
| 分类号:TQ536.9 |
| 文献标识码:A |
| 基金项目:国家自然科学基金(51476045); 国家科技支撑计划(2014BAA02B01) |
|
| Analysis of effects of demineralization on Longkou oil shale chemical structure |
|
LIU Hui,YAN Yonghong,FANG Hang,HAN Bing,CAO Qingxi,WU Shaohua
|
|
(School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China )
|
| Abstract: |
| To investigate the effect of demineralization on Longkou oil shale, the oil shale was acid demineralised in three steps with HCl→HF→HNO3, XRD and FT-IR was respectively used to analysis the compounds of minerals the change of chemical structure information before and after acid-treatment. The results show that oil shale mainly contains four oxygen-containing function groups, ether oxygen, carboxyl, hydroxyl and carbonyl, organic matter made by acid-treatment is really pure, the ash weight percentage is less than 1% after acid-treatment. acid-treatment has effect on the chemical structure in oil shale, hydrolysis reaction is occurred during the acid-treatment, alkyl ether and aromatic ether in the oil shale is decreased after acid-treatment; Carboxylic acid and phenolic hydroxyl are obviously increased, this is because acid-treatment breaks the ion exchange interaction between oxygen-containing groups and inorganic salts, then organic salts convert into organic acid; Hydroxyl structure both mainly contains structures of ring hydroxyl, OH-O and OH-OH before and after the acid-treatment, The acid-treatment has obvious effect on ring hydroxyl, OH-O, and has little effect on OH-OH; To the aliphatic structure, Acid-treatment makes the CH stretching vibration and CH3 asymmetric stretching vibration convert to CH2 asymmetric stretching vibration, the aliphatic chain is becoming longer.
|
| Key words: oil shale acid-treatment FT-IR XRD aliphatic structure oxygen-containing function group |
