| 预处理条件对天然丝光沸石结构影响的研究 |
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| 引用本文： | 褚睿智,孟献梁,朱佳媚,宗志敏,魏贤勇.预处理条件对天然丝光沸石结构影响的研究[J].现代化工,2009,29(Z1). |
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| 作者姓名： | 褚睿智 孟献梁 朱佳媚 宗志敏 魏贤勇 |
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| 作者单位： | 1. 中国矿业大学化工学院,江苏,徐州,221008;煤炭加工与高效洁净利用教育部重点实验室,江苏,徐州,221008
2. 中国矿业大学化工学院,江苏,徐州,221008 |
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| 基金项目： | 国家自燃科学基金，煤炭加工与高效洁净利用教育部重点实验室开放基金，中国矿业大学青年科研基金 |
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| 摘 要： | 以提高天然丝光沸石纯度和改善孔道结构作为目标,考察了酸处理液浓度及焙烧温度等预处理条件对天然丝光沸石结构的影响.结果表明酸处理可以有效去除沸石中的金属杂质,调变沸石比表面积,提高硅铝比进而增强表面酸中心强度;焙烧可除去沸石内一些与矿物结合牢固且难与酸反应的孔道中的杂质,疏通孔道,但对沸石晶型结构影响较大,温度过高晶型被破坏;优化的预处理条件为处理液盐酸浓度1 mol/L、焙烧温度400℃.
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| 关 键 词： | 天然丝光沸石 预处理 晶型 比表面积 |
Effect of pretreatment on natural mordenite structure |
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| CHU Rui-zhi,MENG Xiang-liang,ZU Jia-mei,ZONG Zhi-min,WEI Xian-yong.Effect of pretreatment on natural mordenite structure[J].Modern Chemical Industry,2009,29(Z1). |
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| Authors: | CHU Rui-zhi MENG Xiang-liang ZU Jia-mei ZONG Zhi-min WEI Xian-yong |
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| Abstract: | The effects of pretreahnent conditions,including hydrochloric acid concentration and roasting temperature on structure of natural mordenite are examined to enhance purity and improve pore structure of NM.The results show that acid treatment can effectively remove metal impurity in pores of mordenite,modify the specific surface areal and increase acidity in active center on mordenite surface by improving the silica alumina ratio(Si/Al);roasting can remove the impurities from pores of natural mordenite which firmly adhere to mordenite and cannot be mnoved by hydrochloric acid.The crystal structure is affected by roasting temperature and will be destroyed when roasting temperature is too high.The optimal pretreatment conditions are 1 mol/L of hydrochloric acid and 400℃ as roasting temperature. |
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| Keywords: | nature mordenite pretreatment crystall structure specific surface area |
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