刘秋平,赵雨,王家炜,艾宁

• 1:浙江工业大学化学工程学院
• 2:浙江省生物燃料利用技术研究重点实验室
• 3:石油和化工行业生物柴油技术工程实验室
• 4:阿斯顿大学化学工程与应用化学系

摘要(Abstract)：

通过超声辅助表面活性剂法,以N-氨乙基-γ-氨丙基三甲氧基硅烷为改性剂,制备了氨基改性层状双氢氧化物(MgAl LDHs)。结合XRD、SEM、TG、EA和XPS等表征手段,探讨了制备过程中不同超声强度对氨基改性LDHs表面形貌等结构的影响,进一步分析了此氨基改性LDHs材料的CO_2吸附动力学过程。结果表明,超声辅助处理明显改善了氨基改性LDHs的表面形貌,有效提高了氨基改性LDHs的CO_2吸附容量;在30℃,0.1 MPa纯CO_2环境下,经195 W超声辅助材料的CO_2吸附容量达1.65 mmol×g~(-1),比未经超声处理的氨基改性LDHs的CO_2吸附容量提高了50%,适度超声辅助处理能有效增强LDHs化学吸附性能。根据双指数动力学模型分析,氨基改性LDHs的CO_2吸附受物理吸附和化学吸附两种机理控制,随着超声强度的提高,氨基改性LDHs化学吸附先得到增强,随后是物理吸附,当超声强度过大时,化学吸附受到抑制。

关键词(KeyWords)： 层状双氢氧化物;氨基改性;超声辅助;CO_2;吸附

Abstract:

Keywords:

基金项目(Foundation): 浙江省自然科学基金(LY16B060014);; 化学工程联合国家重点实验室开放课题(SKL-ChE-11A02)

作者(Author): 刘秋平,赵雨,王家炜,艾宁

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