反相微乳液法制备甲醇合成的铜基催化剂
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摘要
反相微乳液法是一种合成金属纳米颗粒的有效方法,以十六烷基三甲基溴化铵(CTAB)、正戊醇、环己烷、金属盐溶液构建反相微乳液体系,制备了一系列用于合成甲醇的纳米铜基催化剂,并分别对其结构、形貌和活性进行了表征。结果表明,催化剂制备过程中的老化温度、碱浓度、H2O/CTAB的摩尔比以及盐溶液的浓度对催化剂的粒径和活性均有一定的影响,为甲醇合成催化剂的新型制备方法提供了借鉴。
Reverse microemulsion method is an effective way to prepare metal nanoparticles.In this study,a reverse microemulsion system is set up by using hexadecyl trimethyl ammonium bromide(CTAB),n-pentyl alcohol,cyclohexane and metal salt solutions,and is then used to prepare a series of Cu based catalysts for methanol synthesis.Characterization of structure,morphology and catalytic activity of these catalysts are studied respectively.The results indicate that the aging temperature,alkali concentration and the molar ratio of H2 O/CTAB in preparation process have substantial influences on the particle sizes and activity of the catalysts,which provides a new preparation method of methanol synthesis catalysts.
Reverse microemulsion method is an effective way to prepare metal nanoparticles.In this study,a reverse microemulsion system is set up by using hexadecyl trimethyl ammonium bromide(CTAB),n-pentyl alcohol,cyclohexane and metal salt solutions,and is then used to prepare a series of Cu based catalysts for methanol synthesis.Characterization of structure,morphology and catalytic activity of these catalysts are studied respectively.The results indicate that the aging temperature,alkali concentration and the molar ratio of H2 O/CTAB in preparation process have substantial influences on the particle sizes and activity of the catalysts,which provides a new preparation method of methanol synthesis catalysts.
引文
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[15]何晓晓,石碧华,王柯敏,等.基于反相微乳液法的尺寸可控性二氧化硅纳米颗粒制备研究[J].湖南大学学报(自然科学版),2010,37:62-66.
[16]马维平,孙洪巍,苗芳,等.十六烷基三甲基溴化铵/正丁醇/环己烷/水微乳液制备纳米粉体的研究[J].硅酸盐通报,2008,27:645-653.
[2]宋华,汪淑影,李锋,等.微乳液法制备Pt/Al2O3催化剂及其催化氯代硝基苯选择加氢活性[J].化工进展,2011,30:771-776.
[3]胡荣,任志敏,陈超,等.超声微乳液法制备Ag/Ag Cl复合纳米颗粒及其光催化性能研究[J].材料导报B:研究篇,2012,26:27-29.
[4]勾华,张朝平,罗玉萍,等.微乳液和反相微乳液在合成和制备纳米铁系化合物上的应用[J].贵州大学学报(自然科学版),2001,18:143-145.
[5]Chen D,Wu S.Synthesis of Nickel nanoparticles in wter-in-oil microemulsions[J].Chem Mater,2000,12:1354-1360.
[6]Chiang S,Liaw B,Chen Y. Preparation of Ni B nanoparticles in water-in-oil microemulsions and their catalysis during hydrogenation of carbonyl and olefinic groups[J]. Appl Catal A:General,2007,319:144-152.
[7]肖文,钟世安,付邦.反相微乳液法制备纳米氧化镁颗粒及其反应机理研究[J].现代化工,2010,30:61-63.
[8]刘飞,祝博,王晓丹,等.微乳液法制备六边形薄片状γ-CuI晶体的研究[J].材料导报B:研究篇,2012,26:5-8.
[9]殷慧敏,李良清,李佳佳,等.基于反相微乳液法ZIF-8纳米晶体的制备及表征[J].现代化工,http://kns. cnki. net/kcms/detail/11.2172.TQ.20180725.1710.040.html.
[10]张明宇,王华,高文桂.真空冷冻干燥法制备CuO-ZnO-Zr O2甲醇合成催化剂[J].化工进展,2013,32(6):1290-1295.
[11]Chu Z,Chen H,Yu Y,et al.Surfactant-assisted preparation of Cu/ZnO/Al2O3catalyst for methanol synthesis from syngas[J].Journal of Molecular Catalysis A:Chemical,2013,366:48-53.
[12]Zander S,Kunkes E,Schuster M,et al.The role of the oxide component in the development of copper composite catalysts for methanol synthesis[J].Angewandte Chemie International Edition,2013,52:6536-6540.
[13]Zhang F,Zhang Y,Liu Y,et al. Synthesis of Cu/Zn/Al/Mg catalysts on methanol production by different precipitation methods[J].Molecular Catalyssi,2017,441:190-198.
[14]吴其晔,方鲲,崔陇兰,等.两步连续反相微乳液法原位合成铁钴镍/聚苯胺核-壳型纳米复合微粒[J].青岛科技大学学报,2003,24:37-41.
[15]何晓晓,石碧华,王柯敏,等.基于反相微乳液法的尺寸可控性二氧化硅纳米颗粒制备研究[J].湖南大学学报(自然科学版),2010,37:62-66.
[16]马维平,孙洪巍,苗芳,等.十六烷基三甲基溴化铵/正丁醇/环己烷/水微乳液制备纳米粉体的研究[J].硅酸盐通报,2008,27:645-653.
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