二甲醚燃烧用掺杂钡、镍六铝酸盐催化剂的研究

二甲醚是易液化，便于运输，清洁化的新能源。当作为燃料使用时，采用催化燃烧的方法能使得燃烧的起燃温度降低和提高燃烧转化率，克服了普通燃烧的缺点，实现了清洁燃烧。对二甲醚催化燃烧用的催化剂BaNiAl11O19-δ进行了制备与研究。采用溶胶-凝胶法制备六铝酸盐催化剂BaNiAl11O19-δ,考察其对新能源二甲醚催化燃烧反应的活性，并用TG—DTA对催化剂的性质进行考察。结果表明，加入经800℃焙烧4h后又在1200℃焙烧了2h的催化剂，比未加催化剂的燃烧体系T10降低了50℃。用溶胶一凝胶法制备的六铝酸盐催化剂BaNiAl11O19-δ对二甲醚催化燃烧反应具有较高的催化活性。     

制备方法对BaNi0.2Mn0.8Al11O19－δ催化燃烧二甲醚的催化活性的影响

Catalytic combustion of dimethyl ether （DME） over hexaaluminate catalyst BaNi0.2Mn0.8Al11O19-δ has been investigated. The catalysts were prepared with the sol-gel method and reverse microemulsion method respectively and characterized by thermogravimetry-differential thermal analysis, X-ray diffraction and transimission electron microscope. It was found that the formation of Mn, Ni modified hexaaluminate was a relatively slow process via two solid state reactions and spinel structure was a transition phase. At the same calcined temperature and time, the catalyst prepared with the reverse microemulsion method could form the hexaaluminate phase more easily than that prepared with the sol-gel method. The catalyst BaNi0.2Mn0.8Al11O19-δ prepared with the reverse micro-emulsion method appeared a plate-like morphology, while it appeared a needle-like morphology when using the sol-gel method. The catalytic activities of catalysts BaNi0.2Mn0.8Al11O19-δ prepared with two different methods for DME combustion were tested. It showed that catalyst prepared with the reverse microemulsion method had better catalytic activity, i.e. T10% of DME had decreased by 45℃, about 90% conversion of diemthyl ether at 380℃.     

二甲醚催化燃烧研究的进展

介绍了近年来二甲醚作为一种清洁能源的研究状况，进行了二甲醚的催化燃烧研究的初探。通过对贵金属、金属氧化物和六铝酸盐等催化剂应用于二甲醚催化燃烧的比较，发现六铝酸盐最具研究应用前景。     

反相微乳法制备锆锰掺杂六铝酸盐催化剂的研究

利用三相图确定了稳定的OP-10乳化剂/正丁醇/环己烷/水反相微乳体系,并采用反相微乳法和超临界干燥技术制备了纳米锆锰掺杂六铝酸盐催化剂.X射线衍射(XRD)、透射电子显微镜(TEM)、比表面积(BET)和氢气程序升温还原(H2-TPR)对锆锰掺杂六铝酸盐进行表征.分析结果表明,催化剂制备的最佳焙烧条件为1 050℃,焙烧4 h,比表面积为78.185 m2/g,颗粒分散均匀,主要形状为片状,粒度在10 nm-30 nm.     

在化工教学中提高学生的综合能力

在化工教学中,利用课堂讨论的形式,培养和训练学生对专业信息总结归纳和综合表达的能力,有效地提高了学生的学习积极性和主动性;在毕业论文实践中,注重培养同学综合运用知识,解决实际问题的能力。实践证明对学生综合能力的培养有着较明显的作用。     

制备方法对BaNi0.2Mn0.8Al11O19-δ催化燃烧二甲醚的催化活性的影响

Catalytic combustion of dimethyl ether (DME) over hexaaluminate catalyst BaNi0.2Mn0.8Al11O19-δ has been investigated. The catalysts were prepared with the sol-gel method and reverse microemulsion method respectively and characterized by thermogravimetry-differential thermal analysis, X-ray diffraction and transimission electron microscope. It was found that the formation of Mn, Ni modified hexaaluminate was a relatively slow process via two solid state reactions and spinel structure was a transition phase. At the same calcined temperature and time, the catalyst prepared with the reverse microemulsion method could form the hexaaluminate phase more easily than that prepared with the sol-gel method. The catalyst BaNi0.2Mn0.8Al11O19-δ prepared with the reverse micro-emulsion method appeared a plate-like morphology, while it appeared a needle-like morphology when using the sol-gel method. The catalytic activities of catalysts BaNi0.2Mn0.8Al11O19-δ prepared with two different methods for DME combustion were tested. It showed that catalyst prepared with the reverse microemulsion method had better catalytic activity, i. e. T10% of DME had decreased by 45℃, about 90% conversion of diemthyl ether at 380℃.