The Cs0.1Cu0.2HXPVAs0.2Mo10Oy and Fe0.12HXPVAs0.3Mo11Oy catalysts were prepared by impregnation method and characterized by FT-IR and TPR.The propane oxidation on the catalysts were carried out in a continuous flow fi...The Cs0.1Cu0.2HXPVAs0.2Mo10Oy and Fe0.12HXPVAs0.3Mo11Oy catalysts were prepared by impregnation method and characterized by FT-IR and TPR.The propane oxidation on the catalysts were carried out in a continuous flow fixed-bed reactor.The result indicated that,under the conditions:V（N2）∶V（O2）∶V（C3H8）=2.2∶3.6∶1.2 θ=440℃,the catalysts performed in activity to a certain extent:over the catalyst of Cs0.1Cu0.2HXPVAs0.2Mo10Oy,the conversion for propane reach 72.92%,with a selectivity of 6.01% to acrylic acid and 2.91% to acetic acid;over Fe0.12HXPVAs0.3Mo11Oy catalyst,the conversion for propane was only 35.56%,but the selectivity for acrylic was as high as 12.15%,and acetic acid was 18.62%.The result showes that Cu could improve the conversion of propane,but could not inhibit the total oxidation product effectively,while Fe could enhance the selectivity for acrylic and acetic acid,but could not improve the conversion for propane.展开更多
通过正交实验设计,改变钼酸铵溶液的质量分数、pH值和催化剂焙烧温度,利用共沉淀法制备了一系列Mo Bi Co Fe Ce Cs K复合氧化物催化剂。借助于BET、TG DSC、XRD等分析方法对催化剂的物理化学性质进行了表征。在常压连续流动固定床反应器...通过正交实验设计,改变钼酸铵溶液的质量分数、pH值和催化剂焙烧温度,利用共沉淀法制备了一系列Mo Bi Co Fe Ce Cs K复合氧化物催化剂。借助于BET、TG DSC、XRD等分析方法对催化剂的物理化学性质进行了表征。在常压连续流动固定床反应器中,系统地考察了上述三种制备条件对复合氧化物催化剂催化异丁烯选择性氧化生成甲基丙烯醛反应性能的影响。结果表明,大比表面积的催化剂具有较高的活性,而平均孔径小的催化剂选择性较差。催化剂的最佳制备条件为:钼酸铵溶液的质量分数10%、pH值2～3、焙烧温度500℃。在异丁烯∶空气=6∶94(体积比)、GHSV=3600h-1和360℃条件下,异丁烯转化率87.2%,甲基丙烯醛选择性72.0%,甲基丙烯醛收率62.7%。展开更多
文摘The Cs0.1Cu0.2HXPVAs0.2Mo10Oy and Fe0.12HXPVAs0.3Mo11Oy catalysts were prepared by impregnation method and characterized by FT-IR and TPR.The propane oxidation on the catalysts were carried out in a continuous flow fixed-bed reactor.The result indicated that,under the conditions:V（N2）∶V（O2）∶V（C3H8）=2.2∶3.6∶1.2 θ=440℃,the catalysts performed in activity to a certain extent:over the catalyst of Cs0.1Cu0.2HXPVAs0.2Mo10Oy,the conversion for propane reach 72.92%,with a selectivity of 6.01% to acrylic acid and 2.91% to acetic acid;over Fe0.12HXPVAs0.3Mo11Oy catalyst,the conversion for propane was only 35.56%,but the selectivity for acrylic was as high as 12.15%,and acetic acid was 18.62%.The result showes that Cu could improve the conversion of propane,but could not inhibit the total oxidation product effectively,while Fe could enhance the selectivity for acrylic and acetic acid,but could not improve the conversion for propane.
文摘通过正交实验设计,改变钼酸铵溶液的质量分数、pH值和催化剂焙烧温度,利用共沉淀法制备了一系列Mo Bi Co Fe Ce Cs K复合氧化物催化剂。借助于BET、TG DSC、XRD等分析方法对催化剂的物理化学性质进行了表征。在常压连续流动固定床反应器中,系统地考察了上述三种制备条件对复合氧化物催化剂催化异丁烯选择性氧化生成甲基丙烯醛反应性能的影响。结果表明,大比表面积的催化剂具有较高的活性,而平均孔径小的催化剂选择性较差。催化剂的最佳制备条件为:钼酸铵溶液的质量分数10%、pH值2～3、焙烧温度500℃。在异丁烯∶空气=6∶94(体积比)、GHSV=3600h-1和360℃条件下,异丁烯转化率87.2%,甲基丙烯醛选择性72.0%,甲基丙烯醛收率62.7%。
