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Studies on the performances of SO4 2-/ZrO2-Fe3O4-MxOy (M=Mg,Zn,Ti) magnetic solid acids
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نویسنده
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ren b. ,fan m.
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منبع
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journal of the chemical society of pakistan - 2012 - دوره : 34 - شماره : 3 - صفحه:599 -603
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چکیده
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A series of solid acid catalysts so 4 2-/zro 2-fe 3o 4 (scfz),so 4 2-/zro 2 -fe 3o 4-mgo (szm),so 4 2-/zro 2 -fe 3o 4-tio 2 (szt) and so 4 2-/zro 2 -fe 3o 4-zno (szz) are prepared in chemical co-precipitation method. the obtained solid acid catalysts are characterized in detail by x-ray diffraction,scanning electron microscope (sem),transmission electron microscopy (tem) and vibrating sample magnetometer (vsm). the results show that the addition of oxides delays the amorphous-tetragonal and tetragonal-to-monoclinic phase transformation of zriconia,and the order of the thermal stability of tetragonal zirconia is szt,szm,szz,scfz. the superacid exhibits high catalytic activity in methanol dehydration to diethyl ether.
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کلیدواژه
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Catalyst; Magnetic solid acid; Monoclinic phase zirconia; Tetragonal phase zirconia; Zirconia
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آدرس
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college of material science and chemical engineering,harbin engineering university,harbin 150001,china,college of chemical engineering,jilin vocational college of industry and technology,jilin, China, college of material science and chemical engineering,harbin engineering university,harbin 150001,china,college of chemical engineering,jilin vocational college of industry and technology,jilin, China
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Authors
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