• Journal of the Korea Academia-Industrial cooperation Society
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• v.9 no.1
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• pp.160-164
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• 2008

In this paper, The $TiO_2$ paste was prepared by changing the ratio of $TiO_2$(Degussa, P-25), binder (A-9540) and solvent. The paste was coated on to aluminuim metal plate to investigate the photodegradation of IPA. The best efficiency was obtained with increasing $TiO_2$ content and decreasing binder content. MEK is preferred to ethanol in terms of efficiency and the lower amount of solvent enhanced the rate. We, however, found the increasing viscosity of the paste and cracking with the lower content of solvent(MEK). In conclusion, the optimum activity was obtained when the ratio of $TiO_2$, Organic binder(A-9540) and MEK was 1.75 : 0.25 : 10.

• Korean Chemical Engineering Research
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• v.59 no.2
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• pp.281-295
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• 2021

In this study, the direct amination of ethanol was performed over impregnated Ni on SiO2-Al2O3 mixed oxide catalysts prepared by varying Si/(Si + Al) molar ratio to 30 mol%. To characterize the physico-chemical properties of the catalysts used, X-ray diffraction (XRD), N2-physisorption, temperature-programmed desorption of iso-propyl alcohol (IPA-TPD), temperature-programmed desorption of ethanol (EtOH-TPD), temperature-programmed reduction with H2 (H2-TPR), H2-chemisorption and transmission electron microscopy (TEM) were used. The acidic property was continuously increased until Si/(Si + Al) = 30 mol% in SiO2-Al2O3 mixed oxides used. The dispersion of Ni metal and surface area, acid characteristics of the supported Ni catalyst have a complex effect on the catalytic reaction activity. The low reduction temperature of nickel oxide and acidic properties were beneficial to the formation of acetonitrile. In terms of conversion of ethanol, Ni/SiO2-Al2O3 catalyst with a molar ratio of 10 mol% Si/(Si+Al) showed the highest activity and a volcanic curve based on it. The tendency of results were consistent in the metal dispersion and catalytic activity.