caa a22 4500 469126361 CHVBK 20180323133151.0 cr unu---uuuuu 170328e19920701xx s 000 0 eng 10.1007/BF02705133 doi (NATIONALLICENCE)springer-10.1007/BF02705133 Properties of the NI/kieselguhr catalysts prepared by precipitation method [Elektronische Daten] [Chan Song, Tae Park, Sang Moon] The pore structure of the 40 wt% Ni/kieselguhr catalyst prepared by precipitation of nickel component from a 0.17 M nickel nitrate solution at 90°C changes when the precipitant, 1 M Na2CO3 solution, is added to the nickel nitrate solution over different periods. After precipitation for 22 hours, the catalyst experiences narrowing of the pore mouth which leads to appearance of new small pores. However, when the catalyst is prepared by precipitation for 2 hours, the small pores present in the kieselguhr support are blocked by the precipitate particles and only the large pores are remained in the catalyst. The catalyst containing relatively small pores exhibits low reaction rates and changes in the product selectivity in soybean-oil hydrogenation, due to the diffusional resistance of the reactants in the catalyst pores. The effect of the diffusional resistance is not observed with CO hydrogenation, benzene hydrogenation and n-hexane hydrogenolysis, where molecular sizes of the reactants are significantly smaller than the catalyst pores. Korean Institute of Chemical Engineering, 1992 Song Chan Department of Chemical Engineering, Seoul National University, Shinlim-dong San 56-1, Kwanak-ku, 151-742, Seoul, Korea aut Park Tae Department of Chemical Engineering, Seoul National University, Shinlim-dong San 56-1, Kwanak-ku, 151-742, Seoul, Korea aut Moon Sang Department of Chemical Engineering, Seoul National University, Shinlim-dong San 56-1, Kwanak-ku, 151-742, Seoul, Korea aut Korean Journal of Chemical Engineering Springer-Verlag 9/3(1992-07-01), 159-163 0256-1115 9:3<159 1992 9 11814 https://doi.org/10.1007/BF02705133 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02705133 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Song Chan Department of Chemical Engineering, Seoul National University, Shinlim-dong San 56-1, Kwanak-ku, 151-742, Seoul, Korea aut NATIONALLICENCE 700 1- Park Tae Department of Chemical Engineering, Seoul National University, Shinlim-dong San 56-1, Kwanak-ku, 151-742, Seoul, Korea aut NATIONALLICENCE 700 1- Moon Sang Department of Chemical Engineering, Seoul National University, Shinlim-dong San 56-1, Kwanak-ku, 151-742, Seoul, Korea aut NATIONALLICENCE 773 0- Korean Journal of Chemical Engineering Springer-Verlag 9/3(1992-07-01), 159-163 0256-1115 9:3<159 1992 9 11814 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer