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Promoting effect of high-silica zeolites on a metal-containing alumina matrix (process of hydrodesulphurization of thiophene)
Abstract 1. Metal-containing (Me, Ni, Fe, Mo) boro- and ferrosilicate zeolites without a binder have high initial activities in hydrodesulphurization, similar to the activity of an industrial AlCoMo contact, but lower activities (by a factor of 2–3) in the stable process. 2. In catalysts consisting of γ-Al2O3 and group VI and VIII metal oxides, with low contents of active metals (Ni/Mo = 0·4−0·8) the addition of Ni and Na forms of boro- and ferrosilicates has a promoting effect, increasing stable values of activity by a factor of 2–3 and the apparent effective rate constant byb a factor of 4–7. 3. Introduction of sodium forms of boro- and ferrosilicates into an alumina matrix with a high content of active metals (Ni/Mo = 1·4−1·5) leads to inhibition hydrodesulphurization, reducing significantly (by a factor of 2·5−3) the stable values of activity and the apparent effective rate constant by comparison with the initial composition Al2O3 + NiO + MoO3. 4. The addition of 5–10% promoter (high-silica borosilicate zeolite) is optimum for modyfying the catalytic composition Al2O3 + NiO + MoO3.
Promoting effect of high-silica zeolites on a metal-containing alumina matrix (process of hydrodesulphurization of thiophene)
Abstract 1. Metal-containing (Me, Ni, Fe, Mo) boro- and ferrosilicate zeolites without a binder have high initial activities in hydrodesulphurization, similar to the activity of an industrial AlCoMo contact, but lower activities (by a factor of 2–3) in the stable process. 2. In catalysts consisting of γ-Al2O3 and group VI and VIII metal oxides, with low contents of active metals (Ni/Mo = 0·4−0·8) the addition of Ni and Na forms of boro- and ferrosilicates has a promoting effect, increasing stable values of activity by a factor of 2–3 and the apparent effective rate constant byb a factor of 4–7. 3. Introduction of sodium forms of boro- and ferrosilicates into an alumina matrix with a high content of active metals (Ni/Mo = 1·4−1·5) leads to inhibition hydrodesulphurization, reducing significantly (by a factor of 2·5−3) the stable values of activity and the apparent effective rate constant by comparison with the initial composition Al2O3 + NiO + MoO3. 4. The addition of 5–10% promoter (high-silica borosilicate zeolite) is optimum for modyfying the catalytic composition Al2O3 + NiO + MoO3.
Promoting effect of high-silica zeolites on a metal-containing alumina matrix (process of hydrodesulphurization of thiophene)
Vysotskii, A.V. (author) / Yaskina, V.A. (author) / Psavko, B.R. (author) / Kuimova, N.M. (author) / Kim Yen Khva (author) / Konoval'chikov, L.D. (author) / Polinina, Ye.V. (author) / Shmidt, F.K. (author)
1987-07-21
9 pages
Article (Journal)
Electronic Resource
English
A noble Process to Recover Metal Values from Spent Hydrodesulphurization Catalyst
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