Loaded type high-dispersion molybdenum sulfide catalysts and preparing method thereof
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A catalyst and high-dispersion technology, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of low dispersion of active components, increase the contact surface, save active components, The effect of simple equipment
Inactive Publication Date: 2016-11-16
TIANJIN UNIV
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[0007] In order to solve the problems existing in the prior art, the present invention provides a supported highly dispersed molybdenum sulfide catalyst and its preparation method, which overcomes the problem of low dispersion of the active components of the supported molybdenum sulfide catalyst in the prior art
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Embodiment 1
[0029] MoS 2 Preparation of / AC catalyst: Dissolve 0.92g of ammonium heptamolybdate tetrahydrate in 9mL of deionized water, add 4.5g of activated carbon after completely dissolving, impregnate at room temperature for 24h, dry in an oven at 120°C for 12h, and turn the catalyst precursor to Put it into a tube furnace, roast at 450°C for 3h under Ar atmosphere, cool to room temperature, and then perform temperature-programmed vulcanization. The specific vulcanization process is: heat up from room temperature at 5°C / min to 400°C, then keep it for 4h, and cool under Ar atmosphere to room temperature, H 2 S / H 2 The total flow rate is 60mL / min, H 2 S volume fraction of 10% yielded MoS with 10 wt% Mo loading 2 / AC Catalyst.
Embodiment 2
[0031] MoS 2 Preparation of / AC catalyst: The preparation process is similar to Example 1, the difference is that the loading of Mo is changed to 2wt%, and MoS with a loading of Mo of 2wt% is obtained 2 / AC Catalyst.
Embodiment 3
[0033] MoS 2 Preparation of / AC catalyst: The preparation process is similar to Example 1, the difference is that the loading of Mo is changed to 30wt%, and MoS with a loading of Mo of 30wt% is obtained 2 / AC Catalyst.
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Abstract
The invention discloses a preparing method of loaded type high-dispersion molybdenum sulfide catalysts. According to the catalysts, molybdenum sulfide serves as the main active ingredient, one or more of nickel, cobalt, iron, copper, platinum, ruthenium, rhodium, palladium, lanthanum, osmium, iridium and the like can be added as a second metal component, and the components are loaded on a carrier selected from active carbon (AC), carbon black (VB), carbon fibers (CF), graphene, carbon nanotubes (CT), a mesoporous carbon material, gamma-aluminum oxide (gamma-Al2O3), silicon oxide (SiO2), zirconium oxide (ZrO2), titanium oxide (TiO2), a silicon-aluminum molecular sieve and a phosphate-aluminum molecular sieve. A series of loaded type high-dispersion molybdenum sulfide catalysts are prepared with a high-temperature sulfuration method. The preparing method is simple in process, high in production efficiency, low in cost and especially suitable for preparing various loaded type transition metal sulfide catalysts, and the prepared catalysts are high in dispersion degree and have high catalytic hydrogenation activity.
Description
technical field [0001] The invention belongs to the technical field of industrial catalysis and bioenergy conversion, and relates to the preparation of a molybdenum sulfide catalyst, in particular to a loaded highly dispersed molybdenum sulfide catalyst and a preparation method thereof. Background technique [0002] In the 1930s, unsupported pure tungsten sulfide or pure molybdenum sulfide catalysts began to be used in the hydrofining process of coal hydroliquefaction products. In the 1950s, because platinum reforming provided by-product hydrogen for refineries, petroleum fraction hydroprocessing technology developed rapidly, and sulfide catalysts such as molybdenum-cobalt, molybdenum-nickel, and tungsten-nickel supported by γ-alumina appeared. Transition metal molybdenum sulfide catalysts have been used today due to their high activity and good anti-poisoning ability, and are widely used as catalysts for hydrofining in the petroleum industry. In recent years, they have also...
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