High-selectivity biolipid hydrogenation decarboxylation catalyst as well as preparation method and application thereof
A high-selectivity technology for oil hydrogenation, applied in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem that the selectivity of decarboxylation needs to be improved, so as to reduce hydrogen consumption and increase specific Surface, the effect of improving dispersion
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Embodiment 1
[0031] Put 20g of silicon carbide in a tube furnace and treat it with a mixed gas of hydrogen fluoride and argon at 500°C for 10 minutes, wherein the volume fraction of hydrogen fluoride in the mixed gas is 0.1%; The surface-modified silicon carbide was treated in a nitric acid solution with a mass fraction of 50% for 2 hours, the surface was washed to neutral with distilled water, and dried at 100°C for 24 hours. Dissolve chloroplatinic acid in a solution of water and ethanol, then immerse the dried surface-modified silicon carbide carrier in the solution of chloroplatinic acid at 20°C for 12h, dry at 120°C for 12h; finally bake at 200°C After 24 hours, a highly selective oil hydrodecarboxylation catalyst 1 was obtained, and the mass fraction of the active component Pt in the catalyst 1 prepared in this example was 0.5% of the catalyst.
[0032] Put the catalyst A reduced with hydrogen into a high-temperature and high-pressure reactor, and then add cottonseed oil. The mass ra...
Embodiment 2
[0034] Put 20g of silicon carbide in a tube furnace and treat it with a mixed gas of chlorine and nitrogen for 10 minutes at 700°C, wherein the volume fraction of chlorine in the mixed gas is 0.5%; then roast it at 400°C for 10h, and The final surface-modified silicon carbide was treated with 50% nitric acid solution for 2 hours, its surface was washed to neutral with distilled water, and dried at 200°C for 5 hours; palladium chloride was dissolved in a solution of water and ethanol, and then dried The surface-modified silicon carbide carrier was immersed in a solution of palladium chloride at 30°C for 10h, dried at 200°C for 8h, and the dried sample was calcined at 300°C for 8h to obtain a highly selective oil hydrogenation decarboxylation catalyst 2. Example The mass fraction of the noble metal Pd in the prepared catalyst 2 is 0.8% of the catalyst.
[0035] The reaction evaluation method of Catalyst 2 is the same as that of Catalyst 1. Reaction conditions: reaction temper...
Embodiment 3
[0037] Put 20g of silicon carbide in a tube furnace and treat it with a mixed gas of hydrogen chloride and neon at 800°C for 20 minutes, wherein the volume fraction of hydrogen chloride in the mixed gas is 5%; then bake it at 700°C for 24h, and The calcined silicon carbide was treated in a nitric acid solution with a mass fraction of 50% for 2 hours, its surface was washed to neutral with distilled water, and dried at 150°C for 12 hours; the ruthenium nitrate was dissolved in a solution of water and ethanol, and the dried The silicon carbide was immersed in a solution of ruthenium nitrate at 35°C for 8h, dried at 150°C for 12h, and finally calcined at 700°C for 2h to obtain a highly selective oil hydrogenation decarboxylation catalyst 3. In the catalyst 3 prepared in this example, Ru The mass fraction of the catalyst is 1%.
[0038] The reaction evaluation method of Catalyst 3 is the same as that of Catalyst 1. Reaction conditions: reaction temperature 380°C; hydrogen pressur...
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