Pt-based multi-component catalyst for dehydrogenation of propane to propylene and preparation method thereof
A propane dehydrogenation and catalyst technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve the problem of poor dispersion, low selectivity, and stability of Pt catalysts problems such as poor properties, and achieve the effects of small Pt particles, high dispersion, and poor breakthrough stability.
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Embodiment 1
[0029] Weigh 5.00 g of γ-Al 2 o 3 powder, treated in a heating furnace at 150 °C for 12 h under a nitrogen atmosphere, and the dehydrated γ-Al obtained after heat treatment 2 o 3 As a carrier; weigh an appropriate amount of niobium oxalate (C 10 h 5 NbO 20 ) to prepare the oxalic acid solution of niobium oxalate, then add the above-mentioned carrier into the oxalic acid solution, soak at 30 °C for 8 h, dry at 120 °C for 2 h, and roast at 550 °C for 4 h; weigh an appropriate amount of SnCl 4 and (NH 4 ) 2 PtCl 4 Prepare an aqueous solution, place the calcined carrier in SnCl 4 -(NH 4 ) 2 PtCl 4In the aqueous solution, immerse at 30 °C for 10 h, then dry at 120 °C for 2 h, and calcined at 350 °C for 2 h; the obtained catalyst precursor was reduced at 570 °C for 2 h in a 10 vol % hydrogen atmosphere to obtain Pt-2Sn-Nb 5 % / γ-Al 2 o 3 Catalyst (wherein Nb 2 o 5 The content of Pt is 5.0 wt%, the content of Pt is 0.5 wt%, and the content of Sn is 1 wt%).
[0030] P...
Embodiment 2
[0032] Weigh 5.00 g of γ-Al 2 o 3 powder, treated in a heating furnace at 150 °C for 12 h under a nitrogen atmosphere, and the dehydrated γ-Al obtained after heat treatment 2 o 3 As a carrier; weigh an appropriate amount of tantalum ethoxide to prepare an ethanol solution of tantalum ethoxide, then add the above carrier into the ethanol solution, soak at 30°C for 8h, dry at 150°C for 2h, and roast at 550°C for 4h; weigh an appropriate amount of SnCl 4 and (NH 4 ) 2 PtCl 4 Prepare an aqueous solution, place the calcined carrier in SnCl 4 -(NH 4 ) 2 PtCl 4 In the aqueous solution, immerse at 30 °C for 10 h, then dry at 120 °C for 2 h, and calcined at 350 °C for 2 h; the obtained catalyst precursor was reduced at 570 °C for 2 h in a 10vol% hydrogen atmosphere to obtain Pt-2Sn-Ta 1% / γ-Al 2 o 3 Catalyst (where Ta 2 o 5 The content of Pt is 1.0 wt%, the content of Pt is 0.5 wt%, and the content of Sn is 1 wt%).
[0033] Pack 200 mg of the catalyst obtained in a fixed-...
Embodiment 3
[0035] Weigh 5.00 g of γ-Al 2 o 3 powder, treated in a heating furnace at 150 °C for 12 h under a nitrogen atmosphere, and the dehydrated γ-Al obtained after heat treatment 2 o 3 As a carrier; weigh an appropriate amount of titanium nitrate (Ti(NO 3 ) 4 ) to prepare an aqueous solution of titanium nitrate, then add the above carrier into the aqueous solution, soak at 30°C for 8h, dry at 150°C for 2h, and roast at 550°C for 4h; weigh an appropriate amount of SnCl 4 and (NH 4 ) 2 PtCl 4 Prepare an aqueous solution, place the calcined carrier in SnCl 4 -(NH 4 ) 2 PtCl 4 In aqueous solution, immerse at 30 °C for 10 h, then dry at 120 °C for 2 h, and calcined at 350 °C for 2 h; the obtained catalyst precursor was reduced at 570 °C for 2 h in a 10vol% hydrogen atmosphere to obtain Pt-2Sn-3Ti / γ-Al 2 o 3 Catalyst (the content of Ti is 1.5 wt%, the content of Pt is 0.5 wt%, and the content of Sn is 1 wt%).
[0036] Pack 200 mg of the obtained catalyst into a fixed-bed tubu...
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