Difunctional coupling catalyst for hydrocracking of waste plastics and preparation method of difunctional coupling catalyst
A hydrocracking and catalyst technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, preparation of liquid hydrocarbon mixtures, etc., can solve the problem of high metal loading, high catalyst cost, and liquid product Problems such as low yield
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[0039] On the other hand, a method for preparing a catalyst for hydrocracking of waste plastics comprises the following steps:
[0040] (1) Add the zirconium source to the ammonium metatungstate solution to obtain mixture I;
[0041] (2) The mixture I is dried and calcined to obtain the carrier WO 3 -ZrO 2 ;
[0042] (3) The carrier WO of step (2) 3 -ZrO 2 Immersed in a metal salt solution to obtain mixture II;
[0043] (4) The mixture II is dried and roasted to obtain MO x / WO 3 -ZrO 2 precursor;
[0044] (5) The above MO x / WO 3 -ZrO 2 Precursor reduction to give M / WO 3 -ZrO 2 catalyst.
[0045] M represents the supported metal, including one or a mixture of two or more of Pd, Rh, Ir, Ni, Fe, Co, and Cu. MO x Indicates the most stable metal oxide supported metal elements.
[0046] In some embodiments, the mixture I is dried at a temperature of 90-100°C.
[0047] In some embodiments, in step (2), the calcination temperature is 550-800°C.
[0048] In some em...
Embodiment 1
[0072] Prepare a 0.245g / ml ammonium metatungstate solution with ammonium metatungstate and deionized water, weigh 1g of uniformly ground zirconium hydroxide powder and impregnate it in 0.65ml ammonium metatungstate solution for 30min, the impregnated catalyst is passed through Drying overnight at 90°C and calcining at 923K for 3 hours to obtain the superacid carrier WO 3 -ZrO 2 ; Prepare the nickel nitrate solution of 0.479g / ml with nickel nitrate hydrate and deionized water, weigh 1g of evenly ground superacid carrier WO 3 -ZrO 2 The powder was impregnated in 0.65ml of nickel nitrate solution and left to stand for 30min, and the impregnated catalyst was dried overnight at 90°C and calcined at 773K for 3h to obtain nickel oxide-supported WO 3 -ZrO 2 Precursor; the calcined catalyst was passed through 10% H at 500°C 2 / 90%Ar reduction for 3h to obtain (10wt%)Ni / (15wt%)WO 3 -ZrO 2 -650.
Embodiment 2
[0074] Prepare a 0.245g / ml ammonium metatungstate solution with ammonium metatungstate and deionized water, weigh 1g of uniformly ground zirconium hydroxide powder and impregnate it in 0.65ml ammonium metatungstate solution for 30min, the impregnated catalyst is passed through Drying overnight at 90°C and calcining at 1073K for 3 hours to obtain the superacid carrier WO 3 -ZrO 2 ; Prepare the nickel nitrate solution of 0.479g / ml with nickel nitrate hydrate and deionized water, weigh 1g of evenly ground superacid carrier WO 3 -ZrO 2 The powder was impregnated in 0.65ml of nickel nitrate solution and left to stand for 30min, and the impregnated catalyst was dried overnight at 90°C and calcined at 773K for 3h to obtain nickel oxide-supported WO 3 -ZrO 2 Precursor; the calcined catalyst was passed through 10% H at 500°C 2 / 90%Ar reduction for 3h to obtain (10wt%)Ni / (15wt%)WO 3 -ZrO 2 -800.
[0075] Carry out NH to the catalyst before and after the catalyst supporting metal ...
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