Nickel-based composite catalyst for methane reforming with carbon dioxide to produce synthesis gas under pressurization
A composite catalyst and carbon dioxide technology, applied in metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, hydrogen/synthesis gas production, etc., can solve the problem that the reforming methane reaction cannot continue and is difficult to achieve commercialization Application, rapid catalyst deactivation and other problems, to achieve the effect of inhibiting carbon deposition, increasing dispersion and surface active metal content, and improving catalytic activity and stability
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[0021] Example 1
[0022] According to CeO 2 -La 2 O 3 CeO in composite oxide 2 with La 2 O 3 The mass ratio of 0.986g (0.17mmol) P123 with a number average molecular weight of 5800 and 2.5471g (5.867mmol) cerium nitrate hexahydrate, 1.7894g (4.132mmol) lanthanum nitrate hexahydrate were added to 20mL of absolute ethanol , stirred at room temperature for 5 hours to completely dissolve the solid, and the resulting mixture was transferred to a petri dish, covered with a perforated PE film, and then transferred to a forced air oven at 40 °C for solvent evaporation for 48 hours, followed by evaporation at 100 °C for 24 hours. Finally, the obtained xerogel was heated to 450 °C at a heating rate of 1 °C / min under the air atmosphere flowing in the tube furnace, calcined at a constant temperature for 4 hours, cooled to room temperature naturally, and ground into powder to obtain the desired CeO2 -La 2 O 3 complex oxide.
[0023] According to the catalyst composition, it is 10%...
Example Embodiment
[0024] Example 2
[0025] According to CeO 2 -Sm 2 O 3 CeO in composite oxide 2 with Sm 2 O 3 The mass ratio of 0.986g (0.17mmol) P123 with a number average molecular weight of 5800 and 2.4946g (5.746mmol) cerium nitrate hexahydrate, 1.8907g (4.254mmol) samarium nitrate hexahydrate were added to 20mL of absolute ethanol , stirred at room temperature for 5 hours to completely dissolve the solid, and the resulting mixture was transferred to a petri dish, covered with a perforated PE film, and then transferred to a forced air oven at 40 °C for solvent evaporation for 48 hours, followed by evaporation at 100 °C for 24 hours. Finally, the obtained xerogel was heated to 450 °C at a heating rate of 1 °C / min under the air atmosphere flowing in the tube furnace, calcined at a constant temperature for 4 hours, cooled to room temperature naturally, and ground into powder to obtain CeO 2 -Sm 2 O 3 complex oxide.
[0026] According to the catalyst composition, it is 10%Ni-4%CeO 2...
Example Embodiment
[0027] Example 3
[0028] According to CeO 2 -Pr 6 O 11 CeO in composite oxide 2 with Pr 6 O 11 The mass ratio of 0.986g (0.17mmol) P123 with a number average molecular weight of 5800 and 2.8836g (6.642mmol) cerium nitrate hexahydrate, 1.4606g (3.3576mmol) praseodymium nitrate hexahydrate were added to 20mL of absolute ethanol , stirred at room temperature for 5 hours to completely dissolve the solid, and the resulting mixture was transferred to a petri dish, covered with a perforated PE film, and then transferred to a forced air oven at 40 °C for solvent evaporation for 48 hours, followed by evaporation at 100 °C for 24 hours. Finally, the obtained xerogel was heated to 450 °C at a heating rate of 1 °C / min under the air atmosphere flowing in the tube furnace, calcined at a constant temperature for 4 hours, cooled to room temperature naturally, and ground into powder to obtain CeO 2 -Pr 6 O 11 complex oxide.
[0029] According to the catalyst composition, it is 10%Ni-...
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