A sulfur-tolerant methanation process for producing synthetic gas instead of natural gas
A sulfur-resistant methanation technology that replaces natural gas. It is applied in the petroleum industry, gas fuel, fuel, etc. It can solve the problems of sulfur intolerance, easy poisoning and deactivation, etc., and achieves good isothermal properties, convenient operation, stability and control, and shortens the process. The effect of the process
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Embodiment 1
[0038] Preparation of catalyst for sulfur-tolerant methanation of syngas in slurry bed:
[0039] 80-100 mesh, specific surface area 150m 2 / g γ-Al 2 o 3 Calcined at 400°C for 4h, at a temperature of 25°C and a stirring speed of 100r / min, the Mo(NO 3 ) 3 ·5H 2 O, Ni(NO 3 ) 2 ·6H 2 O, γ-Al 2 o 3 According to the mass percentage of Mo: Ni: Al 25%: 30%: 45% equal volume impregnation and stirring for 8 hours, after standing for 4 hours, evaporate to viscous at 60°C, then put it in an oven to dry at 80°C for 12 hours, and then grind to 80-100 mesh Place in a muffle furnace and bake at 450°C for 4 hours to obtain a precursor; the volume composition is 20%H 2 and 80%N 2 , in an atmosphere with a flow rate of 100mL / min, using a two-stage temperature program, first raising the temperature to 350 °C at 4 °C / min, and then raising the temperature to 500 °C at 2 °C / min for 6 hours to obtain Mo:Ni:Al mass percentage 25% : 30%: 45% Mo-Ni-Al slurry bed synthesis gas sulfur-tolerant...
Embodiment 2
[0046] Preparation of catalyst for sulfur-tolerant methanation of syngas in slurry bed:
[0047] 60-80 mesh, specific surface area 150m 2 / g γ-Al 2 o 3 Calcined at 450°C for 5h, at a temperature of 35°C and a stirring speed of 120r / min, the Mo(NO 3 ) 3 ·5H 2 O, NH 4 VO 3 , Ni(NO 3 ) 2 ·6H 2 O, γ-Al 2 o 3 According to the mass percentage of Mo:V:Ni:Al 25%: 10%: 30%: 35% equal volume impregnation and stirring for 8 hours, after standing for 4 hours, evaporate to viscous at 80°C, then dry in an oven at 110°C for 12 hours, and then grind To 60-80 mesh, place it in a muffle furnace and bake at 550 ° C for 6 hours to obtain a precursor; the volume composition is 25% H 2 and 75%N 2 , in an atmosphere with a flow rate of 80mL / min, using a two-stage temperature program, first raising the temperature to 350°C at 5°C / min, and then raising the temperature to 550°C at 3°C / min for 6 hours to obtain Mo:V:Ni:Al mass percentage 25%: 10%: 30%: 35% Mo-V-Ni-Al slurry bed synthesis g...
Embodiment 3
[0054] Preparation of catalyst for sulfur-tolerant methanation of syngas in slurry bed:
[0055] 160-200 mesh, specific surface area 280m 2 / g SiO 2 Calcined at 550°C for 7h, at a temperature of 30°C and a stirring speed of 180r / min, the Mo(NO 3 ) 3 ·5H 2 O, Co(NO 3 ) 2 ·6H 2 O, SiO 2 According to the mass percentage of Mo: Co: Si 30%: 25%: 45% equal volume impregnation and stirring for 18 hours, after standing for 10 hours, evaporate at 60°C to viscous, then put it in an oven to dry at 100°C for 24 hours, and then grind to 160-200 mesh Place in a muffle furnace and bake at 500°C for 8 hours to obtain a precursor; the volume composition is 15%H 2 and 85%N 2 , in an atmosphere with a flow rate of 120mL / min, a two-stage temperature program was adopted. First, the temperature was raised to 350°C at 5°C / min, and then the temperature was raised to 600°C at 2°C / min. %: 25%: 45% Mo-Co-Si slurry bed synthesis gas sulfur-tolerant methanation catalyst for standby.
[0056] (1...
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