Method for preparing ethylene through oxidative coupling reaction of methane
A technology of oxidative coupling reaction and methane, applied in chemical instruments and methods, catalysts, organic chemistry, etc., can solve the problems of high energy consumption and high reaction temperature, optimize reaction conditions, increase hydrocarbon yield, and reduce reaction temperature and the effect of the energy consumption required for the reaction
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Embodiment 1
[0067]In this example:
[0068] Catalyst I: 0.2 g of lanthanum oxide catalyst;
[0069] Catalyst II: 0.6 g Na 2 WO 4 -Mn / SiO 2 catalyst;
[0070] Reaction material I: methane flow rate is 10ml / min, oxygen flow rate is 30ml / min;
[0071] Reaction material II: methane flow rate is 60ml / min, oxygen flow rate is 20ml / min;
[0072] The specific process is:
[0073] According to the flow direction of the reaction materials, the catalyst I and the catalyst II are successively packed in the reaction zone A and the reaction zone B in the fixed-bed reactor;
[0074] Feed the reaction material I, heat the reaction material I to 452°C, first pass the catalyst I, start the methane oxidative coupling reaction, as the reaction progresses, the temperature rises to 750°C, and then react through the catalyst II; pass the reaction material I After 0.5min, start to pass into reaction material II, and reaction material II can carry out heat transfer with the material in described reaction z...
Embodiment 2
[0077] In this example:
[0078] Catalyst I: 0.2 g of strontium oxide-barium oxide / lanthanum oxide;
[0079] Catalyst II: 0.2 g Na 2 WO 4 -Mn / BaTiO 3 ;
[0080] Reaction material I: methane flow rate is 33ml / min, oxygen flow rate is 165ml / min;
[0081] Reaction material II: methane flow rate is 115ml / min, oxygen flow rate is 2.3ml / min;
[0082] The specific process is:
[0083] According to the flow direction of the reaction materials, the catalyst I and the catalyst II are successively packed in the reaction zone A and the reaction zone B in the fixed-bed reactor;
[0084] Heat the reaction material I to 505°C, first contact the catalyst I, the reaction starts, the temperature rises to 780°C, and continue the reaction through the catalyst II; after 1 minute of passing the reaction material I, pass the reaction material II, the reaction material II can Conduct heat transfer with the material in the reaction zone A without directly flowing through the reaction zone A, us...
Embodiment 3
[0087] In this example:
[0088] Catalyst I: 0.2 g of strontium oxide-barium oxide / lanthanum oxide;
[0089] Catalyst II: 0.5 g Na 2 WO 4 -Mn / Al 2 o 3 ;
[0090] Reaction material I: methane flow rate is 20ml / min, oxygen flow rate is 180ml / min;
[0091] Reaction material II: methane flow rate is 250ml / min, oxygen flow rate is 2.5ml / min;
[0092] The specific process is:
[0093] According to the flow direction of the reaction materials, the catalyst I and the catalyst II are successively packed in the reaction zone A and the reaction zone B in the fixed-bed reactor;
[0094] Heat the reaction material I to 468°C, first contact the catalyst I, the reaction begins, the temperature rises to 760°C, and continue the reaction through the catalyst II; after 2 minutes of passing the reaction material I, pass the reaction material II, the reaction material II can Conduct heat transfer with the material in the reaction zone A without directly flowing through the reaction zone A,...
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