Method for producing synthesis gas for reduced iron by utilizing coke-oven gas
A technology for reducing iron and coke oven gas, which is applied in hydrogen/synthesis gas production, chemical instruments and methods, and gas emission reduction, and can solve problems such as difficulty in meeting the production gas-based reduced iron synthesis gas standard
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Embodiment 1
[0032] In this example, CO at different temperatures 2 The conversion of methanation is evaluated, among which, the feed gas and catalyst are as follows:
[0033] Simulated coke oven gas: CH 4 , CO 2 、H 2 The molar ratio is 1:1:1 (33.3%: 33.3%: 33.3%);
[0034] CO 2 The methanation catalyst is MC-06-203, the active component nickel content is 5%, K 2 The content of O is 0.5%, and the balance is carrier alumina; an isothermal bed reactor is used, specifically as figure 1 shown.
[0035] The reaction process is as follows:
[0036] At a pressure of 0.5MPa and a space velocity of 2000h -1 Under the condition of 2 O / CH 4 = 1.0, then the reaction temperature was controlled at 500°C, 600°C, 800°C and 850°C, respectively, and the conversion performance was evaluated. The conversion results are shown in Table 1, where the gas compositions are all mole percent.
[0037] Table 1
[0038] H 2
[0039] According to the data in Table 1, it can be seen that at temperat...
Embodiment 2
[0041] In this example, CO at different temperatures 2 The conversion of methanation is evaluated, among which, the feed gas and catalyst are as follows:
[0042] Raw gas (mole percent): CH 4 , about 20%, CO 2 , about 20%, H 2 , about 60%, H 2 S<10ppm;
[0043] CO 2 The methanation catalyst is AC12-412, the content of the active component nickel is 17%, and the balance is carrier alumina; an isothermal bed reactor is used, specifically as figure 1 shown.
[0044] The reaction process is as follows:
[0045] At a pressure of 0.5MPa and a space velocity of 2000h -1 Under the condition of 2 O / CH 4 = 1.5, then the reaction temperature was controlled at 500°C, 600°C, 700°C, 800°C, 850°C, and 900°C, respectively, and the conversion performance was evaluated. The conversion results are shown in Table 2, where the gas compositions are in mole percent.
[0046] Table 2
[0047] H 2
[0048] According to the data in Table 2, it can be seen that at lower temperature...
Embodiment 3
[0050] This embodiment provides a method for utilizing coke oven gas to produce synthesis gas for reducing iron. The catalyst and reaction conditions are as follows:
[0051] Raw material gas: H 2 , 57.9%, CH 4 , 10.1%, CO 2 , 10.2%, CO, about 21%.
[0052] CO 2 The methanation catalyst is MC-06-207, the content of the active component nickel is 8%, the content of CaO is 1%, and the balance is alumina; a variable temperature bed reactor is used, specifically as figure 2 shown.
[0053] The reaction process is as follows:
[0054] At a pressure of 0.3MPa and a space velocity of 1000h -1 Under the condition of , water is added to the feed gas, and the molar ratio is controlled as H 2 O / CH 4 =1, the inlet temperature of the variable temperature bed is controlled at 400-450°C, and the outlet temperature is controlled at 700°C. The conversion results are shown in Table 3, where the gas compositions are all mole percent.
[0055] table 3
[0056]
[0057] According to ...
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