A simultaneous removal of no from sintering flue gas x The carbon-based catalyst of and co and its preparation method and application
A technology of carbon-based catalysts and sintered flue gas, applied in the direction of physical/chemical process catalysts, metal/metal oxides/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problem of no practical application of integrated purification catalysts , to achieve the effect of potential process application value, low preparation cost and wide application prospect
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Embodiment 1
[0025] Example 1: A simultaneous removal of NO in sintering flue gas x and CO carbon-based catalyst, the carbon-based catalyst is based on FeO x and KO x The oxide is the active substance, the bituminous coal is dissolved in the Fe precursor solution, stirred and impregnated, after drying, the coal sample is impregnated in the K precursor solution, ultrasonically impregnated, dried and placed in a muffle furnace to heat the coal sample at high temperature; Then it is soaked in ultrasonic acid pickling, rinsed with distilled water until the pH value is neutral, and the carbon-based catalyst is obtained after drying.
[0026] Specific steps are as follows:
[0027] Step 1. Dissolve Shenmu bituminous coal in Fe(Cl) according to the ratio of Fe(wt.%)=3 3 solution, after stirring at room temperature for 12h, then filtered and dried to constant weight;
[0028] Step 2. Immerse the coal sample obtained in step (1) in a 1mol / L KOH solution, stir for 60 minutes, then continue ultra...
Embodiment 2
[0034] Example 2: A simultaneous removal of NO in sintering flue gas x And the carbon-based catalyst of CO, the specific preparation method is as follows:
[0035] Step 1, according to the ratio of Fe(wt.%)=2.5, the Shenmu bituminous coal is dissolved in ferric nitrate solution, stirred at room temperature for 11 hours, then filtered and dried to constant weight;
[0036] Step 2. Immerse the coal sample obtained in step (1) in 2mol / L KHCO 3 In the solution, after stirring for 80 minutes, continue ultrasonic impregnation for 50 minutes, then filter and dry to constant weight;
[0037] Step 3. Place the coal sample obtained in step (2) in a high-temperature-resistant iron-chromium alloy reactor, seal the reactor with a high-temperature-resistant gasket and a screw sealing cover, and then place the reactor in a muffle furnace In the process, the temperature was increased from room temperature to 800 °C at a heating rate of 13 °C / min, and the temperature was maintained for 2.5 h...
Embodiment 3
[0040] Example 3: A simultaneous removal of NO in sintering flue gas x And the carbon-based catalyst of CO, the specific preparation method is as follows:
[0041] Step 1, according to the ratio of Fe(wt.%)=5.5, dissolve Datong long-flame coal in iron carbonate solution, stir at room temperature for 10h, then filter and dry to constant weight;
[0042] Step 2. Immerse the coal sample obtained in step (1) in 3mol / L KCl solution, stir for 90 minutes, continue ultrasonic impregnation for 60 minutes, then filter and dry to constant weight;
[0043] Step 3. Place the coal sample obtained in step (2) in a high-temperature-resistant iron-chromium alloy reactor, seal the reactor with a high-temperature-resistant gasket and a screw sealing cover, and then place the reactor in a muffle furnace In the process, the temperature was increased from room temperature to 700 °C at a heating rate of 15 °C / min, and the temperature was maintained for 3 hours after the temperature was raised to 70...
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