Application of NiO/MgO solid solution catalyst in coke oven coal gas steam reforming hydrogen production method at low water carbon ratio
A technology of steam reforming and coke oven gas, which is applied in chemical instruments and methods, hydrogen, inorganic chemistry, etc., and can solve problems such as easy carbon deposition and catalyst pulverization
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[0024] The preparation method adopts co-precipitation and impregnation to prepare the catalyst. Among them, the co-precipitation preparation method is divided into conventional co-precipitation method and urea decomposition uniform co-precipitation method. The main preparation process and steps of the impregnation method are as follows:
[0025] (a) a certain amount of nickel salt is dissolved in deionized water at room temperature to prepare a solution of a certain concentration;
[0026] (b) immerse the magnesium oxide powder in the above mixed solution and stir at room temperature on a constant temperature magnetic stirrer for 12 hours, filter after standing for 12 hours, and then dry in an oven at 110°C;
[0027] (c) Put the dried catalyst into a muffle furnace, program the temperature rise to 800° C. for 5 hours at a heating rate of 5° C. per minute, and cool it to room temperature with the furnace after the heat preservation;
[0028] (d) Grind the calcined catalyst in...
Embodiment 1
[0037] Weigh 46.526g Ni(NO 3 ) 2 ·6H 2O was dissolved in 15ml of distilled water to form an aqueous solution of nickel nitrate. Then add 9.673g MgO to the nickel nitrate aqueous solution, stir well, mix well, stir fully on a constant temperature magnetic stirrer at room temperature for 12 hours, let it stand for 12 hours, filter, and then put the obtained solid in an oven at 110°C Bake for 3 hours. Then put it into a muffle furnace to program the temperature rise, and raise the temperature to 800° C. at a rate of 5° C. per minute for 5 hours, and then cool to room temperature with the furnace after the heat preservation. The calcined catalyst is then ground into powder and pressed into tablets with a pressure of 30KN. After the tablet is pressed, it is crushed and sieved to make catalyst particles of 20-40 mesh.
Embodiment 2
[0039] Weigh 46.526g Ni(NO 3 ) 2 ·6H 2 O, 61.538g Mg (NO 3 ) 2 ·6H 2 O was dissolved in 10ml of distilled water to form a mixed solution of nickel nitrate and magnesium nitrate. Stir well and evenly, after mixing, stir and evaporate to dryness on a constant temperature magnetic stirrer at 90°C-100°C, and then put it in an oven and bake at 110°C for 3 hours. Then put it into the muffle furnace to program the temperature rise, and raise the temperature to 800°C at a rate of 5°C per minute and keep it for 4 hours. room temperature. The calcined catalyst was ground into powder and pressed into tablets with a pressure of 30KN. After the tablet is pressed, it is put into the muffle furnace and the temperature is raised to 1200° C. at a rate of 5° C. per minute and kept for 10 hours. After cooling with the furnace, take out the diaphragm, crush and sieve to make catalyst particles of 20-40 mesh.
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