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Catalyst for coke oven gas double system synthesis gas and its preparation method and application

A technology for coke oven gas and catalyst, which is applied in the field of catalyst for double-integrated coke oven gas to syngas and its preparation field, can solve the problems of low carbon dioxide conversion rate and the like, and achieve high economic value, strong anti-carbon performance, and high catalytic activity Effect

Active Publication Date: 2022-01-04
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Jong Wook Bae et al first reported the Ni / Al 2 o 3 Catalyst coke oven gas carbon dioxide water vapor double reforming experiment, at 750°C, 0.1Mpa, CH 4 / CO 2 / CO / H 2 / H 2 Under the condition of O=1 / 0.38 / 0.29 / 2.09 / 1.2, that is, the total molar amount of water vapor and carbon dioxide M (H2O(g)+CO2) Molar mass of methane M CH4 The ratio is M (H2O(g)+CO2) : M CH4 =1.6:1, the methane conversion rate is 85%, but the carbon dioxide conversion rate is very low, only 20%

Method used

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  • Catalyst for coke oven gas double system synthesis gas and its preparation method and application
  • Catalyst for coke oven gas double system synthesis gas and its preparation method and application
  • Catalyst for coke oven gas double system synthesis gas and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0031] 0.25mol of Ni(NO 3 ) 2 ·6H 2O was dissolved in 100ml distilled water to form a nickel nitrate solution; 0.05mol of Sr(NO 3 ) 2 Dissolve in the nickel nitrate solution; then add 0.75mol of MgO in the mixed solution of nickel nitrate and strontium nitrate, fully stir evenly, then place it on a constant temperature magnetic stirrer at room temperature and fully stir for 12 hours, then let it stand for 12 hours, Then filter, put the obtained solid into a 110°C oven and dry for 3 hours, then take it out and put it into a muffle furnace for roasting, raise it to 800°C at a rate of 5°C per minute and keep it for 5 hours, then cool with the furnace to At room temperature, the catalyst was obtained. Grind the obtained catalyst into powder, and then use 1.5×10 8 The pressure of Pa presses it into a catalyst sheet. Put the catalyst sheet into the muffle furnace again, raise the temperature to 800°C at the same rate of 5°C per minute and keep it warm for 5 hours, cool down wi...

Embodiment 2

[0032] Embodiment 2 (one-step method)

[0033] Add 0.25mol of Ni(NO 3 ) 2 ·6H 2 O, 0.05mol of Sr(NO 3 ) 2 and 0.75mol of Mg(NO 3 ) 2 ·6H 2 O, stir until it dissolves evenly to form a mixed solution of nickel nitrate, strontium nitrate and magnesium nitrate. The mixed solution was fully stirred evenly, and slowly added (NH 4 ) 2 CO 3 solution, the dropwise addition was stopped immediately after a white precipitate appeared. It is then aged, filtered, washed, dried and made into Sr 0.05 Ni 0.25 / Mg 0.75 O catalyst. Then put it into a muffle furnace for roasting, raise the temperature to 800°C at a rate of 5°C per minute and keep it warm for 10 hours, and then cool to room temperature with the furnace. After taking it out, it is crushed and sieved to make catalyst particles of 60-80 mesh.

Embodiment 3

[0034] Embodiment 3 (co-precipitation method) sulfate

[0035] Add 0.25mol of Ni(NO 3 ) 2 ·6H 2 O, 0.05mol of Sr(NO 3 ) 2 and 0.75mol of MgSO 4 ·7H 2 O, stir until dissolved evenly to form a mixed solution of nickel nitrate, strontium sulfate and magnesium sulfate heptahydrate. The mixed solution was fully stirred evenly, and then added (NH 4 ) 2 CO 3 and NH 3 h 2 O, stop adding until precipitation occurs. After filtering and washing the precipitate, put it in an oven at 110°C, take it out after 12 hours, put it in a muffle furnace for roasting, raise the temperature to 800°C at a rate of 5°C per minute and keep it for 10 hours, then cool with the furnace, take it out and break it And sieve to make 60-80 mesh catalyst particles.

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Abstract

The invention relates to a catalyst for coke oven gas dual-system synthesis of synthesis gas and a preparation method thereof. The catalyst is composed of Sr y B x / Mg 1‑x O, wherein B is an active metal, x=0.05-0.5, y=0.01-0.2, and the particle size is 60-80 mesh. The preparation method of the catalyst comprises the following steps: successively adding nickel salt, strontium salt, magnesium salt or magnesium oxide into deionized water or distilled water at room temperature to dissolve into a mixed solution; After standing still and filtering, a solid substance is obtained; the solid substance is baked at 90-130° C. for 2-5 hours, and then roasted to obtain a catalyst; the catalyst is ground into powder, and then pressed into a tablet; the catalyst sheet is broken after heat treatment And sieve, make the described catalyst of 60-80 purpose. The catalyst of the invention has high catalytic activity, extremely strong anti-carbon performance and strong thermal stability.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a catalyst for coke oven gas double system synthesis gas and its preparation method and application. Background technique [0002] Steel Industry CO 2 The emission pressure is huge. In 2007, my country's crude steel output reached 489 million tons, and CO 2 The direct emissions amounted to 1.03 billion tons, accounting for about 2 About 16% of the emissions, is second only to the power industry in my country's industrial field of CO 2 big emitters. Hydrogen metallurgy is the solution to CO 2 Efficient way of emission, hydrogen replaces carbon as reducing agent, will fundamentally solve CO 2 emissions problem. At present, the stable supply of low-cost hydrogen-rich reducing gas source is an important guarantee for realizing the new hydrogen reduction metallurgy process. At this stage, large-scale hydrogen production still mainly relies on fossil fuels. The hydrogen-rich ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/78B01J35/10C01B3/40
CPCC01B3/40B01J23/78B01J35/613B01J35/633B01J35/647Y02P20/52
Inventor 杨志彬汪学广邹秀晶耿淑华张玉文郭曙强鲁雄刚丁伟中
Owner JIANGSU UNIV OF SCI & TECH
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