Ceramic catalyst taking red mud waste residues as carrier as well as preparation method and application thereof
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A catalyst and co-catalyst technology, applied in the direction of catalyst activation/preparation, catalyst carrier, chemical instruments and methods, etc., can solve the problems of shortage, formaldehyde pollution energy, etc., achieve high selectivity, solve secondary pollution, and simple preparation process Effect
Active Publication Date: 2020-05-12
南京环福新材料科技有限公司
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Problems solved by technology
The successful application of the present invention will not only completely solve the problem of safe disposal of red mud waste residue, but also solve the prob
Method used
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Embodiment 1
[0027] (1) Raw material crushing
[0028] After the red mud waste residue and aluminum chloride powder are pulverized by a ball mill respectively, they are passed through a 100-mesh standard sieve and homogenized for later use;
[0029] (2) Ingredients and granulation
[0030] Weigh 70g of red mud waste residue powder and 20g of aluminum chloride powder and stir evenly, then weigh 10g of polyethylene oxide solution and mix with the above powder for grinding and granulation;
[0031] (3) Molding and calcination
[0032] Weigh 5g of the granulated mud and add it to the mold, pressurize to 8MPa, take out the sample after holding the pressure for 5min, repeat the molding of the green body 20 times to obtain 20 ceramic spherical particle green bodies, and place them in a muffle furnace at 900°C Calcining with heat preservation for 4 hours to obtain a ceramic spherical particle carrier;
[0033] (4) Preparation of active component and co-catalyst precursor composite solution
[...
Embodiment 2
[0043] (1) Raw material crushing
[0044] After the red mud waste residue and aluminum chloride powder are pulverized by a ball mill respectively, they are passed through a 100-mesh standard sieve and homogenized for later use;
[0045] (2) Ingredients and granulation
[0046] Weigh 80g of red mud waste residue powder and 10g of aluminum chloride powder and stir evenly, then weigh 10g of polyethylene oxide solution and mix with the above powder for grinding and granulation;
[0047] (3) Molding and calcination
[0048] Weigh 5g of the granulated mud and add it to the mold, pressurize to 9MPa, hold the pressure for 5 minutes, take out the sample, repeat the molding of the green body 20 times to obtain 20 pieces of ceramic spherical particle green bodies, and place them in a muffle furnace at 1000°C Calcining with heat preservation for 4 hours to obtain a ceramic spherical particle carrier;
[0049] (4) Preparation of active component and co-catalyst precursor composite solut...
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Abstract
The invention discloses a ceramic catalyst taking red mud waste residues as a carrier as well as a preparation method and an application thereof. According to the catalyst, ceramic spherical particlesprepared from polluting red mud waste residues discharged when aluminum oxide is extracted in the aluminum production industry, aluminum source powder and a forming agent solution are used as carriers, molybdenum oxide is used as a catalytic active component, and zirconium oxide is used as a cocatalyst. The preparation method comprises the following steps: preparing a ceramic spherical particle carrier from red mud waste residues, aluminum source powder and a forming agent solution through crushing, burdening, granulating, forming, calcining and other processes; dipping the ceramic sphericalparticle carrier in an active component and co-catalytic ion precursor composite solution; drying the carrier, and roasting the carrier to obtain the ceramic-based reforming hydrogen production catalyst. The reforming hydrogen production catalyst not only can realize resource utilization of industrial waste residue red mud, but also is high in H2 selectivity of reforming formaldehyde to produce hydrogen at a low temperature, is simple in preparation process, and has a wide market application prospect.
Description
technical field [0001] The invention provides a ceramic-based catalyst with red mud waste residue as a carrier, a preparation method and application thereof, and belongs to the technical fields of resource utilization of waste products and new energy sources. Background technique [0002] As the world's largest producer of alumina, China discharges hundreds of millions of tons of red mud every year. The vast majority of alumina enterprises in my country remove most of the water in the red mud through mechanical press filtration and dehydration, and then stack the remaining dry red mud in the open air. The disposal cost accounts for about 5% of the output value of alumina products. As of the end of 2018, my country's cumulative stockpiled red mud exceeded 1.3 billion tons, covering an area of more than 120,000 mu. Almost all the red mud is stored in the open air without any effective use. At the same time, the main chemical elements of red mud are calcium, silicon, alumin...
Claims
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Application Information
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