Preparation method of an oxygen carrier suitable for hydrogen production by chemical-chain reforming of methane and product
A technology for chemical chain methane, reforming hydrogen production, applied in chemical instruments and methods, inorganic chemistry, hydrogen/synthesis gas production, etc., can solve the problem of chemical chain process cycle frequency cannot be reduced, operating costs are difficult to reduce, and high cycle energy consumption. and other problems, to achieve the effect of excellent product performance, selectivity and high reactivity
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Embodiment 1
[0048] According to the molar ratio of metal ions Ba:Co=1:1, configure its nitrate solution, and add citric acid and EDTA in the ratio of the sum of molar ratios of metal ions:citric acid:EDTA=1:1.5:1, and then add ammonia water until the solution pH=8±0.2.
[0049] By BaCoO 3 20% by mass, CeO 2 Add cerium oxide at a mass percentage of 75%, and stir at 80° C., with a stirring speed of 200r / min˜400r / min. After stirring for 5 hours, a sol mixed with cerium oxide particles was formed, and then the collected sol was dried at 105° C. for 12 hours, followed by calcination at 400° C. for 3 hours, and calcination at 850° C. for 5 hours.
[0050] After cooling and grinding the resulting product, press K 2 CO 3 The mass percentage is 5% as the benchmark, with a concentration of 0.5mol / L K 2 CO 3 The solution is impregnated, dried, pressed into tablets and ground, and the product obtained after sieving with 100-200 mesh is the finished oxygen carrier.
Embodiment 2
[0052] According to the molar ratio of metal ions Ba:Co=1:1, configure its nitrate solution, and add citric acid and EDTA in the ratio of the sum of molar ratios of metal ions:citric acid:EDTA=1:1:0.8, and then add ammonia water until the solution pH=8±0.2.
[0053] By BaCoO 3 10% by mass, CeO 2 Add cerium oxide at a mass percentage of 85%, and stir at 85° C., with a stirring speed of 200r / min˜400r / min. After stirring for 5 hours, a sol mixed with cerium oxide particles was formed, and then the collected sol was dried at 115° C. for 15 hours, followed by calcination at 600° C. for 1.5 hours, and calcination at 1000° C. for 2 hours.
[0054] After cooling and grinding the resulting product, press K 2 CO 3 The mass percentage is 5% as the benchmark, with a concentration of 0.4mol / L K 2 CO 3 The solution is impregnated, dried, pressed into tablets and ground, and the product obtained after sieving with 100-200 mesh is the finished oxygen carrier.
Embodiment 3
[0056]According to the molar ratio of metal ions Ba:Co=1:1, configure its nitrate solution, and add citric acid and EDTA in the ratio of the sum of molar ratios of metal ions:citric acid:EDTA=1:1:1.2, and then add ammonia water until the solution pH=8±0.2.
[0057] By BaCoO 3 50% by mass, CeO 2 Add cerium oxide at a mass percentage of 45%, and stir at 70° C., with a stirring speed of 200r / min˜400r / min. After stirring for 5 hours, a sol mixed with cerium oxide particles was formed, and then the collected sol was dried at 115° C. for 13 hours, followed by calcination at 500° C. for 2 hours, and 900° C. for 3 hours.
[0058] After cooling and grinding the resulting product, press K 2 CO 3 The mass percentage is 5% as the benchmark, with a concentration of 1mol / L K 2 CO 3 The solution is impregnated, dried, pressed into tablets and ground, and the product obtained after sieving with 100-200 mesh is the finished oxygen carrier.
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