Chemical looping combustion oxygen carrier and application method thereof
A technology of chemical looping combustion and application method, which is applied in the field of sintering and returning ore as the oxygen carrier of chemical looping combustion, which can solve the problems of not being able to enter the furnace, and achieve low price, avoid economic and social benefits, good reactivity and mechanical properties Effect
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Embodiment 1
[0017] 1) Screen the sintered ore to obtain an oxygen carrier with a particle size of 10 μm-500 μm, which is designated as oxygen carrier I, and its active component is α-Fe 2 o 3 , its mass percentage content is 75%; the mass percentage content of inert components is CaO: 10%, Al 2 o 3 : 2% and SiO 2 : 10%, the rest are impurities;
[0018] 2) Spread 300 mg of the oxygen carrier I obtained in step 1) on the bottom of the fixed-bed reactor (quartz tube). In a nitrogen atmosphere, the sample was heated to 800 °C; then, the nitrogen was switched to a reducing atmosphere (10% CH 4 ,90%N 2 ) Carry out a reduction experiment on the sample, and the constant temperature duration is 20 minutes; then stop the heat preservation, switch the reducing gas to nitrogen, and cool the sample under a nitrogen environment to obtain the oxygen carrier II;
[0019] 3) Spread 300 mg of the oxygen carrier I obtained in step 1) on the bottom of the fixed-bed reactor (quartz tube). In a nitroge...
Embodiment 2
[0026] 1) Screen the sintered ore to obtain an oxygen carrier with a particle size of 10 μm-500 μm, which is designated as oxygen carrier I, and its active component is α-Fe 2 o 3 , its mass percentage content is 80%; the mass percentage content of inert components is CaO: 10%, Al 2 o 3 : 2% and SiO 2 : 8%, the rest are impurities;
[0027] 2) Spread 300 mg of the oxygen carrier I obtained in step 1) on the bottom of the fixed-bed reactor (quartz tube). In a nitrogen atmosphere, the sample was heated to 750 °C; then, the nitrogen was switched to a reducing atmosphere (10% CH 4 ,90%N 2 ) to carry out the reduction experiment on the sample, and the constant temperature duration is 20 minutes; then the reducing gas is switched to nitrogen, and the quartz tube is purged for 5 minutes to remove the remaining reducing gas; then, the gas is switched to air, and the reduced sample is subjected to Oxidation, constant temperature ventilation for 20 minutes; then switch to nitrogen...
Embodiment 3
[0036] 1) Sieve the sintered ore to obtain an oxygen carrier with a particle size of 10 μm-500 μm, which is designated as oxygen carrier I;
[0037] 2) Spread 300 mg of the oxygen carrier I obtained in step 1) on the bottom of the fixed-bed reactor (quartz tube). In a nitrogen atmosphere, the samples were heated to 700, 750, 800, 850, and 900 °C; then, the nitrogen was switched to a reducing atmosphere (10% CH 4 ,90%N 2 ) carry out the reduction experiment on the sample, and the constant temperature lasts for 20 minutes; then the reducing gas is switched to nitrogen, and the quartz tube is purged for 5 minutes to remove the remaining reducing gas; then, the gas is switched to air, and the reduced sample is Oxidation, constant temperature ventilation for 20 minutes; then switch to nitrogen, purging for 5 minutes, then switch to reducing gas, a new cycle begins; after 10 cycles respectively, stop the heat preservation, switch the reducing gas to nitrogen, and make the sample C...
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