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基于化学链燃烧新流程,采用固定床反应器研究了Cu基载氧体粒度、作为活性组分的Cu粉粒度及作为惰性载体的γ-Al2O3粒度对载氧体反应性能的影响.结果表明,载氧体的还原率及氧化率随Cu粉粒度减小而增大,Cu粉平均粒度小于63μm时,载氧体还原率和氧化率达95%和93%以上.载氧体还原过程中有少量CH4生成,生成量随Cu粉粒度减小而减少,Cu粉平均粒度小于32μm时低于1%;当载氧体粒度接近γ-Al2O3粒度时,载氧体的性能明显降低,只有γ-Al2O3粒度明显小于载氧体粒度时,γ-Al2O3才能起到分散活性组分、抑制活性组分烧结的作用.
Based on the new flow of chemical chain combustion, the effect of the particle size of Cu-based oxygen carrier, the particle size of Cu powder as active component and the particle size of γ-Al2O3 as inert carrier on the performance of oxygen carrier were investigated by fixed bed reactor. The reduction rate and the oxidation rate of the oxygen carrier increase with the decrease of Cu particle size. When the average particle size of Cu powder is less than 63μm, the oxygen reduction rate and oxidation rate of the oxygen carrier reach 95% and 93%, respectively. A small amount of CH4 was formed and the amount of CH4 decreased with the decrease of Cu particle size. The average particle size of Cu powder was less than 1% when the average particle size was less than 32μm. When the particle size of carrier was close to γ- When the Al2O3 particle size is obviously smaller than the carrier particle size, γ-Al2O3 can disperse the active component and inhibit the sintering of the active component.