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采用草木灰对铁矿石载氧体进行修饰,在1kW_(th)串行流化床反应器上,以合成气(CO+H_2+CH_4)为燃料进行了化学链实验,对其反应活性进行测试。结果表明:生物质灰修饰铁矿石载氧体在1kW_(th)串行流化床上表现出较高的反应活性,且反应温度越高,反应活性越好;燃料反应器出口CO和CH_4体积分数显著降低,930℃下分别为0.12%和2.63%,与采用纯铁矿石相比分别降低了97.3%和16.0%,CO_2捕集效率提升明显,最大值达89.38%;SEM分析表明,反应后的铁矿石颗粒表面出现了晶粒熔融粘接的现象,但生物质灰修饰铁矿石的孔隙结构仍较为明显;EDS分析表明生物质灰修饰铁矿石中K的负载情况较为稳定,没有出现明显的流失现象。
The iron ore oxygen carrier was modified by ash, and chemical reaction was carried out on 1kW serial fluidized bed reactor with synthetic gas (CO + H_2 + CH_4) as fuel, and its reactivity was tested . The results showed that the biomass ash modified iron ore oxygen carrier showed higher reactivity in the 1kW th serial fluidized bed and the higher the reaction temperature, the better the reactivity. The CO and CH_4 The volume fraction decreased significantly by 0.12% and 2.63% at 930 ℃, and decreased by 97.3% and 16.0% respectively compared with the pure iron ore. The CO 2 capture efficiency increased obviously with the maximum of 89.38%. SEM analysis showed that, However, the porous structure of iron ore modified by biomass ash is still obvious. EDS analysis shows that the load of K in biomass-ash-modified iron ore is relatively stable , There is no obvious loss phenomenon.