In this study, a novel sorbent material based on CaO and Fe₂O₃ was investigated for its performance in CO₂ capture from simulated biomass gasification producer gas. Experiments were conducted in a fixed bed reactor and each run of the experiments included three major stages of sorbent material reduction, CO₂ capture (carbonation), and CO₂ release (calcination). The operation temperature in the CO₂ capture stage was controlled at 590, 620, 650, and 680 °C, while the temperature for the CO₂ release was maintained at 850 °C. The duration of the CO₂ capture stage was 3 h and that of the CO₂ release stage was 2 h. The effect of cycles of carbonation–calcination looping of the sorbent material was also investigated at the carbonation temperature of 650 °C. The experimental results show that effective CO₂ capture by the sorbent material occurred in the initial 20 min during the carbonation. In the calcination stage, the rate of CO₂ release reached the peak in 30–40 min from the start of the calcination. The carbonation temperature has a significant effect on CO₂ capture and the optimum carbonation temperature was found to be 620 °C, at which CO₂ capture efficiency was 94% for the first cycle and 90.4% as average for the first three cycles. It was also found that the CO₂ capture efficiency was reduced with cycling. Mechanisms of the CO₂ capture and the effect of cycling were also examined.

中文翻译：

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使用新型钙和铁基吸收剂通过碳化-煅烧循环从生物质气化生产气中捕获CO ₂

在这项研究中，研究了一种基于CaO和Fe ₂ O ₃的新型吸附剂材料在模拟生物质气化生产气中捕获CO _2中的性能。实验是在固定床反应器中进行的，实验的每轮操作都包括吸附剂还原，CO ₂捕集（碳酸化）和CO ₂释放（煅烧）三个主要阶段。将CO ₂捕集阶段的操作温度控制在590、620、650和680°C，同时将释放CO ₂的温度保持在850°C。的CO的持续时间₂的捕获阶段是3小时，使CO的₂释放阶段为2小时。还研究了在650°C的碳化温度下吸附剂材料的碳化－煅烧循环的循环的影响。实验结果表明，在碳化过程的最初20分钟内，吸附剂材料有效捕获了CO ₂。在煅烧阶段，从煅烧开始，CO ₂释放速率在30-40分钟内达到峰值。碳酸化温度对CO _2的捕集有显着影响，最佳碳酸化温度为620°C，在该温度下，第一循环的CO ₂捕集效率为94％，前三个循环的平均值为90.4％。还发现CO ₂捕获效率随循环而降低。还研究了CO ₂捕获的机理和循环的影响。