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首页> 外文会议>2nd international conference on energy sustainability 2008 >IMMOBILIZATION OF CALCIUM OXIDE ABSORBENT ON A FIBROUS ALUMINA MAT FOR HIGH TEMPERATURE CARBON DIOIXDE CAPTURE
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IMMOBILIZATION OF CALCIUM OXIDE ABSORBENT ON A FIBROUS ALUMINA MAT FOR HIGH TEMPERATURE CARBON DIOIXDE CAPTURE

机译：纤维状氧化铝垫上固定的氧化钙吸附剂用于高温二氧化碳捕集

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Anthropogenic carbon dioxide emission from its sources must be reduced to decrease the threat of global warming. Calcium oxide is considered as an effective carbon dioxide absorbent in biomass or coal gasification process as well as conventional power plants. It reacts with carbon dioxide to form calcium carbonate which can be decomposed into the original oxide and carbon dioxide at high temperature by calcination. In order to make this method practical for the carbon dioxide capture and sequestration, the performance of the calcium oxide absorbent must be maintained over a large number of carbonation/calcination cycles. For this reason, loss in the surface area of the absorbent due to pore plugging and sintering of particles in cyclic operation must be avoided.rnTo prevent or minimize this problem, a simple and effective procedure for immobilization of calcium oxide on a fibrous alumina mat was developed in this study. The prepared samples were observed by SEM and the cyclic performance of the calcium oxide absorbent was evaluated by TGA experiments and compared to the previous studies in literature. 75% and 62% maximum carbonation conversions of the prepared absorbents with 23 wt% and 55 wt% calcium oxide content were achieved respectively and remained stable even after ten cycles whereas conversion in the literature data dropped steeply with the number of cycles.
机译：必须减少其来源的人为二氧化碳排放量，以减少全球变暖的威胁。氧化钙被认为是生物质或煤气化过程以及常规电厂中有效的二氧化碳吸收剂。它与二氧化碳反应生成碳酸钙，碳酸钙在高温下可通过煅烧分解成原始氧化物和二氧化碳。为了使该方法可用于二氧化碳的捕获和封存，必须在大量的碳化/煅烧循环中保持氧化钙吸收剂的性能。因此，必须避免由于循环操作中的孔堵塞和颗粒烧结而造成的吸收剂表面积的损失。为了防止或最小化此问题，采用了一种简单有效的方法将氧化钙固定在纤维状氧化铝垫上在这项研究中开发。通过SEM观察制备的样品，并通过TGA实验评估氧化钙吸收剂的循环性能，并与文献中的先前研究进行比较。所制备的具有23wt％和55wt％的氧化钙含量的吸收剂的最大碳酸化转化率分别达到了75％和62％，即使在十个循环后仍保持稳定，而文献数据中的转化率随循环数而急剧下降。

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