水蒸气改善钙基CO2吸收剂循环活性的研究

对钙基CO2吸收剂的循环活性改善进行了研究,分析了水蒸气处理对吸收剂的最大转化率、比表面积及孔分布等微观结构变化的影响。结果表明,经水蒸气处理后,钙基CO2吸收剂的循环活性得到了改善,最大转化率比未经水蒸气处理可提高约50百分点;水蒸气处理可大大提高钙基CO2吸收剂的比表面积,并有效改善其孔径分布状态,可使其稳定保持较高的转化率;含碳能源直接制氢过程可在不需要任何添加剂或辅助手段的条件下,有效保持钙基CO2吸收剂的循环活性。

Study on the improvement of the carbonation characteristics of Ca-based CO2 absorbent by steam repetitive calcination-carbonation

Repetitive calcination-carbonation of Ca-based CO2 absorbent with adding steam was performed experimentally to investigate the effect of steam on the cyclic characteristics of Ca-based CO2 absorbent.The maximum conversion rate,pore radius and specific surface area microstructure of hydrated Ca-based CO2 absorbent was analyzed.Results showed that the cyclic characteristics of the hydrated Ca-based CO2 absorbent was improved,the maximum conversion of Ca-based CO2 absorbent was increased by 50% than dry ones.The reason was that the steam treatment could greatly increase the specific surface area of the absorbent and improve the distributions of pore radius.From the experiment we can conclude that direct hydrogen production by carbon energy could be realized without any additives or auxiliary conditions,which would meatain the cyclic activity of Ca-based CO2 absorbent.