改性钙基吸附剂在热解原位捕集CO_(2)中的性能

Research on modified calcium based adsorbents for in-situ CO_(2) capture through pyrolysis

鉴于固废热解原位吸附CO_(2)存在温度较高和吸附剂易烧结的挑战,采用了不同矿物掺杂的天然石灰石制备了一系列钙基固体吸附剂.热解原位单次吸附和循环吸附实验表明,10%蒙脱土掺杂的钙基吸附剂表现出较为稳定的循环吸附特性和更大的吸附负荷,其CO_(2)吸附比最高可达71.52%.在经过10次循环后,仍能保持43.77%的吸附量,同时使热解气热值达到14kJ/g.因此,10%蒙脱土掺杂的钙基吸附剂在固废共热解中能够有效捕集CO_(2),提高热解气热值,具有良好的应用前景.

Addressing the challenge of high in-situ adsorption temperature in solid waste pyrolysis,we developed a series of calcium-based solid adsorbents by incorporating various minerals into natural limestone.Experimental investigations on the single adsorption and cyclic adsorption of CO_(2) by these calcium-based solid adsorbents revealed that the adsorbent doped with 10%montmorillonite exhibited stable cyclic adsorption characteristics and a substantial adsorbent capacity,achieved a maximum CO_(2) adsorption ratio of 71.52%.Even after 10cycles,the adsorption capacity remained at 43.77%,concurrently elevated the heat value of pyrolysis gas to 14kJ/g.Consequently,the calcium-based adsorbents doped with 10%montmorillonite demonstrated effective CO_(2) capture and contribute to the enhanced calorific value of pyrolysis gas in solid waste co-pyrolysis.