水蒸气强化纤维素模板改性钙基吸附剂固碳性能及强度
Chemical Industry and Engineering Progress（2023）
安徽建筑大学
Abstract
采用挤出-滚圆法制备了纤维素模板水泥支撑钙基吸附剂颗粒,基于双固定床反应器探究了煅烧时蒸汽活化对改性吸附剂的CO2捕获性能、力学性能和微观结构的影响特性.实验结果表明,在热致烧结和气氛诱导烧结共同作用下,吸附剂颗粒形成较稳定的孔隙结构,固碳量和力学强度均维持在较高水平.煅烧时通入10％(体积分数)水蒸气,含10％(质量分数)纤维素和5％(质量分数)水泥的吸附剂第20次循环CO2捕获量为0.32g/g,相比原始吸附剂(0.138g/g)和未活化的合成吸附剂(0.20g/g)分别提高了132％和60％.且活化后颗粒平均破碎强度为14.7N,比无蒸汽条件下增强约2.7倍.50次长循环测试后,其强度进一步提升至20.5N.煅烧时蒸汽活化可同时显著提升吸附剂CO2捕获量和力学性能.
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