摘要
碳捕集、利用与封存(CCUS)技术是缓解温室效应的有效途径。使用固体吸附剂捕集CO_(2)是减少CO_(2)排放的可靠途径之一。在各种固体吸附剂中,MgO基吸附剂由于具有来源广泛、再生温度低以及理论吸附容量高的特点备受关注。但成型后的MgO基吸附剂颗粒面临着机械强度低、稳定性差和极易逸出反应器等问题,难以在工业中被广泛应用。重点总结了不同成型方法以及成型工艺条件对MgO基吸附剂的CO_(2)吸附性能的影响。在MgO基吸附剂成型时,颗粒尺寸较小的吸附剂的碳酸化速率较快,磨耗率较低。添加适量成型助剂和蒸汽可以改善吸附剂颗粒的化学性能和机械强度,但较高的煅烧温度会加剧吸附剂颗粒的烧结和磨损。今后,MgO基CO_(2)吸附剂成型技术的研究重点应以简单的工艺、低成本和良好的循环稳定性为立足点,制备既具有良好CO_(2)吸附性能,又具有良好机械性能的吸附剂颗粒应用于工业化CO_(2)捕集。
Carbon capture,utilization and storage(CCUS)technology is an effective way to mitigate the greenhouse effect.Using solid adsorbents to capture CO_(2) is considered to be one of reliable ways of reducing CO_(2) emissions.MgO-based adsorbents have attracted much attention due to their wide source,low regeneration temperature and high theoretical adsorption capacity in various solid adsorbents.However,the formed MgO-based adsorbents still face the problems of low mechanical strength,poor stability and easy to escape from the reactor,so they are difficult to be widely used in industry.The effects of different granulation methods and granulation process conditions on the CO_(2) adsorption performance of MgO-based adsorbents were summarized.In the granulation process,the MgO-based adsorbents with smaller particle sizes have faster carbonation rates and lower wear rates.The chemical properties and mechanical strength of adsorbent particles can be improved by adding proper amount of granulation additives and steam.However,higher calcination temperatures can exacerbate sintering and wear of absorbent particles.In the future,the research should focus on developing simplified processes,low costs and good cycle stability,and prepare absorbent particles with both excellent CO_(2) adsorption performance and mechanical properties for industrial-scale CO_(2) capture.
作者
宋锦博
屈婷
荆洁颖
李文英
SONG Jinbo;QU Ting;JING Jieying;LI Wenying(State Key Laboratory of Clean and Efficient Coal Utilization,Taiyuan University of Technology,Taiyuan 030024,Shanxi,China;Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering,Taiyuan 030000,Shanxi,China)
出处
《低碳化学与化工》
CAS
北大核心
2024年第7期1-12,共12页
Low-Carbon Chemistry and Chemical Engineering
基金
国家重点研发计划(2022YFE0208400)
山西浙大新材料与化工研究院研发项目(2021SX-FR002)
中央高校基本科研业务费专项资金(2022ZFJH004)。
