A review on the emerging applications of cellulose, cellulose derivatives and nanocellulose in carbon capture

编号 020032204

推送时间 20211220

研究领域 林产化工 

年份 2021 

类型 期刊 

语种 英语

标题 A review on the emerging applications of cellulose, cellulose derivatives and nanocellulose in carbon capture

来源期刊 Environmental Research

期 第322期

发表时间 20210401

关键词 Cellulose;  Nanocellulose;  Adsorbent;  Membrane;  CO2; 

摘要 Carbon capture can be implemented at a large scale only if the CO2?selective materials are abundantly available at low cost. Since the sustainable requirement also elevated, the low-cost and biodegradable cellulosic materials are developed into CO2?selective adsorbent and membranes recently. The applications of cellulose, cellulosic derivatives and nanocellulose as CO2?selective adsorbents and membranes are reviewed here. The fabrication and modification strategies are discussed besides comparing their CO2?separation performance. Cellulose nanofibrils (CNFs) and cellulose nanocrystals (CNCs) isolated from cellulose possess a big surface area for mechanical enhancement and a great number of hydroxyl groups for modification. Nanocellulose aerogels with the large surface area were chemically modified to improve their?selectivity?towards CO2. Even with the reduction of surface area, amino-functionalized nanocellulose aerogels exhibited the satisfactory?chemisorption?of CO2?with a capacity of more than 2?mmol/g was recorded. Inorganic fillers such as silica, zeolite and MOFs were further incorporated into nanocellulose aerogels to enhance the physisorption of CO2?by increasing the surface area. Although CO2?adsorbents developed from cellulose and cellulose derivatives were less reported, their applications as the building blocks of CO2?separation membranes had been long studied. Cellulose acetate membranes were commercialized for CO2?separation, but their separation performance could be further improved with silane or inorganic filler. CNCs and CNFs enhanced the CO2?selectivity and permeance through polyvinyl alcohol coating on membranes, but only CNF membranes incorporated with MOFs were explored so far. Although some of these membranes surpassed the upper-bound of Robeson plot, their stability should be further investigated.

服务人员 尚玮姣

服务院士 宋湛谦

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