摘要
全球范围已就“2℃气候红线”达成共识。为缓解气候变暖,同时满足经济发展的能源需求,CO_(2)大规模减排技术受到了广泛关注。其中,CO_(2)捕集、利用与封存(CCUS)技术被认为是实现减排的最理想途径。而无论对于CO_(2)的利用还是封存,CO_(2)捕集都是必要的前提。近年来,空气中CO_(2)的捕集开始逐渐受到关注,但从源头控制出发,工业源的CO_(2)捕集仍是减排的重点所在。目前工业应用的CO_(2)捕集技术——胺洗涤仍存在成本高且产物具有环境毒性等问题。与之相比,固体CO_(2)捕集材料在生产、运输、应用上都具有独特的优势,鉴于工业CO_(2)普遍温度较高,越来越多的研究致力于固体高温CO_(2)吸附剂的构建。目前,固体材料高温CO_(2)捕集已进入中试阶段。为实现工业化应用,吸附材料的成本、吸附性能和循环稳定性都受到重点关注。常规的高温CO_(2)吸附材料CaO、Li 4SiO 4都存在多次循环后易发生烧结而导致吸附性能下降的问题,虽然可以通过改进合成方法、元素掺杂、表面修饰等手段对其进行改性,但这无疑会造成成本的增加。对此,许多研究者开始利用工业固体废弃物或廉价矿石合成高温CO_(2)吸附剂。大量研究结果表明,使用天然/废弃原料不仅可以降低吸附剂的生产成本,还可以实现固体废弃物的资源化,原料中的部分杂质组分还对吸附剂的抗烧结性能有着重要的促进作用,这对固体高温CO_(2)吸附剂的实际应用有着重要的价值。基于天然/废弃原料合成高温CO_(2)吸附剂的良好应用前景,为助力廉价高效CO_(2)吸附剂的研发,本文综述了近十年来以工业固体废弃物和廉价矿石为原料制备CaO基和Li 4SiO 4基两种高温CO_(2)吸附剂的研究进展;分别介绍了制备高温吸附剂的各类前驱体及改性材料,如矿石(石灰石、白云石、高岭土、硅藻土、蛭石、方解石、埃洛石、铝土矿尾�
Aglobal consensus has been reached on the“2℃climate red line”.In order to mitigate climate warming and meet the energy needs of economic development,CO_(2) emission reduction technologies have attracted wide attention.Among them,CO_(2)capture,utilization and storage(CCUS)technology is considered as the most ideal way to achieve emission reduction.CO_(2) capture is a necessary prerequisite for both utilization and storage of CO_(2).In recent years,air CO_(2)capture has been gradually concerned,but from the perspective of source control,CO_(2) capture from industrial sources is still the focus of emission reduction.At present,the industrial application of CO_(2) capture technology amine washing still has the problems of high cost and environmental toxicity.In contrast,solid CO_(2) capture materials have unique advantages in production,transportation and application.In view of the generally high temperature of industrial CO_(2),more and more researches are devoted to the construction of solid high-temperature CO_(2) adsorbents.At present,the high temperature CO_(2) capture of solid materials has entered the pilot-scale.In order to realize industrial application,the cost,adsorption performance and cycling stability of adsorptive materials have been paid much attention.Conventional high temperature CO_(2) adsorption materials,CaO and Li 4SiO 4,are prone to sintering after multiple cycles,resulting in a decline in adsorption performance.Although they can be modified by improving the synthesis method,element doping,surface modification and other means,there is no doubt that this will cause an increase in cost.In response,many researchers have begun to synthesize high-temperature CO_(2) adsorbents from industrial solid waste or cheap ore.A large number of research results show that the use of natural/waste raw materials can not only reduce the production cost of the adsorbent and realize the recycling of solid waste,but also some of the impurities in the raw materials have an important role in promoting the anti-si
作者
范文琦
潘登
黄亮
王强
FAN Wenqi;PAN Deng;HUANG Liang;WANG Qiang(College of Environmental Science and Engineering,Beijing Forestry University,Beijing 100083,China;Wuhan Kaidi Water Service Co.,Ltd.,Wuhan 430000,China)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2021年第17期17090-17102,共13页
Materials Reports
基金
中央高校基本科研业务费专项资金(2019JQ03015)
国家自然科学基金(U1810209)
兵团国际科技合作计划(2018BC002)
北京高校高精尖学科建设项目“生态修复工程学”。
关键词
高温CO_(2)捕集材料
矿石
工业固体废物
吸-脱附循环
氧化钙
硅酸锂
high temperature CO_(2)capture material
ore
industrial solid waste
adsorption-desorption cycle
calcium oxide
lithium silicate
