School of Environment, Tsinghua University, Beijing, 100084, China.
School of Environment, Tsinghua University, Beijing, 100084, China.
J Environ Manage. 2023 Jan 1;325(Pt A):116438. doi: 10.1016/j.jenvman.2022.116438. Epub 2022 Oct 11.
In recent years, global warming has become an important topic of public concern. As one of the most promising carbon capture technologies, solid amine adsorbents have received a lot of attention because of their high adsorption capacity, excellent selectivity, and low energy cost, which is committed to sustainable development. The preparation methods and support materials can influence the thermal stability and adsorption capacity of solid amine adsorbents. As a supporting material, it needs to meet the requirements of high pore volume and abundant hydroxyl groups. Industrial and biomass waste are expected to be a novel and cheap raw material source, contributing both carbon dioxide capture and waste recycling. The applied range of solid amine adsorbents has been widened from flue gas to biogas and ambient air, which require different research focuses, including strengthening the selectivity of CO to CH or separating CO under the condition of the dilute concentration. Several kinetic or isotherm models have been adopted to describe the adsorption process of solid amine adsorbents, which select the pseudo-first order model, pseudo-second order model, and Langmuir isotherm model most commonly. Besides searching for novel materials from solid waste and widening the applicable gases, developing the dynamic adsorption and three-dimensional models can also be a promising direction to accelerate the development of this technology. The review has combed through the recent development and covered the shortages of previous review papers, expected to promote the industrial application of solid amine adsorbents.
近年来，全球变暖已成为公众关注的重要议题。作为最有前途的碳捕获技术之一，固体胺吸附剂因其吸附容量高、选择性好、能耗低等优点，受到了广泛关注，致力于可持续发展。制备方法和支撑材料会影响固体胺吸附剂的热稳定性和吸附容量。作为支撑材料，它需要满足高孔体积和丰富羟基基团的要求。工业和生物质废料有望成为一种新型且廉价的原料来源，既能实现二氧化碳捕获，又能实现废物回收。固体胺吸附剂的应用范围已从烟道气拓宽到沼气和环境空气，这需要不同的研究重点，包括加强 CO 对 CH 的选择性或在稀释浓度下分离 CO。几种动力学或等温线模型已被采用来描述固体胺吸附剂的吸附过程，其中最常用的是拟一级模型、拟二级模型和朗缪尔等温线模型。除了从固体废弃物中寻找新型材料和拓宽适用气体外，开发动态吸附和三维模型也可能是加速该技术发展的一个有前途的方向。本文综述了近年来的发展，并涵盖了以往综述文章的不足之处，有望促进固体胺吸附剂的工业应用。
