Breakthrough analysis on selective adsorption of CO2 from biogas by polyethylenimine-impregnated resins

IF 2.2 4区化学 Q3 CHEMISTRY, PHYSICAL Colloid and Polymer Science Pub Date : 2024-03-25 DOI:10.1007/s00396-024-05234-1

Haiyan Yang, Yue Gong, Xinzhong Wang, Yuanyuan Chen, Dajiang Yu

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Abstract

Polymer resin-based solid amine are prospective adsorbents used in removing CO₂ from biogas. Two commercial resins with different porous structures, AB-8 and ADS-17, were selected as supports to explore the influence of the support structures on adsorbent performance. It was discovered that macroporous channels greatly boost CO₂ adsorption at higher PEI loadings (≥ 30%), and their influence is more critical than total pore volume or specific surface area, though their impact is minimal at low PEI loadings. ADS-17-40% PEI demonstrated outstanding CO₂ adsorption of 208 mg·g⁻¹ in its 16th cycle under specific operating conditions. Increasing gas flow rate to 200 mL·min⁻¹ could promote CO₂ adsorption capacity and initial adsorption rate constant (k₀) calculated by the deactivation model. The highest adsorption capacity was achieved at 55 °C, when the temperature ranged from 25 to 90 °C.

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聚乙烯亚胺浸渍树脂选择性吸附沼气中二氧化碳的突破性分析

聚合物树脂基固体胺是用于去除沼气中二氧化碳的前景广阔的吸附剂。为了探索支撑结构对吸附剂性能的影响，我们选择了 AB-8 和 ADS-17 这两种具有不同多孔结构的商用树脂作为支撑。研究发现，在较高的 PEI 含量（≥ 30%）下，大孔通道能极大地促进二氧化碳的吸附，其影响比总孔容积或比表面积更为关键，但在较低的 PEI 含量下，大孔通道的影响微乎其微。在特定的操作条件下，ADS-17-40% PEI 在第 16 个循环中表现出卓越的二氧化碳吸附能力，吸附量达到 208 mg-g-1。将气体流速提高到 200 mL-min-1，可提高二氧化碳吸附容量和失活模型计算出的初始吸附速率常数（k0）。当温度在 25 ℃ 至 90 ℃ 之间时，55 ℃ 时的吸附容量最高。

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来源期刊

Colloid and Polymer Science 化学-高分子科学

CiteScore

4.60

自引率

4.20%

发文量

111

审稿时长

2.2 months

期刊介绍： Colloid and Polymer Science - a leading international journal of longstanding tradition - is devoted to colloid and polymer science and its interdisciplinary interactions. As such, it responds to a demand which has lost none of its actuality as revealed in the trends of contemporary materials science.