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Types of Step-Growth Polymers: Polyesters01:20

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The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the...
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Author Spotlight: Standardizing the Development of Amine-Based Silica Composites as CO2 Adsorbents for Direct Air Capture
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开发复合氨基功能化聚微球,以有效捕获CO2.

Xuewen Chen1, Hongping Quan1,2,3, Jie Yu1

  • 1College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, 610500, People's Republic of China.

Environmental science and pollution research international
|December 29, 2023
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概括

一种使用四乙烯胺 (TEPA) 和2 - [2- ((dimethylamino) ethoxy]乙醇 (DMAEE) 的新复合氨基固体吸附剂有效捕获CO2. 这种材料在45%重量%的氨基含量和6:4 TEPA:DMAEE比率下表现出最佳性能,显示出减少温室气体的潜力.

关键词:
吸附机制是一种吸附机制.二氧化碳吸附方式接种复合胺的复合胺.复原表现 复原表现 复原表现

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科学领域:

  • 材料科学 材料科学 材料科学
  • 化学工程是化学工程的重要组成部分.
  • 环境科学 环境科学

背景情况:

  • 温室气体排放需要先进的二氧化碳捕获技术.
  • 新型固体吸附剂的开发对于有效的碳捕获至关重要.
  • 胺基功能化的材料提供了有前途的二氧化碳吸附能力.

研究的目的:

  • 开发一种用于二氧化碳捕获的新型复合氨基固体吸收剂.
  • 研究TEPA和DMAEE对二氧化碳吸附的协同作用.
  • 评估吸附剂的吸附动力学和再生性能.

主要方法:

  • 用甲基甲酸盐 (MMA) 和糖甲酸盐 (GMA) 功能化的聚微球载体的制备.
  • 同时使用四乙烯胺 (TEPA) 和2-[2-(dimethylamino) ethoxy]乙醇 (DMAEE) 的氨基功能化.
  • 使用模拟烟气的二氧化碳吸附实验,动力建模 (Avrami,伪一级,伪二级) 和循环再生试验.

主要成果:

  • 复合氨基吸附剂具有很高的二氧化碳捕获能力,在70°C时达到2.45mmol/g的最佳值,总氨基含量为45%的总氨基含量,TEPA:DMAEE比率为 6:4.
  • TEPA-DMAEE复合氨基系统的协同效应增强了CO2吸附.
  • 阿弗拉米运动模型比伪一阶和伪二阶模型更适合,表明物理吸收和化学吸收的共存.

结论:

  • 开发的复合氨基功能化聚微球是高效和选择性的二氧化碳吸附剂.
  • 吸附剂表现出良好的循环再生性能.
  • 该材料由于其稳定性和性能,在二氧化碳捕获方面具有实践应用的巨大潜力.