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水热合成的考林组状/海绵状酸盐,用于增强蒸气捕获

Tengfei He¹, Zifeng Luo¹, Baosheng Jin¹

¹Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, Southeast University, Nanjing, Jiangsu 210096, China.

Journal of hazardous materials

|August 21, 2024

概括

酸性条件会产生类似海绵的酸 (NC2.6) 用于高温化 (PbCl2) 的吸附. 水通过将PbCl2转化为氧化物来增强吸附,而CO2通过共价键影响稳定性.

科学领域:

材料科学材料科学材料科学
环境工程环境工程
化学工程是化学工程的重要组成部分.

背景情况:

开发高温吸附剂对于处理热解重金属废物至关重要.
酸由于其可调节的多孔结构,具有潜在的潜力.

研究的目的:

为了合成具有优越的多孔性质的耐高温酸.
为了评估它们在吸附化 (PbCl2) 蒸气中的效率.
研究CO2和H2O对吸附机制的影响.

主要方法:

在不同的pH条件下,酸的热水合成.
孔隙性质的表征 (表面积,孔隙体积).
在高温下进行PbCl2蒸汽吸附实验.
密度函数理论 (DFT) 和大法典蒙特卡洛 (GCMC) 模拟.

主要成果:

酸性条件 (pH 2.6) 产生了类似海绵的NC2.6 具有高表面积 (500.31 m2/g) 和毛孔体积 (0.986 cm3/g).
与高和化石相比,NC2.6显示出较高的PbCl2吸附率 (137.68 mg/g在700 °C)
通过形成氧化物,H2O的吸附量增加到144.24 mg/g; CO2通过竞争性吸附对吸附产生负面影响,但通过共价键增强稳定性.

结论:

酸诱导的热水合成对于制造高性能PbCl2吸附剂是有效的.
了解H2O和CO2的作用对于优化热解环境中的吸附过程至关重要.
模拟提供了对吸附机制的洞察,有助于吸附剂设计.

关键词:

密度函数理论密度函数理论在Halloysite中使用Halloysite.考利尼特 (Kaolinite) 是一种石头.状/海绵形酸.PbCl(2) 的吸附作用.

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