将危险废物再循环转化为高性能Ni/η-Al2O3催化剂,用于CO2甲化
Qaisar Maqbool1, Hamilton Uchenna Aharanwa1, Michael Stöger-Pollach2
1Institute of Materials Chemistry, TU Wien Getreidemarkt 9/BC 1060 Vienna Austria guenther.rupprechter@tuwien.ac.at.
Green chemistry : an international journal and green chemistry resource : GC
|February 17, 2025
概括
这项研究将废弃的Ni-MH电池和片转化为先进的纳米催化剂 (NCts),以有效地化二氧化碳. 由此产生的Ni/η-Al2O3NCts显示出高性能和可回收性,促进了可持续的资源管理.
科学领域:
- 材料科学:从废物中开发新的纳米催化剂.
- 催化:对二氧化碳化和甲化机制的研究.
- 环境科学:可持续的废物管理和资源回收利用.
背景情况:
- 废弃的Ni-MH电池和板是大量的废弃物.
- 开发有效的催化剂用于二氧化碳转化对于环境修复至关重要.
- 将废物再循环转化为有价值的材料提供了可持续的解决方案.
研究的目的:
- 从废弃的Ni-MH电池和片中合成Ni/η-Al2O3纳米催化剂 (NCts).
- 为了评估这些NCts用于CO2化的催化性能.
- 为了阐明合成的催化剂上的二氧化碳甲化机制.
主要方法:
- 从电池废弃物中提取硫酸,并将其转化为Ni(OH) 2前体.
- 废旧的纸加工成 (Al2O3).
- 合成不同Ni负载 (4%和8%) 的Ni/η-Al2O3NCts.
- 使用XRD/SAED,STEM/EFTEM和EELS进行表征.
- 对于二氧化碳化和运行DRIFTS研究的催化试验.
主要成果:
- 在一个无序的立方η-Al2O3支架上成功合成了Ni/η-Al2O3NCts与分散的Ni粒子.
- 8%的Ni/η-Al2O3催化剂实现了99.8%的CH4选择性,并在400°C时达到80.3 mmolCHgcat-1h-1的时空产量.
- 运行DRIFTS建议通过formate和 methoxy中间体通过优先的关联CO2甲化途径.
- 已证明使用过的NCt的可回收利用性,使其重新变成Ni和Al前体.
结论:
- 废物可以有效地再循环转化为高性能纳米催化剂.
- 从废物中提取的Ni/η-Al2O3NCts显示了CO2甲化显著的潜力.
- 这项研究为二氧化碳化机制和催化剂可回收性提供了宝贵的见解.
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