| Economical and Sustainable Synthesis of Small-Pore Chabazite Catalysts for NOx Abatement by Recycling Organic Structure- Directing Agents | |
| Xiong, Wuwan; Liu, Linhui; Guo, Anqi; Chen, Dongdong; Shan, Yulong; Fu, Mingli; Wu, Junliang; Ye, Daiqi; Chen, Peirong | |
| 2023 | |
| Source Publication | ENVIRONMENTAL SCIENCE & TECHNOLOGY
 |
| ISSN | 0013-936X |
| Pages | 1-11 |
| Abstract | The application of small-pore chabazite-type SSZ-13 zeolites, key materials for the reduction of nitrogen oxides (NOx) in automotive exhausts and the selective conversion of methane, is limited by the use of expensive N,N,N-trimethyl-1-ammonium adamantine hydroxide (TMAdaOH) as an organic structure-directing agent (OSDA) during hydrothermal synthesis. Here, we report an economical and sustainable route for SSZ-13 synthesis by recycling and reusing the OSDA-containing waste liquids. The TMAdaOH concentration in waste liquids, determined by a bromocresol green colorimetric method, was found to be a key factor for SSZ-13 crystallization. The SSZ-13 zeolite synthesized under optimized conditions demonstrates similar physicochemical properties (surface area, porosity, crystallinity, Si/Al ratio, etc.) as that of the conventional synthetic approach. We then used the waste liquid-derived SSZ-13 as the parent zeolite to synthesize Cu ion-exchanged SSZ-13 (i.e., Cu-SSZ-13) for ammonia-mediated selective catalytic reduction of NOx (NH3-SCR) and observed a higher activity as well as better hydrothermal stability than Cu-SSZ-13 by conventional synthesis. In situ infrared and ultraviolet-visible spectroscopy investigations revealed that the superior NH3-SCR performance of waste liquid-derived Cu-SSZ-13 results from a higher density of Cu2+ sites coordinated to paired Al centers on the zeolite framework. The technoeconomic analysis highlights that recycling OSDA-containing waste liquids could reduce the raw material cost of SSZ-13 synthesis by 49.4% (mainly because of the higher utilization efficiency of TMAdaOH) and, meanwhile, the discharging of wastewater by 45.7%. |
| Department | 大气环境与污染控制实验室 |
| Keyword | SSZ-13 waste liquid TMAdaOH low cost NOx reduction |
| Document Type | 期刊论文 |
| Identifier | https://ir.rcees.ac.cn/handle/311016/48449 |
| Collection | 大气环境与污染控制实验室 |
| Affiliation | 1.South China University of Technology 2.Chinese Academy of Sciences 3.Research Center for Eco-Environmental Sciences (RCEES) |
| Recommended Citation GB/T 7714 | Xiong, Wuwan,Liu, Linhui,Guo, Anqi,et al. Economical and Sustainable Synthesis of Small-Pore Chabazite Catalysts for NOx Abatement by Recycling Organic Structure- Directing Agents[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2023:1-11. |
| APA | Xiong, Wuwan.,Liu, Linhui.,Guo, Anqi.,Chen, Dongdong.,Shan, Yulong.,...&Chen, Peirong.(2023).Economical and Sustainable Synthesis of Small-Pore Chabazite Catalysts for NOx Abatement by Recycling Organic Structure- Directing Agents.ENVIRONMENTAL SCIENCE & TECHNOLOGY,1-11. |
| MLA | Xiong, Wuwan,et al."Economical and Sustainable Synthesis of Small-Pore Chabazite Catalysts for NOx Abatement by Recycling Organic Structure- Directing Agents".ENVIRONMENTAL SCIENCE & TECHNOLOGY (2023):1-11. |
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| Economical and Susta（6501KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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