期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 293, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2021.120235
关键词
Catalytic hydrodechlorination; Diclofenac; Catalytic membrane reactor; Pd-structured catalysts; Drinking water treatment
资金
- Spanish MINECO [PCI2020-112013, BES-2017-081346, RYC-2016-20648]
- CM [P2018/EMT-4341, PEJD-2019-POST/AMB15764]
- Programa Operativo de Empleo Juvenil [PEJD-2019-POST/AMB15764]
The study developed a Pd/CMR reactor for hydrodechlorination of chlorinated micropollutants, successfully degrading the anti-inflammatory drug diclofenac with high stability and a conversion rate of 60%. The technology is insensitive to initial concentration and demonstrates versatility in real water matrices like tap water.
This work is focused on the development of a Pd-based catalytic membrane reactor (Pd/CMR) for its application in continuous flow hydrodechlorination (HDC) of chlorinated micropollutants. A cylindrical inert porous alumina membrane was decorated on the outer with well-dispersed Pd nanoparticles (0.2 % wt.). The Pd/CMR was fully characterized by different techniques. The catalytic system was applied for the degradation of the persistent anti-inflammatory drug diclofenac (DCF) under ambient conditions. A remarkable stability was observed upon long-term HDC reaction, with a reasonable DCF conversion (60 %). Notably, as the process could be described by pseudo-first order kinetic, the initial concentration did not affect the final conversion achieved. Finally, the versatility of the system was successfully demonstrated using a real aqueous matrix (tap water). All in all, Pd/CMR exhibited a remarkable feasibility for the implementation of the HDC technology on a larger scale, showing an extraordinary catalytic performance for up to 200 h.
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