Journal
CHEMICAL ENGINEERING JOURNAL
Volume 412, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2021.128612
Keywords
Photoelectrocatalysis (PEC); Electrode materials; Reactors design; Pulping wastewater treatment; Hydrogen evolution reaction (HER), Energy consumption
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Funding
- Council of Scientific and Industrial Research, Government of India [09/677(0026)/2016 EMR-I]
- National Research Foundation of Korea - Ministry of Science, ICT & Future Planning [2016R1E1A1A01940995]
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This review evaluates the technical readiness level of photoelectrocatalysis (PEC) techniques for wastewater treatment and energy recovery, with a focus on the pulp and paper (P&P) industry. Experimental parameters play a crucial role in the removal of organic pollutants and energy recovery through PEC performance metrics. Additionally, cost analysis, energy consumption, and durability present critical challenges in enhancing PEC technologies.
Among the diverse wastewater treatment routes, photoelectrocatalysis (PEC) developed by hybridization of photocatalyst with electrocatalyst has been demonstrated for a high potential in waste-to-energy applications. Here, we provide a comprehensive review to assess the technical readiness level of PEC techniques for both wastewater treatment and energy recovery, with a particular emphasis on the pulp and paper (P&P) industry. The effects of various experminetal parameters (e.g., electrode materials, reactor types, and experimental conditions) on the removal of organic pollutants from P&P effluents with the simultaneous recovery of energy (e.g., H-2 and H2O2) have been evaluated in relation to the PEC performance metrics (e.g., quantum yield (QY), space-time yield (STY), and figure of merit (FoM) metrics). Critical challenges in the augmentation of PEC are also summarized in terms of cost analysis, energy consumption, and durability. At last, future research prospects of the PEC system under the real-world conditions are discussed.
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