Abatement of chlorobenzene by plasma catalysis: Parameters optimization through response surface methodology (RSM), degradation mechanism and PCDD/Fs formation

Yu, Xin; Dang, Xueping; Li, Shijie; Meng, Xiangkang; Hou, Hao; Wang, Pengyong; Wang, Qi

doi:10.1016/j.chemosphere.2022.134274

Cited by 21 publications

(10 citation statements)

References 43 publications

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“…The Cl-substitution in CB leads to its complicated transformation process and production of secondary pollutants, such as dioxins and polychlorinated compounds. 17 MECs with carbon cloth (CC), RVC, and NF as cathodes were established to abate CB, respectively, since the direct comparison of biocathodes with different dimensions and materials in the identical condition remains very rare. 18 The influence of biofilm characteristics on MEC performance in terms of CB elimination capacity and energy utilization efficiency was evaluated.…”

Section: Introductionmentioning

confidence: 99%

“…In this work, chlorobenzene (CB) is selected as the targeted pollutant to be removed by MECs. The Cl-substitution in CB leads to its complicated transformation process and production of secondary pollutants, such as dioxins and polychlorinated compounds . MECs with carbon cloth (CC), RVC, and NF as cathodes were established to abate CB, respectively, since the direct comparison of biocathodes with different dimensions and materials in the identical condition remains very rare .…”

Section: Introductionmentioning

confidence: 99%

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Structural Characteristics and Functional Genes of Biofilms in Microbial Electrolysis Cells for Chlorobenzene Abatement

Ying

Chen

et al. 2023

ACS EST Water

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Chlorobenzene (CB) is typically emitted during industry and waste incineration, posing hazards to the safety of humans and the ecosystem. Successful CB elimination has been achieved in microbial electrolysis cells (MECs), whereas little is known about elimination effectiveness in response to the structural and functional characteristics of biofilms. Herein, the bacterial viability and functional gene abundance of biofilms in MECs with carbon cloth (CC), reticulated vitreous carbon (RVC), and nickel foam (NF) as cathodes are emphasized. Experimental results reveal that bacterial viability on RVC is 62 and 92% higher than that of CC and NF, respectively, achieving 30 and 65% superior CB removal efficiency. Notably, the MEC with RVC outperforms that with the highly conductive NF due to low electron loss, causing a twice as much increase in coulombic efficiency. Metagenomic analysis indicates that the CB degrader (i.e., Pandoraea), electrochemically active bacteria (i.e., Chryseobacterium), and genes responsible for CB metabolism (i.e., todD and clcB) in RVC biofilms increase by over 30%, fourfold, and 10%, respectively, compared to CC and NF. Moreover, CB degradation is found to occur via two possible pathways: (1) thorough elimination by dechlorination, hydrolysis, and oxidation after conversion to 3-chlorocatechol, and (2) conversion into phenol and benzoate for complete degradation.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Structural Characteristics and Functional Genes of Biofilms in Microbial Electrolysis Cells for Chlorobenzene Abatement

Ying

Chen

et al. 2023

ACS EST Water

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“…Consequentially, rigorously identifying optimal conditions requires the development and employment of a nonlinear model of the reaction system in tandem with experiments. In recent years, the response surface methodology (RSM), a statistical technique to learn a surrogate model from carefully designed experiments and the subsequent application of the ensuing model to identify optimal conditions, has gained traction to guide experiments . Examples of RSM in optimizing catalytic systems include DBD plasma DMR, − ammonia synthesis, nitric oxide reduction, and ethanol reforming .…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, the response surface methodology (RSM), a statistical technique to learn a surrogate model from carefully designed experiments and the subsequent application of the ensuing model to identify optimal conditions, has gained traction to guide experiments. 22 Examples of RSM in optimizing catalytic systems include DBD plasma DMR, 23 − 25 ammonia synthesis, 26 nitric oxide reduction, 27 and ethanol reforming. 9 In these applications, a typical optimization is “static”; i.e., the models are trained once and then employed in optimization.…”

Section: Introductionmentioning

confidence: 99%

Actively Learned Optimal Sustainable Operation of Plasma-Catalyzed Methane Bireforming on La_0.7Ce_0.3NiO₃ Perovskite Catalyst

Gonzalez-Casamachin,

Qin,

Huang

et al. 2023

ACS Sustainable Chem. Eng.

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Plasma-catalytic bireforming of methane was studied and actively optimized using a La 0.7 Ce 0.3 NiO 3 perovskite catalyst via experimentation in tandem with response surface modeling. Plasma power, inlet flow rate, temperature, CO 2 /CH 4 ratio, and steam concentration were tuned to maximize a variety of process-and sustainability-based metrics. Analysis of the optimal conditions (with respect to different metrics) with and without the catalyst reveals that dry reforming is driven largely via noncatalytic reactions, while steam reforming and water gas shift reactions require the catalyst. The experimental outcome demonstrated that under optimum reaction conditions using the La 0.7 Ce 0.3 NiO 3 catalyst it is possible to minimize global warming potential (GWP), in terms of inferred CO 2 footprint normalized to hydrogen throughput, resulting in maximizing hydrogen yield through steam reforming (and water gas shift reactions) at an SEI of ≈12 eV/ molecule. Furthermore, the highest CH 4 conversion reached was 87% while the catalyst showed good activity stability in DBD plasma experiments.The actively learned iterative optimization procedure developed in this work allows for a direct juxtaposition of thermal (heat needed to make steam and heat the plasma reactor) and electrical (power requirement for plasma generation) carbon footprints in a highly nonlinear multivariate process. Furthermore, the corresponding GWP was calculated using a conventional electricity mix, wind electricity, and solar electricity, allowing a direct sustainability assessment in catalyst-assisted plasma conversion of carbonaceous feedstock to H 2 and CO.

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“…Non-thermal plasma (NTP) is a powerful technology for VOC degradation of low concentrations [3]. Many studies reported that the combination of NTP and catalysis can improve the efficiency of VOC degradation and reduce the formation of by-products [4]. Xu et al developed a Camodified Ni/ZSM-5 catalyst for toluene oxidation using a plasma catalytic system [5].…”

Section: Introductionmentioning

confidence: 99%

Investigation of cyclohexane catalytic degradation driven by N atoms from N₂ discharges

Li¹,

Xu²,

Yao³

et al. 2023

Plasma Sci. Technol.

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The effect of N2 discharge products on cyclohexane degradation over MnO2/γ-Al2O3 catalyst has been evaluated by feeding N2 discharge products to the catalyst using a specially designed dielectric barrier discharge reactor. At reaction temperature of 100 o°C, the cyclohexane conversion increased from 2.46% (without N2 discharge products) to 26.3% (with N2 discharge products). N and O-containing by-product (3, 4-dehydroproline) was found on the catalyst surface using gas chromatograph-mass spectrometry identification, in which C=N-–C and C=N-–H bonds were also confirmed from X-ray photoelectron spectroscopy analysis results. Operando analysis results using diffuse reflectance infrared Fourier transform spectroscopy revealed that N atoms can react with surface H2O possibly to NH and OH reactive species, those species which have reactivities to promote CO oxidation to CO2. Mechanism of N-atom driven cyclohexane degradation to CO and CO2 is proposed.

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Abatement of chlorobenzene by plasma catalysis: Parameters optimization through response surface methodology (RSM), degradation mechanism and PCDD/Fs formation

Cited by 21 publications

References 43 publications

Structural Characteristics and Functional Genes of Biofilms in Microbial Electrolysis Cells for Chlorobenzene Abatement

Structural Characteristics and Functional Genes of Biofilms in Microbial Electrolysis Cells for Chlorobenzene Abatement

Actively Learned Optimal Sustainable Operation of Plasma-Catalyzed Methane Bireforming on La_0.7Ce_0.3NiO₃ Perovskite Catalyst

Investigation of cyclohexane catalytic degradation driven by N atoms from N₂ discharges

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Abatement of chlorobenzene by plasma catalysis: Parameters optimization through response surface methodology (RSM), degradation mechanism and PCDD/Fs formation

Cited by 21 publications

References 43 publications

Structural Characteristics and Functional Genes of Biofilms in Microbial Electrolysis Cells for Chlorobenzene Abatement

Structural Characteristics and Functional Genes of Biofilms in Microbial Electrolysis Cells for Chlorobenzene Abatement

Actively Learned Optimal Sustainable Operation of Plasma-Catalyzed Methane Bireforming on La0.7Ce0.3NiO3 Perovskite Catalyst

Investigation of cyclohexane catalytic degradation driven by N atoms from N2 discharges

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Product

Resources

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Actively Learned Optimal Sustainable Operation of Plasma-Catalyzed Methane Bireforming on La_0.7Ce_0.3NiO₃ Perovskite Catalyst

Investigation of cyclohexane catalytic degradation driven by N atoms from N₂ discharges