VOC removal and odor abatement by a low-cost plasma enhanced biotrickling filter process

Dobslaw, Daniel; Schulz, Andreas; Helbich, Steffen; Dobslaw, Christine; Engesser, Karl‐Heinrich

doi:10.1016/j.jece.2017.10.015

Cited by 64 publications

(41 citation statements)

References 73 publications

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“…[ 188 ] However, until now, there are few reports on the synergistic control of pollutants by plasma technology and biological treatment technology. [ 49 ]…”

Section: Degradation Of Vocs By Plasma‐assisted Biotreatmentmentioning

confidence: 99%

“…In the meantime, plasma degradation products were detected that are more soluble in water than the initial VOCs. Dobslaw et al [ 49 ] found that hydrophilic intermediates were produced when plasma degraded lipophilic compounds, which could enhance the biodegradability of lipophilic compounds. For example, plasma can degrade styrene into benzaldehyde with better water solubility, and the degradation efficiency of the entire system reached 94.3–97.2% even at low input energy.…”

Section: Degradation Of Vocs By Plasma‐assisted Biotreatmentmentioning

confidence: 99%

“…Catalytic combustion requires a large amount of heat energy and involves a high cost of construction and operation. [ 47,49 ] The pore blockage of the adsorbent and the low regeneration rate still need to be further solved. [ 50,51 ] Biological treatment of VOCs with poor biodegradability and poor water solubility have poor biological treatment effects, and it is easy to cause packing compaction due to microbe enrichment.…”

Section: Introductionmentioning

confidence: 99%

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Progress in degradation of volatile organic compounds based on low‐temperature plasma technology

Chang

Wang

Zhang

2020

Plasma Processes & Polymers

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On the basis of plasma technology, the progress of the volatile organic compounds' (VOCs') degradation by low‐temperature plasma alone is discussed first, including reactor types, influencing factors of plasma degradation of VOCs and the reaction mechanism between plasma and VOCs. Then, the research status of three VOC degradation technologies (catalysis, adsorption, and biotechnology) and their synergistic degradation of VOCs with plasma are reviewed, including the effect of catalyst position on VOC degradation, the interaction mechanism between plasma and catalyst; the factors affecting the adsorption of VOCs by carbon‐based adsorbents and zeolite, the degradation of VOCs by plasma‐assisted adsorbent; the features of different biological systems, the influencing factors of VOC degradation by the biotrickling system, and the degradation of VOCs by plasma‐assisted biotreatment. Finally, the prospects of developments in high‐tech based on plasma are discussed.

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“…[ 188 ] However, until now, there are few reports on the synergistic control of pollutants by plasma technology and biological treatment technology. [ 49 ]…”

Section: Degradation Of Vocs By Plasma‐assisted Biotreatmentmentioning

confidence: 99%

Section: Degradation Of Vocs By Plasma‐assisted Biotreatmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Progress in degradation of volatile organic compounds based on low‐temperature plasma technology

Chang

Wang

Zhang

2020

Plasma Processes & Polymers

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“…Plasma and plasma catalysis with dielectric barrier discharge (DBD) reactors have been widely utilized for a large variety of chemical processes, including the reforming of hydrocarbons [1][2][3], the abatement of contaminants [4][5][6], or the synthesis of ammonia [7][8][9]. There are two major shortcomings when dealing with DBD plasma reactions.…”

Section: Introductionmentioning

confidence: 99%

Isotope Labelling for Reaction Mechanism Analysis in DBD Plasma Processes

et al. 2019

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Dielectric barrier discharge (DBD) plasmas and plasma catalysis are becoming an alternative procedure to activate various gas phase reactions. A low-temperature and normal operating pressure are the main advantages of these processes, but a limited energy efficiency and little selectivity control hinder their practical implementation. In this work, we propose the use of isotope labelling to retrieve information about the intermediate reactions that may intervene during the DBD processes contributing to a decrease in their energy efficiency. The results are shown for the wet reforming reaction of methane, using D2O instead of H2O as reactant, and for the ammonia synthesis, using NH3/D2/N2 mixtures. In the two cases, it was found that a significant amount of outlet gas molecules, either reactants or products, have deuterium in their structure (e.g., HD for hydrogen, CDxHy for methane, or NDxHy for ammonia). From the analysis of the evolution of the labelled molecules as a function of power, useful information has been obtained about the exchange events of H by D atoms (or vice versa) between the plasma intermediate species. An evaluation of the number of these events revealed a significant progression with the plasma power, a tendency that is recognized to be detrimental for the energy efficiency of reactant to product transformation. The labelling technique is proposed as a useful approach for the analysis of plasma reaction mechanisms.

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“…Plasma catalysis is receiving more and more attention in the last few years, since the specific interactions between plasma and catalyst surface may lead to synergistic effects [1][2][3][4]. One of the earliest plasma catalytic applications is the abatement of volatile organic compounds (VOC) [5,6], while in the last decade research has been focused more on CO 2 conversion [7][8][9], conversion of hydrocarbons via reforming, and coupling [10][11][12], as well as activation of N 2 [13,14]. Reforming of hydrocarbons is an example of an endothermic reaction, where plasma catalysis holds promise because of activation of hydrocarbons at low temperature, but also because electrical energy would be used to generate the required heat.…”

Section: Introductionmentioning

confidence: 99%

Plasma Catalysis: Distinguishing between Thermal and Chemical Effects

2019

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The goal of this study is to develop a method to distinguish between plasma chemistry and thermal effects in a Dielectric Barrier Discharge nonequilibrium plasma containing a packed bed of porous particles. Decomposition of CaCO3 in Ar plasma is used as a model reaction and CaCO3 samples were prepared with different external surface area, via the particle size, as well as with different internal surface area, via pore morphology. Also, the effect of the CO2 in gas phase on the formation of products during plasma enhanced decomposition is measured. The internal surface area is not exposed to plasma and relates to thermal effect only, whereas both plasma and thermal effects occur at the external surface area. Decomposition rates were in our case found to be influenced by internal surface changes only and thermal decomposition is concluded to dominate. This is further supported by the slow response in the CO2 concentration at a timescale of typically 1 minute upon changes in discharge power. The thermal effect is estimated based on the kinetics of the CaCO3 decomposition, resulting in a temperature increase within 80 °C for plasma power from 0 to 6 W. In contrast, CO2 dissociation to CO and O2 is controlled by plasma chemistry as this reaction is thermodynamically impossible without plasma, in agreement with fast response within a few seconds of the CO concentration when changing plasma power. CO forms exclusively via consecutive dissociation of CO2 in the gas phase and not directly from CaCO3. In ongoing work, this methodology is used to distinguish between thermal effects and plasma–chemical effects in more reactive plasma, containing, e.g., H2.

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VOC removal and odor abatement by a low-cost plasma enhanced biotrickling filter process

Cited by 64 publications

References 73 publications

Progress in degradation of volatile organic compounds based on low‐temperature plasma technology

Progress in degradation of volatile organic compounds based on low‐temperature plasma technology

Isotope Labelling for Reaction Mechanism Analysis in DBD Plasma Processes

Plasma Catalysis: Distinguishing between Thermal and Chemical Effects

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