Abatement of Toluene Using a Sequential Adsorption-Catalytic Oxidation Process: Comparative Study of Potential Adsorbent/Catalytic Materials

Sonar, Shilpa; Giraudon, Jean‐Marc; Veerapandian, Savita Kaliya Perumal; Bitar, Rim; Leus, Karen; Voort, Pascal Van Der; Lamonier, Jean‐François; Morent, Rino; Löfberg, Axel

doi:10.3390/catal10070761

Cited by 10 publications

(18 citation statements)

References 45 publications

(54 reference statements)

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“…The increasing amount of adsorbed toluene has been claimed to have negative effects on both the desorption of unconverted toluene and the efficiency of the oxidation process. Some carbon deposits on the inner walls of the plasma reactor and/or adsorbed species remaining on the packed bed material after the in-situ NTP treatment can account for the small carbon deficiency observed in this study, as was already previously reported in literature [24,28] in line with the absence of other gaseous organic species in the outlet of the reactor (observed by FT-IR).…”

Section: Effect Of Toluene Exposure Time On Apc Process Performancessupporting

confidence: 88%

“…The transient productions reach the first maximum (shoulder) value between 1 and 3 min of plasma exposure and the second maximum value between 7 and 9 min of plasma exposure and return to baseline beyond 20 min of plasma treatment. This type of behavior has been previously observed over Hopcalite whether it is by thermal desorption [24] or NTP exposure [23]. Most of the CO 2 produced in the first minutes of NTP exposure is released in the gas phase and some surface sites are thus liberated.…”

Section: Effect Of Toluene Exposure Time On Apc Process Performancessupporting

confidence: 70%

“…As shown by the XPS data, Cu + -Cu 2+ and Mn 3+ -Mn 4+ redox couples are mostly responsible for the catalytic properties of the material. The H2-TPR profiles of the fresh Hopcalite and the Hopcalite after reaction (thus after 15 NTP exposures) shown in Figure 8 are complex [24] and quite similar except for the absence of the reduction peak at 149 °C for the Hopcalite after reaction. The absence of the peak at 149 °C for Hopcalite after reaction may be due to the reduction of CuOx into Cu (0) [31].…”

Section: Characterization Of Catalystmentioning

confidence: 91%

“…To overcome this issue, it is necessary to assess the useful adsorption capacity, i.e., the adsorption of toluene taking place until a given threshold concentration (tolerable in the outlet stream) is attained. In our previous study, this approach has also been followed, but in that case two other techniques were combined (adsorption and a thermal oxidation process) [24]. Within the context of an APC process, Liu et al [25] followed the above mentioned strategy for the removal of benzene over AgMn/HZSM-5.…”

Section: Introductionmentioning

confidence: 99%

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Adsorption Followed by Plasma Assisted Catalytic Conversion of Toluene into CO2 on Hopcalite in an Air Stream

Sonar

Giraudon²,

Veerapandian

et al. 2021

Catalysts

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The abatement of toluene was studied in a sequential adsorption-plasma catalysis (APC) process. Within this process, Hopcalite was used as bifunctional material: as adsorbent (storage stage) and as catalyst via the oxidation of adsorbed toluene (discharge stage). It was observed that the desorption and oxidation activity of the adsorbed toluene was significantly affected the process variables. In addition, the adsorption time influenced the CO2 selectivity and CO2 yield by changing the interaction between the catalyst and the plasma generated species. At least four APC sequences were performed for each examined condition suggesting that Hopcalite is very stable under plasma exposure during all the sequences. Consequently, these results could contribute to advance the plasma–catalyst system with an optimal VOC oxidation efficiency. The catalytic activity, amount of toluene adsorbed, amount of toluene desorbed and product formation have been quantified by FT-IR. Moreover, the catalyst was characterized by XRD, H2-TPR, N2 adsorption–desorption analysis and XPS. Hopcalite shows a good CO2 selectivity and CO2 yield when the APC process is performed with an adsorption time of 20 min and a plasma treatment with a discharge power of 46 W which leads to a low energy cost of 11.6 kWh·m−3 and energy yields of toluene and CO2 of 0.18 (±0.01) g·kWh−1 and 0.48 (±0.06) g·kWh−1 respectively.

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Section: Effect Of Toluene Exposure Time On Apc Process Performancessupporting

confidence: 88%

Section: Effect Of Toluene Exposure Time On Apc Process Performancessupporting

confidence: 70%

Section: Characterization Of Catalystmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Adsorption Followed by Plasma Assisted Catalytic Conversion of Toluene into CO2 on Hopcalite in an Air Stream

Sonar

Giraudon²,

Veerapandian

et al. 2021

Catalysts

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“…Although these reactor configurations have been proven to be successfully operated, clearly, they give no room for process integration between endothermic desorption and exothermic oxidation and thus can be cost intensive. The third configuration is the one-bed–one-column reactor. − In this configuration, adsorption and desorption/catalysis occur sequentially in the same bed. This has the advantages of process integration and thus can be energy and cost efficient.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Combined Capture–Destruction of Toluene over Pd/MIL-101 and TiO₂/MIL-101 Dual Function Materials

et al. 2021

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Combined capture−destruction strategies offer a sustainable approach to abate volatile organic compounds (VOCs) in a cost-effective manner. In this work, we investigated the potential of metal/MOF and metal oxide/MOF as dual function materials for use in a combined capture−destruction process to abate toluene emissions. Specifically, to enhance the catalytic activity of the MOF, 18 wt % TiO 2 and 0.7 wt % Pd were loaded onto the surface of MIL-101(Cr) and were investigated for their toluene capture and oxidation potential. As a means of achieving complete destruction, a desorption process was facilitated with simultaneous oxidation. The sequential adsorption-oxidation tests revealed that although the capture capacity decreases upon the addition of TiO 2 and Pd to the MOF, its catalytic activity increases substantially. At low concentrations of toluene, for example, the 500 ppm v used in this study, bare MIL-101(Cr) exhibited the highest equilibrium uptake at 5.6 mmol/g at 25 °C, whereas Pd/MIL-101(Cr) and TiO 2 /MIL-101(Cr) exhibited only 3.6 and 1.2 mmol/g uptake capacity, respectively, under the same conditions. On the contrary, Pd/MIL-101(Cr) outperformed the other materials by displaying a TOF value of 1.32 mmol C7H8 /mol AS /s, which was 10% and 15% higher than those of TiO 2 /MIL-101(Cr) and MIL-101(Cr), respectively. Overall, the obtained results highlight the efficacy of metal/metal oxide-MOF composites as dual function materials for the efficient capture and destruction of VOCs from ultradilute streams.

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Metal–organic framework‐supported hydroxyapatite (UiO‐66@HAp): an efficient catalyst for the microwave‐assisted transesterification of palm oil

Kalita,

Bharali,

Chetia

et al. 2024

Biofuels Bioprod Bioref

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Biodiesel has recently emerged as a renewable and environmentally benign fuel substitute for fossil‐derived energy sources. The use of heterogeneous solid catalysts for the generation of biodiesel from biomass‐derived fats and oils is sustainable. Among various reported catalyst supports, metal–organic frameworks (MOFs) have been popular choices for enhancing catalytic activity for biodiesel synthesis because of several outstanding features including porosity, high surface area, adjustable structures, and uniform pore sizes. In this research, the authors synthesized a novel nanocomposite of MOF‐supported hydroxyapatite (UiO‐66@HAp) using a facile impregnation technique and the characterization of the as‐synthesized catalyst was performed by different spectroscopic methods including powder X‐ray diffraction (PXRD), Fourier transform infrared (FTIR), X‐ray photoelectron spectroscopy (XPS), field emission gun‐scanning electron microscope (FEG‐SEM), energy dispersive X‐ray spectroscopy (EDS), high resolution transmission electron microscopy (HR‐TEM), thermogravimetric analysis (TGA), and N2 adsorption–desorption techniques. After successful synthesis, the catalytic property of the prepared material was evaluated in the palm oil transesterification into biodiesel. Product formation was confirmed by the 1H nuclear magnetic resonance (NMR) spectroscopy, 13C NMR, FTIR, and gas chromatography–mass spectrometry (GC–MS) of the biodiesel. The influence of different reaction variables such as catalyst dosage, methanol/oil molar ratio, temperature of the reaction, and reaction time was also studied. The outcomes revealed that the maximum biodiesel yield (∼97%) was obtained when 6 wt% catalyst was used with a 6:1 ratio of methanol/oil at 70 °C for 1 h. It was also observed that, even after 5 cycles of reuse, the catalyst was capable of producing significant amounts of biodiesel (over 90%). The results suggest that the synthesized novel catalyst holds a promising future in the sustainable production of biodiesel.

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Abatement of Toluene Using a Sequential Adsorption-Catalytic Oxidation Process: Comparative Study of Potential Adsorbent/Catalytic Materials

Cited by 10 publications

References 45 publications

Adsorption Followed by Plasma Assisted Catalytic Conversion of Toluene into CO2 on Hopcalite in an Air Stream

Adsorption Followed by Plasma Assisted Catalytic Conversion of Toluene into CO2 on Hopcalite in an Air Stream

Investigation of Combined Capture–Destruction of Toluene over Pd/MIL-101 and TiO₂/MIL-101 Dual Function Materials

Metal–organic framework‐supported hydroxyapatite (UiO‐66@HAp): an efficient catalyst for the microwave‐assisted transesterification of palm oil

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Abatement of Toluene Using a Sequential Adsorption-Catalytic Oxidation Process: Comparative Study of Potential Adsorbent/Catalytic Materials

Cited by 10 publications

References 45 publications

Adsorption Followed by Plasma Assisted Catalytic Conversion of Toluene into CO2 on Hopcalite in an Air Stream

Adsorption Followed by Plasma Assisted Catalytic Conversion of Toluene into CO2 on Hopcalite in an Air Stream

Investigation of Combined Capture–Destruction of Toluene over Pd/MIL-101 and TiO2/MIL-101 Dual Function Materials

Metal–organic framework‐supported hydroxyapatite (UiO‐66@HAp): an efficient catalyst for the microwave‐assisted transesterification of palm oil

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Product

Resources

About

Investigation of Combined Capture–Destruction of Toluene over Pd/MIL-101 and TiO₂/MIL-101 Dual Function Materials