Kinetic modeling of benzene and toluene decomposition in air and in flue gas under electron beam irradiation

Nichipor, H.; Dashouk, E.M.; Yacko, S.; Sun, Yongxia; Chmielewski, A.G.; Zimek, Z.; Bułka, Sylwester

doi:10.1016/j.radphyschem.2012.01.006

Cited by 10 publications

(4 citation statements)

References 40 publications

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“…5) and then this activated molecule can react with O 2 and NO 2 to from other products (Semadeni, 1994 in presence of hydroxyl radicals, abstraction of hydrogen atoms will lead to production of some intermediates such as benzaldehyde, benzoic acid and benzyl alcohol. However, the previous researches have reported lower reaction rate constant (k) of hydrogen abstraction reactions than OH addition ones (Nichipor et al, 2012). The similar studies have showed that many other intermediates such as cresol, 4-methyl-2-propyl furan and formic acid may be produced, also some nitro aromatics like 4-nitrophenol may be produced by reaction of the intermediates and nitrogen (Van Durme et al, 2007).…”

Section: Results and Discussion Elimination Of The Btxsmentioning

confidence: 95%

“…Technol., 8 (4): 149-161, 2015 Fig. 5: Some reaction pathways of the BTXs and hydroxyl free radical (Albarran and Munguia, 2014;Benzinger, 2010;Golding et al, 2010;Hu et al, 2011;Huang et al, 2011;Nichipor et al, 2012;Qian et al, 2013;Volkamer et al, 2002;Zhao et al, 2005) hence, about toluene and m and p-xylenes two scenarios can be raised. One is toluene higher degradation on the surface of metallic nanoparticles and other is its more reaction potential with non-surface free radicals than m and p-xylenes which according to the reported higher reaction rate constant of m and p-xylenes with C OH (k = 23.4×10 12 and k = 23.4×10 12 ) (Martinez et al, 2014), the first scenario sound to be more probable.…”

Section: Results and Discussion Elimination Of The Btxsmentioning

confidence: 99%

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BTXs Removal with Transition Metals Coated Beds, Considering the Plausible Reaction Mechanisms

Rostami¹,

Jafari²

2015

J. of Environmental Science and Technology

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In this study, a natural zeolite (i.e., Clinoptilolite) was used as bed of a lab scale packed tower. The bed was coated with two transition metals nano-scale particles (i.e., Fe 0 and Cu 2 O). Each coated metal to bed ratio was 4.6 wt.% and the experiments were conducted in air flow of 1 L minG 1 and temperature of 200°C. The results showed up to 83.83% of BTX (benzene, toluene and xylene) removal for Fe 0 and respectively 32.0 and 56.98% for Cu 2 O and combined Fe 0 -Cu 2 O coated beds. However, the pollutants mineralization/elimination ratio on the combined metals coated bed, with up to 0.83, was greater than the remains which were 0.58 and 0.37 in order for Fe 0 and Cu 2 O coated beds.

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Section: Results and Discussion Elimination Of The Btxsmentioning

confidence: 95%

Section: Results and Discussion Elimination Of The Btxsmentioning

confidence: 99%

BTXs Removal with Transition Metals Coated Beds, Considering the Plausible Reaction Mechanisms

Rostami¹,

Jafari²

2015

J. of Environmental Science and Technology

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“…5.11 eV) are of the same order of magnitude of non-equilibrium electronic collisions [53]. Decomposition of benzene could rapidly occur in the presence of free radicals by breaking the benzene ring, as the radicals attack to double bands, by adding OH groups and abstraction of H atoms [54]. The FTIR analysis for benzene treatment in nitrogen and air carrier gases showed notable reduction of benzene ring (1450 cm −1 ) and C-H bands in air rather than nitrogen (figure 6(c)), which could be related to the role of free radicals.…”

Section: ( ) mentioning

confidence: 95%

Enhanced removal of benzene in non-thermal plasma with ozonation, flow recycling, and flow recirculation

Rostami¹,

Moussavi²,

Darbari³

et al. 2019

Plasma Sci. Technol.

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A double stage AC/DC sequential high voltage reactor has been developed to study the decomposition of benzene in the air stream at atmospheric pressure. The removal efficiency was measured as a function of ozonation, flow recycling, and flow recirculation. Ozonation in the inlet, and recycling of the exhaust stream increased the removal of benzene, also with increasing of specific input energy (J l −1 ) the effect of inlet flow ozonation on benzene decomposition was enhanced. The highest removal efficiency was obtained up to >99% in recirculation six times, while CO 2 selectivity reached 99.9% and energy efficiency was 0.59 g kWh −1 . O 3 production/ decomposition > production of OH radicals > electronic and ionic collisions were indicated as the main mechanisms influencing benzene abatement in this research.

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“…4. In recent researches on the decomposition mechanism of VOCs, the kinetic modeling of benzene decomposition was describedbyNichiporetal., [26].Theactivespeciesformedin the simulated model gas (87%N 2 + 10%O 2 + 3% H 2 O + NOx + SO 2 + VOC) can be listed as primary ions (such as N 2 +, O 2 +, N+, O+, H 2 O+, OH+, H+, H 2 +) and radicals (such as O • , N • , • OH, HO • 2 ). Kinetic and mechanism of transformation of these species in absence of VOCs were wellrecognized by Busi F et al, and Mätzing H et al, [27,28].…”

Section: Benzen Conversion By Pgamentioning

confidence: 99%

Decomposition of high concentration benzene (produced in paper and painting industries) and its byproducts, methane and carbon dioxide, using plate gliding arc

Rad

Khani

Mehdikia

et al. 2019

J Environ Health Sci Engineer

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High concentration benzene production in paper and painting industries is a restrictive problem in production line of companies. In this study, removal of high concentrated benzene produced in painting companies was investigated using a Plate Gliding Arc (PGA) reactor. Decomposition of methane and carbon dioxide as the most predominate byproducts of benzene decomposition was also studied using (PGA) reactor. The effect of several parameters such as input power, feed gas flow rate, type of carrier gas, and [CH 4 /CO 2 ] flow ratio was studied by two series of experiments. The results show significant conversion (>70%) of high concentration benzene (74000ppm) without using any catalyst. Selectivity of CO 2 and CO was 88% and 10% respectively showing complete oxidation of benzene. The maximum conversion of CH 4 and CO 2 reached 52% and 69%, respectively by using optimum ratio of 3:4. The main results of this study proved removal of high concentration benzene using a low-energydensity reactor. Furthermore, an optimum value for efficient conversion of methane and carbon dioxide was achieved and the energy density of the PGA reactor was evaluated, which shows a good promise for industrial applications.Keywords Volatile organic compounds . Greenhouse gases . Plate gliding arc plasma . High concentrated benzene removal . Methane and carbon dioxide decomposition * Babak Shokri

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Kinetic modeling of benzene and toluene decomposition in air and in flue gas under electron beam irradiation

Cited by 10 publications

References 40 publications

BTXs Removal with Transition Metals Coated Beds, Considering the Plausible Reaction Mechanisms

BTXs Removal with Transition Metals Coated Beds, Considering the Plausible Reaction Mechanisms

Enhanced removal of benzene in non-thermal plasma with ozonation, flow recycling, and flow recirculation

Decomposition of high concentration benzene (produced in paper and painting industries) and its byproducts, methane and carbon dioxide, using plate gliding arc

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