Oxidation of methanol and total reduced sulfur compounds with ozone over V2O5/TiO2 catalyst: Effect of humidity

Sahle‐Demessie, Endalkachew; Devulapelli, Venu Gopal

doi:10.1016/j.apcata.2009.03.035

Cited by 28 publications

(20 citation statements)

References 36 publications

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“…Little catalyst deactivation or change in the product distribution was observed during the reaction time of 5 h in the presence of moisture [15]. The influence of gas hourly space velocity showed that product distribution can be affected with change in the contact time, which suggested that the reaction may be influenced by mass transfer limitations [11][12][13][14][15].…”

Section: Summary Of Bench-scale Studiesmentioning

confidence: 92%

“…The combination of gas phase and surface reactions on the V/TiO 2 catalysts reduced the amount of ozone required for high conversions. In the absence of ozone the catalysts showed very low activity at temperatures lower than 2508C [11][12][13]. The oxidation of DMS (500 ppm) on 10% V 2 O 5 / TiO 2 catalyst gave high conversion to SO 2 .…”

Section: Summary Of Bench-scale Studiesmentioning

confidence: 99%

“…A 981 % conversion with ozone-to-methanol ratio of 1.2 and gas hourly space velocity (GHSV) of 60,000 h 21 was achieved. The main degradation products of methanol were CO and CO 2 with small quantities of methyl formate [11,12]. The combination of gas phase and surface reactions on the V/TiO 2 catalysts reduced the amount of ozone required for high conversions.…”

Section: Summary Of Bench-scale Studiesmentioning

confidence: 99%

“…Specifically, a mobile pilot-scale system was used to oxidize volatile organic and TRS compounds in a slip stream from a high volume, low concentration (HVLC) noncondensable waste gas stream from the pulping area of the mill. Previously, research on ozone-enhanced catalytic oxidation has been conducted in the laboratory, and pollutants [methanol and dimethyl sulfide (DMS)] that are typically present in Kraft pulp mill noncondensable gas streams were successfully oxidized [11][12][13][14][15]. As a follow-on to the bench-scale work, field tests were conducted to assess the reliability and performance of the technology with an actual waste gas stream.…”

Section: Introductionmentioning

confidence: 99%

“…Researchers have attempted to develop technologies to reduce emissions from the pulp and paper industry [10][11][12][13][14][15]. Burgess et al [10] used a V 2 O 5 /TiO 2 catalysts and oxygen at temperatures >3508C to convert the methanol in aqueous waste streams to formaldehyde [10], a product that could subsequently be used in resins.…”

Section: Introductionmentioning

confidence: 99%

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Pilot‐scale study on ozone‐enhanced catalytic oxidation of waste gas emissions from the pulp and paper industry

Sahle‐Demessie

Almquist

Devulapelli

2011

Env Prog and Sustain Energy

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Field studies were conducted at Domtar's Kraft pulp and paper mill (Hawesville, KY) for 2 weeks to investigate the treatment of high volume, low concentration (HVLC) waste gas streams using ozoneenhanced catalytic oxidation technology. The contaminants in the HVLC waste gas from the pulping area of the mill contained mainly methanol (360 6 80 ppm) and total reduced sulfur compounds [dimethyl sulfide (DMS) (4400 6 670 ppm) and dimethyl disulfide (150 6 25 ppm). The catalysts used in the field studies included ViO 2 /TiO 2 and CuO/ MoO 3 /ã-Al 2 O 3 . The results of the field study showed ozone-to-sulfur ratios >2, space velocities <1000 h 21 , and reaction temperatures !2508C are required to achieve >90% destruction of DMS in the HVLC waste gas stream. Ozone-enhanced catalytic oxidation has key environmental advantages over incineration, including mild operating temperatures and thus, lower energy costs and lower NO x formation. Although the technology appeared to be feasible at the laboratory scale, the field study data revealed that several obstacles must be overcome prior to this technology being implemented at large scale. 2010 American Institute of Chemical Engineers Environ Prog, 30: 268-277, 2011*

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Section: Summary Of Bench-scale Studiesmentioning

confidence: 92%

Section: Summary Of Bench-scale Studiesmentioning

confidence: 99%

Section: Summary Of Bench-scale Studiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Pilot‐scale study on ozone‐enhanced catalytic oxidation of waste gas emissions from the pulp and paper industry

Sahle‐Demessie

Almquist

Devulapelli

2011

Env Prog and Sustain Energy

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Vapor phase catalytic degradation studies of diethyl sulfide with MnO/Zeolite‐13X catalysts in presence of air

Ramakrishna¹,

Gopi

Shekar

et al. 2018

Env Prog and Sustain Energy

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Vapor phase catalytic degradation of diethyl sulfide (DES) (simulant of sulfur mustard: a potential chemical warfare agent) at higher concentration (∼1200 ppm) was carried out in a fixed bed flow reactor over MnO/zeolite‐13X catalysts of different manganese contents. The catalytic process was studied in the temperature range of 100–400°C with air as the oxidizing agent. Process parameters such as reaction temperature, metal content, gas hourly space velocity, and RH% were optimized for 100% degradation of DES vapors. Reaction temperature and RH% has significant influence over the activity and stability of MnO/zeolite‐13X catalyst. The major degradation products identified are carbon oxides, ethylene, acetaldehyde, and sulfur dioxide. Traces of diethyl sulfoxide and diethyl sulfone, CSO, ethanol, thioethanol, methane thiol, acetic acid, formic acid, and thiophene are also identified in GC‐MS analyses. The plausible degradation pathway of DES is also proposed based on the analyses results. The MnO/zeolite‐13X catalysts of different compositions are prepared by wet impregnation method and characterized by different characterization techniques. © 2018 American Institute of Chemical Engineers Environ Prog, 37: 1705–1712, 2018

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The adsorption properties of organic sulfur compounds on zeolite-based sorbents impregnated with rare-earth metals

et al. 2013

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Oxidation of methanol and total reduced sulfur compounds with ozone over V2O5/TiO2 catalyst: Effect of humidity

Cited by 28 publications

References 36 publications

Pilot‐scale study on ozone‐enhanced catalytic oxidation of waste gas emissions from the pulp and paper industry

Pilot‐scale study on ozone‐enhanced catalytic oxidation of waste gas emissions from the pulp and paper industry

Vapor phase catalytic degradation studies of diethyl sulfide with MnO/Zeolite‐13X catalysts in presence of air

The adsorption properties of organic sulfur compounds on zeolite-based sorbents impregnated with rare-earth metals

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