Absorption of no in aqueous mixed solutions of NaClO2 and NaOH

Sada, Eizô; Kumazawa, H.; Kudo, Ichibei; Kondo, Takashi

doi:10.1016/0009-2509(78)80088-8

Cited by 73 publications

(49 citation statements)

References 7 publications

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“…5, where the slope is found to be 1.5, and the reaction order is determined to be m = 2. A similar observation was reported for NaClO 2 /NaOH solutions by Brogren et al [16], Chu et al [17], and Sada et al [23,26]. The average rate constant is 5.76 · 10 7 (m 3 /mol) 2 /s in the case of C Na 2 CO 3 20 mol m -3 .…”

Section: Effect Of Gas-liquid Interfacial No Concentration On No Absosupporting

confidence: 76%

“…In comparison with NaClO 2 /NaOH solutions, NaClO 2 /Na 2 CO 3 solutions have a lower pH value at the same absorbent concentration. The NO absorption rate increases as the initial pH value decreases for the NaClO 2 solution [6,16,25,26]. Thus, NaClO 2 / Na 2 CO 3 solutions have a higher NO absorption rate.…”

Section: Liquid-side and Gas-side Mass Transfer Coefficientsmentioning

confidence: 89%

“…4 that the NO absorption rate increases with increasing NaClO 2 concentration. The absorption rate of NO by NaClO 2 is regarded as being the m-th order relative to NO [6,16,20,23,26], which was expressed by Danckwerts [27] as given by Eq. (8):…”

Section: Effect Of Naclo 2 Concentration On Nomentioning

confidence: 99%

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Absorption of NO in Aqueous NaClO₂/Na₂CO₃ Solutions

Jiang

Cai

et al. 2008

Chem Eng & Technol

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The absorption rates of NO into aqueous solutions of NaClO 2 blended with Na 2 CO 3 were investigated in a stirred reactor. The experimental results showed that the reaction rate could be expressed as N NO 0:for a second-order reaction rate constant between NO and NaClO 2 , k mn = 5.79 · 10 15 exp(-5557.26/T), was obtained. The addition of Na 2 CO 3 into the solution of NaClO 2 decreased the reaction rate constant. The optimal absorption conditions involved a NO concentration of 540 ppm, NaClO 2 concentration of 50 mol m -3 , Na 2 CO 3 concentration of 10 mol m -3, temperature of 333 K and O 2 concentration of 4 %, which were determined by an orthogonal experiment. Under these optimal conditions, it was possible for the absorption rate to reach up to 1.9271 · 10 -5 mol/(s m 2 ).

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Section: Effect Of Gas-liquid Interfacial No Concentration On No Absosupporting

confidence: 76%

Section: Liquid-side and Gas-side Mass Transfer Coefficientsmentioning

confidence: 89%

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Absorption of NO in Aqueous NaClO₂/Na₂CO₃ Solutions

Jiang

Cai

et al. 2008

Chem Eng & Technol

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“…This is because it reduces the available carbon for product formation, as CO is used instead of H 2 in the production of electrons. Nitric oxide has been found in synthesis gas from switchgrass biomass at 150 ppm, and thus requires clean-up [233]; nitric oxide can be scavenged using sodium hypochlorite, potassium permanganate or sodium hydroxide [235][236][237].…”

Section: Gasification and Gas Clean-upmentioning

confidence: 99%

Commercial Biomass Syngas Fermentation

2012

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Abstract:The use of gas fermentation for the production of low carbon biofuels such as ethanol or butanol from lignocellulosic biomass is an area currently undergoing intensive research and development, with the first commercial units expected to commence operation in the near future. In this process, biomass is first converted into carbon monoxide (CO) and hydrogen (H 2 )-rich synthesis gas (syngas) via gasification, and subsequently fermented to hydrocarbons by acetogenic bacteria. Several studies have been performed over the last few years to optimise both biomass gasification and syngas fermentation with significant progress being reported in both areas. While challenges associated with the scale-up and operation of this novel process remain, this strategy offers numerous advantages compared with established fermentation and purely thermochemical approaches to biofuel production in terms of feedstock flexibility and production cost. In recent times, metabolic engineering and synthetic biology techniques have been applied to gas fermenting organisms, paving the way for gases to be used as the feedstock for the commercial production of increasingly energy dense fuels and more valuable chemicals.

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“…The absorption of NO x in a solution of sodium chlorite was studied in the late seventies by Sada et al [5,6] They measured the absorption rate of NO and NO 2 using a stirred vessel with a plane interface. The overall reaction between NO and ClO 2 ± was considered to be:…”

Section: Introductionmentioning

confidence: 99%

Absorption of NO in an Aqueous Solution of NaClO2

Brogren¹,

Karlsson

Bjerle

1998

Chem. Eng. Technol.

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A packed column has been used to study the absorption of nitrogen oxide in an alkaline solution of sodium chlorite. The reactions taking place during the absorption have been examined and a lumped reaction model has been used to estimate rate constants from experimental data. Several parallel and consecutive reactions were found to take place during the absorption. NO was found to be oxidized to NO 2 and/or to NO 2 ± , and ClO 2 ± was reduced to Cl ± and/or to ClO ± . The pH value of the absorbing liquid was found to have a great impact both on the absorption rate and on the extent of the different redox reactions within the liquid. Experimental results indicate that sodium chlorite mainly works as an agent to oxidize NO to NO 2 and that the major part of the nitrogen oxides are absorbed via the hydrolysis of N 2 O 3 and N 2 O 4 .

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Absorption of no in aqueous mixed solutions of NaClO2 and NaOH

Cited by 73 publications

References 7 publications

Absorption of NO in Aqueous NaClO₂/Na₂CO₃ Solutions

Absorption of NO in Aqueous NaClO₂/Na₂CO₃ Solutions

Commercial Biomass Syngas Fermentation

Absorption of NO in an Aqueous Solution of NaClO2

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Absorption of no in aqueous mixed solutions of NaClO2 and NaOH

Cited by 73 publications

References 7 publications

Absorption of NO in Aqueous NaClO2/Na2CO3 Solutions

Absorption of NO in Aqueous NaClO2/Na2CO3 Solutions

Commercial Biomass Syngas Fermentation

Absorption of NO in an Aqueous Solution of NaClO2

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Absorption of NO in Aqueous NaClO₂/Na₂CO₃ Solutions

Absorption of NO in Aqueous NaClO₂/Na₂CO₃ Solutions