Absorption of dilute nitric monoxide in aqueous solutions of Fe(II)-EDTA and mixed solutions of Fe(II)-EDTA and Na2SO3.

Teramoto, Masaaki; Hiramine, S.; Shimada, Yusuke; Sugimoto, Yoshihiro; Teranishi, Hiroshi

doi:10.1252/jcej.11.450

Cited by 56 publications

(27 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to Incropera et al, 51 water viscosities are tabulated in detail every 5 K. Therefore, the value of water viscosity at a specific temperature can be obtained through interpolation.…”

Section: ■ Calculationsmentioning

confidence: 99%

On the Kinetics of the Absorption of Nitric Oxide into Ammoniacal Cobalt(II) Solutions

Tan²

2014

Environ. Sci. Technol.

View full text Add to dashboard Cite

Experiments were conducted using a custom double-stirred tank reactor to determine the rate constants of reactions between nitric oxide (NO) and both pentaaminecobalt(II) and hexaaminecobalt(II) at temperatures of 298.2 and 303.2 K and pH levels between 8.50 and 9.87 under atmospheric pressure. The NO concentration of simulated flue gas stream ranged from 400 to 1400 ppmv. Ammoniacal cobalt(II) solutions were prepared by adding aqueous ammonia into a cobalt(II) nitrate solution in the presence of concentrated ammonium nitrate. The reaction rate constants were calculated with an enhancement factor for gas absorption associated with parallel chemical reactions. The results showed that the reaction between NO and pentaaminecobalt(II) was first order with respect to both the NO and the pentaamminecobalt(II) ion. Similarly, the reaction between NO and hexaamminecobalt(II) was first order with respect to both the NO and the hexaamminecobalt(II) ion. The forward reaction rate constants of these two reactions were 6.43 × 10(6) and 1.00 × 10(7) L · mol(-1) · s(-1) at 298.2 K, respectively, and increased to 7.57 × 10(6) and 1.12 × 10(7) L · mol(-1) · s(-1) at 303.2 K, respectively. Ammoniacal cobalt(II) solutions also have the potential to simultaneously remove CO2, SO2, and NOx from postcombustion flue gas.

show abstract

Section: ■ Calculationsmentioning

confidence: 99%

On the Kinetics of the Absorption of Nitric Oxide into Ammoniacal Cobalt(II) Solutions

Tan²

2014

Environ. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…(7) and (8). (7) and (9) gives k'LA=k.LJ=kUl+VD^jKJ (V^i+VM (14) This equation is similar to that derived by Olander4).…”

Section: Theorymentioning

confidence: 99%

“…NA=k' LA(Ai-A0)=kLJ(Ai-A0)=kLT(Ti-T0) (8) where /3 is the enhancement factor represented by P^l + VDzlD^Et -EoyiAt -Ao) (9) and T is the sum of the concentrations of A and E.…”

Section: Theorymentioning

confidence: 99%

Effect of dissociation on the absorption rate of dilute SO2.

Teramoto

Kido

Teranishi

1980

J. Chem. Eng. Japan

Self Cite

View full text Add to dashboard Cite

Absorption of dilute SO2 in water, aqueous solutions of H2SO4, NaHSO3and Fe(II)-edta was theoretically and experimentally investigated. It was found that the dissociation of SO2 in solutions (SO2+H2O^HSO+H+) has a remarkable effect on its absorption rate. The presence of H2SO4or NaHSO3prevents the dissociation of SO2, resulting in lower absorption rate than that in pure water. The absorption rate in Fe(II)-edta solution was found to be faster than that into water because of the buffer capacity of Fe(II)-edta solution. The experimental results are satisfactorily explained by the theory of gas absorption accompanied by instantaneous reversible reactions.

show abstract

“…Therefore, it is important to select an aqueous solution with a suitable reactant. Two types of agents are usually used, including a strong oxidizing agent, such as NaClO 2 , KMnO 4 , and H 2 O 2 to oxidize insoluble NO into a more soluble NO 2 , and an agent to form a complex with NO like metal chelate . Among these absorbents, ferrous chelate solution has been demonstrated as a suitable and efficient option in the denitrification process due to its high reaction rate with NO and good regeneration ability .…”

Section: Introductionmentioning

confidence: 99%

Removal of nitric oxide in a microporous tube‐in‐tube microchannel reactor by ferrous chelate solution

et al. 2016

View full text Add to dashboard Cite

NO gas emission has harmfully impacted human health and the environment. Absorption of NO gas into an aqueous solution is considered to be a promising approach for its removal. FeII(EDTA) solution has been demonstrated as an efficient option in the denitrification process. However, its absorption rate is strongly affected by mass transfer limitation of NO into FeII(EDTA) solution in traditional reactors. In this paper, the removal process of NO with FeII(EDTA) solution was studied in a microporous tube‐in‐tube microchannel reactor (MTMCR). The effects of design and operating parameters such as micropore size, annular channel width, liquid flow rate, gas flow rate, gas‐liquid ratio, pH and concentration of absorbent, and absorption temperature on overall volumetric mass transfer coefficient (KLa) and NO removal efficiency were explored. The results indicated that the MTMCR exhibited obvious advantages owing to continuous operation mode and higher NO removal efficiency of over 90 %, as compared to traditional reactors. Both KLa and NO removal efficiency increased with increases of absorbent concentration and liquid flow rate, as well as decreases of absorption temperature, micropore size, and annular channel width. In addition, KLa increased while NO removal efficiency decreased with increasing gas‐liquid ratio and gas flow rate. The obtained results imply a great potential of the MTMCR in the removal of NO from post‐combustion flue gas.

show abstract

Absorption of dilute nitric monoxide in aqueous solutions of Fe(II)-EDTA and mixed solutions of Fe(II)-EDTA and Na2SO3.

Cited by 56 publications

References 1 publication

On the Kinetics of the Absorption of Nitric Oxide into Ammoniacal Cobalt(II) Solutions

On the Kinetics of the Absorption of Nitric Oxide into Ammoniacal Cobalt(II) Solutions

Effect of dissociation on the absorption rate of dilute SO2.

Removal of nitric oxide in a microporous tube‐in‐tube microchannel reactor by ferrous chelate solution

Contact Info

Product

Resources

About