Thermal quenching effects on plasma synthesis of NO and plasma decomposition of CO2

Sekiguchi, Hidetoshi; Kanzawa, Atsushi; Honda, T.

doi:10.1007/bf01054285

Cited by 15 publications

(4 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The resulting gases have been cooled below dissociation temperature (<1000 • C) by expanding it from 30:1 to 200:1 and contacting with recycled cooled gas, to achieved approximately double NO concentration than the equilibrium concentration [66]. Sekiguchi et al [79] studied the effect of thermal quenching on the plasma synthesis of nitric oxide using argon plasma and cooling tubes with different diameters. The conversion to nitric oxide increased with decreasing quenching tube diameter, i.e.…”

Section: Heat Transfer Improvementmentioning

confidence: 99%

Plasma N2-fixation: 1900–2014

et al. 2015

View full text Add to dashboard Cite

Section: Heat Transfer Improvementmentioning

confidence: 99%

Plasma N2-fixation: 1900–2014

et al. 2015

View full text Add to dashboard Cite

“…According to Fridman, quenching is the only process able to protect against the reverse reaction from a fast nonadiabatic cooling system. The thermal quenching can be conducted using a cold wall (water-cooled tube), a fluidized bed, a gas mixing, or a liquid spray . Huczko and Szymafiski have studied the thermal decomposition of CO 2 and have investigated the effect of the quenching rate up to 4 × 10 6 K/s.…”

Section: Plasma Co2 Dissociation As An Alternative Technologymentioning

confidence: 99%

“…The thermal quenching can be conducted using a cold wall (water-cooled tube), a fluidized bed, a gas mixing, or a liquid spray. 51 Huczko and Szymafiski 52 have studied the thermal decomposition of CO 2 and have investigated the effect of the quenching rate up to 4 × 10 6 K/s. They have concluded that a cooling rate of 10 7 K/s is necessary to prevent the oxidation of CO back to CO 2 .…”

Section: Plasma Co 2 Dissociation As An Alternativementioning

confidence: 99%

Assessment of Carbon Dioxide Dissociation as a New Route for Syngas Production: A Comparative Review and Potential of Plasma-Based Technologies

et al. 2013

View full text Add to dashboard Cite

International audienceCoal gasification and natural gas reforming are regarded as mature technologies for syngas production. These technologies are however highly polluting in terms of greenhouse gas emissions; mainly carbon dioxide. Natural gas reforming is considered cleaner than coal gasification but has some disadvantages in terms of plant maintenance and processing costs as they utilize catalysts which are prone to poisoning; are costly; and require regular regeneration. In mitigation of these issues, plasma-based CO2 dissociation technologies could probably offer a new alternative for syngas production. The plasma-based technologies are more compact, have faster response and reaction time, and are relatively cheaper compared to conventional gasification and reforming. Assuming that electricity is produced by a low carbon emitting (renewable or nuclear) power plant, a comparative review of CO2 dissociation technology for syngas production shows that CO2 dissociation can be competitive from an environmental point of view, but would face several challenges with the current plasma technologies available. Indeed, the results show that for current plasma processes to be competitive with conventional processes for syngas production, the energy efficiency, conversion rate, and processing mass flow rates of the unit operations would have to be simultaneously increased. Syngas production would also be highly dependent on the specific energy input and characteristics of the plasma (technology, electric field, power, etc.). CO2 dissociation would give value to carbon dioxide as it consumes 0.33 moles of CO2 for each mole of syngas produced. Therefore, CO2 dissociation can be attractive as a possible option for the conversion of electrical energy to chemical energy, especially when the electrical energy is from a renewable and low cost electricity production. Keywords: carbon dioxide, CO2 dissociation, syngas production, reforming, plasma, coal gasification, natural gas reformin

show abstract

“…On the other hand, in the field of plasma materials chemistry, there has been research on CO generation and quenching positions in the case of CO 2 dissociation [11], and on high-temperature techniques for welding arcs using CO 2 [12]. However, regarding CO 2 arc quenching, the available fundamental data required for development of thermal plasma processes are not sufficient.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic and transport properties of CO₂, CO₂–O₂, and CO₂–H₂ mixtures at temperatures of 300 to 30,000 K and pressures of 0.1 to 10 MPa

Tanaka

Yamachi

Matsumoto

et al. 2008

Electrical Engineering Japan

View full text Add to dashboard Cite

SUMMARYThis paper provides the theoretical calculation results of thermodynamic and transport properties of CO 2 , CO 2 -O 2 mixture, CO 2 -H 2 mixture under thermal equilibrium condition at temperatures of 300 to 30,000 K and at pressures of 0.1 to 10 MPa. The gas CO 2 is one of the candidates for the environmentally benign arc-quenching medium in a circuit breaker. Furthermore, the effect of additional gases O 2 and H 2 on the thermodynamic and transport properties of CO 2 was also investigated in this paper. The hydrogen atom included CO 2 is similar to the polymer ablated vapor in switching devices. First, equilibrium compositions of CO 2 , CO 2 -O 2 mixture, CO 2 -H 2 mixture were calculated through the Gibbs free energy minimization method. Second, thermodynamic properties were computed using the calculated composition. Finally, transport properties were calculated by the first-order approximation of ChapmanEnskog method using the collision integrals between species. Inclusion of H 2 increases the electrical conductivity of CO 2 in the range 3000 to 6000 K because CHO molecules produced in this temperature range emit more electrons due to the lower ionization potential of CHO. It also increases the thermal conductivity of CO 2 especially due to dissociation reactions of H 2 around 3900 K and ionization of H around 15,000 K. These properties provided here can be used for CO 2 thermal plasma simulation.

show abstract

Thermal quenching effects on plasma synthesis of NO and plasma decomposition of CO2

Cited by 15 publications

References 20 publications

Plasma N2-fixation: 1900–2014

Plasma N2-fixation: 1900–2014

Assessment of Carbon Dioxide Dissociation as a New Route for Syngas Production: A Comparative Review and Potential of Plasma-Based Technologies

Thermodynamic and transport properties of CO₂, CO₂–O₂, and CO₂–H₂ mixtures at temperatures of 300 to 30,000 K and pressures of 0.1 to 10 MPa

Contact Info

Product

Resources

About

Thermal quenching effects on plasma synthesis of NO and plasma decomposition of CO2

Cited by 15 publications

References 20 publications

Plasma N2-fixation: 1900–2014

Plasma N2-fixation: 1900–2014

Assessment of Carbon Dioxide Dissociation as a New Route for Syngas Production: A Comparative Review and Potential of Plasma-Based Technologies

Thermodynamic and transport properties of CO2, CO2–O2, and CO2–H2 mixtures at temperatures of 300 to 30,000 K and pressures of 0.1 to 10 MPa

Contact Info

Product

Resources

About

Thermodynamic and transport properties of CO₂, CO₂–O₂, and CO₂–H₂ mixtures at temperatures of 300 to 30,000 K and pressures of 0.1 to 10 MPa