Simultaneous Determination of SO<sub>3(g)</sub> and SO<sub>2(g)</sub> in a Flowing Gas

Ibáñez, Jorge G.; Batten, and Charles F.; Wentworth, W. E.

doi:10.1021/ie0715198

Cited by 13 publications

(9 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The majority of the generated gases, such as CO, CO 2 , SO 2 , and O 2 , were monitored continuously using a micro-gas chromatograph (micro-GC) (Agilent GC 490). SO 3 was determined by the method developed by Ibanez et al, 14 and its operation procedure was detailed elsewhere. 17 In brief, calcium oxalate mixed with glass beads was used in the SO 3 trap, for which the temperature was controlled in between 300 °C and 375 °C.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

“…Several techniques have been used for the measurement of SO 3 , such as controlled condensation method, isopropyl alcohol drop method, isopropyl alcohol absorption bottle method, salt method, Pentol SO 3 monitor (using Severn Science Analyzer), Fourier transform infrared (FTIR) spectroscopy, and mass spectrometer . Another method was developed by Ibanez et al, who used calcium oxalate as a reagent which reacts only with SO 3 (not with SO 2 ) under certain conditions to produce a more stable and conveniently measured molecule. In the oxy-fuel combustion atmosphere due to the low concentration of air-borne nitrogen and production of water vapor, higher levels of SO 2 (and consequently SO 3 ) was produced compared to that in air combustion. ,, Therefore, in oxy-fuel combustion it is very important to know the level of SO 3 formation.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Nitrogen Oxides, Sulfur Trioxide, and Mercury Emissions during Oxy-fuel Fluidized Bed Combustion of Victorian Brown Coal

Roy

Chen

Bhattacharya

2014

Environ. Sci. Technol.

View full text Add to dashboard Cite

This study investigates, for the first time, the NOx, N2O, SO3, and Hg emissions from combustion of a Victorian brown coal in a 10 kWth fluidized bed unit under oxy-fuel combustion conditions. Compared to air combustion, lower NOx emissions and higher N2O formation were observed in the oxy-fuel atmosphere. These NOx reduction and N2O formations were further enhanced with steam in the combustion environment. The NOx concentration level in the flue gas was within the permissible limit in coal-fired power plants in Victoria. Therefore, an additional NOx removal system will not be required using this coal. In contrast, both SO3 and gaseous mercury concentrations were considerably higher under oxy-fuel combustion compared to that in the air combustion. Around 83% of total gaseous mercury released was Hg(0), with the rest emitted as Hg(2+). Therefore, to control harmful Hg(0), a mercury removal system may need to be considered to avoid corrosion in the boiler and CO2 separation units during the oxy-fuel fluidized-bed combustion using this coal.

show abstract

Section: ■ Materials and Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Nitrogen Oxides, Sulfur Trioxide, and Mercury Emissions during Oxy-fuel Fluidized Bed Combustion of Victorian Brown Coal

Roy

Chen

Bhattacharya

2014

Environ. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…The following SO 3 determination method was used in this study. 15 At temperature between 573 and 648 K, Calcium oxalate reacts with SO 3 (g), but not with SO 2 , following Scheme 1. Therefore, SO 3 can be measured indirectly by measuring CO by the micro-GC in the molecular sieve column.…”

Section: Methodsmentioning

confidence: 99%

Sulfur Emission from Victorian Brown Coal Under Pyrolysis, Oxy-Fuel Combustion and Gasification Conditions

Chen

Bhattacharya

2013

Environ. Sci. Technol.

View full text Add to dashboard Cite

Sulfur emission from a Victorian brown coal was quantitatively determined through controlled experiments in a continuously fed drop-tube furnace under three different atmospheres: pyrolysis, oxy-fuel combustion, and carbon dioxide gasification conditions. The species measured were H(2)S, SO(2), COS, CS(2), and more importantly SO(3). The temperature (873-1273 K) and gas environment effects on the sulfur species emission were investigated. The effect of residence time on the emission of those species was also assessed under oxy-fuel condition. The emission of the sulfur species depended on the reaction environment. H(2)S, SO(2), and CS(2) are the major species during pyrolysis, oxy-fuel, and gasification. Up to 10% of coal sulfur was found to be converted to SO(3) under oxy-fuel combustion, whereas SO(3) was undetectable during pyrolysis and gasification. The trend of the experimental results was qualitatively matched by thermodynamic predictions. The residence time had little effect on the release of those species. The release of sulfur oxides, in particular both SO(2) and SO(3), is considerably high during oxy-fuel combustion even though the sulfur content in Morwell coal is only 0.80%. Therefore, for Morwell coal utilization during oxy-fuel combustion, additional sulfur removal, or polishing systems will be required in order to avoid corrosion in the boiler and in the CO(2) separation units of the CO(2) capture systems.

show abstract

“…Ibanez et al . described an indirect measurement method employing calcium oxalate, which is based on the next reaction:

S {normalO}_{3} + Ca {normalC}_{2} {normalO}_{4} \to CaS {normalO}_{4} + normalC {normalO}_{2} + CO

This method is sensitive to temperature control and the reaction vessel should be maintained at 325 °C.…”

Section: Background For So3 Formation In Combustionmentioning

confidence: 99%

“…Ibanez et al 113 described an indirect measurement method employing calcium oxalate, which is based on the next reaction:…”

Section: Indirect Measurements Of Somentioning

confidence: 99%

Sulfur trioxide formation/emissions in coal‐fired air‐ and oxy‐fuel combustion processes: a review

et al. 2018

View full text Add to dashboard Cite

In oxy‐fuel combustion, fuel is burned using oxygen together with recycled flue gas, which is needed to control the combustion temperature. This leads to higher concentrations of sulfur dioxide and sulfur trioxide in the recycled gas, which can result in the formation of sulfuric acid and enhanced corrosion. Current experimental data on SO3 formation, reaction mechanisms, and mathematical modelling have indicated significant differences in SO3 formation between air‐ and oxy‐fuel combustion for both the wet and dry flue gas recycle options. This paper provides an extensive review of sulfur trioxide formation in air‐ and oxy‐fuel combustion environments, with an emphasis on coal‐fired systems. The first part summarizes recent findings on oxy‐fuel combustion experiments, as they affect sulfur trioxide formation. In the second part, the review focuses on sulfur trioxide formation mechanisms, and the influence of catalysis on sulfur trioxide formation. Finally, the current methods for measuring sulfur trioxide concentration are also reviewed along with the major difficulties associated with those measurements using data available from both bench‐ and pilot‐scale units. © 2018 Society of Chemical Industry and John Wiley & Sons, Ltd.

show abstract

Simultaneous Determination of SO_3(g) and SO_2(g) in a Flowing Gas

Cited by 13 publications

References 52 publications

Nitrogen Oxides, Sulfur Trioxide, and Mercury Emissions during Oxy-fuel Fluidized Bed Combustion of Victorian Brown Coal

Nitrogen Oxides, Sulfur Trioxide, and Mercury Emissions during Oxy-fuel Fluidized Bed Combustion of Victorian Brown Coal

Sulfur Emission from Victorian Brown Coal Under Pyrolysis, Oxy-Fuel Combustion and Gasification Conditions

Sulfur trioxide formation/emissions in coal‐fired air‐ and oxy‐fuel combustion processes: a review

Contact Info

Product

Resources

About

Simultaneous Determination of SO3(g) and SO2(g) in a Flowing Gas

Cited by 13 publications

References 52 publications

Nitrogen Oxides, Sulfur Trioxide, and Mercury Emissions during Oxy-fuel Fluidized Bed Combustion of Victorian Brown Coal

Nitrogen Oxides, Sulfur Trioxide, and Mercury Emissions during Oxy-fuel Fluidized Bed Combustion of Victorian Brown Coal

Sulfur Emission from Victorian Brown Coal Under Pyrolysis, Oxy-Fuel Combustion and Gasification Conditions

Sulfur trioxide formation/emissions in coal‐fired air‐ and oxy‐fuel combustion processes: a review

Contact Info

Product

Resources

About

Simultaneous Determination of SO_3(g) and SO_2(g) in a Flowing Gas