Off-gas characteristics of defense waste vitrification using liquid-fed Joule-heated ceramic melters

Goles, R.W.; Sevigny, Gary J.

doi:10.2172/5795560

Cited by 11 publications

(11 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(13) was further validated against the Pilot-Scale Ceramic Melter (PSCM) data taken at the Pacific Northwest Laboratory. 12 A good agreement is again shown between the calculated PSCM vapor space gas temperatures and those predicted by Eq. (13).…”

Section: Off-gas Combustion Modelsupporting

confidence: 68%

“…(11) according to the literature and, to a lesser extent, via Eq. (12). Therefore, before the existing cold cap model can be validated against the baseline feed data, a model for the gaseous formic acid decomposition must be developed first which can predict the extent of formic acid decomposition and subsequent formation of CO and H 2 .…”

Section: Model Development Adjustment and Validationmentioning

confidence: 99%

See 1 more Smart Citation

Melter Off-Gas Flammability Assessment for DWPF Alternate Reductant Flowsheet Options

Choi¹

2011

View full text Add to dashboard Cite

EXECUTIVE SUMMARYGlycolic acid and sugar are being considered as potential candidates to substitute for much of the formic acid currently being added to the DWPF melter feed as a reductant. A series of small-scale melter tests were conducted at the Vitreous State Laboratory (VSL) in January 2011 to collect necessary data for the scoping assessment of the impact of these alternate reductants on the melter off-gas flammability. The resulting data were analyzed in this work with the aid of modeling and re-baselined to reflect the DWPF melter operating conditions. Based on the results of these steady state analyses presented in this report, the following conclusions can be drawn:1. The baseline formic acid flowsheet feed has ~3X higher melter off-gas flammability potential than either the glycolic acid or sugar-based flowsheet feed at measured vapor space temperatures ≤ 500 o C.2. The melter off-gas flammability potentials of the glycolic and sugar-based flowsheet feeds are similar at measured vapor space temperatures ≤ 500 o C.3. The 3X difference in melter off-gas flammability potential between the baseline and either alternate reductant feeds is expected to decrease significantly at typical vapor space operating temperatures  500 o C for both bubbled and non-bubbled operations due to increased kinetics of H 2 and CO oxidation.4. Bubbling increases the melter off-gas flammability potential likely due to increased feed rate at a relatively constant air purge rate.5. It appears that over 50% of the glycolate detected by IC in the glycolic flowsheet feed remained un-dissociated and exited the melter as such, thus having no significant impact on either the glass redox or melter off-gas flammability potential. The condensed glycolic acid will then have to be neutralized and recycled back to the Tank Farms.

show abstract

Section: Off-gas Combustion Modelsupporting

confidence: 68%

Section: Model Development Adjustment and Validationmentioning

confidence: 99%

Melter Off-Gas Flammability Assessment for DWPF Alternate Reductant Flowsheet Options

Choi¹

2011

View full text Add to dashboard Cite

show abstract

“…Other authors (Goles, 1983;Burkholder, 1987;Jantzen 1991 and Spalding (1989Spalding ( ,1992Spalding ( , and 1994,studied the volatility of Cs -from soil and soil limestone mixtures Erom the White Oak Creek floodplain. The compositions are listed in Table 3.32.1.…”

Section: Cesium Speciation In Vaporsmentioning

confidence: 99%

Volatility literature of chlorine, iodine, cesium, strontium, technetium, and rhenium; technetium and rhenium volatility testing

Langowski¹,

Darab²,

Smith³

1996

View full text Add to dashboard Cite

This report reviews the voIatili&hterature relevant to iodinerstrontium, cesium and chlorine as might be expected from the vitrification of low-level wastes at Hanford. In addition, the report contains a review of the aqueous chemistry and volatilization behavior of technetium and a proposed surrogate, rhenium. Some preliminary tests of technetium and rhenium volatility have been performed and are reported iii . .

show abstract

“…Frequent surges when feeding an alkaline liquid feed are illustrated in Figure 2.1. There are short-term gas flow rate sur@ of 50% to 100% of the average gas flow rate in this case (Goles and Sevigny 1993). To design a reasonably economical off-gas treatment system, it is important to operate a melter in a manner that minimbs gas surging.…”

Section: Offand= Characterisbics Of the Liquid-fed (6m) C E D C Meltermentioning

confidence: 92%

Process system evaluation-consolidated letters. Volume 1. Alternatives for the off-gas treatment system for the low-level waste vitrification process

Peurrung¹,

DeForest²,

Richards³

1996

View full text Add to dashboard Cite

show abstract

Off-gas characteristics of defense waste vitrification using liquid-fed Joule-heated ceramic melters

Cited by 11 publications

References 0 publications

Melter Off-Gas Flammability Assessment for DWPF Alternate Reductant Flowsheet Options

Melter Off-Gas Flammability Assessment for DWPF Alternate Reductant Flowsheet Options

Volatility literature of chlorine, iodine, cesium, strontium, technetium, and rhenium; technetium and rhenium volatility testing

Process system evaluation-consolidated letters. Volume 1. Alternatives for the off-gas treatment system for the low-level waste vitrification process

Contact Info

Product

Resources

About