Influence of Water Addition on Crystalline Silicotitanate Column Operation

Stallings, Mary

doi:10.2172/786595

Cited by 2 publications

(3 citation statements)

References 8 publications

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“…Results from the aluminum-hydroxide test were consistent with a study of aluminum hydroxide precipitation from SRS simulant (Stallings et al 2001). Thus, pumping water into the column filled with simulant under no conditions produced a precipitate of aluminum hydroxide.…”

Section: Discussionsupporting

confidence: 80%

“…However, subsequent attempts to reproduce the conditions that led to this plugging have been unsuccessful (Stallings et al 2001). As pointed out by the Technical Advisory Team to DOE EM-50, such plugging could produce a situation where heat transfer is hindered and a fully loaded 16 × 5 ft column could overheat with catastrophic consequences.…”

Section: Test Objectivesmentioning

confidence: 99%

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Pilot-Scale Test of Counter-Current Ion Exchange (CCIX) Using UOP IONSIV IE-911

Wester¹,

Leugemors²,

Taylor³

2001

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SummaryA pilot-scale test of a moving-bed configuration of a UOP IONSIV ® IE-911 ion-exchange column was performed over 17 days at Severn Trent Services facilities. The objectives of the test, in order of priority, were to determine if aluminosilicate precipitation caused clumping of IE-911 particles in the column, to observe the effect on aluminum-hydroxide precipitation of water added to a simulant-filled column, to evaluate the extent of particle attrition, and to measure the expansion of the mass-transfer zone under the influence of column pulsing. The IE-911 moved through the column with no apparent clumping during the test, although analytical results indicate that little if any aluminosilicate precipitated onto the particles. A precipitate of aluminum hydroxide was not produced when water was added to the simulant-filled column, indicating that this upset scenario is probably of little concern. Particle-size distributions remained relatively constant with time and position in the column, indicating that particle attrition was not significant. The expansion of the mass-transfer zone could not be accurately measured because of the slow loading kinetics of the IE-911 and the short duration of the test; however, the information obtained indicates that back-mixing of sorbent is not extensive.v

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Section: Discussionsupporting

confidence: 80%

Section: Test Objectivesmentioning

confidence: 99%

Pilot-Scale Test of Counter-Current Ion Exchange (CCIX) Using UOP IONSIV IE-911

Wester¹,

Leugemors²,

Taylor³

2001

View full text Add to dashboard Cite

show abstract

“…At least one incident of column plugging after a column test of IE-911 was reportedly caused by inadvertent admission of water to the column with subsequent formation of aluminum hydroxide and the inability to sluice IE-911 from the column (Walker 2000). However, subsequent attempts to reproduce the conditions that led to this plugging have been unsuccessful (Stallings et al 2001). As pointed out by the Technical Advisory Team to DOE EM-50, such plugging could produce a situation where heat transfer is hindered and a fully loaded 16 × 5 ft column could overheat with catastrophic consequences.…”

Section: Test Objectivesmentioning

confidence: 99%

Pilot-Scale Test of Counter-Current Ion Exchange (CCIX) Using UOP IONSIV IE-911

Wester¹,

Fondeur²,

Dennis³

et al. 2001

View full text Add to dashboard Cite

A pilot-scale test of a moving-bed configuration of a UOP IONSIV ® IE-911 ion-exchange column was performed over 17 days at Severn Trent Services facilities. The objectives of the test, in order of priority, were to determine if aluminosilicate precipitation caused clumping of IE-911 particles in the column, to observe the effect on aluminum-hydroxide precipitation of water added to a simulant-filled column, to evaluate the extent of particle attrition, and to measure the expansion of the mass-transfer zone under the influence of column pulsing. The IE-911 moved through the column with no apparent clumping during the test, although analytical results indicate that little if any aluminosilicate precipitated onto the particles. A precipitate of aluminum hydroxide was not produced when water was added to the simulant-filled column, indicating that this upset scenario is probably of little concern. Particle-size distributions remained relatively constant with time and position in the column, indicating that particle attrition was not significant. The expansion of the mass-transfer zone could not be accurately measured because of the slow loading kinetics of the IE-911 and the short duration of the test; however, the information obtained indicates that back-mixing of sorbent is not extensive.

show abstract

Influence of Water Addition on Crystalline Silicotitanate Column Operation

Cited by 2 publications

References 8 publications

Pilot-Scale Test of Counter-Current Ion Exchange (CCIX) Using UOP IONSIV IE-911

Pilot-Scale Test of Counter-Current Ion Exchange (CCIX) Using UOP IONSIV IE-911

Pilot-Scale Test of Counter-Current Ion Exchange (CCIX) Using UOP IONSIV IE-911

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