Solubility in the NaOH-Na2CO3-Na2SO 4-Na2SO3-Na2S2O 3-Na2S-H2O system, a simulated black liquor recovery boiler smelt

Camille Y. Jones; Gang Chen; Sheng Dai; Preet M. Singh

doi:10.1021/ie010826p

Solubility in the NaOH-Na₂CO₃-Na₂SO ₄-Na₂SO₃-Na₂S₂O ₃-Na₂S-H₂O system, a simulated black liquor recovery boiler smelt

Camille Y. Jones, Gang Chen, Sheng Dai, Preet M. Singh

Chemical Sciences Division

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

Results are presented for a study on the dissolution behavior of salt mixtures formulated to simulate smelt deposits inside pulp mill recovery boilers. Solubilities of carbonate-rich NaOH-Na₂CO ₃-Na₂SO₄ and NaOH-Na₂CO ₃-Na₂SO₄-Na₂SO₃-Na ₂S₂O₃-Na₂S mixtures in water at 25 °C and 1 bar exhibited an increase in the concentration of Na ₂CO₃(aq) and Na₂SO₄(aq) with an increasing amount of water added. An ion-interaction solution model explains this behavior as resulting from the suppressive effect of NaOH on the solubility of other salts; dilution of NaOH increases the solubility of Na ₂SO₄ and Na₂CO₃. In addition, the formation of hydrated salts of Na₂CO₃ and Na ₂SO₄ reduced the amount of liquid water present and thus had a concentrating effect on NaOH(aq). These results are applied to understanding the role of smelt - water mixtures in corrosion of stainless steel in boiler floors.

Original language	English
Pages (from-to)	4228-4233
Number of pages	6
Journal	Industrial and Engineering Chemistry Research
Volume	42
Issue number	18
DOIs	https://doi.org/10.1021/ie010826p
State	Published - Sep 3 2003

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title = "Solubility in the NaOH-Na2CO3-Na2SO 4-Na2SO3-Na2S2O 3-Na2S-H2O system, a simulated black liquor recovery boiler smelt",

abstract = "Results are presented for a study on the dissolution behavior of salt mixtures formulated to simulate smelt deposits inside pulp mill recovery boilers. Solubilities of carbonate-rich NaOH-Na2CO 3-Na2SO4 and NaOH-Na2CO 3-Na2SO4-Na2SO3-Na 2S2O3-Na2S mixtures in water at 25 °C and 1 bar exhibited an increase in the concentration of Na 2CO3(aq) and Na2SO4(aq) with an increasing amount of water added. An ion-interaction solution model explains this behavior as resulting from the suppressive effect of NaOH on the solubility of other salts; dilution of NaOH increases the solubility of Na 2SO4 and Na2CO3. In addition, the formation of hydrated salts of Na2CO3 and Na 2SO4 reduced the amount of liquid water present and thus had a concentrating effect on NaOH(aq). These results are applied to understanding the role of smelt - water mixtures in corrosion of stainless steel in boiler floors.",

author = "Jones, {Camille Y.} and Gang Chen and Sheng Dai and Singh, {Preet M.}",

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T1 - Solubility in the NaOH-Na2CO3-Na2SO 4-Na2SO3-Na2S2O 3-Na2S-H2O system, a simulated black liquor recovery boiler smelt

AU - Jones, Camille Y.

AU - Chen, Gang

AU - Dai, Sheng

AU - Singh, Preet M.

PY - 2003/9/3

Y1 - 2003/9/3

N2 - Results are presented for a study on the dissolution behavior of salt mixtures formulated to simulate smelt deposits inside pulp mill recovery boilers. Solubilities of carbonate-rich NaOH-Na2CO 3-Na2SO4 and NaOH-Na2CO 3-Na2SO4-Na2SO3-Na 2S2O3-Na2S mixtures in water at 25 °C and 1 bar exhibited an increase in the concentration of Na 2CO3(aq) and Na2SO4(aq) with an increasing amount of water added. An ion-interaction solution model explains this behavior as resulting from the suppressive effect of NaOH on the solubility of other salts; dilution of NaOH increases the solubility of Na 2SO4 and Na2CO3. In addition, the formation of hydrated salts of Na2CO3 and Na 2SO4 reduced the amount of liquid water present and thus had a concentrating effect on NaOH(aq). These results are applied to understanding the role of smelt - water mixtures in corrosion of stainless steel in boiler floors.

AB - Results are presented for a study on the dissolution behavior of salt mixtures formulated to simulate smelt deposits inside pulp mill recovery boilers. Solubilities of carbonate-rich NaOH-Na2CO 3-Na2SO4 and NaOH-Na2CO 3-Na2SO4-Na2SO3-Na 2S2O3-Na2S mixtures in water at 25 °C and 1 bar exhibited an increase in the concentration of Na 2CO3(aq) and Na2SO4(aq) with an increasing amount of water added. An ion-interaction solution model explains this behavior as resulting from the suppressive effect of NaOH on the solubility of other salts; dilution of NaOH increases the solubility of Na 2SO4 and Na2CO3. In addition, the formation of hydrated salts of Na2CO3 and Na 2SO4 reduced the amount of liquid water present and thus had a concentrating effect on NaOH(aq). These results are applied to understanding the role of smelt - water mixtures in corrosion of stainless steel in boiler floors.

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U2 - 10.1021/ie010826p

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JO - Industrial and Engineering Chemistry Research

JF - Industrial and Engineering Chemistry Research

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ER -

Solubility in the NaOH-Na₂CO₃-Na₂SO ₄-Na₂SO₃-Na₂S₂O ₃-Na₂S-H₂O system, a simulated black liquor recovery boiler smelt

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