Thermodynamic study of alkali and alkaline-earth cation-exchanged natrolites

Lili Wu; Alexandra Navrotsky; Yongmoon Lee; Yongjae Lee

doi:10.1016/j.micromeso.2012.09.003

Thermodynamic study of alkali and alkaline-earth cation-exchanged natrolites

Lili Wu, Alexandra Navrotsky, Yongmoon Lee, Yongjae Lee

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

11 Citations (Scopus)

Abstract

A series of synthetic natrolites with different non-framework cations (Li-NAT, Na-NAT, K-NAT, Rb-NAT, Cs-NAT, Ca-NAT, Sr-NAT and Pb-NAT) are investigated by high temperature oxide melt solution calorimetry. The formation enthalpy from the component oxides (ΔH_f,ox) becomes less exothermic with increasing ionic potential (Z/r) of the cations. The dehydration behavior of NATs is examined using TG-DSC. The strength of water binding decreases with increasing cation size. Similar to the trend seen in anhydrous zeolites, a linear dependence of ΔH_f,ox on Al/(Al + Si) ratio for hydrous zeolites is established.

Original language	English
Pages (from-to)	221-227
Number of pages	7
Journal	Microporous and Mesoporous Materials
Volume	167
DOIs	https://doi.org/10.1016/j.micromeso.2012.09.003
Publication status	Published - 2013

Bibliographical note

Funding Information:
Synthesis work was jointly supported by The Nuclear R&D program and The Global Research Laboratory program of the Korean Research Foundation. Calorimetry was supported by the U.S. Department of Energy, Grant 97ER14749. We thank Tae-Jin Park, Kristina Lilova and Ao Ji for discussions.

All Science Journal Classification (ASJC) codes

Chemistry(all)
Materials Science(all)
Condensed Matter Physics
Mechanics of Materials

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10.1016/j.micromeso.2012.09.003

Cite this

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title = "Thermodynamic study of alkali and alkaline-earth cation-exchanged natrolites",

abstract = "A series of synthetic natrolites with different non-framework cations (Li-NAT, Na-NAT, K-NAT, Rb-NAT, Cs-NAT, Ca-NAT, Sr-NAT and Pb-NAT) are investigated by high temperature oxide melt solution calorimetry. The formation enthalpy from the component oxides (ΔHf,ox) becomes less exothermic with increasing ionic potential (Z/r) of the cations. The dehydration behavior of NATs is examined using TG-DSC. The strength of water binding decreases with increasing cation size. Similar to the trend seen in anhydrous zeolites, a linear dependence of ΔHf,ox on Al/(Al + Si) ratio for hydrous zeolites is established.",

author = "Lili Wu and Alexandra Navrotsky and Yongmoon Lee and Yongjae Lee",

note = "Funding Information: Synthesis work was jointly supported by The Nuclear R&D program and The Global Research Laboratory program of the Korean Research Foundation. Calorimetry was supported by the U.S. Department of Energy, Grant 97ER14749. We thank Tae-Jin Park, Kristina Lilova and Ao Ji for discussions.",

year = "2013",

doi = "10.1016/j.micromeso.2012.09.003",

language = "English",

volume = "167",

pages = "221--227",

journal = "Microporous and Mesoporous Materials",

issn = "1387-1811",

publisher = "Elsevier",

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T1 - Thermodynamic study of alkali and alkaline-earth cation-exchanged natrolites

AU - Wu, Lili

AU - Navrotsky, Alexandra

AU - Lee, Yongmoon

AU - Lee, Yongjae

N1 - Funding Information: Synthesis work was jointly supported by The Nuclear R&D program and The Global Research Laboratory program of the Korean Research Foundation. Calorimetry was supported by the U.S. Department of Energy, Grant 97ER14749. We thank Tae-Jin Park, Kristina Lilova and Ao Ji for discussions.

PY - 2013

Y1 - 2013

N2 - A series of synthetic natrolites with different non-framework cations (Li-NAT, Na-NAT, K-NAT, Rb-NAT, Cs-NAT, Ca-NAT, Sr-NAT and Pb-NAT) are investigated by high temperature oxide melt solution calorimetry. The formation enthalpy from the component oxides (ΔHf,ox) becomes less exothermic with increasing ionic potential (Z/r) of the cations. The dehydration behavior of NATs is examined using TG-DSC. The strength of water binding decreases with increasing cation size. Similar to the trend seen in anhydrous zeolites, a linear dependence of ΔHf,ox on Al/(Al + Si) ratio for hydrous zeolites is established.

AB - A series of synthetic natrolites with different non-framework cations (Li-NAT, Na-NAT, K-NAT, Rb-NAT, Cs-NAT, Ca-NAT, Sr-NAT and Pb-NAT) are investigated by high temperature oxide melt solution calorimetry. The formation enthalpy from the component oxides (ΔHf,ox) becomes less exothermic with increasing ionic potential (Z/r) of the cations. The dehydration behavior of NATs is examined using TG-DSC. The strength of water binding decreases with increasing cation size. Similar to the trend seen in anhydrous zeolites, a linear dependence of ΔHf,ox on Al/(Al + Si) ratio for hydrous zeolites is established.

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DO - 10.1016/j.micromeso.2012.09.003

M3 - Article

AN - SCOPUS:84871342522

SN - 1387-1811

VL - 167

SP - 221

EP - 227

JO - Microporous and Mesoporous Materials

JF - Microporous and Mesoporous Materials

ER -

Thermodynamic study of alkali and alkaline-earth cation-exchanged natrolites

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

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