New sulfur adsorbents derived from layered double hydroxides. I: Synthesis and COS adsorption

Dennis E. Sparks; Tonya Morgan; Patricia M. Patterson; S. Adam Tackett; Erin Morris; Mark Crocker

doi:10.1016/j.apcatb.2008.01.012

New sulfur adsorbents derived from layered double hydroxides. I: Synthesis and COS adsorption

Dennis E. Sparks
, Tonya Morgan
, Patricia M. Patterson
, S. Adam Tackett
, Erin Morris
, Mark Crocker

Chemistry

Producción científica: Article › revisión exhaustiva

45 Citas (Scopus)

Resumen

Mixed oxides, prepared via the thermal decomposition of layered double hydroxides (LDHs), were screened gravimetrically for their ability to adsorb carbonyl sulfide (COS). Based on promising results obtained for Ni/Mg/Al, Ni/Mg/Fe and Co/Mg/Al mixed oxides, a study was undertaken to optimize the composition of these materials for COS adsorption. To investigate the effect of the M(II):M(III) ratio, LDHs of the type [M_zMg_yAl_x(OH)₂](CO₃)_x/2·0.5H₂O (where M = Ni or Co, and x + y + z = 1) were prepared at values of x corresponding to 0.33 and 0.20. Simultaneously, the elemental ratio of transition metal to magnesium (z/y) was varied. Mixed oxides obtained from the resulting LDHs were tested in fixed bed mode with a feed of 100 ppm COS in N₂ to determine breakthrough capacity. In general Ni/Mg/Al mixed oxides showed the best performance, a composition with Ni/Mg/Al = 0.32/0.48/0.20 showing the best adsorption capacity. Treatment of the spent adsorbent under an atmosphere of 5% H₂ in N₂ at 450 °C was found to provide an effective means of restoring the adsorption capacity over two cycles of adsorption and regeneration, although after three such cycles, adsorption capacity decreased.

Idioma original	English
Páginas (desde-hasta)	190-198
Número de páginas	9
Publicación	Applied Catalysis B: Environmental
Volumen	82
N.º	3-4
DOI	https://doi.org/10.1016/j.apcatb.2008.01.012
Estado	Published - ago 8 2008

Nota bibliográfica

Funding Information:
The authors wish to thank Gerald Thomas for performing the X-ray diffraction measurements and Dr. Timothy C. Golden of Air Products and Chemicals, Inc. for providing commercial adsorbent samples. This research work was supported in part by a grant from the Kentucky Science and Engineering Foundation as per Grant Agreement #KSEF-148-502-05-134 with the Kentucky Science and Technology Corporation.

Financiación

The authors wish to thank Gerald Thomas for performing the X-ray diffraction measurements and Dr. Timothy C. Golden of Air Products and Chemicals, Inc. for providing commercial adsorbent samples. This research work was supported in part by a grant from the Kentucky Science and Engineering Foundation as per Grant Agreement #KSEF-148-502-05-134 with the Kentucky Science and Technology Corporation.

Financiadores	Número del financiador
Kentucky Science and Technology Corporation
Kentucky Science and Engineering Foundation	-148-502-05-134

ASJC Scopus subject areas

Catalysis
General Environmental Science
Process Chemistry and Technology

Acceder al documento

10.1016/j.apcatb.2008.01.012

Otros archivos y enlaces

Citar esto

@article{89ae1b96c22441f3b49b421a559130cd,

title = "New sulfur adsorbents derived from layered double hydroxides. I: Synthesis and COS adsorption",

abstract = "Mixed oxides, prepared via the thermal decomposition of layered double hydroxides (LDHs), were screened gravimetrically for their ability to adsorb carbonyl sulfide (COS). Based on promising results obtained for Ni/Mg/Al, Ni/Mg/Fe and Co/Mg/Al mixed oxides, a study was undertaken to optimize the composition of these materials for COS adsorption. To investigate the effect of the M(II):M(III) ratio, LDHs of the type [MzMgyAlx(OH)2](CO3)x/2·0.5H2O (where M = Ni or Co, and x + y + z = 1) were prepared at values of x corresponding to 0.33 and 0.20. Simultaneously, the elemental ratio of transition metal to magnesium (z/y) was varied. Mixed oxides obtained from the resulting LDHs were tested in fixed bed mode with a feed of 100 ppm COS in N2 to determine breakthrough capacity. In general Ni/Mg/Al mixed oxides showed the best performance, a composition with Ni/Mg/Al = 0.32/0.48/0.20 showing the best adsorption capacity. Treatment of the spent adsorbent under an atmosphere of 5\% H2 in N2 at 450 °C was found to provide an effective means of restoring the adsorption capacity over two cycles of adsorption and regeneration, although after three such cycles, adsorption capacity decreased.",

keywords = "Adsorption, Carbonyl sulfide, Hydrotalcite, Layered double hydroxide, Methyl mercaptan",

author = "Sparks, \{Dennis E.\} and Tonya Morgan and Patterson, \{Patricia M.\} and Tackett, \{S. Adam\} and Erin Morris and Mark Crocker",

note = "Funding Information: The authors wish to thank Gerald Thomas for performing the X-ray diffraction measurements and Dr. Timothy C. Golden of Air Products and Chemicals, Inc. for providing commercial adsorbent samples. This research work was supported in part by a grant from the Kentucky Science and Engineering Foundation as per Grant Agreement \#KSEF-148-502-05-134 with the Kentucky Science and Technology Corporation. ",

year = "2008",

month = aug,

day = "8",

doi = "10.1016/j.apcatb.2008.01.012",

language = "English",

volume = "82",

pages = "190--198",

number = "3-4",

}

TY - JOUR

T1 - New sulfur adsorbents derived from layered double hydroxides. I

T2 - Synthesis and COS adsorption

AU - Sparks, Dennis E.

AU - Morgan, Tonya

AU - Patterson, Patricia M.

AU - Tackett, S. Adam

AU - Morris, Erin

AU - Crocker, Mark

N1 - Funding Information: The authors wish to thank Gerald Thomas for performing the X-ray diffraction measurements and Dr. Timothy C. Golden of Air Products and Chemicals, Inc. for providing commercial adsorbent samples. This research work was supported in part by a grant from the Kentucky Science and Engineering Foundation as per Grant Agreement #KSEF-148-502-05-134 with the Kentucky Science and Technology Corporation.

PY - 2008/8/8

Y1 - 2008/8/8

N2 - Mixed oxides, prepared via the thermal decomposition of layered double hydroxides (LDHs), were screened gravimetrically for their ability to adsorb carbonyl sulfide (COS). Based on promising results obtained for Ni/Mg/Al, Ni/Mg/Fe and Co/Mg/Al mixed oxides, a study was undertaken to optimize the composition of these materials for COS adsorption. To investigate the effect of the M(II):M(III) ratio, LDHs of the type [MzMgyAlx(OH)2](CO3)x/2·0.5H2O (where M = Ni or Co, and x + y + z = 1) were prepared at values of x corresponding to 0.33 and 0.20. Simultaneously, the elemental ratio of transition metal to magnesium (z/y) was varied. Mixed oxides obtained from the resulting LDHs were tested in fixed bed mode with a feed of 100 ppm COS in N2 to determine breakthrough capacity. In general Ni/Mg/Al mixed oxides showed the best performance, a composition with Ni/Mg/Al = 0.32/0.48/0.20 showing the best adsorption capacity. Treatment of the spent adsorbent under an atmosphere of 5% H2 in N2 at 450 °C was found to provide an effective means of restoring the adsorption capacity over two cycles of adsorption and regeneration, although after three such cycles, adsorption capacity decreased.

AB - Mixed oxides, prepared via the thermal decomposition of layered double hydroxides (LDHs), were screened gravimetrically for their ability to adsorb carbonyl sulfide (COS). Based on promising results obtained for Ni/Mg/Al, Ni/Mg/Fe and Co/Mg/Al mixed oxides, a study was undertaken to optimize the composition of these materials for COS adsorption. To investigate the effect of the M(II):M(III) ratio, LDHs of the type [MzMgyAlx(OH)2](CO3)x/2·0.5H2O (where M = Ni or Co, and x + y + z = 1) were prepared at values of x corresponding to 0.33 and 0.20. Simultaneously, the elemental ratio of transition metal to magnesium (z/y) was varied. Mixed oxides obtained from the resulting LDHs were tested in fixed bed mode with a feed of 100 ppm COS in N2 to determine breakthrough capacity. In general Ni/Mg/Al mixed oxides showed the best performance, a composition with Ni/Mg/Al = 0.32/0.48/0.20 showing the best adsorption capacity. Treatment of the spent adsorbent under an atmosphere of 5% H2 in N2 at 450 °C was found to provide an effective means of restoring the adsorption capacity over two cycles of adsorption and regeneration, although after three such cycles, adsorption capacity decreased.

KW - Adsorption

KW - Carbonyl sulfide

KW - Hydrotalcite

KW - Layered double hydroxide

KW - Methyl mercaptan

UR - https://www.scopus.com/pages/publications/47249163804

UR - https://www.scopus.com/pages/publications/47249163804#tab=citedBy

U2 - 10.1016/j.apcatb.2008.01.012

DO - 10.1016/j.apcatb.2008.01.012

M3 - Article

AN - SCOPUS:47249163804

SN - 0926-3373

VL - 82

SP - 190

EP - 198

JO - Applied Catalysis B: Environmental

JF - Applied Catalysis B: Environmental

IS - 3-4

ER -

New sulfur adsorbents derived from layered double hydroxides. I: Synthesis and COS adsorption

Resumen

Nota bibliográfica

Financiación

ASJC Scopus subject areas

Acceder al documento

Otros archivos y enlaces

Huella

Citar esto