Sol‐gel preparation and properties of Alumina adsorbents for gas separation

Deng, Qiang

doi:10.1002/aic.690410314

Cited by 30 publications

(22 citation statements)

References 43 publications

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“…Sol-gel-derived CuCl/γ-alumina adsorbents have large surface areas and nanopore sizes with uniform pore size distributions. 14 Preferential adsorption of ethylene and fast sorption kinetics on the CuCl-modified γ-alumina thin films and granular particles (2-3 mm) were reported recently by Wang and Lin. 15 The methods used to make these thin films and granular sorbents in these studies were similar to that for synthesis of supported γ-alumina membranes.…”

Section: Introductionmentioning

confidence: 75%

Cuprous-Chloride-Modified Nanoporous Alumina Membranes for Ethylene−Ethane Separation

Yue

Wang

et al. 1999

Ind. Eng. Chem. Res.

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This paper reports an attempt to synthesize a CuCl-modified γ-alumina membrane for separation of ethylene from ethane. CuCl was effectively coated in the 4 nm pore γ-alumina top layers of disk-shaped and tubular alumina membranes by the reservoir method. Permeation of a single gas and binary mixture of ethylene and ethane was measured to characterize separation properties of the modified membranes. Pure ethylene permeance of the CuCl-modified membrane is 10-40% lower than that predicted from the pure ethane permeance by the Knudsen theory. This result is explained by a model based on the adsorbed layer of ethylene via π-complexation. Such an adsorbed layer hinders the diffusion of ethylene in the nanopores of CuCl-modified γ-alumina. Multiple gas permeation measurements on the CuCl-modified membranes show a separation factor for ethylene over ethane larger than the Knudsen value. This confirms a positive contribution of the surface flow of ethylene to the permeance of ethylene in the multiple gas permeation system. A maximum separation factor for ethylene over ethane of 1.4 is obtained for the CuCl-modified membrane at 60 °C.

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Section: Introductionmentioning

confidence: 75%

Cuprous-Chloride-Modified Nanoporous Alumina Membranes for Ethylene−Ethane Separation

Yue

Wang

et al. 1999

Ind. Eng. Chem. Res.

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“…CaCl2 30 white a CuO-3 was prepared by the wet-impregnation method with an ammonia cuprous solution (Deng and Lin, 1995a).…”

Section: Methodsmentioning

confidence: 99%

“…Ceramic sorbents synthesized by the sol-gel method typically have a rather high surface area, uniform pore size distribution, and large pore volume (Deng and Lin, 1995a). Furthermore, the microstructure of the solgel-derived ceramics consists of nanoscale crystalline particles bound strongly by necks of the same material formed through sintering.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Stability, and Sulfation Properties of Sol−Gel-Derived Regenerative Sorbents for Flue Gas Desulfurization

Deng

1996

Ind. Eng. Chem. Res.

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The sol-gel method is applied to prepare γ-alumina-supported copper oxide and calcium oxide sorbents containing 10-50 wt % active species. The prepared sorbents are characterized for their pore texture, dispersion of active species on the surface of support, and desulfurization properties. The sol-gel-derived alumina-supported sorbents have a relatively large surface area (>200 m 2 /g) and pore volume (>0.3 cm 3 /g) and uniform pore size distribution (20-60 Å). Thermal and chemical stability of the sol-gel-derived sorbents is studied by comparing the pore texture data of the sorbents before and after several different heat treatments. The stability results show that the pore structure of the sol-gel-derived sorbents is stable in the normal conditions of the flue gas desulfurization process. It is found that CuO/γ-Al 2 O 3 sorbent containing 20 wt % of CuO coated as a monolayer or submonolayer on the surface of support has the highest SO 2 sorption capacity (22.5 wt % at 500°C). The sol-gel-derived CuO/γ-Al 2 O 3 sorbent exhibits desired sulfation and regeneration properties.

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“…A detailed description of the synthesis of activated alumina adsorbent beads using a modified sol-gel process can be found in our previous publications [18,19]. The sol-gel process started with synthesis of a stable boehmite sol (c-ALOOH) by dissolving alumina-tri-secondary butoxide in deionized water at an initial temperature of 75°C.…”

Section: Preparation Of the Sol-gel-derived Activated Alumina Adsorbentsmentioning

confidence: 99%

Adsorption equilibrium and kinetics of fluoride on sol–gel-derived activated alumina adsorbents

Camacho

Torres

Saha

et al. 2010

Journal of Colloid and Interface Science

143

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Sol‐gel preparation and properties of Alumina adsorbents for gas separation

Abstract: The sol-gel method is applied to prepare Cu '

Cited by 30 publications

References 43 publications

Cuprous-Chloride-Modified Nanoporous Alumina Membranes for Ethylene−Ethane Separation

Cuprous-Chloride-Modified Nanoporous Alumina Membranes for Ethylene−Ethane Separation

Synthesis, Stability, and Sulfation Properties of Sol−Gel-Derived Regenerative Sorbents for Flue Gas Desulfurization

Adsorption equilibrium and kinetics of fluoride on sol–gel-derived activated alumina adsorbents

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