Granulation of sol-gel-derived nanostructured alumina

Journal Article · Fri Jan 31 23:00:00 EST 1997 · AIChE Journal

DOI:https://doi.org/10.1002/aic.690430223· OSTI ID:511978

Deng, S G; Lin, Y S ^[1]

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1. Univ. of Cincinnati, OH (United States). Dept. of Chemical Engineering

A sol-gel granulation process was developed to prepare porous nanostructured {gamma}-alumina granules as supports for catalysts and adsorbents. The process, which starts with an aqueous sol of gelatinous boehmite, involves droplet formation, gelation in paraffin oil, conditioning in ammonia solution, and drying and calcination in air under controlled conditions. The {gamma}-Al{sub 2}O{sub 3} granules prepared are 1--3 mm-dia. spherical particles with large surface area (380 m{sup 2}/g) and pore volume (0.5 cm{sup 3}/g), uniform pore-size distribution (20--60 {angstrom}), and controllable average pore size (35 {angstrom}). These sol-gel-derived granules have excellent mechanical properties with crush strength (>100 N per granule) and attrition resistance (<0.01 wt.%/h), much better than the commercial alumina and zeolite granules. Supported CuO sorbents were prepared on these granules for SO{sub 2} removal applications. The alumina-supported CuO sorbents contain higher loading of well-dispersed CuO and better sulfation properties than similar sorbents reported in the literature.

• OSTI ID: 511978
• Journal Information: AIChE Journal, Journal Name: AIChE Journal Journal Issue: 2 Vol. 43; ISSN 0001-1541; ISSN AICEAC
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
54 ENVIRONMENTAL SCIENCES
ADSORBENTS
AIR POLLUTION CONTROL
ALUMINIUM OXIDES
CATALYST SUPPORTS
COMPRESSION STRENGTH
COPPER OXIDES
MECHANICAL PROPERTIES
PORE STRUCTURE
SOL-GEL PROCESS
SORPTIVE PROPERTIES
SULFUR DIOXIDE
SURFACE AREA
WEAR RESISTANCE