催化作用
煅烧
氧化物
比表面积
材料科学
多孔性
铜
作者
Zhong-Min Wang,Y.S. Lin
标识
DOI:10.1006/jcat.1997.1913
摘要
Abstract A modified oil-drop sol-gel process is reported for synthesis of mesoporous spherical γ-Al 2 O 3 granular particles and CuO-coated γ-Al 2 O 3 granular particles of 1–3 mm in diameter. Various parameters affecting the granulation process were studied, and the optimum values of these parameters were identified for reproducible synthesis of the alumina granular particles. Under the optimum synthesis conditions, CuO-coated γ-Al 2 O 3 granular particles could be synthesized directly from the pseudo-boehmite sol doped with Cu(NO 3 ) 2 by a solution–sol mixing method. The CuO-coated γ-Al 2 O 3 granular particles prepared by the solution–sol mixing coating method exhibit better mechanical and sulfation properties than the similar sorbents prepared by the wet-impregnation method. The sol-gel derived granular CuO-coated γ-Al 2 O 3 sorbents prepared by both coating methods have the same microstructure at lower CuO loading.
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