物理化学学报Issue(1)：139-143,5.DOI:10.3866/PKU.WHXB201210263
修饰晶种法合成MFI型分子筛膜包覆的活性炭颗粒
Synthesis of MFI-Type Zeolite Membrane Encapsulated Activated Carbon Particles Using a Modified Seeded Method
摘要
Abstract
Zeolite membranes with their advantageous separation and catalytic properties can be coated on traditional catalysts to achieve highly effective perfermance. It is difficult to coat zeolite membranes onto activated carbon (AC) particles, a commonly used catalyst support, because of the hydrophobic and rough surfaces of AC. To overcome these shortcomings, a boehmite gel modified seeded method was developed to synthesize MFI-type zeolite membrane encapsulated AC particles. By using the spray-coating process, the boehmite sol precursor was introduced in a gel layer on the AC surface to provide a smooth surface for seed dispersion and a binder for seed fixation. The obtained seed layer was dense and firm even without calcination. After 6 h rotary hydrothermal synthesis, continuous zeolite membrane encapsulated AC particles were obtained. The synthetic membrane type and the composite material morphologies were elucidated by X-ray diffraction (XRD) and scanning electron microscopy (SEM), respectively. The results indicate that MFI-type zeolite membrane has a thickness of 5μm. For comparison, on AC particles without boehmite gel modification, no continuous membrane forms. Our boehmite gel modified seeded strategy provides an efficient way to prepare zeolite membranes on different inert supports.关键词
晶种法/喷涂/勃姆石溶胶/分子筛膜/活性炭颗粒Key words
Seeded method/Spray-coating/Boehmite sol/Zeolite membrane/Activated carbon particle分类
化学化工引用本文复制引用
金炜阳,程党国,陈丰秋,詹晓力..修饰晶种法合成MFI型分子筛膜包覆的活性炭颗粒[J].物理化学学报,2013,(1):139-143,5.基金项目
国家自然科学基金(21176211)和化学工程联合国家重点实验室开放课题(SKL-ChE-09D02)资助项目 （21176211）
