REG: Acquisition of Microbalance for Sorption Studies on High Surface Area Solids

REG：获取微量天平用于高表面积固体的吸附研究

• 批准号: 0079451
• 负责人: Michael Tsapatsis
• 金额: $ 6.2万
• 依托单位: University of Massachusetts Amherst
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-11-01 至 2001-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0079451&HistoricalAwards=false
• 关键词: REG; Acquisition; Microbalance; Sorption; Studies

ABSTRACTCTS-0079451Michael TsapatsisThe Department of Chemical Engineering at the University of Massachusetts Amherst will purchase a gravimetric system for sorption studies in porous solids. The system that will be acquired and assembled is built around an in situ gravimetric adsorption system designed to operate from vacuum (10-6 torr) to 10 bar and from -195 C to 500 C. This system measures the weight of a powdered sample in contact with a flowing gas or mixture of gases. The adsorption, desorption orreaction on the solid is followed by the change of mass in time. On-line mass spectrometry or an on-line infrared detection system monitors the compositions of the gases passing over the sample allowing competitive adsorption studies. A common theme in the current projects of the investigators to be supported under this effort is the adsorption and transport properties of gases and vapors in microporous and mesoporous media. A wide range of activities is centered in this theme ranging from fundamental studies of adsorption equilibrium in porous media to practical applications of these materials in the forms of powders, monoliths and membranes for gas and organic vapor separations. Examples of activities include:Development of zeolites and other molecular sieve adsorbents andmembranesUnderstanding hysteresis in adsorption isothermsAdsorbent structure modification during adsorptionPhase transitions in porous mediaDevelopment of new techniques for microstructural characterization offabricated porous mediaThe research to be carried out using the system is all currently funded from Federal sources and grants from private research foundations and US industry (NSF, ATP, NASA, DOE, The David and Lucile Packard Foundation, The Camille and Henry Dreyfus Foundation, Engelhard Co.). Five faculty members and their research groups currently consisting of over twenty-five graduate students and post-doctoral workers and more than ten undergraduate students will use the equipment requested in this proposal.

马萨诸塞州阿默斯特大学化学工程系将购买一套用于多孔固体吸附研究的重量分析系统。将获得和组装的系统是围绕原位重力吸附系统构建的，该系统设计为在真空（10-6 ℃）至10巴和-195 ℃至500 ℃下操作。该系统测量与流动气体或气体混合物接触的粉末样品的重量。吸附、脱附或反应的发生都伴随着质量随时间的变化。在线质谱或在线红外检测系统监测通过样品的气体的组成，允许竞争性吸附研究。在这项工作下，研究人员目前的项目中的一个共同主题是气体和蒸汽在微孔和中孔介质中的吸附和传输特性。广泛的活动集中在这一主题，从多孔介质中吸附平衡的基础研究到这些材料以粉末，整料和膜形式用于气体和有机蒸气分离的实际应用。活动的例子包括：沸石和其他分子筛吸附剂和膜的开发了解吸附等温线的滞后现象吸附过程中的吸附剂结构改性多孔介质中的相变开发制造多孔介质微观结构表征的新技术使用该系统进行的研究目前全部由联邦来源和私人研究基金会和美国工业界（NSF、ATP、NASA、DOE、The大卫和Lucile Packard Foundation、The Camille和亨利德雷福斯Foundation、Engelhard Co.）的赠款资助。五名教师及其研究小组目前由超过二十五名研究生和博士后工作者和十多名本科生组成，将使用本提案中要求的设备。