Experimental and statistical assessments of the mechanical strength reliability of gamma alumina catalyst supports  

作　　者：Abdolreza Samimi Mozhgan Zakeri Basir Maleki Davod Mohebbi-Kalhori 

机构地区：[1]Department of Chemical Engineering,University of Sistan and Baluchestan

出　　处：《Particuology》2015年第4期74-81,共8页颗粒学报（英文版）

摘　　要：The mechanical strength of solid catalysts is considered an important factor in terms of ensuring the reliable performance of industrial reactors. In this work, a pelletizing method was used to form gamma alumina support for catalysts. Response surface methodology （RSM） was employed to analyze and model the effects of various manufacturing parameters on the crushing strength of the supports. These parameters were binder concentration, compaction pressure, calcination temperature, and drying mode. The suggested model was verified by applying an analysis of variance to assess its validity with regard to crushing strength. The mechanical reliability of various supports was also determined by calculating their Weibull modulus values through linear regression of the Weibull equation. The material with the highest mechanical strength reliability will have both a high mean crushing strength and a high Weibull modulus, and the best values obtained for a support in this work were 70.7 MPa and 6.63, respectively. The conditions used to form this sample were： 20mass% binder concentration, 861 MPa compaction pressure, 466 ℃ calcination temperature, and gentle drying.The mechanical strength of solid catalysts is considered an important factor in terms of ensuring the reliable performance of industrial reactors. In this work, a pelletizing method was used to form gamma alumina support for catalysts. Response surface methodology （RSM） was employed to analyze and model the effects of various manufacturing parameters on the crushing strength of the supports. These parameters were binder concentration, compaction pressure, calcination temperature, and drying mode. The suggested model was verified by applying an analysis of variance to assess its validity with regard to crushing strength. The mechanical reliability of various supports was also determined by calculating their Weibull modulus values through linear regression of the Weibull equation. The material with the highest mechanical strength reliability will have both a high mean crushing strength and a high Weibull modulus, and the best values obtained for a support in this work were 70.7 MPa and 6.63, respectively. The conditions used to form this sample were： 20mass% binder concentration, 861 MPa compaction pressure, 466 ℃ calcination temperature, and gentle drying.

关 键 词：Crushing strength Brittle material Weibull modulus PELLETIZING Response surface methodology 

分 类 号：O643.36[理学—物理化学] TH114[理学—化学]