Paper Title:
Effects of Processing Factors on Microstructure and Diffusivity of Diethylbenzene Dehydrogenation Catalyst

In this study, different mechanisms of diffusion such as Knudsen and bulk were investigated for diethylbenzene diffusion into a catalyst and it was concluded that the pore sizes should be in the range that permit transitional diffusion (both Knudsen and bulk diffusion). The catalyst grain size can be controlled and varied by different parameters such as speed and time of mixing, type of alkali, temperature and pH. Particle size distribution experiments were conducted for different types of alkali and speed of mixing to characterize the catalyst. The effects of grain size formed during coprecipitation on pore size distribution of the catalyst pellet which affect the effective diffusivity were discussed. Pore size distribution of the model catalyst was obtained and the effective diffusivities were calculated by numerical integration of Johanson-Stewart equation.

Defect and Diffusion Forum (Volumes 297-301)
Edited by
Andreas Öchsner, Graeme E. Murch, Ali Shokuhfar and João M.P.Q. Delgado
M. E. Zeynali, I. Soltani, "Effects of Processing Factors on Microstructure and Diffusivity of Diethylbenzene Dehydrogenation Catalyst", Defect and Diffusion Forum, Vols. 297-301, pp. 233-238, 2010
Online since
April 2010
Authors: Yin Zhang, Yoshiyuki Yokogawa, Tetsuya Kameyama
Abstract:Preparation of apatite ceramics with bimodal pore structure was studied. First fine hydroxyapatite powder was obtained through...
Authors: K. Zhang, Z.F. Song, Y. Yan, Q.M. Chen
Abstract:Colloidal silica particles, Bimodal size distribution, Nucleation Abstract. Colloidal silica particles with bimodal size distribution have...
Authors: Young Hun Kim, Ji Bong Joo, Woo Young Kim, Jeong Jin Lee, Jong Heop Yi
Abstract:AuNP (gold nanoparticle) supported by oxide shows a high reactivity for a PROX (preferential oxiation) reaction at low temperature. Au...
Authors: Fei Chen, Qiang Shen, Lian Meng Zhang
Chapter 2: Engineering Ceramics and Ceramic Composites
Abstract:In this paper, silicon nitride porous ceramics with high porosity and bimodal pore structure were prepared using pressureless sintering at...
Authors: Fei Chen, Qiang Shen, Lian Meng Zhang
I. Infrastructural and Bio-Materials
Abstract:In this Paper, Silicon Nitride Porous Ceramics with Hierarchical Porosity Were Prepared Using Pressureless Sintering and their Mechanical...