scholarly journals The Role of Carbon Electrodes Pore Size Distribution on the Formation of the Cathode–Electrolyte Interphase in Lithium–Sulfur Batteries

2020 ◽  
Author(s):  
Christian Kensy ◽  
Desirée Leistenschneider ◽  
Shuwen Wang ◽  
Hideki Tanaka ◽  
Susanne Dörfler ◽  
...  
Keyword(s):  
Pore Size Distribution ◽  
Pore Size ◽  
Size Distribution ◽  
Carbon Electrodes ◽  
Lithium Sulfur Batteries ◽  
Lithium Sulfur

scholarly journals “Water-in-salt” electrolyte enhanced high voltage aqueous supercapacitor with carbon electrodes derived from biomass waste-ground grain hulls

RSC Advances ◽  
2020 ◽  
Vol 10 (58) ◽  
pp. 35545-35556
Author(s):  
Mingjun Pang ◽  
Shang Jiang ◽  
Jianguo Zhao ◽  
Sufang Zhang ◽  
Runwei Wang ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Specific Surface ◽  
Pore Size Distribution ◽  
Pore Size ◽  
Size Distribution ◽  
High Voltage ◽  
High Specific Surface Area ◽  
Carbon Electrodes ◽  
Koh Activation ◽  
Biomass Waste

To design high specific surface area and optimize the pore size distribution of materials, we employ a combination of carbonization and KOH activation to prepare activated carbon derived from ground grain hulls.

A Realistic Method to Describe the Role of Diffusion in Catalyst Design

2009 ◽  
Vol 294 ◽  
pp. 65-76
Author(s):  
Mohammad Ebrahim Zeynali
Keyword(s):  
Grain Size ◽  
Pore Size Distribution ◽  
Pore Size ◽  
Size Distribution ◽  
Nitrate Solution ◽  
Effective Diffusivity ◽  
Catalyst Design ◽  
Internal Surface Area ◽  
Co Precipitation

The dehydrogenation of diethylbenzene to divinylbenzene is a catalytic reaction. The catalyst for the dehydrogenation was prepared by co-precipitation of iron and chromium hydroxide from nitrate solution, followed by doping with potassium carbonate and drying. To make available the internal surface area of the catalyst for the reactant, the pores must be of the proper sizes to allow the reactant to diffuse and penetrate inside the catalyst pellets. The prepared catalyst was considered as a model for investigating the role of diffusion in catalyst design. In this study, different mechanisms of diffusion, such as Knudsen and bulk, were investigated for the case of diethylbenzene diffusion into the catalyst and it was concluded that the pore sizes should be in a range that permits transitional diffusion (both Knudsen and bulk diffusion). The catalyst grain size can be controlled and varied by acting on parameters such as the speed and time of mixing, type of alkali, temperature and pH. Particle size distribution experiments were conducted for different types of alkali and speeds of mixing in order to characterize the catalyst. The effects of the grain size, formed during co-precipitation, upon the pore size distribution of the catalyst pellet which affects the effective diffusivity were discussed. The pore size distribution of the model catalyst was obtained and the effective diffusivities were calculated by numerical integration of the Johanson-Stewart equation.

scholarly journals Efficient removal of three dyes using porous covalent triazine frameworks: adsorption mechanism and role of pore distribution

2020 ◽  
Vol 82 (12) ◽  
pp. 3023-3031
Author(s):  
Fengxia An ◽  
Jingliang Liu ◽  
Zhaoyi Xu ◽  
Shourong Zheng
Keyword(s):  
Pore Size Distribution ◽  
Pore Size ◽  
Size Distribution ◽  
Ph Dependence ◽  
Batch Adsorption ◽  
Spectroscopic Techniques ◽  
Adsorption Mechanisms ◽  
Bonding Interaction ◽  
Adsorption Affinity

Abstract Dyes are widely used in production and life. In this study, porous covalent triazine frameworks (CTFs) were synthesized and the adsorption behavior for three dyes was investigated by batch adsorption experiments. CTFs were characterized by various spectroscopic techniques for structure, porosity and surface properties. Several possible adsorption mechanisms were proposed including pore-filling, electrostatic attraction and hydrogen bonding interaction with the triazine structure of CTFs. The mechanisms were further verified by the pore size distribution and pH dependence. Additionally, CTFDCBP displayed stronger adsorption affinity and faster adsorption kinetics for dyes, because of the wide pore size distribution. This study provides a new insight into the mesoporous CTFs, which exhibit great potential as an effective adsorbent for dye removal.

The role of beaded activated carbon’s pore size distribution on heel formation during cyclic adsorption/desorption of organic vapors

2016 ◽  
Vol 315 ◽  
pp. 42-51 ◽  
Author(s):  
Masoud Jahandar Lashaki ◽  
John D. Atkinson ◽  
Zaher Hashisho ◽  
John H. Phillips ◽  
James E. Anderson ◽  
...  
Keyword(s):  
Pore Size Distribution ◽  
Pore Size ◽  
Size Distribution ◽  
Organic Vapors ◽  
Cyclic Adsorption ◽  
Adsorption Desorption
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