Discussion about the use of the volume specific surface area (VSSA) as a criterion to identify nanomaterials according to the EU definition. Part two: experimental approach

Nanoscale ◽  
2017 ◽  
Vol 9 (39) ◽  
pp. 14952-14966 ◽  
Author(s):  
André J. Lecloux ◽  
Rambabu Atluri ◽  
Yury V. Kolen'ko ◽  
Francis Leonard Deepak
Keyword(s):  
Experimental Study ◽  
Specific Surface ◽  
European Commission ◽  
Surface Area ◽  
Specific Surface Area ◽  
Experimental Approach ◽  
Commission Recommendation ◽  
The Eu ◽  
Definition Part

The applicability of the volume specific surface area (VSSA) concept to identify nanomaterials according to the European Commission Recommendation is demonstrated on the basis of an experimental study.

scholarly journals Experimental study on demulsification speed of emulsified asphalt based on equivalent surface area principle

2020 ◽  
Vol 198 ◽  
pp. 01044
Author(s):  
Yan Li ◽  
Hao Liang ◽  
Jiangtao Lin ◽  
Liang Fan ◽  
Yongzhen Li ◽  
...  
Keyword(s):  
Experimental Study ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Volume Ratio ◽  
Critical Volume ◽  
Actual Measurement ◽  
Speed Test ◽  
Emulsified Asphalt

In order to simplify the demulsification speed test of emulsified asphalt, rapid-breaking, medium-breaking and slow-breaking emulsified asphalt as well as different aggregates were selected for the demulsification speed test. The specific surface area of each single grade was determined by the actual measurement, and the equivalent aggregate was collected according to the principle of equivalent surface area. The results show that the equivalent aggregate can be composed by the assembling of gradations smaller than 0.075mm and one or two bigger gradations. Therefore, the types of gradation in the equivalent aggregate will be reduced by one-half compared with that in the standard aggregate. The surface area of the equivalent aggregate is the same as that of the standard aggregate, and under a certain volume ratio, the demulsification rate determined by equivalent aggregate or standard aggregate is the same.There is also a critical volume ratio existing for the equivalent aggregate, If the critical volume ratio is exceeded, the demulsification rate determined by the equivalent aggregate will be greatly different from that determined by the standard aggregate. It is also found that the volume ratio turns to 1 without any changes when the proportion of gradation smaller than 0.075mm reaches 25%-30%.

Fuels Desulphurisation by Adsorbtion on Fe / Bentonite

2017 ◽  
Vol 68 (3) ◽  
pp. 483-486
Author(s):  
Constantin Sorin Ion ◽  
Mihaela Bombos ◽  
Gabriel Vasilievici ◽  
Dorin Bombos
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Pore Volume ◽  
Pore Diameter ◽  
Adsorption Process ◽  
Continuous System ◽  
Gas Oil ◽  
Average Pore ◽  
Atmospheric Distillation

Desulfurisation of atmospheric distillation gasoline and gas oil was performed by adsorption process on Fe/ bentonite. The adsorbent was characterized by determining the adsorption isotherms, specific surface area, pore volume and average pore diameter. Adsorption experiments of atmospheric distillation gasoline and gas oil were performed in continuous system at 280�320oC, 5 atm and volume hourly space velocities of 1�2 h-1. The efficiency of adsorption on Fe / bentonite was better at desulphurisation of gasoline versus gas oil.

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