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- 검색키워드
- 저자 : Ahmed Al Shoaibi (검색결과 2 건)
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Surface functionalization methodologies on activated carbons and their benzene adsorption
Prabhu Azhagapillai,Ahmed Al Shoaibi,Srinivasakannan Chandrasekar 한국탄소학회 2021 Carbon Letters Vol.31 No.3
The present work reports the effect of different functionalization methodologies on surface modification of porous carbon and its efficacy for benzene adsorption. The virgin and surface-modified adsorbents were characterized by FTIR, N2 sorption analysis, SEM, and Boehm titration. The adsorption isotherms were measured at different temperatures using a highly sensitive magnetic suspension microbalance. At lower benzene concentration, the virgin carbon was found to possess reasonable adsorption capacity, while at higher benzene concentration, the surface-modified carbon tends to perform better. The maximum benzene adsorption capacity at 25 °C and vapor pressure of 90 mbar is as follows: 467 mg/g (NORIT-AC), 227 mg/g (AC-APS (1 M)), 388 mg/g (Norit-AC-HT), 492 mg/g (AC-HNO3), and 531 mg/g (AC-H2SO4).
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Gas-phase mercury removal through sulfur impregnated porous carbon
K. Suresh Kumar Reddy,Ahmed Al Shoaibi,C. Srinivasakannan 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.5
Gas phase mercury removal is a vital unit operation in gas processing industries. The present work attempts to prepare a sulfur impregnated carbon at optimized experimental conditions and compares its elemental adsorption capacity with the number of commercially available carbon based adsorbents. The effect of adsorption temperature on mercury adsorption capacity has been estimated for the prepared sulfur impregnated carbon. The adsorption capacity was found to increase with increase in adsorption temperature owing to the chemisorption nature of the adsorption. The adsorption isotherms were generated at three different temperatures and were found to close adhere to the Langmuir Isotherm model. The adsorption capacity was found to increase until 140℃, while decrease beyond, which was attributed to the softening and agglomeration of sulfur. The maximum adsorption capacity of 4325 mg/g was observed at a temperature of 140℃. A comparison of the relative adsorption capacity of various adsorbent at 30℃, revealed the adsorption capacity of the sulfur impregnated carbon prepared in the present work much higher than the commercially available carbons. The high adsorption capacities with simple preparation techniques favor the commercial mercury adoption process.
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