Title of article :
Efect of Potassium Hydroxide Concentration and Activation Time on Rice Husk-Activated Carbon for Water Vapor Adsorption
Author/Authors :
A yuni ، Dewi Qurrota Department of Chemical Engineering - Faculty of Engineering - Universitas Diponegoro , Hadiantono ، Hadiantono Department of Chemical Engineering - Faculty of Engineering - Universitas Diponegoro , Velny ، Velny Department of Chemical Engineering - Faculty of Engineering - Universitas Diponegoro , Subagio ، Agus Department of Physics - Faculty of Science and Mathematics - Universitas Diponegoro , Djaeni ، Moh. Department of Chemical Engineering - Faculty of Engineering - Universitas Diponegoro , Mufti ، Nandang Department of Physics - Faculty of Mathematics and Science - Universitas Negeri Malang
From page :
82
To page :
91
Abstract :
Rice husk carbon by-product from the industrial combustion is a promising source to produce a vast amount of activated carbon adsorbent. This research prepared rice husk-activated carbon adsorbent by varying the concentration of potassium hydroxide solution (5, 10, 15, 20 % w/v) and activation time (2, 4, 6, 8 hours). Fourier-transform infrared spectral characterization (FTIR) indicated a significant effect before and after activation, especially the presence of hydroxyl groups. Based on the iodine adsorption, the specific surface area of the produced-activated carbon was approximately 615 m2/g. Experimental results showed that increasing potassium hydroxide concentration and activation time increases the water vapor adsorption capacity of the activated carbon. Compared with the rice husk carbon, the KOH-activated carbon enhanced the water vapor adsorption capacity to 931%. In the adsorption observation, changing the temperature from 15 to 27 ℃ caused a higher water vapor uptake onto the activated carbon. Two adsorption kinetics (pseudo-first- and pseudo-second-order models) were used to evaluate the adsorption mechanism. This research found that rice husk-activated carbon performed a higher water vapor adsorption capacity than other adsorbents (silica gel, zeolite, and commercially activated carbon).
Keywords :
activated carbon , adsorption kinetics , desiccant , rice husk , water vapor adsorption
Journal title :
Iranian Journal of Materials Science and Engineering
Journal title :
Iranian Journal of Materials Science and Engineering
Record number :
2781327
Link To Document :
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