Volume 21, Issue 3 (September 2024)                   IJMSE 2024, 21(3): 1-10 | Back to browse issues page


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A'yuni D Q, Hadiantono H, Velny V, Subagio A, Djaeni M, Mufti N. Efect of Potassium Hydroxide Concentration and Activation Time on Rice Husk-Activated Carbon for Water Vapor Adsorption. IJMSE 2024; 21 (3) :1-10
URL: http://ijmse.iust.ac.ir/article-1-3522-en.html
Abstract:   (6021 Views)
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).
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Type of Study: Research Paper | Subject: Other subjects

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