Effect of the carbonization and activation processes on the adsorption capacity of rice husk activated carbon

Hoa Thai Ma, Van Thi Thanh Ho, Nguyen Bao Pham, Dat Chi Nguyen, Kieu Thi Diem Vo, Hung Cam Ly, Tuan Dinh Phan
Author affiliations

Authors

  • Hoa Thai Ma Ho Chi Minh City University of Technology - Vietnam National University, 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Viet Nam
  • Van Thi Thanh Ho Ho Chi Minh City University of Natural Resources and Environment, 236B Le Van Sy street, District Tan Binh, Ho Chi Minh City, Viet Nam
  • Nguyen Bao Pham Tra Vinh University, 126 Nguyen Thien Thanh Street, Ward 5, Tra Vinh City, Viet Nam
  • Dat Chi Nguyen Ho Chi Minh City University of Technology - Vietnam National University, 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Viet Nam
  • Kieu Thi Diem Vo Dong Nai Technology University, Nguyen Khuyen Street, Ward Trang Dai, Bien Hoa city, Viet Nam
  • Hung Cam Ly Ho Chi Minh City University of Natural Resources and Environment, 236B Le Van Sy street, District Tan Binh, Ho Chi Minh City, Viet Nam
  • Tuan Dinh Phan Ho Chi Minh City University of Natural Resources and Environment, 236B Le Van Sy street, District Tan Binh, Ho Chi Minh City, Viet Nam

DOI:

https://doi.org/10.15625/2525-2518/55/4/9124

Keywords:

rice husk, carbonization, activation, activated carbon

Abstract

In this study, rice husk was used as a precursor to prepare activated carbon using steam as a physical activation agent. Steam for activation can be used to activate almost all raw materials. A variety of methods have been developed but all of these share the same basic principle of initial carbonization followed by an activation step with steam. The study also investigates the effects of preparation parameters on the surface characteristics of the carbon. These parameters include the range of temperature and time in the carbonization and activation. The initial carbonization, done at temperatures up to 500°C in 60 min, is a highly exothermic process where the temperature is strictly controlled. The creation of the internal surface is done during the activation step with steam at temperatures 800°C in 30 min., for which the BET surface area is up to 710.8m2/g. Besides, the iodine and methylene blue adsorption capacity of rice-husk carbon are the best that reach 865.98±6.5 and 217.86±1.0 (mg/g), respectively. The entire synthetic procedure was simple, environmental-friendly and economical-effectively. The application prospect of the activated carbon prepared in this work was much more promising due to its high adsorptive capacity.

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Published

11-08-2017

How to Cite

[1]
H. T. Ma, “Effect of the carbonization and activation processes on the adsorption capacity of rice husk activated carbon”, Vietnam J. Sci. Technol., vol. 55, no. 4, pp. 494–402, Aug. 2017.

Issue

Section

Materials