Title: Morphology and surface characteristics of bamboo activated carbon chemically activated under different immersion time

Authors: Made Sucipta; Dewa Ngakan Ketut Putra Negara; Tjokorda Gde Tirta Nindhia; I. Wayan Surata

Addresses: Mechanical Engineering Department, Udayana University, Campus Bukit Jimbaran, Badung, Denpasar, Bali (80362), Indonesia ' Mechanical Engineering Department, Udayana University, Campus Bukit Jimbaran, Badung, Denpasar, Bali (80362), Indonesia ' Mechanical Engineering Department, Udayana University, Campus Bukit Jimbaran, Badung, Denpasar, Bali (80362), Indonesia ' Mechanical Engineering Department, Udayana University, Campus Bukit Jimbaran, Badung, Denpasar, Bali (80362), Indonesia

Abstract: Activated carbons (ACs) have been manufactured from tabah bamboo (Gigantochloc nigrociliata) by carbonisation at 800°C for 1.5 hours and chemically activated. Char powdered with maximum mesh 250 µm was mixed with H₃PO₄ with impregnation ratio 1:1 and heated at 700°C for 1.5 hours under 100 mL/min N₂ flow. ACs produced at immersion time 6, 12, and 24 hours were named AC6, AC12 and AC24, respectively. SEM observation and Pore Size Distribution exhibited that ACs produced have micropores structure. At low relative pressure, the higher the immersion time the lower micropore area and microvolume were obtained. The highest total surface area, micro surface area, and microvolume were obtained at AC6. Type IV appeared at AC24 indicating not highly micropore, indeed mesopore structure, meanwhile Type I adsorption isotherm occurred at AC6 and AC12 indicating high micropore structure. These indicate the chemical activation process can be used to wider application of activated carbon.

Keywords: activated carbon; chemical activation; morphology; surface; immersion time.

DOI: 10.1504/IJGEI.2021.115139

International Journal of Global Energy Issues, 2021 Vol.43 No.2/3, pp.135 - 146

Received: 17 Aug 2019
Accepted: 26 Apr 2020
Published online: 20 May 2021 *

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