Details

Autor(en) / Beteiligte

• Yek, Peter Nai Yuh
• Liew, Rock Keey
• Osman, Mohammad Shahril
• Lee, Chern Leing
• Chuah, Joon Huang
• Park, Young-Kwon
• Lam, Su Shiung

Titel

Microwave steam activation, an innovative pyrolysis approach to convert waste palm shell into highly microporous activated carbon

Ist Teil von

• Journal of environmental management, 2019-04, Vol.236, p.245-253

Ort / Verlag

England: Elsevier Ltd

Erscheinungsjahr

2019

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Microwave-steam activation (MSA), an innovative pyrolysis approach combining the use of microwave heating and steam activation, was investigated for its potential production of high grade activated carbon (AC) from waste palm shell (WPS) for methylene blue removal. MSA was performed via pyrolytic carbonization of WPS to produce biochar as the first step followed by steam activation of the biochar using microwave heating to form AC. Optimum yield and adsorption efficiency of methylene blue were obtained using response surface methodology involving several key process parameters. The resulting AC was characterized for its porous characteristics, surface morphology, proximate analysis and elemental compositions. MSA provided a high activation temperature above 500 °C with short process time of 15 min and rapid heating rate (≤150 °C/min). The results from optimization showed that one gram of AC produced from steam activation under 10 min of microwave heating at 550 °C can remove up to 38.5 mg of methylene blue. The AC showed a high and uniform surface porosity consisting high fixed carbon (73 wt%), micropore and BET surface area of 763.1 and 570.8 m2/g respectively, hence suggesting the great potential of MSA as a promising approach to produce high grade adsorbent for dye removal. •Microporous activated carbon (AC) is made via microwave steam activation (MSA).•MSA shows short process time, fast heating rate, low temperature to produce AC.•Optimal yield and adsorption efficiency of AC at 550 °C and 10 min of heating.•85 wt% yield with 38.5 mg of dye/g of AC of adsorption efficiency were obtained.•Low production cost of AC (RM 2.90/kg) suggests the economical feasibility of MSA.