Influence of pyrolysis conditions on pore development of oil-palm-shell activated carbons

Lua, Aik Chong; Lau, Fong Yow; Guo, Jia

doi:10.1016/j.jaap.2005.08.001

Cited by 171 publications

(86 citation statements)

References 9 publications

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“…The increases of average pore diameter of the activated carbons agreed well with the deduction of the percentage of micropore volume. Lua et al [25] reported the same trends of porosity development for activated carbon derived from carbonized oil-palm shell using CO 2 activation. In accordance to the classification adopted by the International Union of Pure and Applied Chemistry (IUPAC) [26], adsorbent pores are classified into three groups: micropores (size <2 nm), mesopores (2-50 nm), and macropores (>50 nm).…”

Section: Samplementioning

confidence: 64%

Effects of CO2 activation on porous structures of coconut shell-based activated carbons

Guo

Peng

et al. 2009

Applied Surface Science

245

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Section: Samplementioning

confidence: 64%

Effects of CO2 activation on porous structures of coconut shell-based activated carbons

Guo

Peng

et al. 2009

Applied Surface Science

245

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“…Barbooti et al (2004) also investigated the effects of pyrolysis temperature (400-460°C) and nitrogen gas flow rate (0.2-0.5 m 3 /h) on the carbon yield produced by carbonization of scrap tires. Lua et al (2006) reported a similar research on the influence of pyrolysis conditions on pore development of oil-palm shells' activated carbons. Their previous analytical method of one-factor-at-a-time was similarly applied.…”

Section: Effects Of Carbonization Parameters On Final Porous Carbonmentioning

confidence: 86%

Effects of pyrolysis conditions on the porous structure construction of mesoporous charred carbon from used cigarette filters

2013

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One-step pyrolysis was applied to synthesize mesoporous charred carbon from used cigarette filters. Proximate analysis suggested that cigarette filters are decent carbon precursors due to their moderate carbon (around 11 %) and low ash (around 0.1 %) contents. To investigate the effects of pyrolysis parameters on porous surface area, a full factorial design of experiment including heating rate, soaking time and pyrolysis temperature was used with each factor at three levels. The analysis of variance revealed that the temperature and heating rate had the most significant effects on total surface area of the synthesized carbon. Response surface model (RSM) was applied to best fit a surface through the experimental data. It was seen that the quadratic RSM model with a reasonable R 2 value of 63 % was the best developed model. The maximum BET surface area (597 m 2 /g) was reached at a pyrolysis temperature of 900°C when the precursor was heated at 5°C/min and hold at this temperature for 3 h. The produced N 2 adsorption-desorption isotherm showed a certain degree of mesoporosity in the charred carbon with an average pore size of 3.32 nm calculated by BarrettJoyner-Halenda method. Scanning electron microscopy also showed the presence of macroporosity on the charred carbon surface. Fourier transform infrared spectroscopy revealed the presence of acidic surface functional groups such as carboxyl and phenol which were accordingly confirmed by Boehm titration. In addition, Boehm titration showed that the produced carbon's surface was more acidic than basic in nature.

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“…Pyrolysis temperature have significant effect on the characteristics of the activated carbons, [28]. During activation time, monitoring of process temperature was realized.…”

Section: Temperature Profilesmentioning

confidence: 99%

Preparation of activated carbon from babassu endocarpunder microwave radiation by physical activation

Salgado

Abioye

Junoh

et al. 2018

IOP Conf. Ser.: Earth Environ. Sci.

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Abstract. Babassu endocarp were used to prepare activated carbons by physical activation via microwave radiation for the first time. The pyrolysis temperature was 600°C and the derived biochar were activated in CO 2atmosphere at 700, 750 and 800°C for 30 min. The material was characterized using scanning electron microscopy (SEM). The porous properties of the activated carbons obtained including the Brunauer-Emmett-Teller (BET) surface area, pore volume, and average pore diameter were determined by nitrogen adsorption isotherms at 77.32 K. The experimental results showed that most pores occurred during the activation predominantly as micropores. Endocarp babassu can be used as precursor to produce activated carbon with a rather well-developed porosity by pyrolysis and physical activation by two-steps with CO2 activation via microwaves radiation. The activated carbon, with a low production cost, could be suitable for applications in gaseous pollutant adsorption, adsorb iodine, methylene blue, and residual chlorine.

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Influence of pyrolysis conditions on pore development of oil-palm-shell activated carbons

Cited by 171 publications

References 9 publications

Effects of CO2 activation on porous structures of coconut shell-based activated carbons

Effects of CO2 activation on porous structures of coconut shell-based activated carbons

Effects of pyrolysis conditions on the porous structure construction of mesoporous charred carbon from used cigarette filters

Preparation of activated carbon from babassu endocarpunder microwave radiation by physical activation

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