Effects of pyrolysis conditions on the porous structure development of date pits activated carbon

Bouchelta, Chafia; Medjram, Mohamed Salah; Marsa, Zoubida; Chekkat, Fatiha Ahmed; Ramdane, Nassima; Bellat, Jean‐Pierre

doi:10.1016/j.jaap.2011.12.014

Cited by 110 publications

(67 citation statements)

References 32 publications

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“…They concluded that temperature had the most significant effect on final porous structure of charred carbon. Carbonization of Algerian date pits was similarly studied by Bouchelta et al (2012). The studied parameters included temperature, heating rate, reaction time and nitrogen gas flow rate.…”

Section: Effects Of Carbonization Parameters On Final Porous Carbonmentioning

confidence: 99%

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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Section: Effects Of Carbonization Parameters On Final Porous Carbonmentioning

confidence: 99%

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

2013

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“…nitrogen flow and 10°C/min. heating rate 11 . The pyrolysed dates pits and stems are physically activated in an inert atmosphere N 2 /H 2 O, at different temperatures (700, 800, and 900°C).…”

Section: Preparation Of the Activated Carbonmentioning

confidence: 99%

“…The physical activation process is generally conducted in two stages: decomposing the hydrogenated matter by pyrolysis at high temperature and activation under gas flow in order to open the porosity. For mild oxidation of the carbonaceous material In this process, steam nitrogen, carbon dioxide or both of them are 11 . One of the most well-established and effective techniques for the removal of 2,4-D and pesticides from water is adsorption on activated carbons 12,13,14 .…”

Section: Introductionmentioning

confidence: 99%

Activated Carbon Supported Cobalt as Efficiency Adsorbent: Application Chemical Agricultural pollutant 2,4-D Herbicide Removal from Aqueous Solution

Boughaita¹,

Bouchelta²,

Medjram³

et al. 2017

Orient. J. Chem

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In this work, an activated carbon derived from date pits and stems (DPSAC) was prepared by physical activation under N 2 and used as a support of cobalt transition metals, by wetness impregnation at different Co content and different calcination temperatures. The optimal operator conditions were 20 wt% cobalt impregnation ratio and 300°C calcination temperature. The grafted material was characterized by methods: thermo gravimetric analysis (TGA), scanning electron microscopy (SEM), Fourier transform of infrared spectroscopy (FTIR). The activated carbon (DPSAC) and grafted activated carbon (Co/DPSAC) were realized on adsorption of 2,4-dichlorophenoxyacetic acid (2,4-D) from aqueous solution , it was found that the cobalt-grafted dates pits and stems activated carbon promoted the 2,4-D adsorption kinetics, The Langmuir and Freundlich isotherms models were applied for the adsorption results. The rate of adsorption of 2,4-D onto (DPSAC) and (Co/DPSAC) were estimated and described using a pseudo-second order model.

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“…Therefore, other alternative precursors which are inexpensive and abundantly available for activated carbon production have been investigated. From the literature, oil palm stone [4], pinang frond [5], banana stalk [6], bamboo species [7], coffee husk [8], date pits [9], oil palm shell [10] and Parkinsoniaaculeatea wood [11] have all been used to prepare activated carbon.…”

Section: Introductionmentioning

confidence: 99%

“…The advantages of physical activation are the possibility of developing a structure with more pores and large active area [9] and having less effect in terms of the secondary pollution problem during the disposal stage [12]. The most important characteristic of an activated carbon is its adsorption capacity or uptake, which is highly influenced by the preparation conditions of activated carbon, such as activation time.…”

Section: Introductionmentioning

confidence: 99%

Effect of Activation Time on the Pinang Frond based Activated Carbon for Remazol Brilliant Blue R Removal

Ahmad¹,

Herawan²,

Yusof³

2014

J MECH ENG SCI

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Activated carbons are regularly used for dye wastewater treatment. They can be produced from various organic materials which have a high level of carbon content. In this study, Pinang frond based activated carbon (PFAC) was produced by using a physical activation process to study the effect of different activation times in the range of 1-7 hours. The optimum PFAC sample was found with an activation time of 3 hours, which gives the highest BET surface area and pore volume of 958.23 m 2 /g and 0.5469 mL/g, respectively. This sample shows well-developed pore structure with a high fixed carbon content of 79.74%. The removal of 87.6% of Remazol Brilliant Blue R (RBBR) was achieved for a sample with initial RBBR concentration of 50 mg/L, and 40.8% was achieved with 500 mg/L. The results indicated that the PFAC is very effective for RBBR adsorption from aqueous solution.

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Effects of pyrolysis conditions on the porous structure development of date pits activated carbon

Cited by 110 publications

References 32 publications

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

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

Activated Carbon Supported Cobalt as Efficiency Adsorbent: Application Chemical Agricultural pollutant 2,4-D Herbicide Removal from Aqueous Solution

Effect of Activation Time on the Pinang Frond based Activated Carbon for Remazol Brilliant Blue R Removal

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