The effect of carbonization temperature, carbonization time and impregnation ratio on the properties of activated carbon produced from Arundo donax

Üner, Osman; Bayrak, Yüksel

doi:10.1016/j.micromeso.2018.04.037

Cited by 109 publications

(30 citation statements)

References 55 publications

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“…This result can be attributed to the activator phosphoric acid, which greatly reduced the required temperature for carbonization (Kwiatkowski et al, 2017) and thus facilitated the preparation of activated carbon with a developed pore structure at a lower temperature (Gao et al, 2016). During carbonization, the micropore structure of the materials was formed at 150 C. The mesoporous structure was mainly formed at 200-450 C and still formed at temperatures higher than 450 C (Demiral and Gu¨ng€ or, 2016;€ Uner and Bayrak, 2018). However, when the peanut shell was carbonized at extremely high temperatures, its cellulose became carbonized and nodular, which was not conducive for the formation of the pore structure of the activated carbon (Fu et al, 2017;Pallare´s et al, 2018).…”

Section: Adsorption Experimentsmentioning

confidence: 99%

Synthesis of activated carbon from peanut shell as dye adsorbents for wastewater treatment

Chen

et al. 2018

Adsorption Science & Technology

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In this study, the adsorption capacities of peanut shell activated carbon samples prepared using three types of peanut shell as raw material were compared. The effects of activation state, carbonization temperature, carbonization time, adsorption time during decolorization, and dosage on the performance of the peanut shell activated carbon samples were investigated. The performance of the modified peanut shell (activated carbon) on the decolorization of reactive brilliant blue X-BR and the adsorption kinetics were evaluated systematically. Among the three types of peanut shell activated carbon, the activated carbon that was first activated by phosphoric acid and then carbonized at 450 C for 3 h displayed the best performance, with an optimum dosage of 4 g l À1 and an optimum adsorption time of 2 h. The pseudo-second-order kinetics equation and the intraparticle diffusion equation could well describe the adsorption behavior of the activated carbon prepared by phosphoric acid activation. Intraparticle diffusion was not the only factor affecting the adsorption rate of the activated carbon on reactive brilliant blue X-BR.

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Section: Adsorption Experimentsmentioning

confidence: 99%

Synthesis of activated carbon from peanut shell as dye adsorbents for wastewater treatment

Chen

et al. 2018

Adsorption Science & Technology

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“…, KOH : C. The type of the pores to be produced depends on different activation conditions whereby activation ratio is very potential for micropore production when chemical activation is used [30]. Figure 6 displays the effect of the KOH : C ratio on the removal efficiency of SpLAC, whereby three activated carbon samples with different activation ratios were studied.…”

Section: Effect Of Activation Ratiomentioning

confidence: 99%

Performance of Sweet Potato’s Leaf-Derived Activated Carbon for Hydrogen Sulphide Removal from Biogas

2020

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In this study, sweet potato leaf activated carbon (SpLAC) was prepared by the chemical activation method using KOH and applied as an adsorbent for H2S removal from biogas. The study focused on the understanding of the effect of carbonization temperature (Tc), varying KOH : C activation ratio, flow rate (FR) of biogas, and mass of SpLAC on sample adsorption capacity. The BET analysis was performed for both fresh and spent activated carbons as well as for carbonized samples, which were not activated; also, the activated carbon was characterized by XRF and CHNS techniques. The results showed that removal efficiency (RE) of the SpLAC increased with increase carbonization temperature from 600 to 800°C and the mass of sorbent from 0.4 g to 1.0 g. The optimal test conditions were determined: 1.0 g of sorbent with a KOH : C ratio of 1 : 1, Tc=800°C, and FR=0.02 m3/h which resulted in a sorption capacity of about 3.7 g S/100 g of the SpLAC. Our findings corroborated that H2S removal was contributed not only by the adsorption process with the pore available but also by the presence of iron in the sample that reacted with H2S. Therefore, upon successful H2S sorption, SpLAC is suggested as a viable adsorbent for H2S removal from biogas.

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“…Briefly, 8 g of prepared Teff straw was impregnated with 30 wt% H 3 PO 4 solution and stirred at room temperature for 12 h. After the supernatant was removed, the remaining wet solid precursors were directly transferred to a tubular furnace to be pyrolyzed at 450 °C for 3 h in the presence of oxygen. This is based on a review of literature that reported that the application of low pyrolysis temperature [23] and slow pyrolysis process [24] obtained a higher char yield having higher pore volume. The activated char was taken out after the heat was cooled to room temperature and then washed by distilled water till the effluent becomes neutral pH.…”

Section: Adsorbents Preparationmentioning

confidence: 99%

Preparation, characterization and cost analysis of activated biochar and hydrochar derived from agricultural waste: a comparative study

et al. 2019

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Utilization of low-cost, abundant and biomaterials is highly recommended for sustainable environment protection. This study presents a comparative analysis on the preparation, characterization and cost analysis of the novel activated biochar (BTS) and activated hydrochar (HTS). Teff (Eragrostis tef) straw was used as a precursor for producing BTS and HTS through pyrolysis and hydrothermal carbonization process, respectively. Both chars were further activated using 30 wt% H 3 PO 4 for 3 h activation time. The physicochemical properties of both chars were compared by different characterization techniques including BET, FTIR, XRD, SEM, and TGA. Briefly, BTS exhibited heterogeneous surface structures and comparatively larger specific surface area (627.7 m 2 /g) than that of HTS (43.8 m 2 /g) with the smooth coalesced carbon layer and dull surface edges. The XRD analysis revealed the amorphous character of HTS which is dominantly composed of AlPO 4 , whilst indicating BTS to be the crystalline structure with the very trivial amount of impurities. The oxygen-containing functional groups increased for HTS in comparison to BTS. Thermogravimetric analysis showed that HTS exhibited better thermal behaviors. Estimated costs incurred in the production of the HTS were found to be cheaper than compared to BTS. Overall, the experiment result suggested that Teff straw could have the potential for producing a low cost activated chars.

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The effect of carbonization temperature, carbonization time and impregnation ratio on the properties of activated carbon produced from Arundo donax

Cited by 109 publications

References 55 publications

Synthesis of activated carbon from peanut shell as dye adsorbents for wastewater treatment

Synthesis of activated carbon from peanut shell as dye adsorbents for wastewater treatment

Performance of Sweet Potato’s Leaf-Derived Activated Carbon for Hydrogen Sulphide Removal from Biogas

Preparation, characterization and cost analysis of activated biochar and hydrochar derived from agricultural waste: a comparative study

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