Preparation and surface characteristics of phosphoric acid‐activated carbon from coconut shell in air

Higai, Daisuke; Huang, Zhebin; Qian, Eika W.

doi:10.1002/ep.13509

Cited by 22 publications

(6 citation statements)

References 31 publications

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“…Moreover, Figure shows the presence of phosphorus oxide on the surface of the active carbon structure . The C 1s XPS spectrum shows five peaks centered at about 284.5, 285.5, 286, 288.2, and 291.65 eV corresponding to C–C, C–O/C–O–C, C–P/C–O, CO–C, and π–π bonds, respectively . The obtained P 2p and C 1s spectra also show that the C–P bond exists in the structure of the FeMo-cit-TAC2 catalyst …”

Section: Resultsmentioning

confidence: 74%

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Effectiveness Study of Mesoporous Size, Acidity, and Precursor Type on Characterization of Activated Carbon as an Fe–Mo Catalyst Support for Hydrodesulfurization of Heavy Naphtha

Soleymani

Karimzadeh

Rashidi³

et al. 2023

Ind. Eng. Chem. Res.

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The main goal of this research is to evaluate the effects of various parameters on the synthesis of a Fe−Mo catalyst supported on an in-house developed mesoporous activated carbon. For this purpose, mesoporous carbon has been prepared from grape branches and oil palm trunks under various activation times and drying periods. Consequently, optimum values of the aforementioned parameters have been obtained in order to synthesize an efficient support for developing a heavy naphtha hydrodesulfurization (HDS) catalyst. Subsequently, a mixture of Fe−Mo with a weight ratio of 1:3 has been loaded on the developed supports through a wet impregnation method. Various experimental analyses including X-ray diffraction (XRD), Fourier transform infrared (FTIR), Brunauer−Emmett−Teller (BET), temperature programmed desorption (TPD), temperature programmed reduction (TPR), field-emission scanning electron microscopy (FESEM), X-ray photoelectron spectroscopy (XPS), X-ray fluorescence (XRF), thermogravimetric analysis (TGA), and energy dispersive X-ray (EDX) have been undertaken to determine the characteristics of synthetic catalysts and activated carbons. Once an appropriate catalyst has been synthesized on the basis of the experimental analyses, its performance for hydrodesulfurization of heavy naphtha has been investigated and has been compared to the efficiency of a catalyst with a commercial activated carbon support. The obtained results reveal that the sulfur conversions of heavy naphtha containing 900 ppm sulfur compounds at atmospheric pressure and at 340 °C are around 78 and 55% for the desulfurization process using the synthesized catalyst in the present work and the used commercial catalyst, respectively. It has also been found that a combination of grape branches and oil palm trunks contributes to an efficient mesoporous carbon structure, an acceptable thermal stability, and the development of a cost-effective support for the synthesis of an industrially viable HDS catalyst.

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Section: Resultsmentioning

confidence: 74%

“…61 The C 1s XPS spectrum shows five peaks centered at about 284. 62 The obtained P 2p and C 1s spectra also show that the C−P bond exists in the structure of the FeMo-cit-TAC2 catalyst. 63 3.4.…”

Section: Tpr Testmentioning

confidence: 65%

Effectiveness Study of Mesoporous Size, Acidity, and Precursor Type on Characterization of Activated Carbon as an Fe–Mo Catalyst Support for Hydrodesulfurization of Heavy Naphtha

Soleymani

Karimzadeh

Rashidi³

et al. 2023

Ind. Eng. Chem. Res.

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“…The mixture was heated in a (30 φ × 360) tubular glass quartz at 150 °C for 2 h at a heating rate of 10 °C/min, after which the mixture was heated at 400–800 °C at a heating rate of 10 °C/min within 1–4 h at a flow rate of 250 mL/min [ 36 ]. The samples were cooled to room temperature and washed with hot deionized water until neutral pH was obtained.…”

Section: Methodsmentioning

confidence: 99%

Highly Effective Cow Bone Based Biocomposite for the Sequestration of Organic Pollutant Parameter from Palm Oil Mill Effluent in a Fixed Bed Column Adsorption System

et al. 2021

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The reduction of chemical oxygen demand (COD) from palm oil mill effluent (POME) is very significant to ensure aquatic protection and the environment. Continuous adsorption of COD in a fixed bed column can be an effective treatment process for its reduction prior to discharge. Adsorption capacity of bone derived biocomposite synthesized from fresh cow bones, zeolite, and coconut shells for the reduction in the organic pollutant parameter was investigated in this study in a fixed bed column. The effect of influent flow rate (1.4, 2.0, and 2.6 mL/min) was determined at an influent pH 7. The optimum bed capacity on the fabricated composite of surface area of 251.9669 m2/g was obtained at 1.4 mL/min at breakthrough time of 5.15 h influent POME concentration. The experimental data were fitted to Thomas, Adams–Bohart, and Yoon–Nelson models fixed bed adsorption models. It was revealed that the results fitted well to the Adams Bohart model with a correlation coefficient of R2 > 0.96 at different influent concentration. Adsorption rate constant was observed to increase at lower flow rate influent concentration, resulting in longer empty bed contact time (EBCT) for the mass transfer zone of the column to reach the outlet of the effluent concentration. In general, the overall kinetics of adsorption indicated that the reduction in COD from POME using a bone-biocomposite was effective at the initial stage of adsorption. The pore diffusion model better described the breakthrough characteristics for COD reduction with high correlation coefficient. Shorter breakthrough time compared to EBCT before regeneration indicated that the bone composite was suitable and effective for the reduction in COD from POME using fixed bed column adsorption.

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“…As a consequence, the performed water wash can dissolve phosphate which disintegrates the granular structure . 47 A comparison between samples G2 and G4 shows that the applied organic acid reduces the crush strength from 400 N/cm for the former to 276 N/cm for the latter sample along with acceptable stability of the sample in water though the average pore size increases from 2.81 nm for sample G2 to 5.6 nm for sample G4. The current crush strength value is an acceptable value for the catalyst base of the HDS process.…”

Section: Impacts Of Bindermentioning

confidence: 98%

Granular Mesoporous Carbon Using Soft Template as a Support for Synthesis of HDS Catalyst

soleymani,

Karimzadeh,

Rashidi

et al. 2024

Preprint

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Background This research aims to synthesize a novel granular mesoporous activated carbon (AC). The produced carbon is utilized as a support for synthesis of a catalyst of hydrodesulfurization (HDS) process of a heavy naphtha sample. The novel AC benefits from a high mechanical strength despite its mesoporous structure originating from removing the existing defects. Methods A combination of binders with soft template is applied on the carbon to enhance its mechanical strength and establish its mesoporous structure. Also, effects of acid modification to the binder on the mechanical properties and surface characteristics of AC are investigated. Also, a Fe-Mo catalyst is synthesized on the prepared and commercial AC, and is tested for HDS process. Significant findings Accordingly, the results show that the average pore size and specific surface area of AC are increased significantly. Also, results showed that use of a combination of the cellulosic binder and the organic acid leads to the creation of a mesoporous structure in carbon with an average pore size of 5.6 nm, while inorganic acid creates micropore structure. The results indicate that sulfur conversion of feed at atmospheric pressure, using the prepared catalyst, is 80% while the synthetic catalyst on commercial AC-support brings 66% conversion.

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Preparation and surface characteristics of phosphoric acid‐activated carbon from coconut shell in air

Cited by 22 publications

References 31 publications

Effectiveness Study of Mesoporous Size, Acidity, and Precursor Type on Characterization of Activated Carbon as an Fe–Mo Catalyst Support for Hydrodesulfurization of Heavy Naphtha

Effectiveness Study of Mesoporous Size, Acidity, and Precursor Type on Characterization of Activated Carbon as an Fe–Mo Catalyst Support for Hydrodesulfurization of Heavy Naphtha

Highly Effective Cow Bone Based Biocomposite for the Sequestration of Organic Pollutant Parameter from Palm Oil Mill Effluent in a Fixed Bed Column Adsorption System

Granular Mesoporous Carbon Using Soft Template as a Support for Synthesis of HDS Catalyst

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