Papers by Abdelmottaleb ouederni
水素貯蔵のためのオリーブバガスのCO_2活性化【Powered by NICT】
Environmental Progress, 2017
Solid State Sciences, Jul 1, 2019
Nanoporous carbon was synthesized by blending formaldehyde and pyrogallol in water. In this proce... more Nanoporous carbon was synthesized by blending formaldehyde and pyrogallol in water. In this process picric acid was used as a catalyst and nickel oxide nanoparticles as an incorporated element. The samples were prepared at different pyrolysis temperatures. The impact of the elaboration conditions on the surface properties and methane and carbon dioxide (CH 4 , CO 2 ) adsorption at room temperature and high pressure up to 25 bars have been investigated. The obtained nanocomposites were characterized by different techniques such as: adsorption-desorption of N 2 at 77 K, X-ray diffraction, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The characterization of the samples revealed that the volumes of methane and carbon dioxide adsorbed are not related only to the specific surface area. The samples incorporated with nickel oxide and pyrolysed at less than 650 °C have improved the adsorbed amount of CO 2 and CH 4 , but for pyrolysis temperature higher than 650 °C we note that the adsorbed amount decreases due to the formation of carbon nanotubes surrounding the nickel nanoparticles which prevents gas to be highly adsorbed. The obtained material is promising for advanced technological applications for selective gas storage.
Materials Research Bulletin, 2016
-A series of activated carbon pellet without binder was prepared by chemical activation. -Carbon ... more -A series of activated carbon pellet without binder was prepared by chemical activation. -Carbon dioxide storage isotherm at 30°C and up to 25 bars was measured for the microporous carbon. -Adsorption enthalpies have been correlated with the carbon dioxide uptake. -Pyrolysis temperature effect on the electrical conductivity of the samples. -Impact of the both texture and electrical properties on CO 2 adsorption capacity have been deducted
International Journal of Membrane Science and Technology
This study focuses on improving the efficiency of flue gas purification systems for carbon dioxid... more This study focuses on improving the efficiency of flue gas purification systems for carbon dioxide (CO2) capture. The researchers investigated various factors, including flow rates, absorbent concentrations, nanoparticles, and temperature, to optimize the CO2 capture process. They conducted experiments using a polytetrafluoroethylene (PTFE) hollow fiber membrane contactor to separate CO2 from nitrogen. The presence of titanium dioxide and silica nanoparticles in a potassium carbonate solution facilitated the separation process. The findings indicate that optimizing flow rates and absorbent concentrations can enhance CO2 capture efficiency. The use of nanoparticles in the absorbent solution was found to improve material capture effectiveness. The study also revealed that higher temperatures contribute to increased CO2 capture efficiency. The research aims to advance CO2 capture techniques to mitigate the release of industrial greenhouse gases, particularly in flue gas treatment syste...
Photocatalytic degradation of paracetamol mediating luminous textile: Intensification of the chemical oxidation
Journal of Water Process Engineering
Cellulose Chemistry and Technology
The pyrolysis of olive stones was investigated by thermogravimetric analysis-mass spectrometry in... more The pyrolysis of olive stones was investigated by thermogravimetric analysis-mass spectrometry in nitrogen atmosphere under non-isothermal conditions, at heating rates of 5, 10, 20, and 30 °C/min. According to gas evolution analysis, the thermal degradation of olive stones under inert atmosphere can be divided into four stages. There was only dehydration in the first stage (<200 °C). Most of gas products (CO 2 , CO, CH 4 , C 2 H 6 and H 2 O) were evolved in the second stage in the temperature range 210-407 °C, simultaneously with main mass degradation. Only H 2 was produced in the fourth stage at high temperatures (>550 °C). Thermogravimetric analysis results have been utilized to determine kinetic parameters by using a composite procedure involving the iso-conversional method (Flynn-Wall-Ozawa and Kissinger-Akahira-Sunose) and the master-plots method. The activation energy values estimated by the Ozawa-Flynn-Wall and the Kissinger-Akahira-Sunose methods are very close, with values of 229.20 kJ/mol and 232.55 kJ/mol, respectively. The master-plots method shows that the most probable reaction mechanism was described by an order n (O n ) model. The frequency factor was estimated to be A = 5.6x10 21 min -1 , the kinetic exponent was n = 6.2, and the reaction model function was f(α) = (1-α) 6.2 .
From pomegranate peels waste to one-step alkaline carbonate activated carbons. Prospect as sustainable adsorbent for the renewable energy production
Journal of Environmental Chemical Engineering, 2021
Study of Synergetic Effect by Combining Dielectric Barrier Discharge (DBD) Plasma and Photocatalysis for Abatement of Pollutants in Air Mixture System: Influence of Some Operating Conditions and Identification of Byproducts
World Academy of Science, Engineering and Technology, International Journal of Architectural and Environmental Engineering, 2017
CO 2 Adsorption on Activated Carbon Based Olive Stone: A Comparison of Langmuir and Freundlich Models
Capture and storage of greenhouse gases, such as CO2, are a major technological and environmental... more Capture and storage of greenhouse gases, such as CO2, are a major technological and environmental challenge of the present time.
銅除去のための生ザクロ皮生物収着剤の特性化と吸着容量【Powered by NICT】
Journal of Cleaner Production, 2017
Towards a more efficient Hydrothermal Carbonization: Processing water recirculation under different conditions
Waste Management, 2021
The use of Processing Water (PW) on the Hydrothermal Carbonization (HTC) of tunisian pine cones w... more The use of Processing Water (PW) on the Hydrothermal Carbonization (HTC) of tunisian pine cones was investigated under different temperature (200 and 240 °C) and residence time conditions (3 and 20 h). Recirculating PW improved the HC (hydrochar) solid yield, without being detrimental to the carbon content of the HC. The heating value of the HCs, that with a single reaction already involved a rise of this parameter in the range 22.1-55.8% as compared to the raw material, was further increased up to 24.9-58.6% for cyclic runs. This was attributed to enhanced secondary char formation by reusing liquid, although this effect depended on the severity of previous HTC and was affected by both temperature and time. The HCs showed an increment on C and especially on N for cyclic runs. Also, thermal degradation peaks during HC TGA/DTA analyses showed a broader temperature range decomposition upon pyrolysis when PW was recirculated. The modifications of HC surface morphologies and functional groups was also investigated and associated to related reaction mechanisms.
Journal of the Chilean Chemical Society, 2019
Activated carbon (AC) prepared from olive stone (OSAC) was modified separately by ammoniac (OSAC/... more Activated carbon (AC) prepared from olive stone (OSAC) was modified separately by ammoniac (OSAC/AM) and sodium hydroxide (OSAC/H) aqueous solutions impregnation in order to improve their adsorption properties toward phenol. The raw and modified activated carbons were characterized. The porous structure was characterized using N 2 adsorption at 77 K. The surface functional group characteristics were examined by Fourier transform infrared (FTIR) spectroscopy, Boehm titration, the point of zero charge (pH pzc ) measurement and X-ray photoelectron spectroscopy (XPS) method. The isotherms of phenol adsorption on the original and modified ACs were measured. After modification, the activated carbon showed enhanced adsorption capacity for phenol. The effect of alkaline solution concentration on adsorption process was investigated. Results showed a decrease of the microporosity of AC after alkalin treatment especially for higher solution concentration. The amounts of the surface basic groups of the modified ACs increased, in comparison with the original AC, with the increase of the alkaline concentration; however the acidic surface groups decreased. The equilibrium adsorption data were best described by Langmuir model. The maximum adsorption capacity of phenol enhanced for ammonia and sodium hydroxide, respectively, compared with the original AC. We noted that the higher alkaline concentration the higher the adsorption capacity of AC for phenol.
Renewable Energy, 2019
An unpublished low-cost industrial biomass waste, pomegranate peel, as alternative and sustainabl... more An unpublished low-cost industrial biomass waste, pomegranate peel, as alternative and sustainable fuel source was studied. A horizontal tubular furnace of original design for conventional and flash pyrolysis was carried out. The bio-char yields from both processes were similar, but the bio-oil and bio-gas yields were higher in flash pyrolysis, depending on the temperature. The bio-char obtained show that it could be used as a fuel (higher heating values ≥ 28.0MJ/kg) and as a potential precursor of activated carbon. It was also found that the lower temperature of the flash pyrolysis was, the greater the bio-oil yield (~53%) and that the higher was, the greater the biogas yield (~50%). The bio-oil from conventional pyrolysis has a predominantly furanic nature and contained significant amounts of the phenols and benzenes. In contrast, the bio-oil from flash pyrolysis is similar to that of "anthracene oil", both of them being composed mainly of polycyclic aromatic hydrocarbons. The bio-gas obtained by flash pyrolysis is of a higher quality than that obtained by conventional pyrolysis because it has a lower CO 2 content (32.4% vs 66.6%) and higher syngas content (CO + H 2 ) (50.8% vs 26.8%). Flash pyrolysis is better in CH 4 production (11.6% vs 4.6%).
International Journal of Hydrogen Energy, 2017
Nanoporous carbons were synthesized at certain conditions by solegel method combined with furnace... more Nanoporous carbons were synthesized at certain conditions by solegel method combined with furnace firing in inert atmosphere from pyrogallol-formaldehyde (PF) mixtures in water using perchloric acid as catalyst. Their morphology was studied experimentally to examine their adsorption capacity for greenhouse gases. The preparation conditions of the nanoporous carbons were explored by changing the pyrolysis temperature. The effect of this factor on determining the pore structures and the adsorption capacities were evaluated. The synthesized xerogels were characterized by X-ray diffraction, nitrogen adsorptionedesorption isotherms, thermogravimetric analysis (TGA), differential thermal analysis (DTA), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results showed that surface areas and nitrogen adsorption capacity are dependent completely on the pyrolysis temperature. Equilibrium and enthalpies studies for the CO 2 and CH 4 adsorption on PF were measured at room temperature and up to 25 bar. The adsorption capacity on PF was highest for CO 2 and then CH 4 . The best sample shows maximal adsorption capacities as follows 5.50 mmol g À1 of CH 4 and 7.62 mmol g À1 of CO 2 at 25 bar and 30 C.
Effects of nitrogen plasma treatment on the surface characteristics of olive stone-based activated carbon
Environmental Technology, 2016
ABSTRACT Nitrogen plasma treatment (NPT) of activated carbon (AC) at different conditions was car... more ABSTRACT Nitrogen plasma treatment (NPT) of activated carbon (AC) at different conditions was carried out to introduce nitrogen-containing groups onto olive stone-activated carbon (OSAC) surfaces. Textural characteristics of raw and irradiated samples were analyzed by N2 and CO2 adsorption. Surface chemical functional groups were analyzed by X-ray photoelectron spectrometry (XPS) and Fourier Transformed Infrared spectroscopy. The results showed that after NPT, the surface textural properties of irradiated OSAC were slightly damaged, and a gradual decrease in surface area and pore volume was observed during the irradiation. XPS revealed that NPT could change the distribution of oxygen functional groups on the OSAC surface and there were more nitrogen atoms incorporated into the aromatic ring. A tentative explanation for the modification process is proposed. Phenol adsorption was enhanced from 110 mg/g for untreated AC to 635 mg/g for 30-min plasma-treated OSAC.
Environmental Science and Pollution Research, 2016
HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific r... more HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.
Olive stones as a solid waste of Tunisian olive manufacture were used to prepare activated carbon... more Olive stones as a solid waste of Tunisian olive manufacture were used to prepare activated carbon (AC). The raw material was chemically activated with phosphoric acid. The textural characteristics, including surface area, pore volume and mean pore diameter, were determined by nitrogen adsorption at 77 K. FTIR spectroscopy, XPS, pH, pH pzc and Bohem method were used to characterize the chemical surface. Iodine and phenol numbers were also determined. Single and binary mixture adsorption of phenol, 2 nitrophenol (2NP) and salicylic acid (SA) were studied in batch mode. The adsorption equilibrium of three solute were carried out in the range of 20-500 mg/l initial concentration at 30°C and 3 SA>2NP.
Olive stones based carbon foam: synthesis, characterization and application on post-combustion CO2 adsorption
Journal of Porous Materials, 2022
In the present paper, the performance of carbon foams to adsorb CO2 in post-combustion conditions... more In the present paper, the performance of carbon foams to adsorb CO2 in post-combustion conditions using a thermo-gravimetric analyzer was investigated. Two types of carbon foams were prepared in this study from molten sucrose and activated carbon powder as foaming and foam setting agents by adding or not of nitric acid. Both carbon foams were subjected to chemical and textural characterization such as FT-IR, Boehm titration, SEM and physical adsorption. Then, these materials were evaluated for CO2 adsorption in a binary mixture (10% CO2 + 90% N2), representative of post-combustion conditions, at two temperatures 25 and 50 °C. The obtained carbon foams present a hierarchical macro–micro pore structure with narrow-micropores in the cell walls and micropores sizes of less than 0.6 nm. The produced adsorbent materials showed a high and competitive CO2 uptake in pure flow at 0 °C with a CO2 adsorption capacity of up to 3 mmol g−1. In addition, carbon foams adsorbents showed high CO2/N2 selectivity in binary (CO2 + N2) adsorption/desorption tests thanks to their very narrow microporosity not accessible for N2 molecules but accessible to CO2. Thus, biomass-based carbon foams are promising candidates to selectively capture CO2 in post-combustion conditions.
Journal of Chemical Engineering & Process Technology, 2013
Activated carbon is prepared with chemical activation of olive stones, by using H 3 PO 4 . Batch ... more Activated carbon is prepared with chemical activation of olive stones, by using H 3 PO 4 . Batch adsorption of phenol from aqueous solution was investigated. The adsorptive properties were studied in terms of pH, equilibrium time, initial concentration (C 0 : 25-300 mg/L) and particle sizes (0.125-1.6mm) effects. The experimental kinetic data fitted well the pseudo second order model and the equilibrium isotherm data the Langmuir model. The results indicate that chemical olive stones activated carbon is suitable to be used as an adsorbent material for adsorption of phenol from aqueous solution.
Comptes Rendus Chimie, Sep 1, 2022
Hydrogen production by methane decomposition over Ni-doped activated carbons: effect of the activ... more Hydrogen production by methane decomposition over Ni-doped activated carbons: effect of the activation method
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Papers by Abdelmottaleb ouederni