Hani Zeidan - Academia.edu (original) (raw)

Papers by Hani Zeidan

Research paper thumbnail of The relation between surface acidity and MoO3:Al2O3 ratio on the ternary mixed oxide catalysts for the conversion of propan-2-ol

Turkish Journal of Chemistry

Introduction One of the most widely manufactured polymers in industry is polypropylene (PP). Its ... more Introduction One of the most widely manufactured polymers in industry is polypropylene (PP). Its global market size was around USD 117.8 billion in 2020 and is projected to increase at an annual growth rate of 3.4% from 2021 to 2028 [1]. PP is synthesized via polymerization reaction of propene molecules and high purity of the monomers used in the process is strictly required for an efficient process. Practically 2/3 of the propene in industry is used for the production of PP [2]. Besides, it is employed for the manufacture of propene oxide (epoxypropane), acrylic (propenoic) acid, acrylonitrile (propenenitrile), butanol, and (1-Methylethyl) benzene (cumene) [1-3]. Propene is currently produced as a by-product fluid catalytic cracking and coproduct of naphtha catalytic cracking [3]. Propene obtained from refineries can be used in liquefied petroleum gas or to enhance the octane number in gasoline [1,2]. However, even negligible amounts of impurities can prevent the polymerization of propene into polypropylene. In addition, current production methods use huge amounts of energy, which also negatively influenced the greenhouse emissions [4,5]. Propene can be alternatively produced by catalytic dehydration of propan-2-ol (Eq. 1) [6]. In addition, this reaction is a probe to determine the acid-base sites of the solid catalysts [7]. In this context, the presence of acid sites (Brønsted and/ or Lewis) on the catalyst lead propene formation by dehydration, whereas acetone is formed via the dehydrogenation of propanol-2-ol (Eq.2) in the presence of basic sites or acid-base couples [3,8-17]. CH 3-CHOH-CH 3 → CH 3-CH=CH 2 + H 2 O (1) CH 3-CHOH-CH 3 → CH 3-CO-CH 3 + H 2 (2) In the literature, mainly supported catalysts have been employed for the dehydrogenation of propan-2-ol while various metal oxide catalysts were studied for the catalytic dehydration of propan-2-ol [9-22]. For example, Cu/Al 2 O 3 catalysts were used for the selective dehydrogenation of propan-2-ol to form acetone [10]. Moreover, high selectivity was obtained with Pt/ZrO 2 catalyst at the temperatures lower than 250 °C (T < 250 °C) for acetone formation [11]. Au/CeO 2 catalysts were reported to enhance the selectivity towards acetone by suppressing the dehydration of propan-2-ol [12]. Lately, CuO x PtO x /TiO 2-ZrO 2 catalysts showed high efficiency and selectivity due to their basic properties [13]. Supports are

Research paper thumbnail of Reactive extraction of pimelic (heptanedioic) acid from dilute aqueous solutions using trioctylamine in decan-1-ol

Fluid Phase Equilibria, 2016

The present study is on the reactive extraction of pimelic acid (heptanedioic acid) from dilute a... more The present study is on the reactive extraction of pimelic acid (heptanedioic acid) from dilute aqueous solutions by trioctylamine (TOA) in decan-1-ol. The equilibrium studies were performed at 298 K and the results were used to calculate the values of distribution coefficient (K D), loading factor (Z) and degree of extraction (E%). The maximum K D was obtained as 62.34 when initial concentrations of pimelic acid and TOA were 0.038 and 0.2 mol$kg À1 , respectively. The extraction efficiency was 98.27% under these conditions. Moreover, Z values between 0.184 and 2.934 were obtained in the ranges of parameters studied. The data presents the formation of 1:1 and 1:2 pimelic acid-TOA solvates in the organic phase. A solvatochromic model (LSER) was applied to the equilibrium data and the K D values obtained using the model show a good fit to the experimental outcomes.

Research paper thumbnail of Synthesis, characterization, and use of an amine-functionalized mesoporous silica SBA-15 for the removal of Congo Red from aqueous media

Research on Chemical Intermediates

Research paper thumbnail of Separation of Formic Acid from Aqueous Solutions onto Anion Exchange Resins: Equilibrium, Kinetic, and Thermodynamic Data

Journal of Chemical & Engineering Data, 2019

Wastewaters containing organic compounds such as acids, ketones, phenols, and amines can cause cr... more Wastewaters containing organic compounds such as acids, ketones, phenols, and amines can cause critical environmental problems depending on their concentration and composition. Efficient and low-cost separation of these components may also bring their reuse in industry while cleaning the aqueous streams. Formic acid (FA) is an important raw material in industry and is widely seen in wastewaters. In this study, two different anion exchangers were compared for the separation of FA from aqueous solutions. Effects of process parameters and the mechanism were discussed. Kinetic, equilibrium, and thermodynamic studies were performed, and the data were interpreted using the relevant isotherm and kinetic models. The results showed that Lewatit MP-64 was more efficient than Amberlite IRA-96 in the range of the parameters studied. The maximum adsorption capacity obtained with Lewatit MP-64 (442.75 mg/g) was significantly higher than that were previously reported in the literature for FA separation. The data were well explained by the Langmuir isotherm model. However, relatively high R 2 values were obtained with Temkin and Freundlich isotherms. Therefore, further studies are ongoing to clarify the mechanism.

Research paper thumbnail of Separation of Pimelic Acid Using Tri-n-octylamine in Various Organic Solvents by Reactive Extraction: Equilibrium and Modeling

Journal of Chemical & Engineering Data

Research paper thumbnail of Evaluation of olive pomace for the separation of anionic dyes from aqueous solutions: kinetic, thermodynamic, and isotherm studies

Today, water pollution is one of the major problems threatening human health. Synthetic dyes from... more Today, water pollution is one of the major problems threatening human health. Synthetic dyes from industrial effluents are among the many toxic compounds that cause water pollution. The aim of this study is the evaluation of olive pomace (OP) to be used as a biosorbent during the separation of two anionic dyes, Congo Red (CR) and Methyl Orange (MO), from aqueous solutions by adsorption technique. The biosorbent was characterized using Fourier transform infrared, Brunauer–Emmett–Teller, Barrett–Joyner–Halenda, and scanning electron microscopy with energy-dispersive X-ray spectroscopy. It was shown to be largely unaffected by pH, indicating that OP can be utilized over a wide pH range. Experiments were conducted without pH adjustment of aqueous solutions. Kinetics showed that adsorption followed the pseudo-second-order kinetic model and reached equilibrium in 210 min. Efficiency reduced with the increase in temperature and thermodynamic parameters indicated that physical or physico-ch...

Research paper thumbnail of Separation of formic acid and acetic acid from aqueous solutions using sugar beet processing fly ash: characterization, kinetics, isotherms and thermodynamics

The present study is on the use of sugar beet processing fly ash (SPFA) during the separation of ... more The present study is on the use of sugar beet processing fly ash (SPFA) during the separation of acetic acid (AA) and formic acid (FA) from aqueous solutions by adsorption technique. Kinetic studies showed that the equilibration time was about 70 min for AA while 60 min for FA. The related data were observed to follow the pseudo-second-order kinetic model. Isotherm curves exhibited that the process was fitted with Type 1. The adsorption efficiency increased with the increase in SPFA dosage and decreased with the AA or FA concentration. Equilibrium data were in consistency with the Langmuir isotherm model for both solutes. The adsorption capacities and removal efficiencies obtained with FA were higher than those with AA. The maximum values were 7.00 and 5.60 mmol/g for FA and AA, respectively. These values were considerably higher than the ones previously reported for the adsorption of these acids using several types of synthetic resins and fly ashes. Temperature negatively influence...

Research paper thumbnail of The relation between surface acidity and MoO3:Al2O3 ratio on the ternary mixed oxide catalysts for the conversion of propan-2-ol

Turkish Journal of Chemistry

Introduction One of the most widely manufactured polymers in industry is polypropylene (PP). Its ... more Introduction One of the most widely manufactured polymers in industry is polypropylene (PP). Its global market size was around USD 117.8 billion in 2020 and is projected to increase at an annual growth rate of 3.4% from 2021 to 2028 [1]. PP is synthesized via polymerization reaction of propene molecules and high purity of the monomers used in the process is strictly required for an efficient process. Practically 2/3 of the propene in industry is used for the production of PP [2]. Besides, it is employed for the manufacture of propene oxide (epoxypropane), acrylic (propenoic) acid, acrylonitrile (propenenitrile), butanol, and (1-Methylethyl) benzene (cumene) [1-3]. Propene is currently produced as a by-product fluid catalytic cracking and coproduct of naphtha catalytic cracking [3]. Propene obtained from refineries can be used in liquefied petroleum gas or to enhance the octane number in gasoline [1,2]. However, even negligible amounts of impurities can prevent the polymerization of propene into polypropylene. In addition, current production methods use huge amounts of energy, which also negatively influenced the greenhouse emissions [4,5]. Propene can be alternatively produced by catalytic dehydration of propan-2-ol (Eq. 1) [6]. In addition, this reaction is a probe to determine the acid-base sites of the solid catalysts [7]. In this context, the presence of acid sites (Brønsted and/ or Lewis) on the catalyst lead propene formation by dehydration, whereas acetone is formed via the dehydrogenation of propanol-2-ol (Eq.2) in the presence of basic sites or acid-base couples [3,8-17]. CH 3-CHOH-CH 3 → CH 3-CH=CH 2 + H 2 O (1) CH 3-CHOH-CH 3 → CH 3-CO-CH 3 + H 2 (2) In the literature, mainly supported catalysts have been employed for the dehydrogenation of propan-2-ol while various metal oxide catalysts were studied for the catalytic dehydration of propan-2-ol [9-22]. For example, Cu/Al 2 O 3 catalysts were used for the selective dehydrogenation of propan-2-ol to form acetone [10]. Moreover, high selectivity was obtained with Pt/ZrO 2 catalyst at the temperatures lower than 250 °C (T < 250 °C) for acetone formation [11]. Au/CeO 2 catalysts were reported to enhance the selectivity towards acetone by suppressing the dehydration of propan-2-ol [12]. Lately, CuO x PtO x /TiO 2-ZrO 2 catalysts showed high efficiency and selectivity due to their basic properties [13]. Supports are

Research paper thumbnail of Reactive extraction of pimelic (heptanedioic) acid from dilute aqueous solutions using trioctylamine in decan-1-ol

Fluid Phase Equilibria, 2016

The present study is on the reactive extraction of pimelic acid (heptanedioic acid) from dilute a... more The present study is on the reactive extraction of pimelic acid (heptanedioic acid) from dilute aqueous solutions by trioctylamine (TOA) in decan-1-ol. The equilibrium studies were performed at 298 K and the results were used to calculate the values of distribution coefficient (K D), loading factor (Z) and degree of extraction (E%). The maximum K D was obtained as 62.34 when initial concentrations of pimelic acid and TOA were 0.038 and 0.2 mol$kg À1 , respectively. The extraction efficiency was 98.27% under these conditions. Moreover, Z values between 0.184 and 2.934 were obtained in the ranges of parameters studied. The data presents the formation of 1:1 and 1:2 pimelic acid-TOA solvates in the organic phase. A solvatochromic model (LSER) was applied to the equilibrium data and the K D values obtained using the model show a good fit to the experimental outcomes.

Research paper thumbnail of Synthesis, characterization, and use of an amine-functionalized mesoporous silica SBA-15 for the removal of Congo Red from aqueous media

Research on Chemical Intermediates

Research paper thumbnail of Separation of Formic Acid from Aqueous Solutions onto Anion Exchange Resins: Equilibrium, Kinetic, and Thermodynamic Data

Journal of Chemical & Engineering Data, 2019

Wastewaters containing organic compounds such as acids, ketones, phenols, and amines can cause cr... more Wastewaters containing organic compounds such as acids, ketones, phenols, and amines can cause critical environmental problems depending on their concentration and composition. Efficient and low-cost separation of these components may also bring their reuse in industry while cleaning the aqueous streams. Formic acid (FA) is an important raw material in industry and is widely seen in wastewaters. In this study, two different anion exchangers were compared for the separation of FA from aqueous solutions. Effects of process parameters and the mechanism were discussed. Kinetic, equilibrium, and thermodynamic studies were performed, and the data were interpreted using the relevant isotherm and kinetic models. The results showed that Lewatit MP-64 was more efficient than Amberlite IRA-96 in the range of the parameters studied. The maximum adsorption capacity obtained with Lewatit MP-64 (442.75 mg/g) was significantly higher than that were previously reported in the literature for FA separation. The data were well explained by the Langmuir isotherm model. However, relatively high R 2 values were obtained with Temkin and Freundlich isotherms. Therefore, further studies are ongoing to clarify the mechanism.

Research paper thumbnail of Separation of Pimelic Acid Using Tri-n-octylamine in Various Organic Solvents by Reactive Extraction: Equilibrium and Modeling

Journal of Chemical & Engineering Data

Research paper thumbnail of Evaluation of olive pomace for the separation of anionic dyes from aqueous solutions: kinetic, thermodynamic, and isotherm studies

Today, water pollution is one of the major problems threatening human health. Synthetic dyes from... more Today, water pollution is one of the major problems threatening human health. Synthetic dyes from industrial effluents are among the many toxic compounds that cause water pollution. The aim of this study is the evaluation of olive pomace (OP) to be used as a biosorbent during the separation of two anionic dyes, Congo Red (CR) and Methyl Orange (MO), from aqueous solutions by adsorption technique. The biosorbent was characterized using Fourier transform infrared, Brunauer–Emmett–Teller, Barrett–Joyner–Halenda, and scanning electron microscopy with energy-dispersive X-ray spectroscopy. It was shown to be largely unaffected by pH, indicating that OP can be utilized over a wide pH range. Experiments were conducted without pH adjustment of aqueous solutions. Kinetics showed that adsorption followed the pseudo-second-order kinetic model and reached equilibrium in 210 min. Efficiency reduced with the increase in temperature and thermodynamic parameters indicated that physical or physico-ch...

Research paper thumbnail of Separation of formic acid and acetic acid from aqueous solutions using sugar beet processing fly ash: characterization, kinetics, isotherms and thermodynamics

The present study is on the use of sugar beet processing fly ash (SPFA) during the separation of ... more The present study is on the use of sugar beet processing fly ash (SPFA) during the separation of acetic acid (AA) and formic acid (FA) from aqueous solutions by adsorption technique. Kinetic studies showed that the equilibration time was about 70 min for AA while 60 min for FA. The related data were observed to follow the pseudo-second-order kinetic model. Isotherm curves exhibited that the process was fitted with Type 1. The adsorption efficiency increased with the increase in SPFA dosage and decreased with the AA or FA concentration. Equilibrium data were in consistency with the Langmuir isotherm model for both solutes. The adsorption capacities and removal efficiencies obtained with FA were higher than those with AA. The maximum values were 7.00 and 5.60 mmol/g for FA and AA, respectively. These values were considerably higher than the ones previously reported for the adsorption of these acids using several types of synthetic resins and fly ashes. Temperature negatively influence...