Sharif University of TechnologyScientia Iranica1026-309817220100201Manganese Oxide Doped Noble Metals Supported Catalyst for Carbon Dioxide Methanation Reaction3372ENR.AliDepartment of Chemistry,Kuwait UniversityW. A. W.Abu BakarDepartment of Chemistry,University of MashadNajwaSulaimanDepartment of Chemistry,University of KansasHazwan FaizAbd RahimDepartment of Chemistry,University of KansasJournal Article20110103Manganese oxide supported on alumina was prepared for methanation reaction by doping
the manganese oxide based catalyst with noble metals, namely ruthenium, Ru and palladium, and Pd,
via an impregnation method. The potential catalyst was calcined at 400C, 700C and 1000C for 5
hours separately. An in-house-built micro reactor with an FTIR detector and GC was used to study the
percentage of CO2 conversion and also the percentage of CH4 formation. Ru/Mn (30:70)-Al2O3 calcined
at 1000C was the potential catalyst, which gave 86.82% CO2 conversion and 61.94% CH4 yield at a
reaction temperature of 200C. XRD analysis showed that the catalyst is of a crystalline phase, while
FESEM illustrated the catalyst surface was covered with small and dispersed particles with an unde ned
shape. EDX analysis revealed that there was 21.15% reduction of Ru in the spent catalyst compared to the
fresh catalyst due to the migration of Ru particles into the porous support during the reaction. There was
5.39% reduction of surface area over the spent Ru/Mn (30:70)-Al2O3 catalyst, characterized by Nitrogen
Adsorption analysis. FTIR analysis revealed that the catalyst surface is hydrated.https://scientiairanica.sharif.edu/article_3372_91b0f2e16c679a2fc12d115c2f3b4b6c.pdfSharif University of TechnologyScientia Iranica1026-309817220100201Epoxidation of Olefins Catalyzed by Some cis-Dioxomolybdenum(VI)-Tridentate Schi Base Complexes with tert-Butyl Hydroperoxide3373ENM.BagherzadehDepartment of Chemistry,Sharif University of TechnologyS.Ghazali EsfahaniDepartment of Chemistry,Sharif University of TechnologyJournal Article20110103Some cis-dioxomolybdenum (VI) complexes with tridentate Schi base ligands derived from
salicylaldehyde and aminophenols, aminoalcohol or o-aminobenzenethiol were examined as catalysts for
epoxidation of di erent aliphatic and aromatic ole ns, with tert-butyl hydroperoxide as oxidant. All
complexes exhibited high activity and selectivity for epoxidation of aliphatic substrates during a short time
period (95% conversion of cyclooctene after 30 min). The epoxide yield increased with the nucleophilic
character of ole n. The catalysts activation strongly depends on the reaction temperature and nature of
the solvent. Epoxidation of ole ns by these catalysts is inhibited by ligands or coordinating solvents such
as alcohols.https://scientiairanica.sharif.edu/article_3373_0c9e72c2a808ff87458a4f83d19829a5.pdfSharif University of TechnologyScientia Iranica1026-309817220100201Photodegradation of N-Methyldiethanolamine over ZnO/SnO2 Coupled Photocatalysts3374ENR.AliDepartment of Chemistry,Kuwait UniversityW. A. W.Abu BakarDepartment of Chemistry,University of MashadS.S.MislanDepartment of Chemical Processes Developmant and Engineering,British Nuclear Fuels LtdM.A.SharifuddinDepartment of Chemistry,British Nuclear Fuels LtdJournal Article20110103A photocatalyst semiconductor can be used to remove organic pollutants from wastewater
in the presence of UV light. In this research, coupled ZnO/SnO2 semiconductors with 1:1 and 2:1 ratios
were prepared using the co-precipitation method. The prepared coupled ZnO/SnO2 photocatalyst was
tested towards the photodegradation of simulated N-Methyldiethanolamine (MDEA) under UV-irradiation
( = 365 nm, 100 V, 6 W). The ZnO/SnO2 was characterized using UV di used re
ectance spectroscopy
and X-ray di raction. The band gap energy for ZnO/SnO2 (ZS) catalyst calcined at 200C, 400C,
600C and 900C were 3.22, 3.13, 3.12 and 3.07 eV, respectively, while for Z2S were 3.71, 3.28, 3.16,
and 3.14 eV, respectively. XRD results indicated that ZS and Z2S catalysts possessed mixed phases of ZnO,
SnO2 and Zn2SnO4 at a calcinations temperature above 600C. The ZnO/SnO2 (2:1) catalyst, which was
calcined at 600C for 9 hours, gave the optimum percentage photodegradation of MDEA with 39.18%.
The percentage degradation of MDEA was measured using ion chromatography with retention time at the
measured peak of 4-5 minutes. The optimum system was applied on the photodegradation of MDEA in
petroleum wastewater. The percentage degradation of MDEA in petroleum wastewater was 23.38 %.https://scientiairanica.sharif.edu/article_3374_0342b1a63474c1ba6b00d85db4a7cf71.pdfSharif University of TechnologyScientia Iranica1026-309817220100201XRD, AFM and UV-Vis Optical Studies of PbSe Thin Films Produced by Chemical Bath Deposition Method3375ENSoon MinHoDepartment of Chemistry,University of MarylandAnuarKassimDepartment of Chemistry,Macquarie UniversityAbdul HalimAbdullahDepartment of Chemistry,Macquarie UniversitySaravananNagalingamDepartment of Chemistry,Macquarie UniversityJournal Article20110103PbSe thin films have been deposited on microscope glass substrates by chemical bath
deposition technique. The chemical bath consisted of lead nitrate, sodium selenate and triethanolamine
solutions. The in
uence of bath temperature on the properties of PbSe lms was investigated. The X-ray
diffraction, atomic force microscope and UV/Vis Spectrophotometer were used to obtain the structural
characterization, surface morphological and absorbance data, respectively. Based on the X-ray di raction
results, the thin lms obtained were found to be polycrystalline in nature with cubic structure. The
intensity of the (111) peak showed a signi cant increased as the bath temperature was increased from 40
to 80C. The lms deposited at 80C indicated that the crystallinity was improved and more PbSe peaks
were observed. On the other hand, the grain size, lm thickness and surface roughness were increased
while band gap energy decreased as could be observed in atomic force microscope and UV-Vis optical
studies, respectively.https://scientiairanica.sharif.edu/article_3375_d85cbf0c28886e03afc40d7d3c334067.pdfSharif University of TechnologyScientia Iranica1026-309817220100201Separation and Preconcentration of Ultra Traces of Some Heavy Metals in Environmental Samples by Electrodeposition Technique Prior to Flame Atomic Absorption Spectroscopy Determination (ED-FAAS)3376ENN.Mashkouri NajafiDepartment of Chemistry,Shahid Beheshti UniversityParmisShakeriDepartment of Chemistry,Shahid Beheshti UniversityEnsiehGhasemiDepartment of Chemistry,Shahid Beheshti UniversityJournal Article20110103In this approach, electrodeposition was developed for separation of ultra traces of some
heavy metals from the complex matrices prior to determination by
ame atomic absorption spectroscopy.
The electrodeposition is carried out at optimized parameters of pH and temperature of electrolyte, voltage
and duration time of deposition. The calculated LOD for ED-FAAS for the interested elements was found
as follows: 1.27 ng mL????1 for Co, 0.14 g mL????1 for Re, 1.56 ng mL????1 for Ni, 1.84 ng mL????1 for Au,
0.02 g mL????1 for Pt and 6.67 ng mL????1 for In. Characteristic concentration for Co, Re, Ni, Au, Pt and
In in ED-FAAS technique are 1.72, 660, 2.67, 2.99, 30 and 9.60 ng mL????1 with %RSD as 1.54, 2.69,
2.45, 2.77, 2.38 and 2.55, respectively. These elements were measured in some environmental samples.
Concentration of Co and Ni in a mineral water are 12.46 and 21.43 ng mL????1, respectively, concentration
of Re in a molybdenum mineral concentrate is 4.65 g mL????1, concentration of Au in a geological samples
is 6.00 ng mL????1. It was also found that the recovery test for spiked Pt and In to a waste water samples
is promising using the proposed technique.https://scientiairanica.sharif.edu/article_3376_5a12a5045f9786e909afe7ea60ec28f1.pdfSharif University of TechnologyScientia Iranica1026-309817220100201Comparison of Solid Substrate and Submerged Fermentation for Chitosan Production by Aspergillus niger3377ENS.YaghmaeiDepartment of Chemical and Petrochemical Engineering,Sharif University of TechnologyV.MaghsoodiBiochemical and Bioenvironmental Research Center,Sharif University of TechnologyJournal Article20110103Production yield of solid-state (SSF) and submerged fermentation (SMF) on chitosan from
Aspergillus niger was investigated. A. niger BBRC 20004 was grown on soybean residue and Sabouraud
Dextrose Broth medium (2% glucose). Chitosan was extracted from the fungal mycelia using hot alkaline
and acid treatment. Soybean residue at a moisture content of 37%, and 8.4 0.26% of nitrogen content
produced the highest amount of chitosan, 17.053 0.95 g/kg dry substrate after 12 days. Also, chitosan
was extracted from A. niger on Sabouraud Dextrose Broth medium in submerged fermentation (0.8455 g/l
after 12 days of cultivation). The yield of chitosan isolated in SSF was about 15-20 times more than in
SMF (Submerged Fermentation).
Keyword: Chitosan; Soybean residue; Solid-State Fermentation (SSF); Submerged Fermentation (SMF);
Sabouraud Dextrose Broth (SDB); Glucose; Aspergillus niger.https://scientiairanica.sharif.edu/article_3377_10f1bad7bc76d0a82c1cabf904c2aed3.pdfSharif University of TechnologyScientia Iranica1026-309817220100201Modeling of Methane and Propane Hydrate Formation Kinetics Based on Chemical Afinity3378ENA. A.IzadpanahDepartment of Chemical Engineering,Guilan UniversityF.VaraminianDepartment of Chemical Engineering,Semnan UniversityJournal Article20110103In this study, experimental data on the kinetics of methane and propane hydrate formation
at constant volume were collected. The experiments were carried out in a batch reactor under different
temperatures and pressures. The chemical anity was used for modeling of the hydrate formation rate
in a constant volume process. In this method, the system was considered as a classical thermodynamic or
macroscopic view. The results show that this method can predict constant volume experimental data well
for both crystals I and II hydrate former.https://scientiairanica.sharif.edu/article_3378_922e9a5c94f7e20dcc67888ef11be762.pdfSharif University of TechnologyScientia Iranica1026-309817220100201Effect of Operation Conditions on the Catalytic Performance of the Co/Mn/TiO2 Catalyst for Conversion of Synthesis Gas to Light Ole ns3379END.RashtchianDepartment of Chemical Engineering,Sharif University of TechnologyR.Bozorgmehry BoozarjomehryDepartment of Chemical Engineering,Sharif University of TechnologyC.GhotbiDepartment of Chemistry,Sharif University of TechnologyF.ShayeghDepartment of Chemistry,Sharif University of TechnologyJournal Article20110103The e ect of operation variables, such as the H2/CO molar feed ratio, gas hourly space
velocity (GHSV), temperature, and pressure, on the catalytic performance of the Co/Mn/TiO2 catalyst
prepared at the Research Institute of the Petroleum Industry (RIPI) was investigated, and optimum reactor
conditions were obtained to produce the maximum amount of light ole ns. The catalyst was prepared by
co-precipitation of Co and Mn phases in the presence of commercial TiO2 with maximum selectivity
for ethylene and propylene production. It was found that the [H2]/[CO]=2/1, space velocity (GHSV)
of 1800 h????1, 280C temperature and 4 bar pressure were optimum operating conditions for the modi ed
catalyst for the conversion of Synthesis Gas(SG) to light ole ns. The results were interpreted in terms of
the structure of the catalyst. Characterizations of catalysts were carried out using XRD, SEM and BET
speci c surface area.https://scientiairanica.sharif.edu/article_3379_431f32d512e5a75bb8d47dd92522fc94.pdfSharif University of TechnologyScientia Iranica1026-309817220100201A New Three Parameter Cubic Equation of State3380ENAliAbdelrahman RabahDepartment of Chemistry,Kuwait UniversitySumyaAbdel Moneim MohamedDepartment of Chemistry,Kuwait UniversityJournal Article20110103A new three parameter Equation Of State (EOS) is developed based on well documented
data, at three thermodynamic states of the critical point, the normal bubble point and standard condition.
Besides these states, the EOS is designed to satisfy the condition of nearly zero Joule-Thomson (JT)
coecients at the normal boiling point. Critical properties and densities at the normal boiling point
and a standard condition of more than 100 pure
uids were used. The new EOS is validated using
experimental data and eight (8) of the popular EOSs, namely, SRK, PR, LLS, HK, MNM, SW, PT and
ALS. The experimental data for pure
uids include 331 data points of vapor pressure covering 12
uids
and compressibility at the critical condition of 23
uids. For mixtures, the data includes 129 PVT data
points of 12 reservoir
uids [seven (7) of them are Sudanese crude oil considered for publication for the
rst time and ve (5) from literature]. The new EOS is found to be superior to the existing EOSs in
the prediction of PVT properties of mixtures with a grand average percent absolute deviation (AAPD) of
3.18%. It is also comparable to the existing EOSs in the prediction of vapor pressure despite the fact that
existing EOSs are developed based on vapor pressure data; the grand average AAPD is 2.0. In terms of
compressibility at the critical point with the exception of LLS, the new EOS yields better results than all
other EOSs considered in this work.https://scientiairanica.sharif.edu/article_3380_d7ab3636bd5b7c46399b2dde09707863.pdfSharif University of TechnologyScientia Iranica1026-309817220100201Effects of Rock Permeability on Capillary Imbibition Oil Recovery from Carbonate Cores3381ENI.GoodarzniaDepartment of Chemical and Petroleum Engineering,Sharif University of TechnologyH.DarvishiDepartment of Chemistry,Sharif University of TechnologyF.EsmaeilzadehDepartment of Chemistry,Sharif University of TechnologyJournal Article20110103In order to investigate the feasibility and e ects of core permeability on capillary imbibition
recoverable oil from carbonate cores, some laboratory tests were carried out at the EOR research
laboratories of Sharif University, Iran. Outcrop rocks with di erent permeabilities were taken away from a
recognized outcrop and used in these experiments. Special core analysis tests were run on two core samples
to nd out relative permeability and end point saturations. Wellhead separator oil and gas samples were
collected and recombined to a reservoir gas - oil ratio. A core
ooding system with a capability of free and
forced imbibition testing was designed and installed. A number of free and forced imbibition tests with
di erent cores under reservoir conditions were conducted. The results of the tests revealed that capillary
imbibition is an almost fast process at laboratory scale and the higher permeable cores will imbibe more
easily. A good correlation could be obtained when the ratio of recovery factor to ultimate recovery factor
versus a de nite function of time was plotted. From these experiments, it concluded that an up scaled
relation can be perceived for very low permeable cores, the testing of which may take too long.https://scientiairanica.sharif.edu/article_3381_ed9d57f542bcc9b15a38b448b23baaad.pdfSharif University of TechnologyScientia Iranica1026-309817220100201Comparison of Sol-Gel Methods for Washcoating Metallic Substrates3382ENJ.TowfighiDepartment of Chemical Engineering,Tarbiat Modares UniversityFaranakAkhlaghianDepartment of Chemical Engineering,Tarbiat Modares UniversityA.MohajeriDepartment of Chemical Engineering,Tarbiat Modares UniversityA.ZamaniyanDepartment of Chemical Engineering,Tarbiat Modares UniversityJournal Article20110103FeCrAl foils were coated with alumina. Washcoating solutions were prepared using di erent
sol-gel methods. Method A uses an inorganic precursor of aluminum nitrate and a complexing agent
of Acetylactone, method B is a hot hydrolysis of aluminum alkoxide, and method C is a modi cation
of method B, by adding aluminum acetylacetonate. The last method, D, is a hydrolysis of aluminum
alkoxide at room temperature. Washcoating solutions were deposited on FeCrAl foils through dip coating.
Then, the coated foils were dried at 100C and calcined at 600C/3 for 2 hours. Ultrasound vibration
tests showed a good adhesion of washcoat layers. Characteristics of the washcoat layers were determined
by X-Ray Di raction (XRD), Scanning Electron Microscopy (SEM), Brunauer-Emmet-Telller (BET),
and Thermal Gravimetric Analysis (TGA) tests. Results of BET tests show that surface areas in sol-gel
methods are greater than those found in the suspension method, and the inorganic sol-gel method (method
A) has a lower surface area than those found in organic sol-gel methods.https://scientiairanica.sharif.edu/article_3382_b9267f7f376594fcda7d67f8eebc56e9.pdf