Sharif University of TechnologySharif Journal of Mechanical Engineering2676-472525No . 5020090923MODELING THE GROWTH KINETIC OF YEAST BBRC-9026 ON PHENOLMODELING THE GROWTH KINETIC OF YEAST BBRC-9026 ON PHENOL385707FAF.Amiriدانشکده مهندسی شیمی و نفت، دانشگاه صنعتی شریفS.YaghmaeiDept. of Chemical and Petroleum Engineering
Sharif University of TechnologyS.SamieDept. of Chemical and Petroleum Engineering
Sharif University of TechnologyJournal Article20070306In this study, phenol-degrading microorganisms were isolated from an activated sludge system that had been acclimated with synthetic phenolic wastewater for six months. After investigating the performance of each strain on phenol, in the presence and absence of co-substrate, the best-isolated strain was chosen. In the next phase, the best-isolated microorganism's growth on different phenol concentrations was examined in a shaking flask scale, at different times. The kinetic constants obtained by modeling the growth kinetic of the best isolated strain, according to the Haldane model, and with the help of Matlab 6.5, were µm=0.592 (1/h), Ks= 920.3 (mg/L), and KI= 115.62 (mg/L). This kinetic model is a good tool for simulation and scale-up in designing an industrial wastewater bio-treatment process.In this study, phenol-degrading microorganisms were isolated from an activated sludge system that had been acclimated with synthetic phenolic wastewater for six months. After investigating the performance of each strain on phenol, in the presence and absence of co-substrate, the best-isolated strain was chosen. In the next phase, the best-isolated microorganism's growth on different phenol concentrations was examined in a shaking flask scale, at different times. The kinetic constants obtained by modeling the growth kinetic of the best isolated strain, according to the Haldane model, and with the help of Matlab 6.5, were µm=0.592 (1/h), Ks= 920.3 (mg/L), and KI= 115.62 (mg/L). This kinetic model is a good tool for simulation and scale-up in designing an industrial wastewater bio-treatment process.https://sjme.journals.sharif.edu/article_5707_b79271d02e72cd6c77373a807ef241ba.pdfSharif University of TechnologySharif Journal of Mechanical Engineering2676-472525No . 5020090923STUDY OF ORGANIC POLLUTANTS IN TEHRAN GROUND WATERSTUDY OF ORGANIC POLLUTANTS IN TEHRAN GROUND WATER9145708FAZ.TooyserkaniChemical and Petroleum Engineering Department Sharif UniversityJ.ShayeganChemical and Petroleum Engineering Department Sharif UniversityA.SadeghiChemical and Petroleum Engineering Department Sharif UniversityJournal Article20070820In this study, the Total Organic Carbon, Nitrate and Petroleum hydrocarbons of Tehran's groundwater have been measured. According to this study, the average TOC was 9.3 mg/L, which is much above standard. For the Nitrate, although there were few samples below standard, samples above 45 mg/L were numerous, with a maximum of 133 mg/L. The Petroleum Hydrocarbon content of most of the wells was negligible, nevertheless there were two wells indicating MTBE content, which shows contamination from the underground tanks of nearby gas stations. In conclusion, Tehran groundwater needs special treatment to be used as a drinking water.In this study, the Total Organic Carbon, Nitrate and Petroleum hydrocarbons of Tehran's groundwater have been measured. According to this study, the average TOC was 9.3 mg/L, which is much above standard. For the Nitrate, although there were few samples below standard, samples above 45 mg/L were numerous, with a maximum of 133 mg/L. The Petroleum Hydrocarbon content of most of the wells was negligible, nevertheless there were two wells indicating MTBE content, which shows contamination from the underground tanks of nearby gas stations. In conclusion, Tehran groundwater needs special treatment to be used as a drinking water.https://sjme.journals.sharif.edu/article_5708_1df1bfc1080e8364ffcace5088aad1ce.pdfSharif University of TechnologySharif Journal of Mechanical Engineering2676-472525No . 5020090923OPTIMIZATION OF OXIDATIVE COUPLING OF METHANE OVER PEROVSKITE CATALYST AND OCM KINETICS MODELING BY GENETIC ALGORITHOPTIMIZATION OF OXIDATIVE COUPLING OF METHANE OVER PEROVSKITE CATALYST AND OCM KINETICS MODELING BY GENETIC ALGORITH15245709FASh.MokhtariIran Polymer & Petrochemical InstituteA.VataniDept. of Chemical Engineering Tehran UniversityN.FaroojiDept. of Chemical Engineering Tehran UniversityV.EslamimaneshIran Polymer & Petrochemical InstituteJournal Article20071204In recent years, there is a strong incentive to study and develop processes that would convert methane into more valuable chemical & petrochemical products. To this end, in this research, kinetic studies on the oxidative coupling of methane at temperatures of 725, 750, 775, 785°C and a methane/oxygen ratio of 2, 3, 3.5, 4 and 4.5, have been conducted in a tubular fixed bed reaction, using perovskite titanate as the reaction catalysts; optimum operating conditions have been proposed. Correlation of the kinetic data has been performed with the models proposed and their parameters have been optimized. Modeling is based on random searching algorithms, of which GA is one. Six models have been selected among the common kinetic models; then, the selected models have been regressed with experimental data obtained from the Catatest system by GA, in order to obtain optimized parameters. One of the selected models (Santamaria) had good agreement with experimental data. The Arrhenius parameters of this model have been obtained by linear regression. The Marquardt algorithm has also been used in this research and its results compared with GA. It should be noted that the Marquardt algorithm is sensitive to first guesses and there is a possibility of trapping in the relative minimum.In recent years, there is a strong incentive to study and develop processes that would convert methane into more valuable chemical & petrochemical products. To this end, in this research, kinetic studies on the oxidative coupling of methane at temperatures of 725, 750, 775, 785°C and a methane/oxygen ratio of 2, 3, 3.5, 4 and 4.5, have been conducted in a tubular fixed bed reaction, using perovskite titanate as the reaction catalysts; optimum operating conditions have been proposed. Correlation of the kinetic data has been performed with the models proposed and their parameters have been optimized. Modeling is based on random searching algorithms, of which GA is one. Six models have been selected among the common kinetic models; then, the selected models have been regressed with experimental data obtained from the Catatest system by GA, in order to obtain optimized parameters. One of the selected models (Santamaria) had good agreement with experimental data. The Arrhenius parameters of this model have been obtained by linear regression. The Marquardt algorithm has also been used in this research and its results compared with GA. It should be noted that the Marquardt algorithm is sensitive to first guesses and there is a possibility of trapping in the relative minimum.https://sjme.journals.sharif.edu/article_5709_e696125e9065baed7d5ffc14d8389863.pdfSharif University of TechnologySharif Journal of Mechanical Engineering2676-472525No . 5020090923MMP DETERMINATION BY PARACHOR METHOD AND COMPARISON WITH ANALYTICAL METHODMMP DETERMINATION BY PARACHOR METHOD AND COMPARISON WITH ANALYTICAL METHOD25335710FASeyyed FoadAghamiriDept. of Chemical Engineering University of IsfahanS.H.SadraeeDept. of Chemical Engineering University of IsfahanJournal Article20080628The minimum miscibility pressure (MMP) is a key concept in EOR by using miscible gas injection. In this report, MMP will be calculated by analytical and Parachor methods and the results are compared with experimental data. In the analytical method, initial and injection tie lines are determined by using negative ash calculations for both reservoir oil and injection gas. These tie lines will be corresponded with cross tie lines. MMP is the pressure where the length of one tie line (from initial to injection tie lines) equals zero. In the second method, MMP is calculated according to this fact; that interfacial tension between two phases goes to zero at completely miscibility. The interfacial tension is calculated by the Parachor model. Analytical calculations are performed by PR, SRK and MNM EOS. Results of analytical and Parachor methods are compared with the experimental data of slim tube and vanishing interfacial tension (VIT) methods. Results show superior agreement between calculations and experimental data. Our results indicate that MMP will be reduced significantly, due to the presence of intermediate components of reservoir oil in the injection gas and the similarity between reservoir oil and injection gas.The minimum miscibility pressure (MMP) is a key concept in EOR by using miscible gas injection. In this report, MMP will be calculated by analytical and Parachor methods and the results are compared with experimental data. In the analytical method, initial and injection tie lines are determined by using negative ash calculations for both reservoir oil and injection gas. These tie lines will be corresponded with cross tie lines. MMP is the pressure where the length of one tie line (from initial to injection tie lines) equals zero. In the second method, MMP is calculated according to this fact; that interfacial tension between two phases goes to zero at completely miscibility. The interfacial tension is calculated by the Parachor model. Analytical calculations are performed by PR, SRK and MNM EOS. Results of analytical and Parachor methods are compared with the experimental data of slim tube and vanishing interfacial tension (VIT) methods. Results show superior agreement between calculations and experimental data. Our results indicate that MMP will be reduced significantly, due to the presence of intermediate components of reservoir oil in the injection gas and the similarity between reservoir oil and injection gas.https://sjme.journals.sharif.edu/article_5710_49f2036657becb36e67e82eea6364d5a.pdfSharif University of TechnologySharif Journal of Mechanical Engineering2676-472525No . 5020090923VOLUME FLOW RATE AND BED DEPTH EFFECTS OF CARBON ACTIVE RESIN IN BENZOIC ACID ADSORPTIONVOLUME FLOW RATE AND BED DEPTH EFFECTS OF CARBON ACTIVE RESIN IN BENZOIC ACID ADSORPTION35395711FAS.A.GhorbanDept. of Chemical Engineering Tehran UniversityS. R.RadpourH.AbolghasemiDept. of Chemical Engineering Tehran UniversityM.A.MousavianDept. of Chemical Engineering Tehran UniversityJournal Article20110312The recovery of benzoic acid, as an intermediate and additive component in chemical industries, is a convectional process. Also, benzoic acid is usually removed as a pollutant from wastewater streams and is treated with a fixed-bed, via physical adsorption processes, onto granular activated carbon. In this research work, wastewater is passed onto active carbon in a chromatographic glass tube and the related heat of adsorption is measured by a calorimeter. The results show that this adsorption is physical, because the amount of heat of adsorption is less than the minimum chemical adsorption. In addition, in the present research work, the bed depth effect of resin and the feed volumetric flow rate have been studied at laboratory scale to determine optimum conditions. Finally, based on experiments and their results, the optimum conditions are determined at a 6 cm bed depth with a granular carbon active resin 30-36 mesh, 0.75 ml/min volume flow rate and a chromatographic glass tube with an inner diameter of 9.5 mm.The recovery of benzoic acid, as an intermediate and additive component in chemical industries, is a convectional process. Also, benzoic acid is usually removed as a pollutant from wastewater streams and is treated with a fixed-bed, via physical adsorption processes, onto granular activated carbon. In this research work, wastewater is passed onto active carbon in a chromatographic glass tube and the related heat of adsorption is measured by a calorimeter. The results show that this adsorption is physical, because the amount of heat of adsorption is less than the minimum chemical adsorption. In addition, in the present research work, the bed depth effect of resin and the feed volumetric flow rate have been studied at laboratory scale to determine optimum conditions. Finally, based on experiments and their results, the optimum conditions are determined at a 6 cm bed depth with a granular carbon active resin 30-36 mesh, 0.75 ml/min volume flow rate and a chromatographic glass tube with an inner diameter of 9.5 mm.https://sjme.journals.sharif.edu/article_5711_a230dd480da82485b7e795739a56fcce.pdfSharif University of TechnologySharif Journal of Mechanical Engineering2676-472525No . 5020090923UNSTEADY SOLUTION OF THE LINEAR AND NONLINEAR PRESSURE EQUATION IN SINGLE-PHASE OIL RESERVOIRS,
USING THE GREEN ELEMENT METHODUNSTEADY SOLUTION OF THE LINEAR AND NONLINEAR PRESSURE EQUATION IN SINGLE-PHASE OIL RESERVOIRS,
USING THE GREEN ELEMENT METHOD41455712FAE.DelijaniDept. of Chemical and Petroleum Engineering
Sharif University of TechnologyS.M. R.PishvaieDept. of Chemical and Petroleum Engineering
Sharif University of TechnologyJournal Article20071016In this study, numerical solutions to one dimensional transient linear and nonlinear oil flow in both homogeneous and heterogeneous media are achieved, based on the newly developed Green Element Method (GEM). GEM is a new numerical method based on a singular theory of the boundary element method. However, utilizing the discretization feature of finite element methods leads to forming a sparse and banded global matrix, which is easier to solve.Solution procedure in this method commences by formation of free space green function and conversion of original partial differential equation and implementation of boundary conditions. By applying GEM, some examples of linear and nonlinear flow are solved and the results are compared with the available analytical solution. The comparison shows good agreement between them.In this study, numerical solutions to one dimensional transient linear and nonlinear oil flow in both homogeneous and heterogeneous media are achieved, based on the newly developed Green Element Method (GEM). GEM is a new numerical method based on a singular theory of the boundary element method. However, utilizing the discretization feature of finite element methods leads to forming a sparse and banded global matrix, which is easier to solve.Solution procedure in this method commences by formation of free space green function and conversion of original partial differential equation and implementation of boundary conditions. By applying GEM, some examples of linear and nonlinear flow are solved and the results are compared with the available analytical solution. The comparison shows good agreement between them.https://sjme.journals.sharif.edu/article_5712_3b092c35c54fdca31710403400dd1511.pdfSharif University of TechnologySharif Journal of Mechanical Engineering2676-472525No . 5020090923Deep desulfurization reaction kinetics for hydrogen-gasoline cutting oilDeep desulfurization reaction kinetics for hydrogen-gasoline cutting oil47535713FAHamidGanji-Journal Article20071007Pdydhyy adverse impacts of oil pollution with serious and destructive on the environment and human health. Since one of the main sulfur compounds Lvdhknndhhay oil refinery and one of the most important are the objectives in this study a systematic review in order to determine the reaction kinetics of hydrogen desulfurization) HDS diesel oil cut using a commercial catalyst was NHS $ -204 $. Reactive tests in a tiny bed temperature Qtrhyy $ 360-380 ^ degree C $, pressure and velocity space bar 70-55) LHSV (h $ ^ {-1} $ 2-0.5 done. According to the desulfurization especially derivatives of Tyvfnha Dybnzvtyvfny Bnzvtyvfny and is difficult and comes in deep desulfurization, so here the reaction kinetics (HDS) for the article Dybnzvtyvfn and sulfur can form model was determined. The results indicate that the degree of reaction in the feed gasoline HDS Dybnzvtyvfn is equal to 1.4. HDS reaction activation energy was determined as the kcal/mol15.Pdydhyy adverse impacts of oil pollution with serious and destructive on the environment and human health. Since one of the main sulfur compounds Lvdhknndhhay oil refinery and one of the most important are the objectives in this study a systematic review in order to determine the reaction kinetics of hydrogen desulfurization) HDS diesel oil cut using a commercial catalyst was NHS $ -204 $. Reactive tests in a tiny bed temperature Qtrhyy $ 360-380 ^ degree C $, pressure and velocity space bar 70-55) LHSV (h $ ^ {-1} $ 2-0.5 done. According to the desulfurization especially derivatives of Tyvfnha Dybnzvtyvfny Bnzvtyvfny and is difficult and comes in deep desulfurization, so here the reaction kinetics (HDS) for the article Dybnzvtyvfn and sulfur can form model was determined. The results indicate that the degree of reaction in the feed gasoline HDS Dybnzvtyvfn is equal to 1.4. HDS reaction activation energy was determined as the kcal/mol15.https://sjme.journals.sharif.edu/article_5713_962b5285d263a99488ccc6dc87f9d93c.pdfSharif University of TechnologySharif Journal of Mechanical Engineering2676-472525No . 5020090923--565820469FAJournal Article20091110--https://sjme.journals.sharif.edu/article_20469_6e39ef909002d4602663c7dc45729c67.pdfSharif University of TechnologySharif Journal of Mechanical Engineering2676-472525No . 5020090923--585820467FAJournal Article20091110--https://sjme.journals.sharif.edu/article_20467_e8576b07f11cd731f22693b35be43016.pdf