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۱A simple and fast method for estimation of water content in alkanolamine solutions by refractometric method
نویسنده(ها): ، ، ،
اطلاعات انتشار: چهاردهمین همایش بین المللی نفت، گاز و پتروشیمی، سال
تعداد صفحات: ۶
Aqueous alkanolamine solution are widely used for the removal of acid gases such as CO2 and H2S from gas streams. Examples of such streams include natural gases , synthesis gases from the gasification of coal and heavy oils, and tail gases from sulfur plants and petroleum chemical plants in industry amount of water decreases because of heat of process and it causes decrement in efficiency of amine plant for gas sweetening process and we should estimate water content of amine solutions. in this paper we have report the new experimental data for n of various aqueous alkanolamine solutions at 293.15 K and atmospheric pressure. these alkanolamine consist of triethanolamone TEA, mthyl diethanolamine MDEA, diethanolamine DEA , monoethanolamine MEA, and diisopropanolamine DIPA. by using of this method first we obtan calibration curve for alkanolmanie solutions and then we able to estimate the water content of solutions in few seconds. the analysis of alkanolamine solutions was carried out with a refractometer model KEM620 A and results show that we can estimate amount of water in aqueous alkanolamine solutions in short time by refratometric method.<\div>

۲OXIDATIVE COUPLING OF METHANE TO ETHYLENE OVER PEROVSKITE CATALYSTS
اطلاعات انتشار: چهاردهمین همایش بین المللی نفت، گاز و پتروشیمی، سال
تعداد صفحات: ۷
In iran and the other petroleum and gas enriching countries . A considerable amount of gas is combusted wastefully without using them profitably . Now a day while the world petroleum resources are diminishing incrasingly instead nes sources of gas are explored at a large amoun.therefore it is valuable commit investigation on gas conversion to the value–added product such as ethylene which is the most important raw material in petrochemical industry . the results from reactor tests shoewed that perovskite–type catalysts , can be used in this reation. for example , by varying the parameteresof the reactor their crystalline structures remain unchanged. in this paper the variation of temperature, flow rate, inert gas composition in feed and CH4\O2 have been studied for this reaction, and finally, the best catalyst have been selected among the prepared catalyst with perovskite structures.<\div>

۳Modified γ–Al2O3 and its application for FT synthesis
نویسنده(ها): ، ، ،
اطلاعات انتشار: پانزدهمین کنگره ملی مهندسی شیمی ایران، سال
تعداد صفحات: ۵
In this research, γ–Alumina was pretreated in the presence of phosphoric acid–ethanol, and then used to prepare the supported cobalt catalysts for Fischer–Tropsch synthesis (FTS). Different concentrations of phosphoric acid were applied for pretreatment of γ–Alumina to modify it's surface properties. The catalysts were prepared by incipient wetness impregnation of the cobalt precursor, and deionized water was used as preparation medium. The reduction degree and dispersion of γ–alumina–supported cobalt catalyst were improved through this pretreatment. The obtained catalysts were characterized by FTIR, NH3–TPD, XRD, TPR, TEM and H2 chemisorption. These characterizations clearly showed the changesof morphology (surface area, pore volume, pore size distribution and crystallite phase) as well as chemical properties (e.g. acidity) of the supports. Optimize the support pretreatment parameters exhibited significant catalyst's stability and activity, applying to FTS reaction in CSTR reactor during 320 h test.<\div>

۴Solvent Pre–treated Effects of Carbon Nanotube–supported Cobalt Catalysts on Activity and Selectivity of Fischer–Tropsch Synthesis
اطلاعات انتشار: Journal of Petroleum Science and Technology، ششم،شماره۱، ۲۰۱۶، سال
تعداد صفحات: ۱۴
In this study, the effect of preparation technique of carbon nanotube (CNT)–supported cobalt catalysts on the activity and selectivity of Fischer–Tropsch synthesis (FTS) was studied. Different concentrations of acetic acid were used for the pretreatment of the catalyst support to modify the surface properties of CNT. This modification improved the reduction degree and dispersion of supported cobalt simultaneously. The catalysts were prepared by incipient wetness impregnation of the cobalt precursor, and deionized water was used as the preparation medium. The obtained catalysts were characterized by XRD, TPR, TEM, and H2 chemisorption. The catalysts prepared under the optimum conditions exhibited significant stability and activity for FTS reaction in a CSTR reactor during 120 hr of experimental tests.
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