مجله فرآیند نو
پیاپی 73 (بهار 1400)

In this study, molybdenum sulfide nanocatalyst supported graphene oxide was synthesized by ultrasonic method and was used for oxidative desulfurization of gas condensate with initial sulfur content of 2850 ppm. The nanocatalyst was evaluated using XRD, BET, TPD, XPS, Raman spectroscopy and reactor tests. The results showed that M9-GOnanocatalyst with 9%by weight of molybdenum metal, 98% desulfurization yield of gas condensate in operation conditions (7500C, oxidative agent 3%, and reaction time 90 min with acetonitrile solvent) was obtained.  M9-GO catalyst also showed good activity and stability after nine step, recovery after extraction-oxidation reaction. Also, the effect of surface area, pore diameter and catalyst acidity on the performance of oxidative desulfurization activity has been investigated. The results showed that the higher the surface area, porosity, and catalyst acidity, the higher the efficiency of oxidative desulfurization process.

The aim of this study was to investigate the performance of environmental management in the form of control of industrial effluent pollutants and also to investigate the quantitative and qualitative performance of two industrial wastewater treatment systems (water treatment system and oil recycling). For this purpose, various studies and experiments were performed to measure the amount of quantitative and qualitative parameters of effluent (including COD, DO, pH, TSS, CL-, SO42-, etc.) in the treatment systems of the refinery effluent. In this regard, 4 sampling stations were determined in the study area and were conducted in two seasons, cold and hot, in 2017. The results showed that the clarifying system performed well in all measured parameters except CL- and the ROP effluent treatment system could not meet the values of TSS, COD, SO42-, CL- and turbidity in the hot and cold seasons. Set the limit of international standards for wastewater discharge.

Metal organic frameworks (MOFs) with excellent properties have showed good attention for different application especially gas adsorption and separation. In this regard, fabrication of MOF hybrids with carbon based materials is new strategy to upgrade MOF performance. In this study CuBTC (Copper benzene-1, 3, 5 tricarboxylic acid)/graphene oxide (GO) composite was synthesized and characterized by BET, FESEM, XRD and FT-IR techniques. Then CuBTC/GO composite were incorporated into polysulfone (PSF) polymer to prepare mixed matrix membranes (MMMs). The obtained membranes were characterized by FESEM, FT-IR and XRD tests and their gas permeability was measured. It was revealed that CuBTC/GO composite performs well as a filler. 15 wt% loading of CuBTC/GO in PSF presented 80.03 and 70.46 for H2/CH4 and H2/N2, selectivity respectively.

A dividing wall distillation column is a separation technology in the field of process intensification that promises energy and capital savings. Dividing wall columns are applied for separation of mixtures with three and more components, such as hydrocarbons, alcohols, aldehydes, ketones, acetones, and amines. Further, DWCs can be used to conduct azeotropic, extractive and reactive distillation. Scale-up and successful operation of a commercial unit, as well as design, optimization, feasibility and risk reduction in processes require a pilot. These studies indicate that DWC, compared to conventional distillation sequence, can save 20% in equipment investment costs and 30% savings in energy consumption. Most of the studied pilots were reported to have a diameter between 50 and 700 mm and a maximum height of 12 m. The most important points in the design and construction of DWC are vapor split, wall position, number of equilibrium stages, height and diameter of the tower.

In this study, Main purpose is design of fog cooling system in inlet air channel of Abadan oil refinery gas turbine. Abadan oil refinery has seven gas turbines with 29.7 mega watt capacity for each one in ISO condition that their production power will reduce with increase of ambient temperature specially in hot months. Therefore, installation a cooling system for cooling inlet air to gas turbines is necessary. In this manner, for investigation of system performance, equation of continuity, momentum and energy solved for each phase (air and droplet) with usage Eulerian-Lagrangian approach by ANSYS Fluent software in discrete phase model. Results of temperature proration and particle tracking show that by installation fog system, crossing air temperature through channel decrease amount 13.5 degree centigrade and also most of particles have enough time for evaporation and their remainder out from channel with allowable and acceptable diameter. Efficiency of cooling system is 67.5 percentage.

Actually all of the companies aim to export performance improvement. In according to the oil industry situation in Iran's vision and, not having a comprehensive model of Iranian oil products export performance, this research could improve and develop this industry in international markets. The statement was as below: What are the antecedents of Iranian oil products export performance? This research method is quantitative and statistical society includes Iranian oil products export companies. Probable sampling and random sampling method was used in this research. Regarding this quantitative research, a Likert Spectrum Questionnaire of 5-point scale was used to gather information. 19 variables were measured by multiple items and Proposed continuity domain. 57 items were used to measure structures; these cases were used for analyzing the deduction of quantitative evidence: Exploratory factor analysis, Confirmatory factor analysis, Structural equation modeling. All 16 hypotheses were supported. There has not been any comprehensive research about antecedents of export performance in Iranian oil industry according to researcher information. Considering different dimensions of Iran's market, a model of export performance and its antecedents for Iranian oil products was presented in this research.