حسین آتشی
دانشکده مهندسی شهید نیکبخت، دانشگاه سیستان و بلوچستان، زاهدان، ایران
[ 1 ] - مدل‌سازی تبدیل گاز سنتز و بررسی درصد تبدیل هیدروژن و منوکسیدکربن توسط شبکه عصبی براساس آزمایشات تجربی در راکتور بستر ثابت
در این پژوهش، براساس داده‌ها و آزمایشات تجربی به بررسی درصد تبدیل هیدروژن و منوکسیدکربن و طراحی مدل آنها براساس طراحی آزمایش و شبکه عصبی پرداخته شد. داده‌های آزمایشگاهی براساس پنج متغیر ورودیو براساس طراحی مکعب مرکزی تعیین گردید. این پنج متغیر موثر عبارتند از: دما، فشار راکتور، نسبت هیدروژن به منوکسید کربن در خوراک، فشار جزئی هیدروژن و منوکسید کربن در راکتور. شرایط عملیاتی راکتور، دما ( oC340-3...
[ 2 ] - Determination of the Deactivation Model of Iron-potassium/γ-Al2O3 Catalyst in a Fixed Bed Reactor
Catalyst activity and performance are the most important factors for selecting a catalyst in different processes. The Fischer-Tropsch synthesis is a very important synthesis that extensive action has been taken place to increase the activity of its catalysts in the recent century. Deactivation of the catalysts of the process is influenced by many factors, among which coking and sintering have c...
[ 3 ] - Toward the Development of a Robust Kinetic Model for the Cobalt Fischer-Tropsch Catalyst Lifetime Using a Novel Sigmoidal Pattern
Although catalyst deactivation rate greatly varies depending on many factors, including the catalyst structure, reactor feed composition, and operating conditions; it is usually inevitable. Since catalyst deactivation modeling has so far been poorly addressed in the literature, in the present study, nine experimental sets of cobalt based Fischer-Tropsch catalysts activity-time data were conside...
[ 4 ] - Kinetic Study of Fischer Tropsch Synthesis over co Precipitated Iron-Cerium Catalyst
The kinetic of Fischer-Tropsch synthesis over a co-precipitated Fe-Ce catalyst was investigated in a fixed bed micro reactor. Experimental conditions were varied as follow: reaction pressure 1-15bar, H¬¬¬2/CO feed ratio of 1-3 and space velocity of 3600-5400 h-1 at the temperature range of 270-310°C. 4 models according to the Langmuir-Hinshelwood-Hougen-Watson (LHHW) type rate equation were der...
[ 5 ] - بررسی اثر پیش ماده بر ویژگی و عملکرد کاتالیستی نانوگاما آلومینای تهیه شده با روش انعقاد قطره‌ای
در تهیه گاما آلومینا کروی به روش انعقاد قطره‌ای، همواره از HCl به‌عنوان پیش ماده استفاده می‌شود. در این پژوهش، به مقایسه HCl و HNO3 به‌عنوان دو پیش ماده کلردار و عاری از کلر پرداخته شد. همچنین، بررسی تأثیر حذف کلر از پیش ماده بر فعالیت و ویژگی کاتالیستی گاما آلومینای تهیه شده به روش انعقاد قطره‌ای اختصاص یافت. نمونه‌های تهیه شده با روش‌های پراش پرتو ایکس (XRD)، طیف‌سنجی تفکیک انرژی (...
[ 6 ] - بهینه سازی راندمان استخراج روی ازکنسانتره های حاوی سیلیس
Inhibiting of gel forming, under certain pH and temperature conditions, is one of the most effective ways in leaching process of siliceous zinc concentrates. In order to provide the crucial conditions for extracting zinc from siliceous zinc concentrates, the variables, e.g. temperature, pH, time duration, rotation speed of mixer and the remaining time which are known to affect the leaching proc...
[ 7 ] - The Effects of Potassium Promoter on the Syngas Conversion of Cobalt Catalysts (TECHNICAL NOTE)
The effects of potassium promoter for production of heavy hydrocarbons from syngas with silica- supported cobalt catalysts has been studied. After preparing the catalysts in accordance with the sol-gel method, they were subjected to various tests by using a small steely micro-reactor and capable of operating in diversified situations, such as stable temperature range, flow rate, space velocity,...
[ 8 ] - Determination of the Product Selectivity Model from the Fischer Tropsch Synthesis in a Fixed Bed Reactor
The Fischer-Tropsch synthesis is a catalytic process that can produce a fuel similar to fossil fuels by using primary sources such as agricultural waste and carbon sources that can convert into synthesis gas by superheated steam. All fuel derivatives can be supplied through the Fischer-Tropsch reaction. The synthesis produces a variety of hydrocarbons via parallel and sequential reactions. Howe...
نویسندگان همکار