Engineering Commons^™

Nanocrystalline Amn2o4 (A = Co, Ni, Cu) Spinels For Remediation Of Volatile Organic Compounds—Synthesis, Characterization And Catalytic Performance, Ali Hosseini, Ali Niaei, Darioush Salari, Reza Nabavi

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Nanocrystalline AMn2O4 (A = Co, Ni, Cu) manganite spinels were prepared by using the sol–gel auto combustion method under the same

synthesis conditions and their physico-chemical properties were studied by XRD, UV–vis DRS, SEM, BET and FTIR. Besides, the reducibility of

oxides was studied by temperature-programmed reduction (TPR). The relationship between the properties and activity of spinels in oxidation of 2-

propanol and toluene was investigated. Among all, nickel manganite exhibited the most promising activity, in which the completed conversion of 2-

propanol and toluene occurred at 250 and 350 8C, respectively. Higher activity of nickel manganite oxide was explained …

Design Optimization Of An Lpg Thermal Cracker For Multiple Objectives, Reza Nabavi, G.P Rangaiah, A Niaei, D Salari

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Ethylene and propylene, building blocks of the petrochemical industries, are mostly produced by steam cracking of hydrocarbons. In our recent work (Nabavi, Rangaiah, Niaei and Salari, Multiobjective Optimization of an Industrial LPG Thermal Cracker using a First Principles Model, Ind. Eng. Chem. Res. 2009, 48, 9523-9533), operation of an industrial liquefied petroleum gas (LPG) cracker was optimized for several sets of two and three objectives. In this work, optimization of an LPG cracker design is investigated for multiple objectives. The objectives considered are maximization of annual ethylene and propylene production, selectivity and run length, and minimization of severity and total …

Multiobjective Optimization Of An Industrial Lpg Thermal Cracker Using A First Principles Model, Reza Nabavi, G.P Rangaiah, Ali Niaei, Dariush Salari

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Thermal cracking of hydrocarbons in the presence of steam is the most important process for the production of ethylene and propylene, which are the raw materials for many petrochemicals. In this work, multiobjective optimization (MOO) of an industrial LPG (liquefied petroleum gas containing mainly propane and butane) thermal cracker is studied using the elitist nondominated sorting genetic algorithm adapted with the jumping gene operator, NSGA-II-aJG. A first principles model based on free radical mechanism for LPG thermal cracking is employed for optimization. Several bi- and triobjective optimization problems are solved; these problems involved maximization of annual ethylene/propylene production, selectivity and …

Investigation Of Coke Deposition And Coke Inhibition By Organosulfur Compounds In The Pyrolysis Of Naphtha In The Jet Stirred Reactor System, D Salari, A Niaei, J Towfighi, P Panahi, Reza Nabavi

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No abstract provided.