A mathematical model is developed and tested with plant data for the ammonia cold shot converter of Razi Petrochemical Complex. The model is based on a material and energy balance in a differential element of beds and is subjected to the assumptions of uniform distribution of temperature and composition through a general cross section and negligible mass and heat transfer in axial direction. Th...

Integrated Fixed-Film/Activated Sludge (IFAS) technologies have been gaining wide popularity as an innovative and efficient treatment process for achieving nitrification in refining and petro-chemical wastewater treatment plants. IFAS technologies are sometimes referred to as Hybrid systems as the process combines the benefits of fixed film systems into the suspended growth activated sludge pro...

background petro-clival, clival and spheno-petro-clival tumours are still a neurosurgical challenge. usually, the classical skull base transpetrous approaches are employed, although they are burdened by an important rate of morbidity, and a very low rate of radical removal is reported. conclusions anterior transoral and transsphenoidal approaches are indicated for clival and spheno-petro-clival...

High-Throughput Characterization of Surface Segregation in CuxPd1 x Alloys Deepika Priyadarshini, Petro Kondratyuk, Yoosuf N. Picard, Bryan D. Morreale, Andrew J. Gellman, and James B. Miller* National Energy Technology Laboratory, U.S. Department of Energy, Pittsburgh, Pennsylvania 15236, United States Department of Chemical Engineering and Department of Materials Science and Engineering, Carn...

Background: Petro-clival, clival and spheno-petro-clival tumours are still a neurosurgical challenge. Usually, the classical skull base transpetrous approaches are employed, although they are burdened by an important rate of morbidity, and a very low rate of radical removal is reported. Objectives: We present our indications and results with minimally invasive transnasal and transoral approache...

1Faculty of Chemical Engineering, Babol University of Technology, PO Box, 484, Babol, Iran 2Department of Chemical Engineering, Faculty of Chemical Engineering and Environmental Protection,“Gheorghe Asachi” Technical University of Iaşi, Str. Prof. Dr. Doc. DimitrieMangeron, nr. 73, 700050, Iaşi, Romania 3Department of Computer Science and Engineering, Faculty of Automatic Control and Computer E...

– The rapidly depleting conventional petroleum resources have promoted research for alternative fuels for internal combustion engines. Among various possible options, fuels derived from triglycerides (vegetable oils/animal fats) present promising ‘‘greener’’ substitutes for fossil fuels. Vegetable oils, due to their agricultural origin, are able to reduce net CO2 emissions to the atmosphere alo...

Effective Human Reliability Analysis (HRA) requires both a qualitative analysis of potential human errors and a quantitative assessment of the likelihood of those errors. One of the main conclusions from an International HRA Empirical Study is the importance of qualitative analysis when performing HRA. Although qualitative data collection is relatively well established for HRA in the nuclear in...