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nitrogen-concentrations
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Intelligent model for prediction of CO2 - Reservoir oil minimum miscibility pressure
, Article Fuel ; Volume 112 , 2013 , Pages 375-384 ; 00162361 (ISSN) ; Arabloo, M ; Gharagheizi, F ; Mohammadi, A. H ; Sharif University of Technology
2013
Abstract
Multiple contact miscible floods such as injection of relatively inexpensive gases into oil reservoirs are considered as well-established enhanced oil recovery (EOR) techniques for conventional reservoirs. A fundamental factor in the design of gas injection project is the minimum miscibility pressure (MMP), whereas local sweep efficiency from gas injection is very much dependent on the MMP. Slim tube displacements, and rising bubble apparatus (RBA) are two main tests that are used for experimentally determination of MMP but these tests are both costly and time consuming. Hence, searching for quick and accurate mathematical determination of gas-oil MMP is inevitable. The objective of this...
Solid state fermentation for production of chitosan by aspergillus niger
, Article International Journal of Engineering, Transactions B: Applications ; Volume 22, Issue 1 , 2009 , Pages 1-6 ; 1728-144X (ISSN) ; Razavi, J ; Yaghmaei, S ; Sharif University of Technology
Materials and Energy Research Center
2009
Abstract
The effect of Solid State Fermentation (SSF) on Chitosan production by A. niger was investigated. A. niger BBRC 20004 from Biochemical and Bioenvironmental Research Centre of Sharif University of Technology (Tehran, Iran), was grown on corn residue. Chitosan was extracted from the fungal mycelia using hot alkaline and acid treatment. A. niger was incubated for 12 days on corn residue with moisture content of 35 % and 1.12 % of nitrogen. The Chitosan was obtained and 10.9 g/kg of Urea dry residue was added in various amounts to the medium in order to evaluate the effect of the nitrogen concentration in the production of Chitosan. The highest amount of Chitosan obtained by 6.5 g of urea after...