Thermodynamic assessments of the Cu-Mn-X (X : Fe, Co) systems

通讯作者地址: Liu, XJ (通讯作者), Xiamen Univ, Coll Chem & Chem Engn, Dept Mat Sci & Engn, Xiamen 361005, Peoples R China 地址: 1. Xiamen Univ, Coll Chem & Chem Engn, Dept Mat Sci & Engn, Xiamen 361005, Peoples R China 2. Tohoku Univ, Grad Sch Engn, Dept Mat Sci, Sendai, Miyagi 9808579 Japan 电子邮件地址: [email protected] thermodynamic assessments of the Cu-Mn binary, Cu-Mn-Fe and Cu-Mn-Co ternary systems were carried out by using CALPHAD (calculation of phase diagrams) method on the basis of the experimental data including the thermodynamic properties and phase equilibria. The Gibbs free energies of the liquid, bcc, fcc, hep, (alpha Mn) and (beta Mn) phases are described by the subregular solution model. The thermodynamic parameters of the Cu-Mn binary, Cu-Mn-Fe and Cu-Mn-Co ternary systems have been optimized for reproducing the experimental results in each system, respectively. An agreement between the calculated results and experimental data is obtained. (C) 2006 Published by Elsevier B.V

Advances in the reduction of the costs inherent to fossil fuel biodesulfurization towards its potential industrial applications

ABSTRACT: The biodesulfurization (BDS) process consists of the use of microorganisms for the removal of sulfur from fossil fuels. Through BDS it is possible to treat most of the organosulfur compounds recalcitrant to the conventional hydrodesulfurization (HDS), the petroleum industry's solution, at mild operating conditions, without the need for molecular hydrogen or metal catalysts. This technique results in lower emissions, smaller residue production, and less energy consumption, which makes BDS an eco-friendly process that can complement HDS making it more efficient. BDS has been extensively studied and much is already known about the process. Clearly, BDS presents advantages as a complementary technique to HDS; however, its commercial use has been delayed by several limitations both upstream and downstream the process. This study will comprehensively review and discuss key issues, like reduction of the BDS costs, advances, and/or challenges for a competitive BDS towards its potential industrial application aiming ultra-low sulfur fuels.info:eu-repo/semantics/publishedVersio