Selection of Plant Location for a Steel Project by TOPSIS
Issue:
Volume 6, Issue 1, March 2021
Pages:
1-5
Received:
7 January 2021
Accepted:
23 January 2021
Published:
28 January 2021
Abstract: In a complex business environment, the leadership team has to take certain decisions based on several criteria associated with the decision, some of which are quantifiable with real numbers while the remaining may be subjective or qualitative in nature, which may possibly be expressible linguistically or as a subjective comparison, though equally important for the final decision making. Such decision problems are called Multi-Criteria Decision Making (MCDM) problems. There are techniques available to deal with such problems by integrating all the criteria, quantitative or qualitative, in the decision algorithm and arriving at the most suitable alternatives among several choices available, through certain process steps. MCDM problems may be encountered in many areas of business like key project decisions, strategic decisions on inward and outward logistics, marketing decisions, process technology selection, supply chain decisions, marketing strategies, plant layout optimization etc. The major algorithms that can be conveniently applied to crack such decision problems are Analytic Hierarchy Process (AHP), Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) and Weighted Sum Method (WSM). This article will attempt to solve a site selection problem for a Greenfield integrated steel project, considering several key selection criteria and certain alternative locations. For performing this exercise, the article shall use TOPSIS as the algorithm.
Abstract: In a complex business environment, the leadership team has to take certain decisions based on several criteria associated with the decision, some of which are quantifiable with real numbers while the remaining may be subjective or qualitative in nature, which may possibly be expressible linguistically or as a subjective comparison, though equally i...
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Sodium Ethoxide Concentrated Solution Synthesis at Ambient Temperature Using Sodium Hydroxide and Ethanol-90 in Excess
Nambinina Richard Randriana,
Avotra Marson Randrianomenjanahary,
Andry Tahina Rabeharitsara
Issue:
Volume 6, Issue 1, March 2021
Pages:
6-11
Received:
25 March 2021
Accepted:
12 April 2021
Published:
23 April 2021
Abstract: Sodium ethoxide is a specific chemical product of synthesis used in laboratory, thus its presence at the suppliers stays very periodic and on order. It was in that sense that this project to synthesize a concentrated solution of sodium ethoxide got off at ambient temperature, under normal atmospheric pressure in an uncovered beaker using ethanol 90% of purity and sodium hydroxide 99% of purity seeing that the ethanol molecules were in excess in comparison with sodium hydroxide molecules which quantities were all soluble in ethanol. The initial calculated pH was equal to 15.23. In addition, not only an extraction procedure of the concentrated sodium ethoxide was done but also a titration procedure of the concentrated sodium ethoxide solution by hydrochloric acid HCl-0.1N was established and permitted to evaluate kinetic parameters of this synthesis reaction on these experimental conditions. The evaluated molar conversion from the initial quantities of sodium hydroxide was 88.49% after 3h25mn of reaction. It was noticed that the formation of sodium ethoxide was initially very important and very speed confirming the negativity of its standard molar enthalpies. Thus, the initial speed formation of synthesized sodium ethoxide was approximately equal to 0.013 [[mol×l-1×s-1]. Once synthesized, the total crystallization of the concentrated sodium ethoxide was tried with an evaluation of its porosity by immersion in dichloromethane giving a value in the order of 54.60%.
Abstract: Sodium ethoxide is a specific chemical product of synthesis used in laboratory, thus its presence at the suppliers stays very periodic and on order. It was in that sense that this project to synthesize a concentrated solution of sodium ethoxide got off at ambient temperature, under normal atmospheric pressure in an uncovered beaker using ethanol 90...
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