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Investigation of the Catalytic Activity of the Middlings of High-Magnesian Siderites Processing

[ Vol. 10 , Issue. 2 ]

Author(s):

Andrey N. Smirnov, Viktor I. Sysoev* and Svetlana A. Krylova   Pages 136 - 141 ( 6 )

Abstract:


Background: The development of resource and energy effective schemes for processing natural raw materials attracts increasing attention in the last decades. The scheme of the integrated processing of natural high-magnesian siderites (res. of 1 billion tonnes) developed and patented by our team allows obtaining several end products, the main of which are low-magnesian iron ore concentrate (Fetotal ≥ 58-60%, MgO ≤ 6-8%) and high-purity magnesia (MgO ≥ 98%). The middlings of processing high-magnesian siderites accordingly to this technology were found to be catalytically active in several well known reactions.

Objective: So the objective of this research is to test the catalytic possibilities of the middlings of high-magnesian siderites processing in the water gas shift reaction and in the process of coal gasification by carbon dioxide.

Method: The results of the laboratory experiments on the determination of the catalytic activity of the investigated material are presented in the article. Phase composition was determined by electron microscopy and X-Ray diffraction, chemical composition - by X-ray fluorescence and gas chromatography, specific surface - by the low temperature nitrogen adsorption method (BET method).

Results and Conclusions: The middlings of high-magnesian siderites processing exhibit significant catalytic activity in the processes of coal gasification (conversion rate is 3-5 times higher in comparison with non-catalytic process) in the water gas shift reaction (the catalyst allows obtaining full conversion at the reactant load of up to 4000 h-1). The results of the research can be used in the realization of the principles of integrated high-magnesian siderites processing, including the possibility of obtaining an inexpensive catalyst for large-scale production.

Keywords:

Catalytic conversion, coal gasification, ethanol conversion, high-magnesian siderites, iron-magnesian oxide catalyst, integrated processing of iron ores, water gas shift reaction.

Affiliation:

Nosov Magnitogorsk State Technical University, 455000, Magnitogorsk city, Leninskiy prospect 38, Nosov Magnitogorsk State Technical University, 455000, Magnitogorsk city, Leninskiy prospect 38, Nosov Magnitogorsk State Technical University, 455000, Magnitogorsk city, Leninskiy prospect 38



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