Alumina-Supported Nickel Oxide as Oxygen Carrier in a Chemical Looping Combustion of Hydrocarbon Fuel

Adeyinka, Sikiru Yusuff (2014) Alumina-Supported Nickel Oxide as Oxygen Carrier in a Chemical Looping Combustion of Hydrocarbon Fuel. JOURNAL OF BIOPROCESSING AND CHEMICAL ENGINEERING, 2 (2). pp. 1-6. ISSN : 2348 –3768

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Abstract

Chemical looping combustion has been identified as a promising combustion process with inherent capturing of carbon dioxide and electricity generation. This novel technology involves the use of solid material capable of supplying oxygen and facilitating the combustion operation in absence of nitrogen diluted air. This solid material is known as oxygen carrier. This study attempts to review the preparation and characterization of nickel- based oxygen carrier supported on alumina (NiO/Al2O3). Its Preparation involves evaluation or modification of support, contacting the support with impregnating solution, removal of excess solution, drying, calcination and activation. Hence, the characterizations of oxygen carrier are based on its properties (physical and chemical). The development of kinetic model to describe the reduction-oxidation reaction of active component of oxygen carrier (NiO) with hydrocarbon fuel (CH4) and air is also put into consideration. Several assumptions are made to simplify the model. The nucleation and nuclei growth model is used to analyze the kinetic parameters contained in the model. The activation energy (E) could be determined using iso-conversion method based on the assumption that the rate of reaction at a constant extent of reaction is only a function of the temperature. Also, numerical, analytical or graphical solution of rate expression would yield kinetic constant (k).

Item Type: Article
Uncontrolled Keywords: characterization; chemical looping combustion; kinetics; modeling; oxygen carrier.
Subjects: Q Science > Q Science (General)
Q Science > QD Chemistry
T Technology > T Technology (General)
T Technology > TP Chemical technology
Divisions: Faculty of Engineering, Science and Mathematics > School of Chemistry
Depositing User: Mr Tayo Okunlola
Date Deposited: 25 May 2016 10:34
Last Modified: 25 May 2016 10:34
URI: http://eprints.abuad.edu.ng/id/eprint/764

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