Alumina-Supported Nickel Oxide as Oxygen Carrier in a Chemical Looping Combustion of Hydrocarbon Fuel
| Main Author: | Adeyinka Sikiru YUSUFF |
|---|---|
| Format: | Article Journal |
| Terbitan: |
, 2014
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/897968 |
Daftar Isi:
- 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).