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Hydrogen enriched compressed natural gas (HCNG): A futuristic fuel for internal combustion engines

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Author(s): Nanthagopal Kasianantham | Subbarao Rayapati | Elango Thangavelu | Baskar Ponnusamy | Annamalai Kandasamy

Journal: Thermal Science
ISSN 0354-9836

Volume: 15;
Issue: 4;
Start page: 1145;
Date: 2011;
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Keywords: alternative fuels | hydrogen enriched compressed natural gas | natural gas | performance | combustion and emission

ABSTRACT
Air pollution is fast becoming a serious global problem with increasing population and its subsequent demands. This has resulted in increased usage of hydrogen as fuel for internal combustion engines. Hydrogen resources are vast and it is considered as one of the most promising fuel for automotive sector. As the required hydrogen infrastructure and refueling stations are not meeting the demand, widespread introduction of hydrogen vehicles is not possible in the near future. One of the solutions for this hurdle is to blend hydrogen with methane. Such types of blends take benefit of the unique combustion properties of hydrogen and at the same time reduce the demand for pure hydrogen. Enriching natural gas with hydrogen could be a potential alternative to common hydrocarbon fuels for internal combustion engine applications. Many researchers are working on this for the last few years and work is now focused on how to use this kind of fuel to its maximum extent. This technical note is an assessment of HCNG usage in case of internal combustion engines. Several examples and their salient features have been discussed. Finally, overall effects of hydrogen addition on an engine fueled with HCNG under various conditions are illustrated. In addition, the scope and challenges being faced in this area of research are clearly described.
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