Combustion of Alane and Aluminum with Water for Hydrogen and Thermal Energy Generation
Abstract
The combustion of alane and aluminum with water in its frozen state has been studied experimentally and theoretically. Both nano and micron-sized particles are considered over a broad range of pressure. The linear burning rate and chemical efficiency are obtained using a constant-pressure strand burner and constant- volume cell, respectively. The effect of replacing nano-Al particles by micron-sized Al and alane particles are examined systematically with the additive mass fraction up to 25%. The equivalence ratio is fixed at 0.943. The pressure dependence of the burning rate follows the power law, rb = aPn, with n ranging from 0.41 to 0.51 for all the materials considered. The burning rate decreases with increasing alane concentration whereas it remains approximately constant with cases containing only Al particles. The chemical efficiency ranged from 32% to 83%, depending on the mixture composition and pressure. Thermo-chemical analyses are conducted to provide insight into underlying causes of the decreased burning rate of the alanized compositions. A theoretical model is also developed to explore the detailed flame structure and burning properties. Reasonably good agreement is achieved with experimental observations.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 2010
- Accession Number
- ADA532919
Entities
People
- Dilip Srinivas Sundaram
- Grant A. Risha
- Gregory Young
- Richard A. Yetter
- Terrence L. Connell Jr.
- Vigor Yang
Organizations
- Pennsylvania State University