Thermal and electrolytic decomposition and ignition of han-water solutions

Prashant Khare, Vigor Yang, Hua Meng, Grant A. Risha, Richard A. Yetter

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Thermal and electrolytic decomposition and ignition of water solutions of hydroxylammonium nitrate (HAN, [NH3OH]+[NO3]-) are investigated. Experiments are conducted to demonstrate the feasibility of electrolytic ignition for HAN-based ionic liquid propellants. As a consequence of electrolysis, the propellant decomposes to NH2OH, HNO3, HONO, HNO, N2O, N2, NO, NO2, H2O, H2(g), and O2(g). These species then initiate a series of gas phase reactions, governed by the H-O-N kinetics scheme, and lead to ignition. Electrochemical mechanisms are established and incorporated into an existing chemical kinetics scheme for thermal decomposition of HAN-water solutions. The analysis treats the liquid and gas phases separately, and matches their respective processes at the interfacial boundary to determine the overall decomposition and ignition characteristics. Results are benchmarked against experimental data for the species evolution in the condensed phase, as well as laser-induced ignition delay of 13 M HAN-water solution. The effects of electric current (0-2.5 A), propellant volume (0.1-0.3 cc), initial temperature (300-450 K), and HAN concentration (9-13 M) on the ignition behaviors are investigated systematically. The ignition delay decreases with increasing electric current as a power-law function:, where A = 3.95 and n = 0.95 for a 0.1 cc 13 M HAN-water solution at an initial condition of 300 K and 1 atm. The exponent n and coefficient A are decreasing functions of the initial temperature. For a given power, decreasing the initial volume of HAN-water solution increases the current density available for electrolysis, and expedites the ignition process. The work represents the first theoretical study of its kind on this topic.

Original languageEnglish (US)
Pages (from-to)1065-1078
Number of pages14
JournalCombustion science and technology
Volume187
Issue number7
DOIs
StatePublished - Jul 3 2015

Fingerprint

ignition
thermal decomposition
Ignition
Decomposition
decomposition
Water
water
propellants
Electric currents
electrolysis
Propellants
electric current
Electrolysis
Gases
vapor phases
Liquid propellants
Ionic Liquids
Hot Temperature
Ionic liquids
Reaction kinetics

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Physics and Astronomy(all)

Cite this

@article{21e90bf3aba249129d465f2b2d65d920,
title = "Thermal and electrolytic decomposition and ignition of han-water solutions",
abstract = "Thermal and electrolytic decomposition and ignition of water solutions of hydroxylammonium nitrate (HAN, [NH3OH]+[NO3]-) are investigated. Experiments are conducted to demonstrate the feasibility of electrolytic ignition for HAN-based ionic liquid propellants. As a consequence of electrolysis, the propellant decomposes to NH2OH, HNO3, HONO, HNO, N2O, N2, NO, NO2, H2O, H2(g), and O2(g). These species then initiate a series of gas phase reactions, governed by the H-O-N kinetics scheme, and lead to ignition. Electrochemical mechanisms are established and incorporated into an existing chemical kinetics scheme for thermal decomposition of HAN-water solutions. The analysis treats the liquid and gas phases separately, and matches their respective processes at the interfacial boundary to determine the overall decomposition and ignition characteristics. Results are benchmarked against experimental data for the species evolution in the condensed phase, as well as laser-induced ignition delay of 13 M HAN-water solution. The effects of electric current (0-2.5 A), propellant volume (0.1-0.3 cc), initial temperature (300-450 K), and HAN concentration (9-13 M) on the ignition behaviors are investigated systematically. The ignition delay decreases with increasing electric current as a power-law function:, where A = 3.95 and n = 0.95 for a 0.1 cc 13 M HAN-water solution at an initial condition of 300 K and 1 atm. The exponent n and coefficient A are decreasing functions of the initial temperature. For a given power, decreasing the initial volume of HAN-water solution increases the current density available for electrolysis, and expedites the ignition process. The work represents the first theoretical study of its kind on this topic.",
author = "Prashant Khare and Vigor Yang and Hua Meng and Risha, {Grant A.} and Yetter, {Richard A.}",
year = "2015",
month = "7",
day = "3",
doi = "10.1080/00102202.2014.993033",
language = "English (US)",
volume = "187",
pages = "1065--1078",
journal = "Combustion Science and Technology",
issn = "0010-2202",
publisher = "Taylor and Francis Ltd.",
number = "7",

}

Thermal and electrolytic decomposition and ignition of han-water solutions. / Khare, Prashant; Yang, Vigor; Meng, Hua; Risha, Grant A.; Yetter, Richard A.

In: Combustion science and technology, Vol. 187, No. 7, 03.07.2015, p. 1065-1078.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Thermal and electrolytic decomposition and ignition of han-water solutions

AU - Khare, Prashant

AU - Yang, Vigor

AU - Meng, Hua

AU - Risha, Grant A.

AU - Yetter, Richard A.

PY - 2015/7/3

Y1 - 2015/7/3

N2 - Thermal and electrolytic decomposition and ignition of water solutions of hydroxylammonium nitrate (HAN, [NH3OH]+[NO3]-) are investigated. Experiments are conducted to demonstrate the feasibility of electrolytic ignition for HAN-based ionic liquid propellants. As a consequence of electrolysis, the propellant decomposes to NH2OH, HNO3, HONO, HNO, N2O, N2, NO, NO2, H2O, H2(g), and O2(g). These species then initiate a series of gas phase reactions, governed by the H-O-N kinetics scheme, and lead to ignition. Electrochemical mechanisms are established and incorporated into an existing chemical kinetics scheme for thermal decomposition of HAN-water solutions. The analysis treats the liquid and gas phases separately, and matches their respective processes at the interfacial boundary to determine the overall decomposition and ignition characteristics. Results are benchmarked against experimental data for the species evolution in the condensed phase, as well as laser-induced ignition delay of 13 M HAN-water solution. The effects of electric current (0-2.5 A), propellant volume (0.1-0.3 cc), initial temperature (300-450 K), and HAN concentration (9-13 M) on the ignition behaviors are investigated systematically. The ignition delay decreases with increasing electric current as a power-law function:, where A = 3.95 and n = 0.95 for a 0.1 cc 13 M HAN-water solution at an initial condition of 300 K and 1 atm. The exponent n and coefficient A are decreasing functions of the initial temperature. For a given power, decreasing the initial volume of HAN-water solution increases the current density available for electrolysis, and expedites the ignition process. The work represents the first theoretical study of its kind on this topic.

AB - Thermal and electrolytic decomposition and ignition of water solutions of hydroxylammonium nitrate (HAN, [NH3OH]+[NO3]-) are investigated. Experiments are conducted to demonstrate the feasibility of electrolytic ignition for HAN-based ionic liquid propellants. As a consequence of electrolysis, the propellant decomposes to NH2OH, HNO3, HONO, HNO, N2O, N2, NO, NO2, H2O, H2(g), and O2(g). These species then initiate a series of gas phase reactions, governed by the H-O-N kinetics scheme, and lead to ignition. Electrochemical mechanisms are established and incorporated into an existing chemical kinetics scheme for thermal decomposition of HAN-water solutions. The analysis treats the liquid and gas phases separately, and matches their respective processes at the interfacial boundary to determine the overall decomposition and ignition characteristics. Results are benchmarked against experimental data for the species evolution in the condensed phase, as well as laser-induced ignition delay of 13 M HAN-water solution. The effects of electric current (0-2.5 A), propellant volume (0.1-0.3 cc), initial temperature (300-450 K), and HAN concentration (9-13 M) on the ignition behaviors are investigated systematically. The ignition delay decreases with increasing electric current as a power-law function:, where A = 3.95 and n = 0.95 for a 0.1 cc 13 M HAN-water solution at an initial condition of 300 K and 1 atm. The exponent n and coefficient A are decreasing functions of the initial temperature. For a given power, decreasing the initial volume of HAN-water solution increases the current density available for electrolysis, and expedites the ignition process. The work represents the first theoretical study of its kind on this topic.

UR - http://www.scopus.com/inward/record.url?scp=84928635473&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84928635473&partnerID=8YFLogxK

U2 - 10.1080/00102202.2014.993033

DO - 10.1080/00102202.2014.993033

M3 - Article

AN - SCOPUS:84928635473

VL - 187

SP - 1065

EP - 1078

JO - Combustion Science and Technology

JF - Combustion Science and Technology

SN - 0010-2202

IS - 7

ER -