Abstract

A mixture of [Emim][EtSO4]-HAN is a potential propellant suitable in a multi-mode chemical-electric microtube-electrospray micro propulsion system. This paper reports experimental mass spectrum results for this liquid when electro sprayed in a 50 μm capillary emitter. Mass spectra from 0-600 amu were obtained over a variety of angles and flow rates from 2 pL/sec to 3 nL/sec in both cation and anion extraction mode. Effects of flow rate and angular orientation on the spectra agree well with literature. Results show at least three of the four monomer species are emitted, along with numerous other species, some of which have been identified. Results also show, for the first time, emission of both proton-transferred covalent species paired with both ionic species for HAN. Also, because the liquid is a mixture, swapping of anions and cations between constituents is observed. This swapping is most evident in anion mode, where numerous forms of HAN ([HNO3], 2[HNO3], 2[HA-H], and [HAN]) appear in the spectra attached with [EtSO4]-. Numerous peaks in the spectra remain unidentified but are speculated to be impurities and fragments.

Department(s)

Mechanical and Aerospace Engineering

Publication Status

Full Access

Comments

National Aeronautics and Space Administration, Grant NNM15AA09A

International Standard Book Number (ISBN)

978-162410570-8

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2024 American Institute of Aeronautics and Astronautics, All rights reserved.

Publication Date

01 Jan 2018

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