Hydrogen storage capacity of tetrahydrofuran and tetra-n-butylammonium bromide hydrates at favorable thermodynamic conditions

Date

2014-08

Contributor

Advisor

Department

Instructor

Depositor

Speaker

Researcher

Consultant

Interviewer

Narrator

Transcriber

Annotator

Journal Title

Journal ISSN

Volume Title

Publisher

University of Hawaii at Manoa

Volume

Number/Issue

Starting Page

Ending Page

Alternative Title

Abstract

An exploratory investigation was conducted to evaluate the feasibility of employing binary hydrates as a medium for H2 storage. Two reagents, tetrahydrofuran, (THF) and tetra-n-butylammonium bromide (TBAB), which had been reported previously to have potential to form binary hydrates with H2 at favorable conditions (i.e., low pressures and high temperatures), were investigated. A scale-up facility was employed to quantify the hydrogen storage capacity of THF binary hydrate. Gas chromatograph (GC) and pressure drop analyses indicated that the weight percentages of H2 in hydrate were less than 0.1%. This is well below the current USDOE target of 5.5 wt. % for transportation applications. To summarize, the major conclusions of this investigation are: H2 can be stored in binary hydrates at relatively modest pressures and temperatures which are probably feasible for transportation applications. The storage capacity of H2 in binary hydrate formed from aqueous solutions of THF over a concentration range extending from 2.78 to 8.34 mol % and at temperatures above 263 K and pressures below 11 MPa was < 0.1 wt. %. Under-saturated solutions of THF appeared to have the highest H2 storage capacity.

Description

Keywords

hydrogen storage capacity, tetrahydrofuran, tetra-n-butylammonium bromide, Hydrates

Citation

Extent

Format

Geographic Location

Time Period

Related To

Theses for the degree of Master of Science (University of Hawaii at Manoa). Mechanical Engineering.

Related To (URI)

Table of Contents

Rights

All UHM dissertations and theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission from the copyright owner.

Rights Holder

Local Contexts

Email libraryada-l@lists.hawaii.edu if you need this content in ADA-compliant format.