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Title: Efficient regeneration of partially spent ammonia borane fuel

Abstract

A necessary target in realizing a hydrogen (H{sub 2}) economy, especially for the transportation sector, is its storage for controlled delivery, presumably to an energy producing fuel cell. In this vein, the U.S. Department of Energy's (DOE) Centers of Excellence (CoE) in Hydrogen Storage have pursued different methodologies, including metal hydrides, chemical hydrides, and sorbents, for the expressed purpose of supplanting gasoline's current > 300 mile driving range. Chemical hydrogen storage has been dominated by one appealing material, ammonia borane (H{sub 3}B-NH{sub 3}, AB), due to its high gravimetric capacity of hydrogen (19.6 wt %) and low molecular weight (30.7 g mol{sup -1}). In addition, AB has both hydridic and protic moieties, yielding a material from which H2 can be readily released. As such, a number of publications have described H{sub 2} release from amine boranes, yielding various rates depending on the method applied. Even though the viability of any chemical hydrogen storage system is critically dependent on efficient recyclability, reports on the latter subject are sparse, invoke the use of high energy reducing agents, and suffer from low yields. For example, the DOE recently decided to no longer pursue the use of NaBH{sub 4} as a H{sub 2} storagemore » material, in part because of inefficient regeneration. We thus endeavored to find an energy efficient regeneration process for the spent fuel from H{sub 2} depleted AB with a minimum number of steps.« less

Authors:
 [1];  [1];  [1];  [2];  [2]
  1. Los Alamos National Laboratory
  2. UNIV OF ALABAMA
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
960522
Report Number(s):
LA-UR-08-06015; LA-UR-08-6015
Journal ID: ISSN 0570-0833; ACIEAY; TRN: US1002056
DOE Contract Number:  
AC52-06NA25396
Resource Type:
Journal Article
Journal Name:
Angewandte Chemie, International Edition in English
Additional Journal Information:
Journal Volume: 48; Journal Issue: 37; Journal ID: ISSN 0570-0833
Country of Publication:
United States
Language:
English
Subject:
37; AMINES; AMMONIA; BORANES; CAPACITY; DELIVERY; DENSITY FUNCTIONAL METHOD; ECONOMY; ENERGY; FUELS; HYDRIDES; HYDROGEN; HYDROGEN STORAGE; MATERIALS; METALS; MOLECULAR WEIGHT; RANGE; REDUCING AGENTS; REGENERATION; SPENT FUELS; STORAGE; TRANSPORTATION SECTOR; VIABILITY

Citation Formats

Davis, Benjamin Lee, Gordon, John C, Stephens, Frances, Dixon, David A, and Matus, Myrna H. Efficient regeneration of partially spent ammonia borane fuel. United States: N. p., 2008. Web.
Davis, Benjamin Lee, Gordon, John C, Stephens, Frances, Dixon, David A, & Matus, Myrna H. Efficient regeneration of partially spent ammonia borane fuel. United States.
Davis, Benjamin Lee, Gordon, John C, Stephens, Frances, Dixon, David A, and Matus, Myrna H. Tue . "Efficient regeneration of partially spent ammonia borane fuel". United States. https://www.osti.gov/servlets/purl/960522.
@article{osti_960522,
title = {Efficient regeneration of partially spent ammonia borane fuel},
author = {Davis, Benjamin Lee and Gordon, John C and Stephens, Frances and Dixon, David A and Matus, Myrna H},
abstractNote = {A necessary target in realizing a hydrogen (H{sub 2}) economy, especially for the transportation sector, is its storage for controlled delivery, presumably to an energy producing fuel cell. In this vein, the U.S. Department of Energy's (DOE) Centers of Excellence (CoE) in Hydrogen Storage have pursued different methodologies, including metal hydrides, chemical hydrides, and sorbents, for the expressed purpose of supplanting gasoline's current > 300 mile driving range. Chemical hydrogen storage has been dominated by one appealing material, ammonia borane (H{sub 3}B-NH{sub 3}, AB), due to its high gravimetric capacity of hydrogen (19.6 wt %) and low molecular weight (30.7 g mol{sup -1}). In addition, AB has both hydridic and protic moieties, yielding a material from which H2 can be readily released. As such, a number of publications have described H{sub 2} release from amine boranes, yielding various rates depending on the method applied. Even though the viability of any chemical hydrogen storage system is critically dependent on efficient recyclability, reports on the latter subject are sparse, invoke the use of high energy reducing agents, and suffer from low yields. For example, the DOE recently decided to no longer pursue the use of NaBH{sub 4} as a H{sub 2} storage material, in part because of inefficient regeneration. We thus endeavored to find an energy efficient regeneration process for the spent fuel from H{sub 2} depleted AB with a minimum number of steps.},
doi = {},
journal = {Angewandte Chemie, International Edition in English},
issn = {0570-0833},
number = 37,
volume = 48,
place = {United States},
year = {2008},
month = {1}
}