The need for alternative fuels to replace liquid petroleum-based fuels has been accelerated in recent years by environmental concerns, concerns of shortage of imported liquid hydrocarbon, and congressional prompting. The fact is accepted that natural gas is the cheapest, most domestically abundant, and cleanest burning of fossil fuels. However, socio-economical and technical handicaps associated with the safety and efficiency of on-board fuel storage inhibit its practical use in vehicles as an alternative fuel. A concept is presented for safely storing fuel at low pressures in the form of hydrates in natural gas vehicles. Experimental results lead to gas storage capacities of 143 to 159 volumes/volume. Vehicle travel range could be up to 204 mi. Controlled decomposition rate of hydrates is possible for feeding an automotive vehicle. Upon sudden pressure decrease in the event of a vehicle accident, the rate of release of hydrocarbons from the hydrates at constant temperature is 2.63 to 12.50 percent per min, slow enough to prevent an explosion or a fireball. A model is given for predicting the rates of gas release from hydrates in a vehicle wreck. A storage tank design is proposed and a process is suggested for forming and decomposing hydrates on-board vehicles. A consistent fuel composition is obtained with hydrates.

1.
Blazek, C. F., et al., 1992, “A Thermal Energy Storage System for Adsorbent Low-Pressure Natural Gas Storage,” presented at the International Conference and Exhibition on Natural Gas Vehicles-NGV-92, Go¨tlerborg, Sweden, September 23–25.
2.
Borg, I. Y., 1983, “Evaluation of Research Opportunities in Gas Hydrates,” Report No. UCID-19755 to DOE under Contract No. (DOE): W-7405-ENG-48, Washington, DC.
3.
Carson, B. D., and Katz L. D., 1941, “Natural Gas Hydrates,” AIMME Tech. Pub. No. 1371.
4.
Crow
P.
,
1993
, “
Study sees U.S. Gas Resource Base Steady During 1990–1992
,”
Oil & Gas Journal
, Vol.
91
, No.
25
, pp.
24
24
.
5.
Davidson K. G., 1992, “Natural Gas Vehicles: The Road Ahead,” presented at Chrysler Corporation Solar and Electric 500 Race Weekend, April 25.
6.
Farrell, M. D., 1991, “The Emerging Alternative-Fuel Vehicle Market,” Summary of the twelfth Annual GRI Energy Seminar for GRI Board of Directors and Advisory Council, Ashville, NC, August 12–14.
7.
Geiss, O. R., et al., 1992, “Technical Highlights of the Dodge Compressed Natural Gas Ram Van/Wagon,” SAE Technical Paper Series 921551, Society of Automotive Engineers, Warrendale, PA.
8.
Golovoy
A.
, and
Nichols
J. R.
,
1983
: “
Natural-Gas Powered Vehicles
,”
Chemtech.
, Vol.
6
, pp.
359
363
.
9.
Idelson, H., 1992, “National Energy Strategy Provisions,” Congressional Quarterly, November 28.
10.
King, R. S., 1992a, “The Impact of Natural Gas Composition on Fuel Metering and Engine Operational Characteristics,” SAE Technical Paper Series 920593, Society of Automotive Engineers, Warrendale, PA.
11.
King, R. S., 1992b, “Understanding the Effect of Variations in Natural Gas Composition on Vehicle Operation,” Reprint-92–0052 from Technology Today, Vol. 13, No. 1.
12.
Leiendecker, G. R., 1993, Chrysler Corporation, personal communication, June 17.
13.
Liss, W. E., et al., 1992, “Fuel Issues for Liquefied Natural Gas Vehicles,” SAE Technical Paper Series 922960, Society of Automotive Engineers, Warrendale, PA.
14.
Makogon, Y. F., 1981, Hydrates of Natural Gas, PennWell Books, Tulsa, OK, pp. 1–39, 213–224.
15.
McLaughin, M. C., 1992, “State and Federal Regulations/Federal Clean Air Act,” Proceedings, Second Annual Natural Gas Vehicles Seminars and Exhibits, Newport Beach, CA, May 11–13.
16.
Miller, B., and Strong, E. R. Jr, 1946, “Hydrate Storage of Natural Gas,” American Gas Association Monthly, Feb.
17.
Parent, J. D., 1948, “The Storage of Natural Gas as Hydrate,” Institute of Gas Technology, Chicago, Research Bulletin No. 1, Chicago, IL.
18.
Reed, D., 1992, “Alternative Auto Fuels,” Automotive Engineering, Nov., pp. 74.
19.
Remick, R. J., et al., 1984, “Advanced Onboard Storage Concepts For Natural Gas-Fueled Automotive Vehicles,” Final Report, DOE/NASA/0327-1, NASA CR-17 4655 IGT Project 61067 to Department of Energy, Washington, DC.
20.
Rosen
J.
,
1990
: “
Running on Methane
,”
Mechanical Engineering
, Vol.
112
, No.
5
, pp.
66
71
.
21.
Samsa, M. E., and Gauthier, S. W., 1992, “Potential For Compressed Natural Gas Vehicles in Centrally Fuelled Automobile Truck and Bus Fleet Application,” NGV-’92, Go¨terborg, Sweden, September 22–25.
22.
Sloan
D. E.
,
1991
, “
Natural Gas Hydrates
,”
Journal of Petroleum Technology
, Vol.
43
, No.
12
, pp.
1414
1417
.
23.
Sloan D. E., Jr., 1990, Clathrate Hydrates of Natural Gases, Marcel Dekker Inc., New York, NY, pp. 193–258.
24.
Solomon C., 1993, “Compressed Natural Gas Gets a Shots in Cars,” The WALL STREET JOURNAL, January 5.
25.
Spontak
R. J.
,
1986
, “
Determination of Volumetric Properties for Systems Containing Structure I Gas Hydrates
,”
Industrial Engineering and Chemistry Process Design Development
, Vol.
25
, No.
4
, pp.
1030
1033
.
26.
SRI
,
1991
, “
Alternative Auto Fuels Pose Cost or Technical Challenge
,”
Oil & Gas Journal
, Vol.
89
, No.
49
, pp.
57
61
.
27.
Tse
J. S.
, et al.,
1983
, “
Molecular Dynamics Studies of Ice and Structure I Clathrate Hydrate of Methane
,”
Journal of Physics and Chemistry
, Vol.
87
, pp.
4198
4203
.
28.
Valenti
M.
,
1991
, “
Alternative Fuels: Paving the Way to Energy Independence
,”
Mechanical Engineering
, Vol.
113
, No.
12
, pp.
42
46
.
29.
Wilcox
W. I.
,
Carson
D. B.
, and
Katz
D. L.
,
1941
, “
Natural Gas Hydrates
,”
Industrial and Engineering Chemistry
, Vol.
33
, No.
5
, pp.
662
665
.
30.
Yevi, G. Y., 1994, “Investigation of the Storage of Fuel in Hydrates for Natural-Gas-Powered-Vehicles,” M. S. thesis, Mississippi State University, Mississippi State, MS.
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