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Title: Rapid starting methanol reactor system

Abstract

The invention relates to a methanol-to-hydrogen cracking reactor for use with a fuel cell vehicular power plant. The system is particularly designed for rapid start-up of the catalytic methanol cracking reactor after an extended shut-down period, i.e., after the vehicular fuel cell power plant has been inoperative overnight. Rapid system start-up is accomplished by a combination of direct and indirect heating of the cracking catalyst. Initially, liquid methanol is burned with a stoichiometric or slightly lean air mixture in the combustion chamber of the reactor assembly. The hot combustion gas travels down a flue gas chamber in heat exchange relationship with the catalytic cracking chamber transferring heat across the catalyst chamber wall to heat the catalyst indirectly. The combustion gas is then diverted back through the catalyst bed to heat the catalyst pellets directly. When the cracking reactor temperature reaches operating temperature, methanol combustion is stopped and a hot gas valve is switched to route the flue gas overboard, with methanol being fed directly to the catalytic cracking reactor. Thereafter, the burner operates on excess hydrogen from the fuel cells.

Inventors:
 [1];  [2];  [3]
  1. (38 Berkshire St., Swampscott, MA 01907)
  2. (39 Nancy Ave., Peabody, MA 01960)
  3. (12 Old Cart Rd., Hamilton, MA 01936)
Publication Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM
OSTI Identifier:
865168
Patent Number(s):
US 4473622
Assignee:
Chludzinski, Paul J. (38 Berkshire St., Swampscott, MA 01907);Dantowitz, Philip (39 Nancy Ave., Peabody, MA 01960);McElroy, James F. (12 Old Cart Rd., Hamilton, MA 01936) LANL
DOE Contract Number:
W-7405-ENG-36
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
rapid; starting; methanol; reactor; relates; methanol-to-hydrogen; cracking; fuel; cell; vehicular; power; plant; particularly; designed; start-up; catalytic; extended; shut-down; period; inoperative; overnight; accomplished; combination; direct; indirect; heating; catalyst; initially; liquid; burned; stoichiometric; slightly; lean; air; mixture; combustion; chamber; assembly; hot; gas; travels; flue; heat; exchange; relationship; transferring; wall; indirectly; diverted; bed; pellets; directly; temperature; reaches; operating; stopped; valve; switched; route; overboard; fed; thereafter; burner; operates; excess; hydrogen; cells; catalytic cracking; fuel cell; transferring heat; hot combustion; cell power; combustion chamber; fuel cells; heat exchange; power plant; operating temperature; hot gas; flue gas; exchange relationship; combustion gas; chamber wall; catalyst bed; air mixture; exchange relation; gas chamber; reactor assembly; methanol reactor; cracking reactor; cracking catalyst; indirect heating; gas valve; catalyst chamber; excess hydrogen; fed directly; vehicular power; indirect heat; cell vehicular; direct heat; /429/48/201/422/

Citation Formats

Chludzinski, Paul J., Dantowitz, Philip, and McElroy, James F. Rapid starting methanol reactor system. United States: N. p., 1984. Web.
Chludzinski, Paul J., Dantowitz, Philip, & McElroy, James F. Rapid starting methanol reactor system. United States.
Chludzinski, Paul J., Dantowitz, Philip, and McElroy, James F. Sun . "Rapid starting methanol reactor system". United States. doi:. https://www.osti.gov/servlets/purl/865168.
@article{osti_865168,
title = {Rapid starting methanol reactor system},
author = {Chludzinski, Paul J. and Dantowitz, Philip and McElroy, James F.},
abstractNote = {The invention relates to a methanol-to-hydrogen cracking reactor for use with a fuel cell vehicular power plant. The system is particularly designed for rapid start-up of the catalytic methanol cracking reactor after an extended shut-down period, i.e., after the vehicular fuel cell power plant has been inoperative overnight. Rapid system start-up is accomplished by a combination of direct and indirect heating of the cracking catalyst. Initially, liquid methanol is burned with a stoichiometric or slightly lean air mixture in the combustion chamber of the reactor assembly. The hot combustion gas travels down a flue gas chamber in heat exchange relationship with the catalytic cracking chamber transferring heat across the catalyst chamber wall to heat the catalyst indirectly. The combustion gas is then diverted back through the catalyst bed to heat the catalyst pellets directly. When the cracking reactor temperature reaches operating temperature, methanol combustion is stopped and a hot gas valve is switched to route the flue gas overboard, with methanol being fed directly to the catalytic cracking reactor. Thereafter, the burner operates on excess hydrogen from the fuel cells.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 1984},
month = {Sun Jan 01 00:00:00 EST 1984}
}

Patent:

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  • The invention relates to a methanol-to-hydrogen cracking reactor for use with a fuel cell vehicular power plant. The system is particularly designed for rapid start-up of the catalytic methanol cracking reactor after an extended shut-down period, i.e., after the vehicular fuel cell power plant has been inoperative overnight. Rapid system start-up is accomplished by a combination of direct and indirect heating of the cracking catalyst. Initially, liquid methanol is burned with a stoichiometric or slightly lean air mixture in the combustion chamber of the reactor assembly. The hot combustion gas travels down a flue gas chamber in heat exchange relationshipmore » with the catalytic cracking chamber transferring heat across the catalyst chamber wall to heat the catalyst indirectly. The combustion gas is then diverted back through the catalyst bed to heat the catalyst pellets directly. When the cracking reactor temperature reaches operating temperature, methanol combustion is stopped and a hot gas valve is switched to route the flue gas overboard, with methanol being fed directly to the catalytic cracking reactor. Thereafter, the burner operates on excess hydrogen from the fuel cells.« less
  • A method is described for starting a spark-ignited methanol-fueled engine at low ambient temperatures comprising: forming atomized droplets of methanol and introducing them into a stream of ambient air to form an air-methanol mixture, passing the stream into contact with a catalyst that promotes both the oxidation and dissociation of methanol, the proportion of methanol to air initially being adjusted to promote oxidation to heat the catalyst to a temperature promoting dissociation and the proportion then being increased to provide methanol for dissociation productive of hydrogen and carbon monoxide, and introducing the hydrogen and carbon monoxide into the engine asmore » a fuel for engine start-up.« less
  • This patent describes a method of terminating, under emergency conditions, an olefin polymerization reaction conducted in the presence of a transition metal-based catalyst system in a substantially vertical gas phase reactor comprising a reactants inlet at the first end thereof and a venting means at the second end thereof to maintain the temperature of the reaction below the sintering temperature of the polymer. The method comprises opening the venting means and injecting an amount of a kill gas into the reaction medium in the reactor sufficient to terminate the reaction.
  • A thermoacoustic engine-driven system with a hot heat exchanger, a regenerator or stack, and an ambient heat exchanger includes a side branch load for rapid stopping and starting, the side branch load being attached to a location in the thermoacoustic system having a nonzero oscillating pressure and comprising a valve, a flow resistor, and a tank connected in series. The system is rapidly stopped simply by opening the valve and rapidly started by closing the valve.
  • A gas turbine power plant is provided with an industrial gas turbine which drives a generator coupled to a power system through a breaker. The turbine-generator plant is operated by a hybrid control system having digital function capability during sequenced startup, synchronizing, load buildup and steady state load, and shutdown operations. The control system also contains monitoring and protective subsystems which function through all stages of operation, with redundancy and permissive features which maximize turbine availability.