Chemical warfare agents and related compounds as fuel for internal combustion engines

Patent metadata

Field	Value
Publication number	US-11098260-B2
Application number	US-201916421450-A
Country	US
Kind code	B2
Filing date	May 23, 2019
Priority date	May 23, 2018
Publication date	Aug 24, 2021
Grant date	Aug 24, 2021

Abstract

Technologies for combusting hazardous compounds such as chemical warfare agents and related compounds are disclosed. In embodiments, the technologies include systems and methods for combusting such compounds in an internal combustion engine, such as a spark ignition internal combustion engine, a diesel engine, or the like. The technologies described herein further include components for treating an exhaust gas stream produced by combustion of hazardous compounds. In embodiments such components include a scrubber that utilizes a scrubbing media such as soil to removing acid gases from the exhaust stream.

First claim

What is claimed is:

1. A combustion system, comprising:
an internal combustion engine; and
a fuel source for providing a fuel to the internal combustion engine, wherein said fuel comprises at least one chemical warfare agent (CWA), CWA precursor or a combination thereof;
wherein said internal combustion engine is configured to combust said fuel to produce an exhaust gas stream;
wherein said CWA comprises one or more of the following:
O-Alkyl alkyl (Me, Et, n-Pr or i-Pr)-phosphorofluoridates; O-Alkyl N,N-dialkyl (Me, Et, n-Pr or i-Pr) phosphoramidocyanidates; and O-Alkyl S-2-dialkyl (Me, Et, n-Pr or i-Pr)-aminoethyl alkyl (Me, Et, n-Pr or i-Pr) phosphonothiolates, and corresponding alkylated or protonated salts;
O-Isopropyl methylphosphonofluoridate; O-Pinacolyl methylphosphonofluoridate; O-Ethyl N,N-dimethyl phosphoramidocyanidate; or O-Ethyl S-2-diisopropylaminoethyl methyl phosphonothiolate;
a sulfur mustard, a nitrogen mustard, or a combination thereof;
carbonyl dichloride; cyanogen chloride; hydrogen cyanide; trichloronitromethane; or 3-Quinuclidinyl benzilate.

2. The system of claim 1 wherein said CWA precursor comprises: alkyl (Me, Et, n-Pr or i-Pr) phosphonyldifluorides; O-Alkyl (H or <=C10, incl. cycloalkyl) O-2-dalkyl (Me, Et, n-Pr or i-Pr)-aminoethyl alkyl (Me, Et, n-Pr or i-Pr) phosphonites and corresponding alkylated or protonated salts; O-Ethyl O-2-diisopropylaminoethyl methylphosphonite; O-Isopropyl methylphosphonochloridate; O-Pinacolyl methylphosphonochloridate; O,O-Diethyl S-[2-(diethylamino)ethyl] phosphorothiolate and corresponding alkylated or protonated salts; or 1,1,3,3,3-Pentafluoro-2-(trifluoromethyl)-1-propene.

3. The system of claim 1 wherein said CWA precursor comprises: Methylphosphonyl dichloride; Dimethyl methylphosphonate; O-Ethyl S-phenyl ethylphosphonothiolothionate; N,N-Dialkyl (Me, Et, n-Pr or i-Pr) phosphoramidic dihalides; Dialkyl (Me, Et, n-Pr or i-Pr) N,N-dialkyl (Me, Et, n-Pr or i-Pr)-phosphoramidates; N,N-Dialkyl (Me, Et, n-Pr or i-Pr) aminoethyl-2-chlorides and corresponding protonated salts; N,N-Dialkyl (Me, Et, n-Pr or i-Pr) aminoethane-2-ols and corresponding protonated salts; N,N-Dialkyl (Me, Et, n-Pr or i-Pr) aminoethane-2-thiols and corresponding protonated salts; Bis(2-hydroxyethyl)sulfide; 3,3-Dimethylbutan-2-ol; Trimethyl phosphite; Triethyl phosphite; Dimethyl phosphite; Diethyl phosphite; Sulfur monochloride; Sulfur dichloride; Thionyl chloride; Ethyldiethanolamine; Methyldiethanolamine; or Triethanolamine.

4. The system of claim 1 , wherein said internal combustion engine is selected from the group consisting of a spark initiated internal combustion engine with dedicated exhaust gas recirculation, a spark initiated internal combustion engine without dedicated exhaust gas recirculation, and a diesel engine.

5. The system of claim 1 , wherein said fuel is a fuel blend comprising at least one hydrocarbon fuel and said at least one CWA, CWA precursor, or a combination thereof.

6. The system of claim 3 , wherein said fuel blend is selected from the group consisting of:
a blend of gasoline and said at least one CWA, CWA precursor, or a combination thereof; and
a blend of diesel and said at least one CWA, CWA precursor, or a combination thereof.

7. A combustion system, comprising:
an internal combustion engine;
a fuel source for providing a fuel to the internal combustion engine, wherein said fuel comprises at least one chemical warfare agent (CWA), CWA precursor or a combination thereof;
wherein said internal combustion engine is configured to combust said fuel to produce an exhaust gas stream; and
wherein said fuel comprises from about 10% by weight to 100% by weight of said at least one CWA, CWA precursor or combination thereof.

8. A combustion system comprising:
an internal combustion engine and a fuel source wherein said internal combustion engine is configured to combust said fuel to produce an exhaust gas stream
wherein said fuel comprises a blend of diesel and at least one CWA, CWA precursor, pesticide or a combination thereof, and the system further comprises an injection system and a controller, wherein:
the injection system is configured to provide said fuel to said engine; and
said controller is configured to control operating parameters of said engine and a relative amount of diesel and said at least one CWA, CWA precursor, or a combination thereof provided in said fuel, so as to manage an efficiency with which said fuel is combusted by said engine.

9. A combustion system comprising
an internal combustion engine and a fuel source wherein said fuel comprises at least one chemical warfare agent (CWA), CWA precursor, pesticide or combination thereof wherein said internal combustion engine is configured to combust said fuel to produce an exhaust gas stream;
an injection system and a controller, wherein:
the injection system is configured to provide said fuel to said engine; and
said controller is configured to reduce cylinder wall wetting in said engine by said at least one CWA, CWA precursor, pesticide or a combination thereof in said fuel, through the control of at least one of fuel injection timing, duration, and pressure.

10. A combustion system comprising:
an internal combustion engine and a fuel source wherein said fuel comprises at least one chemical warfare agent (CWA), CWA precursor, pesticide or combination thereof wherein said internal combustion engine is configured to combust said fuel to produce an exhaust gas stream;
further comprising a secondary thermal zone coupled downstream of said engine, wherein:
in operation, said exhaust gas stream is routed through said secondary thermal zone; and
said secondary thermal zone is configured to thermally decompose at least a portion of any residual amount of said at least one CWA, CWA precursor, pesticide or combination thereof.

11. A combustion system comprising:
an internal combustion engine and a fuel source wherein said fuel comprises at least one chemical warfare agent (CWA), CWA precursor, pesticide or combination thereof wherein said internal combustion engine is configured to combust said fuel to produce an exhaust gas stream;
wherein said exhaust gas stream comprises an acid gas, and the system further comprises a scrubber to remove at least a portion of said acid gas from said exhaust gas stream.

12. The system of claim 11 , further comprising a secondary thermal zone coupled downstream of said engine, wherein:
in operation, said exhaust gas stream is routed through said secondary thermal zone;
said secondary thermal zone is configured to thermally decompose at least a portion of any residual amount of said at least one CWA, CWA precursor, pesticide or combination thereof;
said scrubber removes said acid gas from said exhaust gas stream downstream of said secondary thermal zone.

13. The system of claim 11 , wherein:
said scrubber includes at least one fluidized bed reactor (FBR), packed bed scrubber (PBS), or a combination thereof;
said FBR, said PBS, or both said FBR and said PBS utilizing a scrubbing media to remove acid gas from said exhaust gas stream; and
said scrubbing media comprises soil.

14. A combustion system comprising:
an internal combustion engine and a fuel source wherein said fuel comprises at least one chemical warfare agent (CWA), CWA precursor, pesticide or combination thereof wherein said internal combustion engine is configured to combust said fuel to produce an exhaust gas stream;
said engine is a spark initiated internal combustion engine with dedicated exhaust gas recirculation; and
said engine comprising first and second cylinder types;
the fir

Assignees

• Southwest Res Inst

Inventors

• Johnston Darrel W
• Medrano Monica R
• Moreland Daniel
• Macnaughton Michael
• Blais Matthew S
• Erwin Jimell

Classifications

• B01D53/76

  Gas phase processes, e.g. by using aerosols · CPC title

• B01D2259/4583

  for removing chemical, biological and nuclear warfare agents · CPC title

• B01D2257/2047

  Hydrofluoric acid · CPC title

• B01D53/40

  Acidic components (B01D53/44 takes precedence) · CPC title

• C10L1/1266

  nitrogen containing compounds, (e.g. NH3) · CPC title