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Octane Interactions of Hydrocarbons
(Unpublished Data)

Studies:

  1. Interactions between 13 major hydrocarbons - 112+ unleaded octanes.
     

  2. Interactions of 27 hydrocarbons with isooctane, cyclohexane, and diisobutylene - 162+ unleaded octanes.
     

  3. Interactions of pure aromatic mixtures with gasoline components - 24+ unleaded octanes.
     

  4. Interactions of Toluene/Xylene mixture with 60,80, and 100 reference fuel and with 60 reference plus napthenes - 16+ unleaded octanes.
     

  5. Interactions between hydrocarbon types - 28+ unleaded octanes.
     

  6. Interactions of toluene and M-xylene with naphthene  and olefin mixtures - 16+ unleaded octanes.
     

  7. Interactions between individual aromatics - 42+ unleaded octanes

Study 1 - 13 Major Hydrocarbons

AROMATICS

TOLUENE
ETHYL BENZENE
P-XYLENE
M-XYLENE
O-XYLENE
1,2,4-TRIMETHYL BENZENE

With

 NON - AROMATICS  (42 BLENDS)

N-HEPTANE    
ISOHEXANES
ISO PENTANE
ISO OCTANE

2-METHYL-2-BUTENE
METHYL CYCLOPENTANE
METHYL CYCLOHEXANE
     
PARAFFINS

N-HEPTANE
ISOHEXANES
ISOPENTANE
ISOOCTANE

With

 OTHERS  (12 BLENDS)

2-METHYL-2-BUTENE   
METHYL CYLOPENTANE
METHYL CYCLOHEXANE
     
OLEFIN

2-METHYL-2-BUTENE

With

 NAPHTHENES  (2-BLENDS)

METHYLCYCLOPENTANE   
METHYLCYCLOHEXANE

INTERACTION COEFFICIENT RANGE:

-15 to +93 RESEARCH
-38 to +88 MOTOR

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Study 2 - 26 Hydrocarbons with Isooctane, Cyclohexane, and Diisobutylene

N-HEPTANE
N-HEXANE
N-PENTANE
2, 2-DIMETHYL BUTANE
2, 3-DIMETHYL BUTANE
2-METHYL PENTANE
3-METHYL PENTANE
2,3-DIMETHYL PENTANE
2, 4-DIMETHYL PENTANE
2,2,3-TRIMETHYL BUTANE
2,2,4-TRIMETHYL PENTANE
2,2,5-TRIMETHYL HEXANE

CYCLOPENTANE
METHYL CYCLOPENTANE
CYCLOHEXANE
METHYL CYCLOHEXANE
CYCLOHEXANE

1-PENTENE
2-PENTENE
2-METHYL-1-BUTENE
2-METHYL-2-BUTENE
DIISOBUTYLENE
1-DECENE

BENZENE
SEC-BUTYL BENZENE
TERT-BUTYL BENZENE

INTERACTION COEFFICIENT RANGE:

-21 to +111 RESEARCH
-38 to +95 MOTOR

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Study 3  -  C9 Aromatic Mixture and C10 Aromatic Mixture with Gasoline Components

ALKYLATE (93.5 RESEARCH)
CAT CRACKED (87.6 RESEARCH)
REFORMATE (91.3 RESEARCH)
HYDROCRACKED (85.9 RESEARCH)
LIGHT STRAIGHT RUN (67.1 RESEARCH)

INTERACTION COEFFICIENT RANGE:

+3 to +24 RESEARCH
 -8 to +10 MOTOR 

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Study 4 - Toluene / Xylene Mix with Reference Fuels and a "Synthetic LSTR"

    MIX * WITH:
      60    OCTANE REFERENCE FUEL
* MIX     80    OCTANE REFERENCE FUEL
42% TOLUENE   100    OCTANE REFERENCE FUEL
  8% ETHYLBENZENE   SYNTHETIC LIGHT STRAIGHT RUN
  8% P-XYLENE   80% 60 OCTANE REFERENCE
29% M-XYLENE   10% METHYL CYCLOPENTANE
13% O-XYLENE   10% METHYL CYCLOHEXANE

 INTERACTION COEFFICIENT RANGE:

 +2  to  +22 RESEARCH
-17 to   +7   MOTOR

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Study 5 - Interactions Between Hydrocarbon Types + 2 Multi - Component Blends

COMPOSITIONS, VOLUME %

TOLUENE

C9 AROM

C10AROM

ISO-OCTANE

60 PRF

 2-METHYL-
 2-BUTENE

 METHYL CYCLO-PENTANE
100
100
50 50
50 50
50 50
50 50
50 50
50 50
50 50
25 25 50
90 10
50 50
50 50
25 50 15 10

INTERACTION COEFFICIENT RANGE:

  -8 to +92 RESEARCH
-19 to +72 MOTOR

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Study 6 - Toluene and M-Xylene with Naphthene Mixture and Olefin Mixture

TOLUENE            +    M-XYLENE
NAPHTHENES    +    OLEFINS
TOLUENE            +    OLEFINS
M-XYLENE          +    OLEFINS
TOLUENE            +    NAPHTHENES
M-XYLENE          +    NAPHTHENES

NAPHTHENE MIXTURE

40%    METHYL CYCLOPENTANE
20%    CYCLOHEXANE
40%    METHYL CYCLOHEXANE

OLEFIN MIXTURE

20%    2-METHYL-1-BUTENE
20%    2-PENTENE
40%    2-METHYL-2-BUTENE
20%    2-HEXENE

INTERACTION COEFFICIENT RANGE:

-23 to +  4 RESEARCH
   -8 to -50 MOTOR

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Study 7 - Between Aromatics All 2-Way Combinations

TOLUENE

ETHYLBENZENE

P-XYLENE

M-XYLENE

O-XYLENE

C9 AROMATICS

C10 AROMATICS

INTERACTION COEFFICIENT RANGE:

-16 to +12 RESEARCH
-23 to +10 MOTOR

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