diff --git a/src/thermophysicalModels/chemistryModel/chemistryModel/rhoChemistryModel/rhoChemistryModels.C b/src/thermophysicalModels/chemistryModel/chemistryModel/rhoChemistryModel/rhoChemistryModels.C
index c331cd1c7..b45ebb318 100644
--- a/src/thermophysicalModels/chemistryModel/chemistryModel/rhoChemistryModel/rhoChemistryModels.C
+++ b/src/thermophysicalModels/chemistryModel/chemistryModel/rhoChemistryModel/rhoChemistryModels.C
@@ -111,6 +111,23 @@ namespace Foam
         rhoChemistryModel,
         icoPoly8EThermoPhysics
     );
+
+    // Chemistry moldels based on absoluteEnthalpy
+    makeChemistryModel
+    (
+        chemistryModel,
+        rhoChemistryModel,
+        gasHaThermoPhysics
+    );
+
+    // Chemistry moldels based on absoluteInternalEnergy
+    makeChemistryModel
+    (
+        chemistryModel,
+        rhoChemistryModel,
+        gasEaThermoPhysics
+    );
+
 }
 
 // ************************************************************************* //
diff --git a/src/thermophysicalModels/chemistryModel/chemistrySolver/chemistrySolver/makeChemistrySolvers.C b/src/thermophysicalModels/chemistryModel/chemistrySolver/chemistrySolver/makeChemistrySolvers.C
index 069a78282..27e28224d 100644
--- a/src/thermophysicalModels/chemistryModel/chemistrySolver/chemistrySolver/makeChemistrySolvers.C
+++ b/src/thermophysicalModels/chemistryModel/chemistrySolver/chemistrySolver/makeChemistrySolvers.C
@@ -88,6 +88,12 @@ namespace Foam
         incompressibleGasEThermoPhysics
     );
     makeChemistrySolverTypes(rhoChemistryModel, icoPoly8EThermoPhysics);
+
+    // Chemistry solvers based on absoluteEnthalpy
+    makeChemistrySolverTypes(rhoChemistryModel, gasHaThermoPhysics);
+
+    // Chemistry solvers based on absoluteInternalEnergy
+    makeChemistrySolverTypes(rhoChemistryModel, gasEaThermoPhysics);
 }
 
 
diff --git a/src/thermophysicalModels/reactionThermo/chemistryReaders/chemistryReader/makeChemistryReaders.C b/src/thermophysicalModels/reactionThermo/chemistryReaders/chemistryReader/makeChemistryReaders.C
index fd48f1269..4c302b3d1 100644
--- a/src/thermophysicalModels/reactionThermo/chemistryReaders/chemistryReader/makeChemistryReaders.C
+++ b/src/thermophysicalModels/reactionThermo/chemistryReaders/chemistryReader/makeChemistryReaders.C
@@ -86,6 +86,19 @@ makeChemistryReaderType(foamChemistryReader, hConstSolidThermoPhysics);
 makeChemistryReaderType(foamChemistryReader, hPowerSolidThermoPhysics);
 makeChemistryReaderType(foamChemistryReader, hExpKappaConstSolidThermoPhysics);
 
+
+// Gas chemistry readers based on absoluteEnthalpy
+
+makeChemistryReader(gasHaThermoPhysics);
+makeChemistryReaderType(foamChemistryReader, gasHaThermoPhysics);
+
+
+// Gas chemistry readers based on absoluteInternalEnergy
+
+makeChemistryReader(gasEaThermoPhysics);
+makeChemistryReaderType(foamChemistryReader, gasEaThermoPhysics);
+
+
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
 } // End namespace Foam
diff --git a/src/thermophysicalModels/reactionThermo/rhoReactionThermo/rhoReactionThermos.C b/src/thermophysicalModels/reactionThermo/rhoReactionThermo/rhoReactionThermos.C
index 27bc73d75..4cc46f227 100644
--- a/src/thermophysicalModels/reactionThermo/rhoReactionThermo/rhoReactionThermos.C
+++ b/src/thermophysicalModels/reactionThermo/rhoReactionThermo/rhoReactionThermos.C
@@ -212,6 +212,47 @@ makeReactionThermo
     specie
 );
 
+//reactionthermo using absoluteEnthalpy
+
+makeReactionThermo
+(
+    rhoThermo,
+    rhoReactionThermo,
+    heRhoThermo,
+    homogeneousMixture,
+    sutherlandTransport,
+    absoluteEnthalpy,
+    janafThermo,
+    perfectGas,
+    specie
+);
+
+makeReactionThermo
+(
+    rhoThermo,
+    rhoReactionThermo,
+    heRhoThermo,
+    inhomogeneousMixture,
+    sutherlandTransport,
+    absoluteEnthalpy,
+    janafThermo,
+    perfectGas,
+    specie
+);
+
+makeReactionThermo
+(
+    rhoThermo,
+    rhoReactionThermo,
+    heRhoThermo,
+    veryInhomogeneousMixture,
+    sutherlandTransport,
+    absoluteEnthalpy,
+    janafThermo,
+    perfectGas,
+    specie
+);
+
 
 // Multi-component thermo for internal energy
 
@@ -260,6 +301,29 @@ makeReactionMixtureThermo
     icoPoly8EThermoPhysics
 );
 
+// Multi-component thermo for absolute enthalpy
+
+makeReactionMixtureThermo
+(
+    rhoThermo,
+    rhoReactionThermo,
+    heRhoThermo,
+    multiComponentMixture,
+    gasHaThermoPhysics
+);
+
+
+// Multi-component thermo for internal energy
+
+makeReactionMixtureThermo
+(
+    rhoThermo,
+    rhoReactionThermo,
+    heRhoThermo,
+    multiComponentMixture,
+    gasEaThermoPhysics
+);
+
 
     // Multi-component reaction thermo
 
@@ -424,6 +488,47 @@ makeReactionMixtureThermo
     gasHThermoPhysics
 );
 
+// Multi-component reaction thermo for absolute enthalpy
+
+makeReactionMixtureThermo
+(
+    rhoThermo,
+    rhoReactionThermo,
+    heRhoThermo,
+    reactingMixture,
+    gasHaThermoPhysics
+);
+
+makeReactionMixtureThermo
+(
+    rhoThermo,
+    rhoReactionThermo,
+    heRhoThermo,
+    singleStepReactingMixture,
+    gasHaThermoPhysics
+);
+
+
+// Multi-component reaction thermo for internal energy
+
+makeReactionMixtureThermo
+(
+    rhoThermo,
+    rhoReactionThermo,
+    heRhoThermo,
+    reactingMixture,
+    gasEaThermoPhysics
+);
+
+makeReactionMixtureThermo
+(
+    rhoThermo,
+    rhoReactionThermo,
+    heRhoThermo,
+    singleStepReactingMixture,
+    gasEaThermoPhysics
+);
+
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
diff --git a/src/thermophysicalModels/specie/include/reactionTypes.H b/src/thermophysicalModels/specie/include/reactionTypes.H
index b58c3098b..91a9f0961 100644
--- a/src/thermophysicalModels/specie/include/reactionTypes.H
+++ b/src/thermophysicalModels/specie/include/reactionTypes.H
@@ -68,6 +68,12 @@ namespace Foam
         incompressibleGasEReaction;
 
     typedef Reaction<icoPoly8EThermoPhysics> icoPoly8EReaction;
+
+    // absolute enthalpy based reactions
+    typedef Reaction<gasHaThermoPhysics> gasHaReaction;
+
+    // absolute internal energy based reactions
+    typedef Reaction<gasEaThermoPhysics> gasEaReaction;
 }
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
diff --git a/src/thermophysicalModels/specie/include/thermoPhysicsTypes.H b/src/thermophysicalModels/specie/include/thermoPhysicsTypes.H
index 04cecc04c..a05e2e234 100644
--- a/src/thermophysicalModels/specie/include/thermoPhysicsTypes.H
+++ b/src/thermophysicalModels/specie/include/thermoPhysicsTypes.H
@@ -40,6 +40,8 @@ Description
 
 #include "sensibleEnthalpy.H"
 #include "sensibleInternalEnergy.H"
+#include "absoluteEnthalpy.H"
+#include "absoluteInternalEnergy.H"
 #include "thermo.H"
 #include "sutherlandTransport.H"
 #include "constTransport.H"
@@ -188,6 +190,40 @@ namespace Foam
         >,
         8
     > icoPoly8EThermoPhysics;
+
+
+    // thermo physics types based on absoluteEnthalpy
+
+    typedef
+    sutherlandTransport
+    <
+        species::thermo
+        <
+            janafThermo
+            <
+                perfectGas<specie>
+            >,
+            absoluteEnthalpy
+        >
+    > gasHaThermoPhysics;
+
+
+    // thermo physics types based on absoluteInternalEnergy
+
+    typedef
+    sutherlandTransport
+    <
+        species::thermo
+        <
+            janafThermo
+            <
+                perfectGas<specie>
+            >,
+            absoluteInternalEnergy
+        >
+    > gasEaThermoPhysics;
+
+
 }
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
diff --git a/src/thermophysicalModels/specie/reaction/reactions/makeReactions.C b/src/thermophysicalModels/specie/reaction/reactions/makeReactions.C
index 96352b2c9..608de1b0b 100644
--- a/src/thermophysicalModels/specie/reaction/reactions/makeReactions.C
+++ b/src/thermophysicalModels/specie/reaction/reactions/makeReactions.C
@@ -103,6 +103,10 @@ namespace Foam
     )
     makeReactions(incompressibleGasEThermoPhysics, incompressibleGasEReaction)
     makeReactions(icoPoly8EThermoPhysics, icoPoly8EReaction)
+
+    // absolute enthalpy based reactions
+    makeReactions(gasHaThermoPhysics, gasHaReaction)
+    makeReactions(gasEaThermoPhysics, gasEaReaction)
 }
 
 // ************************************************************************* //