Custom properties
==================
Customized properties (coming soon).

.. toctree::
    Custom physical property packages <custom_physical_property_packages_doc>
    Custom reaction proprty packages <custom_reaction_property_packages_doc>

.. Currently the air separation case study and HC processing example fail
..    Property packages for air separation units <air_separation_case_study_doc>
..    Property package for hydrocarbon Gibbs reactor unit <hydrocarbon_processing_example_doc>