A method for testing one or more test components including providing a
non-engine based test system including a combustor in fluid communication
with the one or more test components; supplying air and fuel to the
combustor at an air to fuel ratio (AFR) and under feed conditions
effective to produce a feedstream flowpath, wherein the fuel includes one
or more alternative fuel which is gaseous at ambient conditions including
atmospheric pressure and a temperature of about 20.degree. C. or higher,
the supplying air and fuel including feeding the one or more alternative
fuel to a pressure regulator to produce one or more pressure regulated
alternative fuel and feeding the one or more pressure regulated
alternative fuel to the combustor; combusting at least a portion of fuel
in the feedstream flowpath under combustion conditions effective to
produce an exhaust product including one or more alternative fuel
exhaust; and, exposing the one or more test components to the exhaust
product under test conditions effective to produce one or more treated
components.