  It is known that certain quantum cosmological models present quantum behavior
for large scale factors. Since quantization can suppress past singularities, it
is natural to inquire whether quantum effects can prevent future singularities.
To this end, a Friedmann-Robertson-Walker quantum cosmological model dominated
by a phantom energy fluid is investigated. The classical model displays
accelerated expansion ending in a Big Rip. The quantization is performed in
three different ways, which turn out to lead to the same result, namely there
is a possibility that quantum gravitational effects could not remove the Big
Rip.
