Where-ever you have got "Fluid Flow /  Heat Transfer / Mass Transfer " , CFD can be applied. All chemical engineering applications involving either of the above or all combined CFD can be used. e.g. applications involving Combustion, Surface Chemistry, Evaporation ,Cavitation,Multiphase flow etc.

In fact, it has very wide applications. I suggest you to see the COMSOL Multiphysics® videos and documentations in the "Chemical Reaction Engineering Module", COMSOL is very advanced and interesting media for CFD generation in all trends of interests. Also there are many publications about this subject(see Google scholar link please). 

http://www.comsol.com/chemical-reaction-engineering-module#specs

http://www.comsol.com/chemical-reaction-engineering-module#videos

http://scholar.google.de/scholar?q=+review+on+CFD+in+chemical+engineering&hl=en&as_sdt=0,5

As Swapnil explained, wherever you are involved with either of momentum, mass and energy transfers phenomena. I think giving topics works well for you (applications are really broad):

- multiphase flows including liquid-solid, gas-solid, gas-liquid and gas-liquid-solid flows like fluidized beds, bubble columns, conveying, sedimentation, size classification, slurry flows and etc. 

- mass transfer/heat transfer phenomena in reacting and non-reacting single phase and multi-phase flows like, combustion and gasification, drying, polymerization fluid bed reactors, mixing, single phase reactors, filtration, coating and granulation, reservoir simulation, evaporation and condensation and etc.    

CFD has great many application in chemical engineering whereever any fluid flow is involved. Since most of chemical processes and unit operations involve flow of either one or multiple phases, one can use CFD to evaluate the impact of flow on reaction and vice verssa. Although CFD is based on solving conservation equations of mass, momentum and enery for each phase, the approximation comes thru turbulence modelling , reaction kinetic modelling and also transport closures thru different phases. In fact these are main areas of reasearch in making CFD more versatile and accurate in depicting the actual flow field in plant scale. To summarize, we have very sccesfully applied CFD in various flow raelated troubleshooting problem in refinery equipment and reactor. We have also modified the design of equipment to address the flow related issues. Today RIL refineries use the CFD as a very advance tool to have insight of the flow issues inside the reactors and process equipment Another area of research in CFD is multiphase flow simulation and particularly solving flow and reaction kinetics simultaneous using so called density based algorithm, may like to see my related publications in this area on SO2-NOx process

Very correct indeed. From macroscopic problem like heat, mass, momentum transfer coupled with reactions in chemical process industry to micro-scale level applications, CFD is used ubiquitously to treat variety of problems. Also, simulation of solid liquid gas suspension using DEM-CFD and LBM methods and solid structure and fluid interaction (FSI) are few emerging areas of CFD field.

Further on the subject on recent advances in cfd modeling are applications of cfd in simulating

Different regimes of fluidized bed. In spite of vast amount of research done in 30 yrs