©　2014,　Chemical　Publishing　Co.　All　rights　reserved.Selective　catalytic　reduction　of　nitrogen　oxides　remains　as　a　widely　used　technology　scheme　for　reducing　NOxin　the　flue　gas　from　stationary　sources.　Investigation　of　the　influence　of　composition　on　the　performance　of　selective　catalytic　reduction　flue　gas　denitrification　(DeNOx)　catalyst　has　great　significance　as　catalyst　technology　is　the　core　of　the　selective　catalytic　reduction　process.　In　this　research,　the　DeNOxactivity　and　selectivity　of　different　titania-supported　catalysts　were　tested　in　a　small-scale　experimental　system.　Titanium　dioxide,　tungsten　oxide　and　molybdenum　oxide　all　had　denitrification　effect,　but　the　activity　of　these　spices　was　low　and　activation　temperature　was　high.　The　deposition　of　sulfate　radical　led　to　an　increase　in　the　NH3adsorption　but　only　slightly　in　catalytic　activity.　Higher　vanadium　loading　increased　the　DeNOxactivity　of　titania-supported　vanadia　catalyst　and　lowered　the　activation　temperature.　However,　more　N2O　was　observed　with　the　increasing　of　vanadium　which　showed　that　the　selectivity　decreased.　Catalysts　supported　on　different　species　of　titanium　dioxide　had　certain　differences　in　DeNOxperformance.　FeSO4/TiO2was　a　good　alternative　denitration　catalyst　with　a　high　DeNOxefficiency　and　in　the　temperature　range　of　330-420°C,　the　NO　conversion　rate　reached　93.56-99.25%　under　the　topical　testing　condition　with　a　FeSO4loading　of　16　(wt.)　%.