Pt-promoted and H[beta] zeolite-supported Ni sub(2)P catalysts for hydroisomerisation of n-heptane

Ni sub(2)P/H[beta] was hydrothermally prepared and then a trace amount of Pt was loaded on to Ni sub(2)P/H[beta] using an aqueous solution of chloroplatinic acid as the precursor of Pt. The samples were characterised by XRD, BET, C elemental analysis, TGA and NH sub(3)-TPD, and evaluated as bifunctional catalysts for hydroisomerisation of n-heptane in an atmospheric fixed-bed flow reactor. Catalytic behaviour is discussed in relation to catalyst physicochemical properties. Results show that Ni sub(2)P is beneficial to the selective production of isomerisation products. A slight of Pt accompanying with Ni sub(2)P promotes greatly the selectivity, conversion and stability. 0.1%Pt30%Ni sub(2)P/H[beta] offers the highest selectivity to isomerisation of 91.5% with considerably high conversion of n-heptane of 55.9%. Investigation on reaction conditions reveals the suitable weight hourly space velocity of 0.4 h super(-1), H sub(2)/n-heptane (mol/mol) of 7.9 and reaction temperature of 593 K.