Abstract

Ni2P/Hβ was hydrothermally prepared and then a trace amount of Pt was loaded on to Ni2P/Hβ using an aqueous solution of chloroplatinic acid as the precursor of Pt. The samples were characterised by XRD, BET, C elemental analysis, TGA and NH3-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 Ni2P is beneficial to the selective production of isomerisation products. A slight of Pt accompanying with Ni2P promotes greatly the selectivity, conversion and stability. 0.1%Pt30%Ni2P/Hβ 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 0.4h−1, H2/n-heptane (mol/mol) of 7.9 and reaction temperature of 593K.

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