Heveling, JNicolaides, CPScurrell, MS2007-03-262007-06-072007-03-262007-06-071998-10-11Heveling, J, Nicolaides, CP and Scurrell, MS. 1998. Catalysts and conditions for the highly efficient, selective and stable heterogeneous oligomerisation of ethylene. Applied Catalysis A-General, vol. 173(1), pp 1-90926-860xhttp://hdl.handle.net/10204/2020http://hdl.handle.net/10204/2020The oligomerisation of ethylene into products in the C-4-C-20 range over heterogeneous nickel catalysts in a fixed-bed reactor at low temperature and high pressure (LT-HP) is reported. The catalysts were obtained by Ni (II) exchange or impregnation of two differently prepared amorphous and mesoporous silica-alumina supports. A plot of catalytic activity versus temperature at 35 bar and MHSV=2 produces a volcano-type curve with a maximum around 120 degrees C. Experiments performed under the LT-HP reaction conditions, viz. 120 degrees C, 35 bar and MHSV=2, give an ethylene conversion level of 99% and a 97% selectivity to products with an even number of carbon atoms. The product spectrum (C-n distribution) was dependent on the type of catalyst used, with the percentage of the C10+ oligomers lying in the range 23-41% by mass. Of practical significance, these types of catalyst were found to be extremely stable in use showing no detectable drop in conversion after 108 days on stream under the LT-HP reaction conditions employed.201567 bytesapplication/pdfenCopyright: 1998 Elsevier Science B.VEthyleneOligomerisationHeterogeneous nickel catalystsArticleHeveling, J., Nicolaides, C., & Scurrell, M. (1998). Catalysts and conditions for the highly efficient, selective and stable heterogeneous oligomerisation of ethylene. http://hdl.handle.net/10204/2020Heveling, J, CP Nicolaides, and MS Scurrell "Catalysts and conditions for the highly efficient, selective and stable heterogeneous oligomerisation of ethylene." (1998) http://hdl.handle.net/10204/2020Heveling J, Nicolaides C, Scurrell M. Catalysts and conditions for the highly efficient, selective and stable heterogeneous oligomerisation of ethylene. 1998; http://hdl.handle.net/10204/2020.TY - Article AU - Heveling, J AU - Nicolaides, CP AU - Scurrell, MS AB - The oligomerisation of ethylene into products in the C-4-C-20 range over heterogeneous nickel catalysts in a fixed-bed reactor at low temperature and high pressure (LT-HP) is reported. The catalysts were obtained by Ni (II) exchange or impregnation of two differently prepared amorphous and mesoporous silica-alumina supports. A plot of catalytic activity versus temperature at 35 bar and MHSV=2 produces a volcano-type curve with a maximum around 120 degrees C. Experiments performed under the LT-HP reaction conditions, viz. 120 degrees C, 35 bar and MHSV=2, give an ethylene conversion level of 99% and a 97% selectivity to products with an even number of carbon atoms. The product spectrum (C-n distribution) was dependent on the type of catalyst used, with the percentage of the C10+ oligomers lying in the range 23-41% by mass. Of practical significance, these types of catalyst were found to be extremely stable in use showing no detectable drop in conversion after 108 days on stream under the LT-HP reaction conditions employed. DA - 1998-10-11 DB - ResearchSpace DP - CSIR KW - Ethylene KW - Oligomerisation KW - Heterogeneous nickel catalysts LK - https://researchspace.csir.co.za PY - 1998 SM - 0926-860x T1 - Catalysts and conditions for the highly efficient, selective and stable heterogeneous oligomerisation of ethylene TI - Catalysts and conditions for the highly efficient, selective and stable heterogeneous oligomerisation of ethylene UR - http://hdl.handle.net/10204/2020 ER -