@article{scholars3456, year = {2013}, doi = {10.1186/1752-153X-7-149}, number = {1}, note = {cited By 20}, volume = {7}, journal = {Chemistry Central Journal}, title = {Methyl oleate deoxygenation for production of diesel fuel aliphatic hydrocarbons over Pd/SBA-15 catalysts}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84883449696&doi=10.1186\%2f1752-153X-7-149&partnerID=40&md5=1df7528660e2922b1e6aff372f1c15be}, abstract = {Background: Catalytic deoxygenation is a prominent process for production of renewable fuels from vegetable oil. In this work, deoxygenation of technical grade methyl oleate to diesel fuel aliphatic hydrocarbons (C15 - C18) is evaluated with several parameters including temperature, hydrogen pressure and reaction time in a stirred batch reactor over Pd/SBA-15 catalysts. Results: Two different SBA-15 morphologies i.e. spherelike and necklacelike structures have been synthesize as supports for Pd active metal. It is found that Pd dispersion on necklacelike SBA-15 is higher than that of spherelike SBA-15. Notably, higher Pd dispersion on necklacelike SBA-15 provides significant deoxygenation efficiency as compared to Pd/SBA-15-spherelike. Results show that H2 pressures greatly determine the total ester conversion and selectivity to C15 - C18 aliphatic hydrocarbons. Total ester conversions with 55\< selectivity to n-heptadecane are achieved using Pd/SBA-15-necklacelike at 270{\^A}oC and 60{\^A} bar{\^A} H2 pressure within 6{\^A} h reaction time. Gas phase study reveals that formation of C17 is generated via indirect decarbonylation when the reaction time is prolonged. Conclusions: Pd/SBA-15-necklacelike catalyst exhibits good catalytic performance with high selectivity to diesellike aliphatic hydrocarbons (C15 - C18). The physicochemical properties of the Pd supported on different SBA-15 morphologies influence the deoxygenation activity of the catalysts. Furthermore, the reaction pathways are governed by the H2 pressure as well as reaction duration. {\^A}{\copyright} 2013 Lee and Ramli; licensee Chemistry Central Ltd.}, author = {Lee, S.-P. and Ramli, A.}, issn = {1752153X} }