Superficial Pd nanoparticles supported on carbonaceous SBA-15 as efficient hydrotreating catalyst for upgrading biodiesel fuel

Effect of Pd Precursor Salts on the Chemical State, Particle Size, and Performance of Activated Carbon-Supported Pd Catalysts for the Selective Hydrogenation of Palm Biodiesel

“…The major mono-FAME components of palm-BDF were cis -methyl oleate ( cis -C 18:1 ; 36 wt.%) and trans -methyl oleate ( trans -C 18:1 ; 0.2 wt.%), and the major sat-FAME components of palm-BDF were methyl palmitate (C 16:0 ; 45.5 wt.%) and methyl stearate (C 18:0 ; 4.8 wt.%). The FAME composition of palm-BDF was similar to that reported in the literature [ 54 ]. The relative autoxidation rates of C 18:1 , C 18:2 , and C 18:3 were reported to be 1, 41, and 98, respectively [ 55 ].…”

“…As a result, the large initial rate, TOF and S value of 1%Pd/AC (nit) catalyst with large Pd particles (approximately 8 nm) presented the high hydrotreating performance in the synthesis of H-FAME. The catalytic performance of the 1%Pd/AC (nit) catalyst was comparable to that of the recently reported Pd/SBA-15 catalyst, which presented high k 1 and low k 2 values for the synthesis of H-FAME owing to the Pd nanoparticles being impregnated on the surface of C-coated SBA-15 [ 54 ]. Because SBA-15 presented low acid capacity and hydrophobic surface, its affinity toward the methylene bonds of the poly-FAME components was high.…”

Discovery of a Neutral 40-PdII-Oxo Molecular Disk, [Pd40O24(OH)16{(CH3)2AsO2}16]: Synthesis, Structural Characterization, and Catalytic Studies

“…26 In addition, the Pd particle sizes in the commercial Pd/C were found to be in the order of ∼12 nm. 26 A point to note is that no arsenic was detected in any of the materials by TEM-EDS, which is consistent with the elemental analysis results. The TEM-tomography analysis on the catalyst after catalysis indicates that the Pd nanoparticles are located inside the SBA15 structure (Figure S21, see the videos in the SI).…”

“…The TEM analysis of Pd 40 -SiW 12 @SBA15-apts after calcination and catalysis indicates that the SBA15 is loaded with Pd nanoparticles that have diameters in the range of ∼2–6 nm, thus showing only marginal aggregation (Figures S20b). Pd nanoparticles supported on SBA15 via the incipient wet-impregnation method of mononuclear Pd 2+ salts have been used as hydrotreating catalysts for the upgradation of biodiesel fuels, wherein the Pd nanoparticles on the SBA-15 support were found to be in the order of 6–10 nm . In addition, the Pd particle sizes in the commercial Pd/C were found to be in the order of ∼12 nm .…”

“…Pd nanoparticles supported on SBA15 via the incipient wet-impregnation method of mononuclear Pd II salts have been used as hydrotreating catalysts for the upgradation of biodiesel fuels, wherein the Pd nanoparticles on the SBA-15 support were found to be in the order of 6 -10 nm. 26 In addition, the Pd particle sizes in the commercial Pd/C were found to be in the order of ~12 nm. 26 A point to note is that no arsenic was detected in any of the materials by TEM-EDS, which is consistent with the elemental analysis results.…”