2016
DOI: 10.1016/j.molcata.2015.10.005
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Cesium exchanged tungstophosphoric acid supported on tin oxide: An efficient solid acid catalyst for etherification of glycerol with tert-butanol to synthesize biofuel additives

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Cited by 56 publications
(23 citation statements)
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“…In order to verify the influence of the material acidity on the catalytic performance, the yield to h-GTBE vs the acidity of the catalysts was plotted (Figure 8). In general, a linear tendency is observed, indicating that acidity strongly influences the catalytic reaction, as previously observed by several authors [34][35][36]. However, an exception was observed for catalyst (2), i.e., Ti SiO 2 PrSO 3 H. The one pot Ti SiO 2 PrSO 3 H catalyst (2) exhibited strong acidity (0.9 mmol H + /g), so a high value of glycerol conversion and yield to h-GTBE was expected.…”
Section: Screening Of the Sulfonic Silica-or Titania-based Catalystssupporting
confidence: 84%
“…In order to verify the influence of the material acidity on the catalytic performance, the yield to h-GTBE vs the acidity of the catalysts was plotted (Figure 8). In general, a linear tendency is observed, indicating that acidity strongly influences the catalytic reaction, as previously observed by several authors [34][35][36]. However, an exception was observed for catalyst (2), i.e., Ti SiO 2 PrSO 3 H. The one pot Ti SiO 2 PrSO 3 H catalyst (2) exhibited strong acidity (0.9 mmol H + /g), so a high value of glycerol conversion and yield to h-GTBE was expected.…”
Section: Screening Of the Sulfonic Silica-or Titania-based Catalystssupporting
confidence: 84%
“…Celdeira et al [76] reported the sulfonation of aluminum pillary clay and niobia (HY-340 CBMM) by two different methods, a treatment with 30% aqueous sulfuric acid solution or a treatment with fuming sulfuric acid, achieving a higher sulfur incorporation with fuming sulfuric acid, attaining a yield to h-GTBE of 38.6 with 95% glycerol conversion. Srinivas et al [77] prepared cesium exchanged tungstophosphoric acid (CsTPA), supported on tin oxide with cesium exchanges between 10% and 30%. The acidity of the solids increased up to 20% of cesium exchange, being the solid with the highest acidity and also exhibiting the best catalytic performance (X G = 91% and S h-GTBE = 44%) after only one hour of reaction time.…”
Section: Etherification Of Glycerol With Tert-butyl Alcoholmentioning
confidence: 99%
“…The pure and M-SBA-15 materials (where M = Al, Zr, Ti and Nb; Si/M ratio = 20) were synthesized according to a previously reported procedure [22][23][24]. The zirconium (IV) n-propoxide solution (70 wt% in 1-propanol, Aldrich), tetraisopropyl o-titanate (TiPOT, > 98%, Merc), niobium (V) chloride (99%, Sigma-Aldrich) and aluminum isopropoxide (Sigma-Aldrich) were used as precursors for preparing the M-SBA-15 materials, where M = Zr, Ti, Nb and Al respectively.…”
Section: Preparation Of Pure and Metal-incorporated Sba-15mentioning
confidence: 99%