Preparation of Sulfated Zirconia-Modified Mesoporous SBA-15 and Catalytic Performance in Synthesis of Methyl Palmitate

Zhi Ming Tian; Qi Gang Deng; Le Yuan Li

doi:10.4028/www.scientific.net/AMR.233-235.1714

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 233-235Preparation of Sulfated Zirconia-Modified...

Preparation of Sulfated Zirconia-Modified Mesoporous SBA-15 and Catalytic Performance in Synthesis of Methyl Palmitate

Abstract:

Sulfated zirconia-modified mesoporous SBA-15 molecular sieves(ZS/SBA-15) had been prepared by homogeneous urea hydrolysis method. The modified materials were characterized by X-ray diffraction (XRD), transmission electron micrographs (TEM), nitrogen adsorption. XRD results exhibit that ZS/SBA-15 remains the highly order mesoporous channels with hexagonal structure. The average diameter of the pore decreases from 5.60 to 4.70 nm after addition of ZrO₂ and SO₄^2- to SBA-15.The acid strength(0.80<H₀<0.99)on catalyst surface was determined by mean of Hammett indication method, and the total amount of acid (1.42 mmol·g^-1) was estimated by TPD of NH₃. The catalyst (ZS/SBA-15) show best catalytic activity in synthesis of methyl palmitate.The optimum conditions of the esterification by orthogonal experiments were studied: the molar of methanol to palmitic acid 15: 1,the amount of catalyst 0.8 g, reaction time 8h .The conversion of methyl palmitate could reach 90.3% under the optimum conditions.

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Advanced Materials Research (Volumes 233-235)

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1714-1717

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.233-235.1714

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May 2011

Authors:

Zhi Ming Tian, Qi Gang Deng, Le Yuan Li

Keywords:

Catalyse, Methyl Palmitate, SBA-15, ZrO₂/SO₄^2-SBA-15

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