Selective Conversion of Glycerol to Methanol over CaO-Modified HZSM-5 Zeolite |
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| Authors: | Thachapan Atchimarungsri Xinhua Gao Kangzhou Wang Qingxiang Ma Jianli Zhang Subing Fan Fugui He Jumei Tian Prasert Reubroycharoen Tiansheng Zhao |
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| Affiliation: | 1.State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, College of Chemistry & Chemical Engineering, Ningxia University, Yinchuan 750021, China;2.Department of Chemical Technology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand;3.Ningxia Academy of Metrology & Quality Inspection, National Quality Supervision and Inspection Center for Coal and Coal Chemical Products (Ningxia), Yinchuan 750200, China |
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| Abstract: | Biodiesel is generally produced from vegetable oils and methanol, which also generates glycerol as byproduct. To improve the overall economic performance of the process, the selective formation of methanol from glycerol is important in biodiesel production. In the present study, a CaO modified HZSM-5 zeolite was prepared by an impregnation method and used for the conversion of glycerol to methanol. We found that the 10%CaO/HZSM-5 with Si/Al ratio of 38 exhibited highest selectivity to methanol of 70%, with a glycerol conversion of 100% under 340 ℃ and atmospheric pressure. The characterization results showed that the introduction of a small amount of CaO into the HZSM-5 did not affect the structure of zeolite. The incorporation of HZSM-5 as an acidic catalyst and CaO as a basic catalyst in a synergistic catalysis system led to higher conversion of glycerol and selectivity of methanol. |
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| Keywords: | glycerol methanol HZSM-5 CaO |
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