Oxidation of Glycerol to Lactic Dcid over Metal Supported Catalysts
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Abstract
Selective oxidation of glycerol, a by-product from the biodiesel industry, on metal (Pt, Cu and Fe) deposited on supports (Titanium nanotube, Titanium dioxide (P25), HZSM-5, and HY) is an important reaction in the production of lactic acid. The influence of the metal-supported catalysts on the glycerol conversion and lactic acid selectivity was investigated, and it demonstrated reduced Pt-supported titanium nanotube (red-Pt/TNT) exhibited the best performance. A base type (LiOH, NaOH and KOH) and a base amount significantly affected the catalytic performance. Under optimum conditions, 19.62% glycerol conversion and 94.85% selectivity for lactic acid were obtained over red-Pt/TNT when reacting 25 mL of glycerol solution (10 wt. %), using 0.125 g catalyst in the presence of LiOH (0.75 g) at 90 oC under a flow of oxygen for 4 h. Moreover, the reuse and regeneration of red-Pt/TNT were investigated and a reaction mechanism for the conversion of glycerol was proposed.
Article Details
บทความที่ได้รับการตีพิมพ์เป็นลิขสิทธิ์ของ วารสารวิทยาศาสตร์และเทคโนโลยี มหาวิทยาลัยอุบลราชธานี
ข้อความที่ปรากฏในบทความแต่ละเรื่องในวารสารวิชาการเล่มนี้เป็นความคิดเห็นส่วนตัวของผู้เขียนแต่ละท่านไม่เกี่ยวข้องกับมหาวิทยาลัยอุบลราชธานี และคณาจารย์ท่านอื่นๆในมหาวิทยาลัยฯ แต่อย่างใด ความรับผิดชอบองค์ประกอบทั้งหมดของบทความแต่ละเรื่องเป็นของผู้เขียนแต่ละท่าน หากมีความผิดพลาดใดๆ ผู้เขียนแต่ละท่านจะรับผิดชอบบทความของตนเองแต่ผู้เดียว
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