K2CO3-loaded hydrotalcite: A promising heterogeneous solid base catalyst for biolubricant base oil production from waste cooking oils
K2CO3-loaded hydrotalcite: A promising heterogeneous solid base catalyst for biolubricant base oil production from waste cooking oils
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DOI：
10.1016/j.apcatb.2017.02.078
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发表时间：
2017-07
影响因子：
22.1
通讯作者：
Guo-Wei Sun;Ying Li;Zi-zhe Cai;Y. Teng;Yong Wang;M. Reaney
中科院分区：
文献类型：
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作者：
Guo-Wei Sun;Ying Li;Zi-zhe Cai;Y. Teng;Yong Wang;M. Reaney
摘要负载碳酸钾（K2CO3）的水滑石（HT）最初是一种很有前途的非均相固体碱催化剂，用于以废食用油和三甲基丙烷（TMP）为原料，通过脂肪酸甲酯（FAME）酯交换制三甲基丙烷脂肪酸三酯（TFATE）作为生物润滑基础油，其中FAME / TMP比为3:1，催化剂用量为2% w/w，压力为300 Pa，优化了反应温度（160℃）和反应时间（2 h）， TFATE收率最高（80.6%）。在此基础上，优化了制备HT/ k2co3催化剂时k2co3用量（30% w/w）和煅烧温度（500℃），TFATE收率达到93.9%,FAME （CRF）转化率达到97.7%。对催化剂的回收进行了研究，确定了合适的再活化方法。此外，还对不同状态的HT/ k2co3催化剂进行了表征，以便更好地了解其作用机理和合适的应用前景。
Hydrotalcite (HT) loaded with potassium carbonate (K2CO3) was originally applied as a promising heterogeneous solid base catalyst for the production of trimethylolpropane fatty acid triester (TFATE) as the biolubricant base oil through transesterification of fatty acid methyl esters (FAME) from waste cooking oils and trimethylolpropane (TMP), in which FAME to TMP ratio (3:1), catalyst dosage (2% w/w), pressure (300 Pa), temperature (160 °C) and time (2 h) were optimized in order to obtain the best TFATE yield (80.6%). Based on the above, K2CO3dosage (30% w/w) and calcination temperature (500 °C) in the preparation of HT/K2CO3catalyst were optimized to improve the TFATE yield to 93.9% along with 97.7% of conversion rate of FAME (CRF). The catalyst recycling was also investigated to determine the suitable reactivated method. Besides, HT/K2CO3catalysts in various states were characterized for better comprehension of their functional mechanisms and appropriate potential applications.