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首页> 美国卫生研究院文献>Materials >Mesoporous Acidic Catalysts Synthesis from Dual-Stage and Rising Co-Current Gasification Char: Application for FAME Production from Waste Cooking Oil
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Mesoporous Acidic Catalysts Synthesis from Dual-Stage and Rising Co-Current Gasification Char: Application for FAME Production from Waste Cooking Oil

机译：双级和并流气化焦炭合成中孔酸性催化剂：在废食用油生产FAME中的应用

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The main purpose of this work is to investigate the application options of the char produced from gasification plants. Two promising mesoporous acidic catalysts were synthesized using char as a support material. Two char samples were collected from either a dual-stage or a rising co-current biomass gasification plant. The catalysts produced from both gasification char samples were characterized for their physiochemical and morphological properties using N physorption measurement, total acidity evaluation through TPD-NH , functional groups analysis by FT-IR, and morphology determination via FESEM. Results revealed that the dual-stage char-derived mesoporous catalyst (DSC-SO ) with higher specific surface area and acidic properties provided higher catalytic activity for fatty acid methyl esters (FAME) production from waste cooking oil (WCO) than the mesoporous catalyst obtained from char produced by rising co-current gasification (RCC-SO ). Furthermore, the effects of methanol/oil molar ratio (3:1–15:1), catalyst concentration (1–5 wt.% of oil), and reaction time (30–150 min) were studied while keeping the transesterification temperature constant at 65 °C. The optimal reaction conditions for the transesterification of WCO were 4 wt.% catalyst concentration, 12:1 methanol/oil molar ratio, and 90 min operating time. The optimized reaction conditions resulted in FAME conversions of 97% and 83% over DSC-SO and RCC-SO catalysts, respectively. The char-based catalysts show excellent reusability, since they could be reused six times without any modification.
机译：这项工作的主要目的是研究气化厂生产的焦炭的应用选择。以炭为载体，合成了两种有前景的介孔酸性催化剂。从两级或并流生物质气化厂收集了两个焦炭样品。对两个气化焦炭样品生产的催化剂进行了理化和形态学特性表征，包括N吸附量测量，通过TPD-NH评估总酸度，通过FT-IR分析官能团以及通过FESEM确定形态。结果表明，具有比表面积和酸性高的双级炭衍生介孔催化剂（DSC-SO）比废食用油（WCO）产生的脂肪酸甲酯（FAME）催化活性更高。由并流气化（RCC-SO）产生的焦炭产生。此外，在保持酯交换温度恒定的情况下，研究了甲醇/油摩尔比（3：1-15：1），催化剂浓度（油的1-5 wt。％）和反应时间（30-150分钟）的影响。在65°C下。 WCO进行酯交换反应的最佳反应条件为4 wt。％的催化剂浓度，12：1的甲醇/油摩尔比和90分钟的操作时间。优化的反应条件导致FAME的转化率分别比DSC-SO和RCC-SO催化剂高97％和83％。炭基催化剂显示出极好的可重复使用性，因为它们可以进行六次重复使用而无需任何修改。

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