• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Energy Conversion & Management >Tailored magnetic nano-alumina as an efficient catalyst for transesterification of waste cooking oil: Optimization of biodiesel production using response surface methodology
【24h】

Tailored magnetic nano-alumina as an efficient catalyst for transesterification of waste cooking oil: Optimization of biodiesel production using response surface methodology

机译：量身定制的磁性纳米氧化铝作为废食用油酯交换的有效催化剂：使用响应面法优化生物柴油生产

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In this study, an optimized method was presented for the preparation of Fe3O4@Al3O3 as an efficient nanocatalyst for waste cooking oil transesterification to biodiesel. The highest oil conversion was achieved using the catalyst with the Al2O3/Fe3O4 mass ratio of 0.5. It was characterized by XRD, SEM, TEM, DLS, FTIR, TPD, and VSM analysis. The XRD pattern was in agreement with the standard XRD pattern of cubic Fe3O4. The DLS analysis showed that the mean particle size of catalyst was around 193 nm. Temperature programmed desorption (TPD) of NH3 showed a broad peak at the temperature range of 400-450 degrees C, confirming the acidic sites on the surface of the catalyst. The VSM analysis confirmed that the catalyst saturation magnetization was high enough to be separated easily with a magnet. Response surface methodology was used to study the effects of time, temperature, and methanol/oil molar (M/O) ratio and their interactions on the oil conversion. According to the analysis of variance (ANOVA), the effect of time and temperature was much more significant than that of M/O ratio. In addition, the interaction between time and temperature was more significant than the other interactions. The transesterification kinetics was investigated, and the results showed the rate constants ranging from 0.001 to 0.157 min(-1) and the activation energy of 55.48 kJ mol(-1). Thermodynamic studies demonstrated that the nature of the reaction was nonspontaneous (Delta G = 93.80 kJ mol(-1) at 373 K) and endergonic (Delta H = 54.08 kJ mol(-1)). The recovery of the catalyst was successfully performed at 400 degrees C, and the performance of the catalyst was acceptable after four cycles of recovery.
机译：在这项研究中，提出了一种优化的方法来制备Fe3O4 @ Al3O3，作为一种有效的纳米催化剂，用于将食用油废油酯交换为生物柴油。使用Al2O3 / Fe3O4质量比为0.5的催化剂可获得最高的油转化率。通过XRD，SEM，TEM，DLS，FTIR，TPD和VSM分析对其进行了表征。 XRD图谱与立方Fe3O4的标准XRD图谱一致。 DLS分析表明催化剂的平均粒度为约193nm。 NH3的程序升温脱附（TPD）在400-450摄氏度的温度范围内显示出一个宽峰，证实了催化剂表面的酸性位点。 VSM分析证实，催化剂饱和磁化强度足够高，可以很容易地被磁体分离。响应面方法用于研究时间，温度和甲醇/油摩尔比（M / O）的比例及其相互作用对油转化率的影响。根据方差分析（ANOVA），时间和温度的影响比M / O比的影响大得多。另外，时间和温度之间的相互作用比其他相互作用更重要。研究了酯交换动力学，结果显示速率常数范围为0.001至0.157 min（-1），活化能为55.48 kJ mol（-1）。热力学研究表明，该反应的性质是非自发的（在373 K下Delta G = 93.80 kJ mol（-1））和endergonic（Delta H = 54.08 kJ mol（-1））。催化剂的回收在400℃下成功进行，并且在四个回收周期后催化剂的性能是可接受的。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号