Sono-sulfated zirconia nanocatalyst supported on MCM-41 for biodiesel production from sunflower oil: Influence of ultrasound irradiation power on catalytic properties and performance
Sono-sulfated zirconia nanocatalyst supported on MCM-41 for biodiesel production from sunflower oil: Influence of ultrasound irradiation power on catalytic properties and performance
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DOI：
10.1016/j.ultsonch.2016.09.012
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发表时间：
2017-03-01
影响因子：
8.4
通讯作者：
Haghighi, Mohammad
中科院分区：
文献类型：
--
作者：
Dehghani, Sahar;Haghighi, Mohammad
采用超声辅助浸渍/水热混合法制备了MCM-41负载的声硫酸化氧化锆纳米催化剂。通过在合成过程中改变超声处理功率（30、60和90 W）来研究辐照功率的影响，从而导致纳米催化剂具有不同的理化性质。 XRD、FESEM、EDX、FTIR 和 BET 分析显示，在高度辐照的纳米催化剂中，颗粒更小，表面积更大，颗粒聚集体更少。在 90 W 下照射 30 分钟的纳米催化剂显示出非常窄的粒径分布。大约 59% 的纳米催化剂颗粒在 1-30 nm 范围内。所研究的纳米催化剂在从葵花籽油生产生物柴油中的性能表明，与非超声处理的催化剂相比，超声辅助合成的纳米催化剂具有更高的转化率。在反应温度60℃、甲醇/油摩尔比9:1、催化剂浓度5%的恒定条件下，90W超声辐照30min，催化剂中生物柴油转化率超过96.9%。经过五个循环后，非超声处理催化剂的生物柴油转化率仍保持在较高水平（71.4％），而非超声处理催化剂的生物柴油转化率勉强达到43.5％。在超声纳米催化剂中，随着辐照功率的增加，纳米催化剂表现出更高的转化率和可重复使用性。 (C) 2016 Elsevier B.V. 保留所有权利。
Sono-sulfated zirconia nanocatalyst supported on MCM-41 was prepared by an ultrasound-assisted' impregnation/hydrothermal hybrid method. The effect of irradiation power was studied by changing power of the sonication (30, 60 and 90 W) during the synthesis which led to different physiochemical properties of the nanocatalyst. XRD, FESEM, EDX, FTIR and BET analyses exhibited smaller particles with higher surface area and less population of particle aggregates at highly irradiated nanocatalysts. The nanocatalyst irradiated at 90 W for 30 min showed a very narrow particle size distribution. About 59% of nanocatalyst particles were in the range of 1-30 nm. The performance of investigated nanocatalysts in biodiesel production from sunflower oil showed ultrasound-assisted synthesized, nanocatalysts had higher conversion in comparison to non-sonicated catalyst. Biodiesel conversion in catalyst with 90 W and 30 min ultrasonic irradiation exceeded 96.9% under constant condition at 60 degrees C reaction temperature, methanol/oil molar ratio of 9:1 and 5% catalyst concentration. After five cycles, biodiesel conversion of non-sonicated catalyst was well maintained in a high extend (71.4%) while biodiesel conversion of non-sonicated catalyst barely reached to 43.5%. Among sonicated nanocatalysts, with increasing power of irradiation, the nanocatalyst represented higher conversion and reusability. (C) 2016 Elsevier B.V. All rights reserved.