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首页> 外文期刊>Chemistry: A European journal >Importance of Size and Distribution of Ni Nanoparticles for the Hydrodeoxygenation of Microalgae Oil
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Importance of Size and Distribution of Ni Nanoparticles for the Hydrodeoxygenation of Microalgae Oil

机译：Ni纳米颗粒的尺寸和分布对微藻油加氢脱氧的重要性

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摘要

Improved synthetic approaches for preparing small-sized Ni nanoparticles (d=3 nm) supported on HBEA zeolite have been explored and compared with the traditional impregnation method. The formation of surface nickel silicate/aluminate involved in the two precipitation processes are inferred to lead to the stronger interaction between the metal and the support. The lower Br?nsted acid concentrations of these two Ni/HBEA catalysts compared with the parent zeolite caused by the partial exchange of Br?nsted acid sites by Ni~(2+) cations do not influence the hydrodeoxygenation rates, but alter the product selectivity. Higher initial rates and higher stability have been achieved with these optimized catalysts for the hydrodeoxygenation of stearic acid and microalgae oil. Small metal particles facilitate high initial catalytic activity in the fresh sample and size uniformity ensures high catalyst stability.
机译：已探索出改进的合成方法，以制备载于HBEA沸石上的小尺寸Ni纳米粒子（d = 3 nm），并将其与传统的浸渍方法进行比较。推测参与两个沉淀过程的表面硅酸镍/铝酸镍的形成导致金属与载体之间更强的相互作用。与由Ni〜（2+）阳离子部分交换布朗斯台德酸位引起的这两种Ni / HBEA催化剂相比，这两种Ni / HBEA催化剂的布朗斯台德酸浓度较低，不会影响加氢脱氧速率，但会改变产物的选择性。用这些优化的催化剂对硬脂酸和微藻油进行加氢脱氧，可以获得更高的初始速率和更高的稳定性。小金属颗粒有助于在新鲜样品中实现较高的初始催化活性，尺寸均匀性可确保高催化剂稳定性。

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