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首页> 外文期刊>Catalysis science & technology >Hydrodeoxygenation of microalgae oil to green diesel over Pt, Rh and presulfided NiMo catalysts
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Hydrodeoxygenation of microalgae oil to green diesel over Pt, Rh and presulfided NiMo catalysts

机译：Hydrodeoxygenation微藻油的绿色柴油/ Pt、Rh和presulfided尼莫地平的催化剂

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摘要

The catalytic characteristics, activity and selectivity of 1% Pt/Al2O3, 0.5% Rh/Al2O3 and presulfided NiMo/Al2O3 catalysts have been investigated in the hydrodeoxygenation of microalgae (Nannochloropsis salina) oil to produce green diesel in a microreactor. Coke accumulation decreased in the order NiMo > Pt > Rh. The amount of formed coke over NiMo increased with reaction duration, while no on-stream time dependence was found over Pt and Rh. Rhodium was found to be very active for CH4 production via hydrocracking at its freshly reduced state. The activity and selectivity of all three investigated catalysts were positively affected by increased reaction pressure, temperature, H-2/oil ratio and residence time. The selectivity of NiMo for the hydrodehydration (DHYD) route was changed to a hydrodecarbonylation/hydrodecarboxylation (DCO/DCO2) route at a reduced H2/oil ratio and residence time, while the selectivity of Pt and Rh for the DCO/DCO2 route was not affected by the reaction conditions. The highest hydrocarbon yield, 76.5%, was obtained over 1% Pt (310 degrees C, 500 psig, 1000 SmL mL(-1) gas/oil ratio, 1.5 s residence time), which is 13.8% higher than that over NiMo (360 degrees C, 500 psig, 1000 SmL mL(-1) gas/oil ratio, 1 s residence time). The 50 degrees C decrease in the reaction temperature for Pt indicates possible energy saving via heat supply.
机译：和催化特性、活动Pt /氧化铝选择性1%,0.5% Rh /氧化铝和presulfided尼莫地平/氧化铝催化剂hydrodeoxygenation的调查微藻(Nannochloropsis盐沼)石油生产绿色柴油微反应器。尼莫地平的顺序积累减少> Pt >Rh。与反应时间,虽然没有运转中的时间被发现在Pt和Rh的依赖。发现是非常活跃的甲烷生产通过加氢裂化在其新鲜减少状态。这三个的活性和选择性研究了催化剂是积极影响通过增加反应压力、温度、2 /油比和停留时间。尼莫地平的hydrodehydration (DHYD)路线改为一个hydrodecarbonylation / hydrodecarboxylation(DCO / DCO2)路线H2 /油比和相对较弱停留时间,而Pt的选择性Rh DCO / DCO2路线没有影响反应条件。产量、Pt(310 76.5%,获得了超过1%1000度C, 500 psig, SmL毫升(1)石油/天然气比1.5年代停留时间),它是13.8%高于对尼莫地平(360摄氏度,5001000 psig SmL毫升(1)气/油比,1 s停留时间)。反应温度为泰党的指示通过供热节能。

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