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首页> 外文期刊>Fuel >Fischer-Tropsch synthesis: ~(14)C labeled 1-alkene conversion using supercritical conditions with Co/Al_2O_3
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Fischer-Tropsch synthesis: ~(14)C labeled 1-alkene conversion using supercritical conditions with Co/Al_2O_3

机译：费-托合成：使用Co / Al_2O_3的超临界条件，〜（14）C标记的1-烯烃转化

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摘要

Under a pressure tuned supercritical fluid mixture of pentane/hexane as the media and using Co/Al_2O_3 as the catalyst, the Fischer-Tropsch synthesis (FTS) reaction was conducted in a fixed bed reactor. ~(14)C-labeled decene, tetradecene, and nonadecene were chosen as probe compounds to study the chemical behavior of the added mid-carbon number olefin under FTS supercritical reaction conditions. In the case of the run with decene, 21.8 percent of the added decene was reduced to decane, 73.5 percent remained unchanged, and only 4.7 percent of the added decene was incorporated into higher carbon number compounds. For the tetradecene and nonadecene runs, the percentages of reduction of the added olefin are 23.4 and 2.5 percent, while the percentages of incorporation are 2.6 and 1.5 percent, respectively. The molar radioactivity of the incorporated compounds decreases with increasing molecular size, indicating the presence of some accumulated products under these reaction conditions. The a value calculated based on the relative radioactivity of the incorporated compounds is 0.62, which is smaller than the value obtained from normal FTS under the same reaction conditions. These results indicate that the added mid-carbon number olefin cannot significantly alter the product distribution in favoring the heavier products.
机译：在戊烷/己烷作为介质的压力调节超临界流体混合物中，并使用Co / Al_2O_3作为催化剂，在固定床反应器中进行费托合成（FTS）反应。选择〜（14）C标记的癸烯，十四碳烯和十九碳烯作为探针化合物，以研究添加的中碳数烯烃在FTS超临界反应条件下的化学行为。在使用癸烯的情况下，将21.8％的添加癸烯还原为癸烷，保持73.5％不变，仅将4.​​7％的添加癸烯掺入较高碳原子数的化合物中。对于十四碳烯和十九碳烯，添加的烯烃的还原百分比为23.4％和2.5％，而引入百分比分别为2.6％和1.5％。所掺入化合物的摩尔放射性随分子大小的增加而降低，表明在这些反应条件下存在一些积聚的产物。基于所掺入化合物的相对放射性计算的α值是0.62，小于在相同反应条件下从常规FTS获得的值。这些结果表明，添加的中等碳原子数的烯烃不能显着改变产物的分布，而有利于较重的产物。

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