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首页> 外文期刊>RSC Advances >Utilizing FBR to produce olefins from CO reduction using Fe–Mn nanoparticles on reduced graphene oxide catalysts and comparing the performance with SBR
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Utilizing FBR to produce olefins from CO reduction using Fe–Mn nanoparticles on reduced graphene oxide catalysts and comparing the performance with SBR

机译：利用FBR在还原的氧化石墨烯催化剂上使用Fe-Mn纳米颗粒通过一氧化碳还原反应生产烯烃，并将其性能与SBR进行比较

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摘要

Mn was used as a promoter for Fe nanoparticles (NPs) loaded on reduced graphene oxide (rGO). The prepared catalysts were the unpromoted Fe/rGO catalysts along with two Mn promoted catalysts FeMn16 and FeMn29. These catalysts were used as Fischer–Tropsch catalysts in a Fixed Bed Reactor (FBR). The operating conditions of the reactor, namely temperature, pressure and space velocity, were varied to evaluate the catalyst performance and the olefin productivity. The olefins were produced in maximum yields of 34.5% and 31.3% with FeMn29 at 320 and 340 °C respectively. The ratio of light to heavy olefins was three times higher at 340 °C. The catalysts showed good stability up to 50 h of interrupted operation while varying the conditions at each interruption. The performance of the catalysts in the FBR was compared with a previous investigation carried out in an SBR under identical conditions with the same catalysts. The FBR was found to be more Mn tolerant than the SBR, giving very high conversion activity with high Mn concentrations (FeMn29). The FBR produced olefins in much higher yields than the SBR. The SBR was more selective to light olefins at low temperatures and high Mn loading levels, while the FBR produced light olefins at higher selectivities at high temperatures and high Mn concentrations.
机译：Mn用作负载在还原氧化石墨烯（rGO）上的Fe纳米颗粒（NPs）的促进剂。制备的催化剂是未助催化剂的Fe / rGO催化剂，以及两种锰助催化剂FeMn16和FeMn29。这些催化剂在固定床反应器（FBR）中用作费-托催化剂。改变反应器的操作条件，即温度，压力和空速，以评估催化剂性能和烯烃产率。用FeMn29分别在320和340℃下以最大产率34.5％和31.3％生产烯烃。轻烯烃与重烯烃的比率在340°C时高三倍。催化剂在中断操作的50小时内表现出良好的稳定性，同时在每次中断时改变条件。将FBR中催化剂的性能与先前在SBR中在相同条件下使用相同催化剂进行的研究进行了比较。发现FBR比SBR更耐Mn，在高Mn浓度（FeMn29）的情况下具有很高的转化活性。 FBR生产的烯烃产率比SBR高得多。 SBR在低温和高Mn负载水平下对轻烯烃的选择性更高，而FBR在高温和高Mn浓度下以更高的选择性生产轻烯烃。

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