Medrano José-Antonio, Julián Ignacio, Herguido Javier, Menéndez Miguel
Catalysis, Molecular Separations and Reactor Engineering Group (CREG), Aragón Institute for Engineering Research (I3A), University of Zaragoza, Zaragoza 50018, Spain.
Membranes (Basel). 2013 May 14;3(2):69-86. doi: 10.3390/membranes3020069.
Several reactor configurations have been tested for catalytic propane dehydrogenation employing Pt-Sn/MgAl2O4 as a catalyst. Pd-Ag alloy membranes coupled to the multifunctional Two-Zone Fluidized Bed Reactor (TZFBR) provide an improvement in propane conversion by hydrogen removal from the reaction bed through the inorganic membrane in addition to in situ catalyst regeneration. Twofold process intensification is thereby achieved when compared to the use of traditional fluidized bed reactors (FBR), where coke formation and thermodynamic equilibrium represent important process limitations. Experiments were carried out at 500-575 °C and with catalyst mass to molar flow of fed propane ratios between 15.1 and 35.2 g min mmol-1, employing three different reactor configurations: FBR, TZFBR and TZFBR + Membrane (TZFBR + MB). The results in the FBR showed catalyst deactivation, which was faster at high temperatures. In contrast, by employing the TZFBR with the optimum regenerative agent flow (diluted oxygen), the process activity was sustained throughout the time on stream. The TZFBR + MB showed promising results in catalytic propane dehydrogenation, displacing the reaction towards higher propylene production and giving the best results among the different reactor configurations studied. Furthermore, the results obtained in this study were better than those reported on conventional reactors.
已经对几种反应器配置进行了测试，以采用Pt-Sn/MgAl2O4作为催化剂进行催化丙烷脱氢反应。与多功能两区流化床反应器（TZFBR）耦合的Pd-Ag合金膜，除了能原位再生催化剂外，还能通过无机膜从反应床中去除氢气，从而提高丙烷转化率。与使用传统流化床反应器（FBR）相比，后者结焦和热力学平衡是重要的工艺限制因素，因此实现了两倍的过程强化。实验在500-575°C下进行，催化剂质量与进料丙烷摩尔流量之比在15.1至35.2 g min mmol-1之间，采用三种不同的反应器配置：FBR、TZFBR和TZFBR+膜（TZFBR+MB）。FBR的结果显示催化剂失活，在高温下失活更快。相比之下，通过使用具有最佳再生剂流量（稀释氧气）的TZFBR，在整个运行期间工艺活性得以维持。TZFBR+MB在催化丙烷脱氢方面显示出有前景的结果，使反应朝着更高的丙烯产量方向进行，并在所研究的不同反应器配置中给出了最佳结果。此外，本研究获得的结果优于传统反应器的报道结果。
