期刊
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
卷 60, 期 39, 页码 14166-14175出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.iecr.1c03246
关键词
-
资金
- Dow Chemical [DE-EE0007888-09-4]
- Carnegie Mellon University [DE-EE0007888-09-4]
- American Institute of Chemical Engineers [DE-EE0007888-09-4]
This study demonstrates the direct conversion of syngas into a mixture of olefins and paraffins using a packed bed containing a physical mixture of Zn-Zr mixed oxide catalyst and SAPO-34. The kinetic measurements confirm olefin hydrogenation predominantly occurs over the SAPO-34 catalyst. A developed kinetic model and technoeconomic analysis highlight the importance of considering the olefin-to-paraffin ratio as a key performance metric for commercial scale syngas conversion.
A packed bed containing a physical mixture of both Zn-Zr mixed oxide catalyst and SAPO-34 converts syngas directly into a mixture of C-2-C-5 olefins and paraffins. Specifically, the mixed oxide catalyst is responsible for intermediate oxygenate synthesis from syngas while the molecular sieve catalyzes olefin synthesis from the oxygenate intermediates. Kinetic measurements with cofed propylene over each catalyst independently confirm olefin hydrogenation activity over both components of the composite bed. The addition of either water or CO to the feed drops the activity of propylene hydrogenation over the Zn-Zr oxide. In sum, under reaction conditions of syngas feed and produced water, olefin hydrogenation predominantly occurs over the SAPO-34 catalyst, rather than over the catalyst responsible for hydrogenating CO into oxygenate intermediates. A developed kinetic model consistent with this conclusion describes measurements at differing feed compositions, temperatures, space velocities, and bed catalyst mixing ratios. Technoeconomic analysis of the process indicates that the olefin-to-paraffin ratio is a key performance metric for commercial scale syngas conversion and highlights the importance of considering olefin hydrogenation rates over the molecular sieve component.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据