Metal carbide as a potential non noble metal catalyst for naphtha reforming
Metal carbide as a potential non noble metal catalyst for naphtha reforming
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DOI：
10.1016/j.fuel.2020.119610
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发表时间：
2020-11
期刊：
影响因子：
7.4
通讯作者：
Janardhan L. Hodala;Santhosh Kotni;B Ramachandrarao-;Bennet Chelliahn
中科院分区：
文献类型：
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作者：
Janardhan L. Hodala;Santhosh Kotni;B Ramachandrarao-;Bennet Chelliahn
在石油炼制中，重石脑油的连续催化重整是从低价值原料生产氢气和芳烃等高价值产品的重要过程。氯化氧化铝负载的 Pt-Sn 是过去七十年中公认的催化剂。然而，昂贵的贵金属的使用和由于卤素浸出引起的腐蚀是与该催化剂相关的主要问题。这些问题可以通过在合适的非氯化固体酸性载体上用具有同等活性且稳定的非贵金属催化材料代替贵金属来解决。在本研究中，Fe5C2、WC、Fe2W2C、Mo2C碳化物材料已被探索作为Pt的替代品，这些材料通过固态程序升温反应合成并负载在不同的沸石上以赋予催化剂酸性功能。在合适的反应条件下筛选这些用于重石脑油重整的催化剂组合表明，与任何其他碳化物和沸石组合相比，HY沸石负载的Mo2C被发现是一种活性催化剂，产物芳烃在50 wt%范围内，RON为96，同时保持重整油产率在91 wt%左右。
In petroleum refining, continuous catalytic reforming of heavy naphtha is an important process to produce high value products such as hydrogen and aromatics from the low-value feedstock. Pt-Sn supported on chlorinated alumina is an accepted catalyst over last seven decades. However, use of expensive noble metals and corrosion due to halogen leaching are major issues associated with this catalyst. Such problems can be addressed by replacing the precious Pt metal with equally active and a stable non-precious metal catalytic material over suitable non-chlorinated solid acidic supports. In the present study Fe5C2, WC, Fe2W2C, Mo2C carbide materials have been explored as alternatives to Pt and these materials have been synthesized by solid-state temperature-programmed reaction and supported on different zeolites for imparting acidic function to the catalyst. Screening of these catalyst combinations for heavy naphtha reforming under suitable reaction conditions shows that, Mo2C supported on HY zeolite is found to be an active catalyst compared to any other carbide and zeolite combinations, with product aromatics in the range of 50 wt%, RON of 96, while maintaining reformate yields around 91 wt%.