Ismael Coello Ramirez and Devan Siegfried, “Decoking Performance of Alumina Forming Alloys”
Mentors: Benjamin Church and Lizeth Ortiz, Materials Science & Engineering
Newer alloys such as alumina-forming stainless steels (AFA) appear to have superior coke deposition (coking) resistance compared to typical chromia-forming stainless steels in the ethylene-making process. In this process, coking resistance is understood while removal of the coke, or decoking, has not been fully researched. Typical decoking procedures utilize air, steam, or both, but there is no evidence behind these environments’ effect on AFAs. AFA and CFA samples were placed through a series of experiments: pre-oxidation, coking, and decoking processes that looked to mimic the environments that the stainless steels would experience in actual use. XRD, SEM, EDS, hardness, and gravimetric measurements of both materials were taken at each of the processing stages mentioned before. It was found that the AFA material saw better decoking properties because of the lack of detrimental carbides like M23C6 and smaller carburized zone when compared to the CFA. Further, results showed that the most oxygen-rich environment removed coke in AFA alloys better compared to other environments and added the least amount of mass in the CFA environment compared to others.
Synchronous Presentation April 16th at 2:00pm
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Hello and thank you for your interest in this presentation! I am Ismael Coello, a senior in the materials engineering department. I enjoy reading personal finance books, drinking coffee, and learning about the materials used in the automotive industry. This research is very meaningful to me because of the opportunities that it has opened to learning new concepts and equipment. I hope you enjoy(ed) my presentation.