In-situ catalytic hydrogen production from crude oil gasification using Fe-based composite catalyst: An experimental investigation

Abstract

Against the backdrop of the global energy transition, hydrogen is gaining prominence as a clean energy carrier due to its zero emissions and high energy density. In-situ gasification of crude oil reservoirs for hydrogen production has thus emerged as a promising technology. However, conventional process of H₂ production from crude oil suffer from high operating temperatures and energy consumption. Developing effective catalysts to lower the required reaction temperature is therefore crucial.

In this study, a series of Fe-based catalysts, including Fe-Zn, Fe-Co and Fe-Ni composite catalysts, were developed. Their properties were comprehensively characterized, and their catalytic performance was evaluated through hydrous pyrolysis experiments. The results indicate that all catalysts significantly reduced the initial hydrogen production temperature. The Fe‑Ni catalyst exhibited the best performance, followed by Fe‑Co and Fe‑Zn. The abundant micropores in these catalysts facilitated the cracking of short‑chain hydrocarbon intermediates, thereby enhancing hydrogen yield. Furthermore, the presence of Fe improved the catalysts' resistance to coking. The reaction mechanism during in‑situ catalytic gasification of crude oil was also explored. This work provides theoretical insights and technical guidance for the future engineering application of in‑situ hydrogen production from crude oil gasification.

Keywords: Hydrogen production; Crude oil; In-situ gasification; Fe-based catalyst