Abstract
The effect of magnetic inducement in support preparation was studied to reduce coke and improve the activity of Ni catalysts for ethanol steam reforming (ESR) at 550–650 °C. Magnetic inducement was introduced to prepare 5 mol % CeO2 in Al2O3 support in order to control the composition and the distribution of Ce in Al2O3. The results show that using CeO2–Al2O3 support with magnetic inducement affects both hydrogen production and coke reduction, where Ni/CeO2–Al2O3 support prepared under magnetic inducement with N–N pole arrangement (Ni/CeO2–Al2O3 (N–N)) exhibited the highest hydrogen production and the lowest coke formation among the catalysts used in this work. Compared with Ni/CeO2–Al2O3 (no magnet), Ni/CeO2–Al2O3 (N–N) catalysts yield 14.0% higher H2 production and 31.7% less coke production. The modified catalyst preparation process used in this study could create catalysts for hydrogen production from ESR which are high in performance and stability but low in preparation cost.
Highlights
Ethanol steam reforming (ESR) is one of the reforming reactions of hydrocarbon to produce H2, which is considered as a renewable energy source due to ethanol production from biomass fermentation.ESR pathways comprise many reaction routes [1]
This work aimed to increase the activity of Ni catalysts at low temperatures and reduce coking, which was accomplished by support modification of CeO2 partial doping into an Al2 O3 framework with magnetic inducement
The supports prepared under the same pole magnetic inducement
Summary
Ethanol steam reforming (ESR) is one of the reforming reactions of hydrocarbon to produce H2 , which is considered as a renewable energy source due to ethanol production from biomass fermentation.ESR pathways comprise many reaction routes [1]. Coking is a long-term catalyst deactivation due to carbon deposition overactive metal sites during a reaction which commonly occurs in hydrocarbon reforming [2,3,4,5]. An appropriate catalyst for ESR promotes the main reaction over the side reactions that produce CO, which is a coke precursor. The best catalysts for ESR reported in the literature are Rh-based catalysts which are active at 600 ◦ C with low coking [6,7,8]. The literature reports that among non-noble metal catalysts (Cu, Zn, Co, Ni), Ni exhibits the highest activity for ESR [6,9]. Ni-based catalysts can suffer from deactivation due to coking at reaction temperatures as low as 500 ◦ C at certain reaction conditions [10]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
