Catalytic Activity of Ni Based Materials Prepared by Different Methods for Hydrogen Production via the Water Gas Shift Reaction

نویسندگان

چکیده

Water gas shift reactions (WGS) were evaluated over Ni/CeO2 and Ni/CeSmO catalysts for hydrogen production. The effects of catalyst preparation method Sm loading investigated. Ni/ceria synthesized by combustion, sol gel gel-combustion method. After WGS tests, the determined carbon deposition thermogravimetric analysis. analysis temperature programmed NH3 desorption showed that addition promoter made higher weak acid sites lower amount than unpromoted due to it being easily removed. CO chemisorption result indicated Ni/Ce5%SmO prepared combustion has highest Ni metal dispersion metallic surface area compared other catalysts. enhancement activity this is more active exposed reactants. Furthermore, H2-temperature reduction confirmed an easiest catalyst. This behavior accelerates redox process at ceria enhances oxygen vacancy concentration. catalytic measurements exhibited optimum was 5% wt. best high small crystallite size 5%Ni/Ce5%SmO (combustion) resulted in sufficient dispersion, which closely related

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Dynamic Model For Production of Biohydrogen Via Water- Gas Shift Reaction (RESEARCH NOTE)

In design of anaerobic bioreactor, rate equation is commonly used. Mathematical model was developed at steady state condition, to project concentration of gaseous substrate and product in biological oxidation of carbon monoxide with water to produce hydrogen and carbon dioxide. The concept of bioconversion was based on transport of CO from gas phase to liquid phase, as the CO consumption was in...

متن کامل

Hydrogen rich gas production via nano-catalytic gasification of bagasse in supercritical water

Ru/Al2O3 nano-catalysts were prepared with impregnation and microemulsion techniques. The supercritical water gasification reaction was performed at 400oC and 5-60 min. Within the tested operation conditions, the reaction residence time of 15 min was the optimum to maximize the H2 yield. It was observed that using microemulsion technique increases the total gas yield significantly. Using microe...

متن کامل

Production of fuel - cell grade hydrogen by sorption enhanced water gas shift reaction using Pd / Ni - Co catalyst

It has been demonstrated both thermodynamically and experimentally that fuel-cell grade hydrogen can be produced by a one-step sorption enhanced water gas shift (SEWGS) process at about 500 oC, where the water gas shift (WGS) catalyst and the CO2 sorbent are highly integrated. A synthetic CaO-based mixed oxide sorbent was also assessed, which showed a good CO2 capture capacity and stability in ...

متن کامل

Synthesis of Improved Catalytic Materials for High-Temperature Water-gas Shift Reaction

In this investigation, we report the preparation and characterization of Co-, Cuand Mn-substituted iron oxide catalytic materials supported on activated carbon. Co-precipitation method and low temperature treatment were used for their synthesis. The influence of chemical composition, stoichiometry, particle size and dispersity on their catalytic activity was studied. Samples were characterized ...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Catalysts

سال: 2023

ISSN: ['2073-4344']

DOI: https://doi.org/10.3390/catal13010176