The effect of the sandblasting method on the performance of LaNiO3/γ-Al2O3 adhesion in a microchannel reactor for dry reforming of methane process

Abstract

Abstract Dry methane reforming to produce hydrogen gas has been one of the most popular methods in recent years. For this purpose, the performance of thin-film LaNiO3 and LaNiO3/γ-Al2O3 perovskite catalysts in a microchannel reactor has been investigated. Alumina support was used to improve the H2/CO ratio in the LaNiO3 catalyst. It should be noted that the molar ratio of CH4:CO2:He in the feed is equal to 1:1:8. Also the temperature, pressure, and residence time are 800 °C, 1 atm, and 3 s, respectively. Also, the weight of the catalyst coated on the plate for GC tests and the amount of reaction rate are g and 0.006 mol CH4/min.gr cat, respectively. Extensive characterization of these nano catalyst powder (C.P.) using XRD, FT-IR, SEM, and EDX was shown that the C.P. were synthesized correctly and no impurities were observed in the thin layer catalyst. Also, the weight of the catalyst coated on the plate for GC tests is g. The H2/CO ratio for LaNiO3/γ-Al2O3 was 0.98 and the catalyst was uniformly stable for 30 h on the stream. Since the H2/CO ratio, for LaNiO3 was 0.91 at 15h on the stream, it was found that the presence of the alumina support can significantly increase the stability and decreases the deactivation rate compared to the LaNiO3 catalyst. In other words, catalyst coating (C.C.) on stainless steel is costly and required certain coating conditions. Using the new novel sandblasting method for roughness and coating synthesized catalyst on stainless steel causes considerable adhesion of the catalyst on the surface in comparison to the other coating method with better control over the load of the catalyst.