Study of Mass Transfer Resistant Effect during Syn Gas and Hydrogen Production through CO2/CH4 Dry Reforming on La/Mg Supported Co-Ni/MSU-S Zeolite

Abstract

In this study five different catalysts xLa/MgyCo-7Ni /MSU-S are synthesized through sol-gel procedure and further tested for XRD, HRTEM, FT-IR, H₂-TPR, CO₂-TPD, and O₂-TPO skills. The mass transfer resistant effect, stability and activity of the catalytic samples were observed for syn gas and H₂gas synthesis at different reaction temperatures and various space velocities (GHSV) at atmospheric pressure. Space velocities of 2.4- 3.2 × 10⁴ mL/g^-1h^-1 were used for the determination of mass transfer resistant effect, catalytic  performance and composition of the catalyst at different reaction temperatures (700-800 ^oC) retaining constant atmospheric pressure during CO₂/CH₄ dry reforming reaction. The reaction outcomes showed that nanoparticles of nickel are highly discreted upon the promotion of Mg, La & Co oxides over MSU-S (mesoporous zeolite) through firmly contact of metal ions with HO-Si-groups of zeolite. Oxides of La (La₂O₃) in 1-3LayCozNi/MSU-S, which showed greater catalytic activity than 1-3Mg supported such catalysts. Among all five catalysts the N-/MSU-S doped with 3%La and 2%Co confirmed the best active catalyst in all respects with stability up to 75 h at of 750 ^oC. The catalyst also showed less mass transfer resistant effect at (GHSV) of 24000 mL/g^-1h^-1 than 32000 mL/g^-1h^-1