Study on Low-Temperature Catalytic Dehydrogenation Reaction of Tail Chlorine by Pd/Al₂O₃

Abstract

The catalytic dehydrogenation reaction of tail chlorine by Pd was studied using a fixed-bed reactor at low temperature from 30 to 100°C. Different catalyst supports such as SiO2 and Al2O3 were applied to prepare Pd catalysts by the incipient-wetness impregnation method. And the catalysts were characterized by XRD, FTIR, XPS, SEM, and N2 adsorption-desorption. The catalyst Pd loading on both SiO2 and Al2O3 had a catalytic effect on the dehydrogenation reaction, but the carrier Al2O3 was more superior. The hydrogen conversion and selectivity of hydrogen-oxygen reaction increased first and then decreased with Pd loading amount and temperature by using Pd/Al2O3 as catalysts, but the influence of temperature was limited when it was higher than 60°C. The hydrogen conversion was 97.38% and selectivity of hydrogen-oxygen reaction was 79% when the reaction temperature was at 60°C with 1 wt.% Pd/Al2O3.

Mesoporous Silica (MCM‐41) Containing Dispersed Palladium Nanoparticles as Catalyst for Dehydrogenation, Methanolysis, and Reduction Reactions

“…At low metal loading amounts (0.3 wt%), diffraction patterns of metallic palladium were not observed due to the high dispersion of small-sized Pd NPs and low metal loading (Figure 2a). [41] In Figure 2(a,b), the broad band in all the synthesized materials at 23°corresponded to the amorphous silica. [42] However, a board Scheme 1.…”

Cobaltosic Oxide Catalysts for Catalytically Removing Hydrogen from Tail Chlorine

“…The noble metal catalyst not only reduced the reaction temperature, but also greatly improved the dehydrogenation rate, but they were not only expensive, but also had a low repetition rate, which is not suitable for industrial use. 16 Therefore, Chen selected to use cheap metal. CuO/Al 2 O 3 calcined at 550 °C was used as a catalyst with a load content of 8%wt., It's average hydrogen conversion rate catalyzed at 110 °C was 90.03%.…”