Role of Re in Pt–Re/TiO2 catalyst for water gas shift reaction: A mechanistic and kinetic study

Study of the Suitability of a Pt-Based Catalyst for the Upgrading of a Biomass Gasification Syngas Stream via the WGS Reaction

“…Fig. 4 and also with results published elsewhere [21] for which it is stated that the reverse water gas shift reaction (RWGS) can only be neglected when CO conversion is less than 95%. As in the studies reported in our work CO conversion reached values higher than 95%, the RWGS reaction might be one possible reason for the final drop in activity at the highest temperature tested in every catalytic run.…”

Ceria Nanoshapes—Structural and Catalytic Properties

“…In the first stage, a high-temperature shift (HTS) is performed at 300-450 °C, followed by a low-temperature shift (LTS) reaction operated at 180-230 °C [64]. Industrial catalysts for HTS and LTS stages are Fe 2 O 3 promoted with Cr 2 O 3 and Cu on ZnO/Al 2 O 3 , respectively [10,24,65].…”

“…This is due to its unique redox properties and high oxygen storage capacity (OSC), allowing it to quickly switch oxidation state between Ce 4+ and Ce 3+ in the stable fluorite structure [10,11]. Because of these redox properties, CeO 2 is used in a wide range of applications such as an ultraviolet absorber in sun blocks [12], O 2 sensors [13,14], and antioxidant in the field of biomedicine [15].…”

MgO–Al2O3 Mixed Oxides-Supported Co–Mo-Based Catalysts for High-Temperature Water–Gas Shift Reaction

“…An emerging application for the WGSR is in the field of fuel cell for removing CO, which is a strong poison of proton exchange membrane (PEM) anode catalysts [4,5]. In the industrial processes such as methanol synthesis and ammonia synthesis, where considerable quantities of H 2 are required, two types of catalysts are widely used, i.e., Fe-Cr catalysts used for the high-temperature shift (310-450°C) and Cu-Zn catalysts used for the low-temperature shift (200-250°C) [1,3,6,7]. However, these two types of WGSR catalysts are high sensitive to sulfur contaminations.…”

“…Reaction conditions: total pressure = 2.0 MPa, GHSV = 3000 h -1 , and steam gas ratio = 0.are sulfur-tolerant. Thus, they could be applied in coal-and heavy oil-derived feedstocks.The deteriorative conditions were designed for testing the stability of the catalysts of Co-Mo-K6 /Al 2 O 3 , Co-Mo-K 4 /MgO-Al 2 O 3 , and Co-Mo/MgO-Al 2 O 3 . The results are presented in Fig.…”