Reverse Microemulsion-Synthesized High-Surface-Area Cu/γ-Al 2 O 3 Catalyst for CO 2 Conversion via Reverse Water Gas Shift

• Published in: ACS applied materials & interfaces 2022-05, Vol.14 (19), p.22082-22094
• Main Authors: Zakharova, Anastasiia, Iqbal, Muhammad Waqas, Madadian, Edris, Simakov, David S A
• Format: Article
• Language: English
• ISSN: 1944-8244; 1944-8252
• DOI: 10.1021/acsami.2c01959

Reverse microemulsion method was implemented to synthesize a CuO/γ-Al O catalyst (18 wt % Cu) with a specific surface area (SSA) of 328 m /g (after calcination at 400 °C). Catalytic performance was evaluated in the range of temperatures and space velocities (300-600 °C and 10,000-200,000 mL/(g h)). The catalyst was 100% selective to CO generation while attaining a nearly equilibrium CO conversion at 500 °C (ca. 50% at 10,000 mL/(g h) and H /CO = 4). Despite the initial reduction of surface area under the reaction conditions, the reduced Cu/γ-Al O catalyst demonstrated a stable performance for 80 h on stream, attaining a nearly equilibrium CO conversion at 600 °C (ca. 60% at 60,000 mL/(g h) and H /CO = 4). The selectivity to CO generation remained complete during the stability test, and no significant carbon deposition was detected.