Biogas dry reforming over Ni/LnOx-type catalysts (Ln = La, Ce, Sm or Pr)

Chemical Looping Dry Reforming of Methane over Ni-Modified WO3/ZrO2: Cooperative Work of Dispersed Tungstate Species and Ni over the ZrO2 Surface

“…The total cycle number in the present CL-DRM over Ni/WO 3 (10)/ZrO 2 is the highest among the previously reported CL-DRM systems (Table S2). − In another conventional DRM experiment performed at 750 °C, 1% CH 4 /1% CO 2 /He continuously flowed over Ni/WO 3 (10)/ZrO 2 . Initially, more than 99% of CH 4 and CO 2 were converted in conventional DRM (squares in Figure ); however, the conversions monotonically decreased with time.…”

“…The excessive emission of greenhouse gases (GHG) such as methane (CH 4 ) and carbon dioxide (CO 2 ) has become a global environmental problem. , CH 4 and CO 2 valorization, a favorable route to reduce GHG emissions, have been a subject of intense research. − Dry reforming of methane (DRM) is a promising catalytic reaction that can convert CH 4 and CO 2 to syngas (CO and H 2 ). ,− Although several efficient and durable catalyst systems for DRM have been developed recently, most reported catalyst systems suffer from certain drawbacks, such as catalyst deactivation due to coke deposition and undesired CO 2 reduction by the generated H 2 . Chemical looping dry reforming of methane (CL-DRM) has received considerable attention as an alternative technology to circumvent these drawbacks.…”

Dry Reforming of Methane over Rare-Earth Metal Oxide Ni–M–Al (M = Ce, La) Catalysts

“…23 The best performance was observed for Ni/La 2 O 3 , in which the LaNiO 3 perovskite structure was formed. 7 Although CeO 2 and PrO x possess larger redox activity and oxygen mobility, the catalytic activity of Ni/CeO 2 and Ni/PrO x catalysts was significantly lower in comparison to that of Ni/La 2 O 3 and Ni/ Sm 2 O 3 . It was stated in 19 As a comparison, the Ni catalyst supported onto a commercial alumina gave initial conversion values of CH 4 and CO 2 of 50 and 60%, respectively, decreasing thereafter, while the H 2 /CO ratio remained constant for 20 h (Table S1, entry 4).…”

Strontium‐promoted Ni/ZrO2–Al2O3 catalysts for dry reforming of methane

“…Similarly, the dry reforming of biogas using perovskite catalysts indicated that the Lanthanide promotion resulted in lower coke formation due to the interaction of the rare-earth oxide with the more reactive surface carbonaceous matter in redox reactions. 18 The cerium-supported nickel catalysts with 15 wt% Ni synthesized via microemulsion, sol-gel, and auto combustion for DRM were investigated. 19 Their findings show that the monoclinic NiO phase gives maximum activity to the Ni/CeO 2 catalyst.…”

“…On the modified catalysts, it was discovered that the deposited carbon is rapidly oxidized at high temperatures. Similarly, the dry reforming of biogas using perovskite catalysts indicated that the Lanthanide promotion resulted in lower coke formation due to the interaction of the rare‐earth oxide with the more reactive surface carbonaceous matter in redox reactions 18 . The cerium‐supported nickel catalysts with 15 wt% Ni synthesized via microemulsion, sol‐gel, and auto combustion for DRM were investigated 19 .…”