Effect of Ni content on CO2 methanation performance with tubular-structured Ni-YSZ catalysts and optimization of catalytic activity for temperature management in the reactor |
| |
| Affiliation: | 1. Research Institute of Energy Frontier, National Institute of Advanced Industrial Science and Technology (AIST), 16-1 Onogawa, Tsukuba, Ibaraki 305-8569, Japan;2. Inorganic Functional Materials Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2266-98 Anagahora, Shimo-shidami, Moriyama-ku, Nagoya 463-8560, Japan;1. National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8568, Japan;2. Taiyo Nippon Sanso Corporation, Tsukuba, Ibaraki 300-2611, Japan;1. Univ Pau & pays de l’Adour, Laboratoire de Thermique Energétique et Procédés – IPRA EA1932, 64000 Pau, France;2. ENOSIS, 12 rue Louis Courtois de Vicose, 31400 Toulouse, France;1. Department of Applied Chemistry and Biochemical Engineering, Graduate School of Engineering, Shizuoka University, 3-5-1 Johoku, Naka-ku, Hamamatsu, Shizuoka 432-8561, Japan;2. Department of Chemical Engineering, Faculty of Engineering, Mahidol University, 25/25 Puttamonthon 4rd., Nakarnprathom 73170, Thailand;3. Amano Institute of Technology, 7955-98 Hosoeocho Kiga, Kita-ku, Hamamatsu, Shizuoka 431-1305, Japan |
| |
| Abstract: | This paper presents high-performance Ni-YSZ tubular catalysts for CO2 methanation prepared by the extrusion molding. We fabricated tubular-shaped Ni-YSZ catalysts with various Ni contents (25–100 wt% NiO) and investigated the effect of Ni content on CO2 methanation performance under various temperatures and gas flow rates. Catalysts with Ni contents >75 wt% showed CH4 yields >91% above 270 °C with high CH4 selectivities (>99%). High CH4 yields were also observed under high GHSVs at 300 °C: 93% and 92% at 8700 and 17,500 h?1, respectively. Investigation of methanation with the catalysts revealed that CO2 methanation was accelerated by a localized hotspot at the reactor inlet arising from the interaction between reaction kinetics and heat generation. Using a numerical simulation, we considered the optimum arrangement of catalytic activity in the reactor to avoid hotspot generation and realize a stable high CO2 methanation performance. We can simultaneously achieve high CH4 production and prevent hotspot formation by properly arranging catalysts with different activities. |
| |
| Keywords: | Methanation Hydrogen Methane Renewable energy Temperature management |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
