Cihlar Jaroslav, Tkachenko Serhii, Bednarikova Vendula, Cihlar Jaroslav, Castkova Klara, Trunec Martin, Celko Ladislav
Central European Institute of Technology, Brno University of Technology, Purkyňova 123, 612 00 Brno, Czech Republic.
Institute of Materials Science and Engineering, Brno University of Technology, Technicka 2, 616 69 Brno, Czech Republic.
Gels. 2024 May 11;10(5):328. doi: 10.3390/gels10050328.
Dense multi-cationic Sm-Co-O, Sm-Ni-O, Al-Co-O, Al-Ni-O, and Al-Ni-Co-O oxide aerogels were prepared by epoxide-driven sol-gel synthesis. Catalysts for dry reformation of methane, SmO/Co, SmO/Ni, AlO/Co, AlO/Ni, AlO/Co, and Ni were prepared by reduction of aerogels with hydrogen and their catalytic activities and C-deposition during dry reformation of methane were tested. Catalytic tests showed high methane conversion (93-98%) and C-deposition (0.01-4.35 mg C/gh). The highest content of C-deposits after catalytic tests was determined for AlO/Co and AlO/Ni catalysts, which was related to the formation of Al alloys with Co and Ni. A uniform distribution of Co and Ni nanoparticles (in the form of a CoNi alloy) was found only for the AlO/Co and Ni catalysts, which showed the highest activity as well as low C deposition.
通过环氧化物驱动的溶胶-凝胶合成法制备了致密的多阳离子Sm-Co-O、Sm-Ni-O、Al-Co-O、Al-Ni-O和Al-Ni-Co-O氧化物气凝胶。通过用氢气还原气凝胶制备了用于甲烷干重整的催化剂SmO/Co、SmO/Ni、AlO/Co、AlO/Ni、AlO/Co和Ni，并测试了它们在甲烷干重整过程中的催化活性和碳沉积情况。催化测试表明甲烷转化率较高（93-98%），碳沉积量为（0.01-4.35毫克碳/克小时）。催化测试后，AlO/Co和AlO/Ni催化剂的碳沉积量最高，这与Al与Co和Ni形成合金有关。仅在AlO/Co和Ni催化剂中发现了Co和Ni纳米颗粒（以CoNi合金形式）的均匀分布，这些催化剂表现出最高的活性以及较低的碳沉积。
