Study of the Synthesis of Multi-Cationic Sm-Co-O, Sm-Ni-O, Al-Co-O, Al-Ni-O, and Al-Co-Ni-O Aerogels and Their Catalytic Activity in the Dry Reforming of Methane.

多阳离子 Sm - Co - O 的合成研究,Sm - Ni - O,Al - Co - O,Al - Ni - O,和 Al - Co - Ni - O 气凝胶及其在甲烷干重整中的催化活性。

• 影响指数: 4.432
• 发表时间: 2024 May 11
• 来源期刊: Gels
• DOI: 10.3390/gels10050328
• PMID: 38786245
• 文章类型: Journal Article
• 作者列表: Cihlar J,Tkachenko S,Bednarikova V,Cihlar J,Castkova K,Trunec M,Celko L

关键词: carbon deposition; cobalt; dry reformation of methane; multi-cationic aerogels; nanoparticles; nickel

Abstract

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, Sm2O3/Co, Sm2O3/Ni, Al2O3/Co, Al2O3/Ni, Al2O3/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/gcat.h). The highest content of C-deposits after catalytic tests was determined for Al2O3/Co and Al2O3/Ni catalysts, which was related to the formation of Al alloys with Co and Ni. A uniform distribution of Co0 and Ni0 nanoparticles (in the form of a CoNi alloy) was found only for the Al2O3/Co and Ni catalysts, which showed the highest activity as well as low C deposition.

摘要

致密多阳离子Sm-Co-O,Sm-Ni-O,Al-Co-O,Al-Ni-O,通过环氧化物驱动的溶胶-凝胶合成制备了Al-Ni-Co-O氧化物气凝胶。甲烷干重整催化剂，Sm2O3/Co,Sm2O3/Ni,Al2O3/Co,Al2O3/Ni,Al2O3/Co,和Ni是通过用氢气还原气凝胶制备的，并测试了它们在甲烷干法重整过程中的催化活性和碳沉积。催化测试显示高甲烷转化率(93-98%)和C-沉积(0.01-4.35mgC/gcat。h).对于Al2O3/Co和Al2O3/Ni催化剂，确定了催化测试后C沉积物的最高含量，这与Co和Ni形成铝合金有关。仅在Al2O3/Co和Ni催化剂中发现了Co0和Ni0纳米颗粒（以CoNi合金的形式）的均匀分布，表现出最高的活性以及低的C沉积。