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Preparation of Highly Dispersed Nb2O5 Supported Cobalt-Based Catalysts for the Fischer–Tropsch Synthesis
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-06-23 , DOI: 10.1021/acs.iecr.0c01248 Guiqin Xiao 1 , Yaoyao Han 1 , Fangli Jing 2 , Muhua Chen 3 , Sufang Chen 4 , Fuzhen Zhao 1 , Shaohua Xiao 1 , Yuhua Zhang 1 , Jinlin Li 1 , Jingping Hong 1
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-06-23 , DOI: 10.1021/acs.iecr.0c01248 Guiqin Xiao 1 , Yaoyao Han 1 , Fangli Jing 2 , Muhua Chen 3 , Sufang Chen 4 , Fuzhen Zhao 1 , Shaohua Xiao 1 , Yuhua Zhang 1 , Jinlin Li 1 , Jingping Hong 1
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In this work, niobia supported cobalt catalysts with both high cobalt dispersion and high cobalt loading (15 wt %) were prepared through the assistance of glow discharge plasma treatment, and their catalytic performance was tested in Fischer–Tropsch synthesis (FTS). Plasma treatment on support and especially on the decomposition of the catalyst precursor leads to a noticeable enhancement of cobalt dispersion. However, in addition to the cobalt dispersion improvement, plasma assisted decomposition of the cobalt precursor also led to the formation of CoNb2O5, which was inactive in FTS; moreover, the small cobalt particles underwent severe sintering during the reaction and caused significant and contineous deactivation. Plasma treatment on nobia could modify its porosity and hydrophilicity and generate surface functional groups; these features enabled an improved cobalt-niobia interaction and better cobalt dispersion on CoN(P)-C than on CoN-C. The enhanced FTS activity and best reaction stability on the CoN(P)-C catalyst were due to the possession of a suitable cobalt particle size and moderate cobalt-niobia interaction.
中文翻译：
费-托合成的高分散Nb 2 O 5负载钴基催化剂的制备
在这项工作中，通过辉光放电等离子体处理制备了具有高钴分散性和高钴载量（15 wt％）的氧化铌负载的钴催化剂，并在费托合成（FTS）中测试了它们的催化性能。在载体上，特别是在催化剂前体的分解上的等离子体处理导致钴分散的显着增强。但是，除了改善钴的分散性之外，等离子体辅助的钴前体的分解也导致了CoNb 2 O 5的形成。，在FTS中无效；此外，小钴颗粒在反应过程中经历了严重的烧结，并导致显着且连续的失活。等离子处理纳米比亚可以改变其孔隙率和亲水性并产生表面官能团。这些功能使CoN（P）-C上的钴-纳米比亚相互作用得以改善，钴的分散性优于CoN-C。CoN（P）-C催化剂具有增强的FTS活性和最佳反应稳定性，这归因于拥有合适的钴粒度和适度的钴-纳米比亚相互作用。
更新日期：2020-06-23
中文翻译：
费-托合成的高分散Nb 2 O 5负载钴基催化剂的制备
在这项工作中，通过辉光放电等离子体处理制备了具有高钴分散性和高钴载量（15 wt％）的氧化铌负载的钴催化剂，并在费托合成（FTS）中测试了它们的催化性能。在载体上，特别是在催化剂前体的分解上的等离子体处理导致钴分散的显着增强。但是，除了改善钴的分散性之外，等离子体辅助的钴前体的分解也导致了CoNb 2 O 5的形成。，在FTS中无效；此外，小钴颗粒在反应过程中经历了严重的烧结，并导致显着且连续的失活。等离子处理纳米比亚可以改变其孔隙率和亲水性并产生表面官能团。这些功能使CoN（P）-C上的钴-纳米比亚相互作用得以改善，钴的分散性优于CoN-C。CoN（P）-C催化剂具有增强的FTS活性和最佳反应稳定性，这归因于拥有合适的钴粒度和适度的钴-纳米比亚相互作用。
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