Nitrogen-doped carbon nanotube spheres as metal-free catalysts for the partial oxidation of H₂S

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• 作者：Housseinou Ba^a ; ^b ; Cuong Duong-Viet^a ; ^c ; Yuefeng Liu^a ; ^{yuefeng.liu@unistra.fr" class="auth_mail" title="E-mail the corresponding author} ; Jean-Mario Nhut^a ; Pascal Granger^b ; Marc J. Ledoux^a ; Cuong Pham-Huu^a ; ^{cuong.pham-huu@unistra.fr" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Nitrogen-doped carbon nanotubes ; Macroscopic shape ; Metal-free catalyst ; Desulfurization ; H2S oxidation
• 刊名：Comptes Rendus Chimie
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：19
• 期：10
• 页码：1303-1309
• 全文大小：1383 K

文摘

Nitrogen-doped carbon nanotubes (N-CNTs) with macroscopic shaping were synthesized by a coagulation route using alginate as a coagulating agent and the as-synthesized sample was used as metal-free catalysts in the partial oxidation of H₂S into elemental sulfur. The N-CNT beads display a relatively high desulfurization activity along with a high stability as a function of time on stream. The desulfurization performance of the N-CNT beads was also measured and compared to that of the Fe₂O₃/SiC catalyst. The N-CNT beads display a higher desulfurization activity under the similar reaction conditions with, however, lower sulfur selectivity due to the problem of diffusion of the reactant through the bead porosity.