TY - JOUR T1 - Unexpectedly Promoting Effect of Carbon Nanotubes Grown During the Non-oxidative Coupling of Methane over Copper Catalysts AU - Zeng, Zhi-Yan AU - Chen, Jian AU - Lin, Jarrn-Horng Y1 - 2018/12/31 PY - 2018 DA - 2018/12/31 N1 - doi: 10.31716/frt.201801007 DO - 10.31716/frt.201801007 T2 - Frontier Research Today JF - Frontier Research Today JO - Front. Res. Today. SP - 1007 VL - 1 C7 - 1007 PB - Frontier Research Today S.A. SN - N2 - ABSTRACT: One of the challenges for the non-oxidative coupling of methane (NOCM) is to effectively remove the deposited coke over catalysts owing to the over-dehydrogenation of methane. Herein, we show that an in-situ growth of carbon nanotubes (CNTs) instead of coke were observed during NOCM over a CuSO4/纬-Al2O3 catalyst. The as-grown CNTs depict an unexpected promoting effect for NOCM with a highest activity of 0.48 mol kg cat-1路h-1, and maintained 85% activity after 200 h running time. The equilibrium methane conversion is 9.8 % with a selectivity of 78.2 % for C2 (C2H4 + C2H6) products. Highly dispersed Cu nanoparticles distributed on the top of CNTs measured by transmission electron microscopy is proposed to result in high catalyst stability during NOCM for 200h instead of deactivation in several hours. Here, we firstly prove that the as-grown CNTs can promote the catalytic activity of NOCM instead of deactivation by coking over catalysts. M3 - doi: 10.31716/frt.201801007 UR - http://dx.doi.org/10.31716/frt.201801007 ER -