| 초록 |
Steam methane reforming (SMR) reaction has been a promising approach to generate hydrogen by using natural gas mainly consisting of methane (CH4 + H2O -＞ CO + 3H2), which was commonly operated using a nickel-based catalyst at the high temperatures above 700 oC. However, the commercial nickel catalysts for steam reforming of methane showed low activity caused by non-monodispersed and sintering of active particles at high temperature as well as poor stability resulting from coke deposition during reaction. In this study, we developed nickel/silica-alumina hybrid nanocatalyst, combined Ni@SiO2 yolk-shell with Ni/γ-alumina catalysts, for the steam reforming of methane. The prepared nanocatalyst with high contents of Ni (~40 wt%) was applied to 0.1 Nm3/h-scaled reformer for the H2 production at the 700 oC with high GHSV condition of 33,000 h-1 and showed high CH4 conversion (＞86%) with the H2 production (＞125 L/h ) in the steam methane reforming reaction. |
