The formation and subsequent accumulation of coke is one of the major reasons for the catalyst deactivation in methane reforming reaction. Although the investigation of coke-resistant catalysts is closely related to their long-term stability of given catalysts, it takes a long time to quantitatively measure the amount of carbon deposition on catalysts under normal reaction operational conditions. To overcome this problem, we used the steam deficient reaction condition, i.e. a low steam-to-carbon ratio (S/C) of 0.5 to accelerate the carbon deposition on catalysts. In this condition, the base catalyst of 10 wt.% Ni/alumina rapidly lost its catalytic activity, indicating fast coke deposition. However, adding proper additives, such as Ru among various precious metals (Ru, Rh, Pt, and Pd) and alkaline earth metals (Mg, Ca, Sr, and Ba) with the appropriate loading (5 wt.%) effectively suppressed coke formation. The optimized catalyst composition is 0.5 wt.% Ru/5 wt.% Mg/10 wt.% Ni/alumina, which displayed coke resistance in the long-term stability test of steam methane reforming and 40 h test of dry reforming of methane. These experimental results indicate that the method developed in this study is useful for the rapid evaluation of given catalysts for their coke resistance.

焦炭的形成和随后的积聚是甲烷重整反应中催化剂失活的主要原因之一。尽管耐焦炭催化剂的研究与其给定催化剂的长期稳定性密切相关，但是在正常反应操作条件下定量测量催化剂上的碳沉积量仍需要花费很长时间。为了克服这个问题，我们使用了蒸汽不足的反应条件，即0.5的低蒸汽碳比（S / C）来加速碳在催化剂上的沉积。在这种条件下，含10％（重量）Ni /氧化铝的基础催化剂迅速失去了催化活性，表明焦炭快速沉积。但是，在各种贵金属（Ru，Rh，Pt和Pd）和碱土金属（Mg，Ca，Sr，Ba和Ba）以适当的负载量（5重量％）有效地抑制了焦炭的形成。优化的催化剂组合物为0.5重量％Ru / 5重量％Mg / 10重量％Ni /氧化铝，其在蒸汽甲烷重整的长期稳定性测试和甲烷干重整的40小时测试中显示出耐焦炭性。这些实验结果表明，本研究开发的方法可用于快速评估给定催化剂的耐焦炭性。