We report bi-reforming and coupled reforming of methane with carbon dioxide, steam and/or oxygen to produce syngas over Ni supported on Mg-Al mixed oxide. The catalyst has been characterised in terms of specific surface area, TPR, XRD, TGA-DTG, SEM and TPO-MS analysis. Ni/Mg-Al mixed oxide exhibited Ni particle size range (11–30 nm) with a mean of 20.7 nm. Syngas H₂/CO = 2.0, suitable for methanol/Fischer-Tropsch fuel synthesis, has been achieved for both reactions (T = 1048 K, P = 1 atm). The impact of process parameters including temperature, feeding concentration and GHSV on conversion and H₂/CO ratio has been demonstrated. The Ni catalyst suffered temporal activity decline in bi-reforming that can be linked to formation of carbon whiskers encapsulated Ni particles resulting in a loss of active sites. Coupled reforming delivered higher CH₄ conversion and enhanced stability, but lower CO₂ conversion than bi-reforming under similar conditions. The enhanced stability in coupled reforming can be attributed to lower carbon deposition on Ni particles due to combustion of carbon by oxygen.

我们报道了甲烷与二氧化碳，蒸汽和/或氧气的双重重整和耦合重整，以在负载于Mg-Al混合氧化物上的Ni上产生合成气。该催化剂已根据比表面积，TPR，XRD，TGA-DTG，SEM和TPO-MS分析进行了表征。Ni / Mg-Al混合氧化物的Ni粒径范围（11–30 nm），平均值为20.7 nm。两种反应均实现了适用于甲醇/费托燃料合成的合成气H ₂ / CO = 2.0（T = 1048 K，P = 1 atm）。温度，进料浓度和GHSV等工艺参数对转化率和H _2的影响/ CO比已得到证明。Ni催化剂在双重整中的时间活性下降，这可能与碳晶须包封的Ni颗粒的形成有关，导致活性位点的损失。在相似条件下，偶联重整可实现更高的CH ₄转化率和更高的稳定性，但与双重整相比，其CO ₂转化率更低。偶合重整中增强的稳定性可归因于由于氧气燃烧碳而降低了Ni颗粒上的碳沉积。