Load Type Carbon Base Catalysis Ch < Sub > 4 < / Sub > - Co < Sub > 2 < / Sub > Reforming Reaction Activity Of Study

Due to a large number of gas emission (main contain CH4and CO2)which produced from flame coal’s pyrolysis and the low chemical utilization rate of emissions of the chemical production process of shaanbei fossil energy, the method that CH4-CO2reforming to syngas was proposed in order to high efficiently utilize CH4and CO2. However, catalyst of CH4-CO2reforming is easy to the inactivation in the reaction, carbon-based catalysts offers certain advantages:durability (high temperature tolerance and resistance to sulfur); resistance to carbon formation and high activity. So we investigated carbon materials as catalysts for CH4-CO2reforming.The CO2reforming of methane was performed in a fixed bed reactor under atmosphere pressure. The characteristics of catalysts (activated carbon and YuLin char) were analyzed using BET、FT-IR and SEM etc., and we investigated the influence of oxygen functional groups, specific surface area and distribution of pore size to the catalytic activity.The first part investigated the catalytic activity of activated carbon and activated carbon modified by H2O2for CH4-CO2reforming, the result shows that:activated carbon is an activity catalyst in the reaction; the activity of the activated carbon modified by H2O2enhanced.The second part investigated the catalytic activity of activated carbon supported Ni with different calcination temperature and nickel loading. The result shows that:the catalytic activity of activated carbon supported Ni is higher than unmodified activated carbon; the higher the nickel loadings, the higher catalytic activity and the greater mass loss; catalytic activity of10%Ni/AC is the best, the conversion rate of CH4and CO2are above95%at900℃.The third part investigated the catalytic activity of YuLin char supported Ni and YuLin char modified by H2O2. The result shows that:the catalytic activity of YuLin char is far less than activated carbon; the catalytic activity of YuLin char modified by H2O2changes little; the catalytic activity of YuLin char supported Ni significantly improved; YuLin char supported Ni unlike activated carbon supported Ni which catalytic activity increase with the increase of the loading, this shows that the loadings of different supporters will probably have different best value.From analysis by FTIR、BET and SEM etc., we found that carbon-based catalysts modified by H2O2can make change of the surface area, pore size distribution and functional group (ether oxygen, Carbonyl, carboxyl, phenolic hydroxyl). This changes cause the catalytic activity of catalysts changed. The catalysts supperted Ni metal and after calcination at600℃which surface area and mesoporous increased have high activity and resistance to carbon formation.