透氧膜反应器中合成气制备过程研究

Study on preparation of syngas in an oxygen-permeable membrane reactor

以内表面积为4.1 cm2的La2NiO4致密管状透氧陶瓷膜构建膜反应器,以CH4与CO2混合进气,在880°C的条件下,通过CH4的催化部分氧化反应及CO2重整反应制备了合成气;当CH4的进气流量控制在14.1 cm3/min,CO2流量为5.6 cm3/min时合成气生成速率为36 cm3/min,CH4与CO2的转化率分别为87%和83%;与CH4单独进料相比,合成气的产率增加了约60%,H2与CO体积比从1.7下降到1.3。实验结果,在透氧膜反应器中可实现CH4、CO2共进料制备合成气。

Methane reforming with carbon dioxide was carried out at 880℃ in a reactor made with a dense La2NiO4 tubular membrane the inner surface area of which was 4. 1 cm2. When CH4 and CO2 were fed into the reactor at the rates of 14. 1 cm^3/min and 5. 6 cm^3/min respectively, syngas was formed at a rate of 36 cm^3/min with the H2 to CO ratio being 1.3 and the conversion ＇rates of CH4 and CO2 being 87 % and 83 % respectively. Compared with a feedstock of methane alone at the same rate, the syngas formation rate was improved remarkably by 60 G, and the H2/CO ratio decreased from 1.7 to 1.3. Methane can be converted to syngas through reaction with CO2 as well as with oxygen permeated through the membrane.