In this study, a continuous process including biogas reforming, syngas cleaning, and syngas conversion was designed and developed to demonstrate biogas-to-liquid (BTL) hydrocarbons fuel technology (Figure 1). Biogas feedstock composed of 60% CH4 and 40% CO2 was reformed at 8,000 h-1 gas hourly space velocity (GHSV) under atmospheric pressure. The reaction temperatures ranged from 750 to 850�C and O2/CH4 ratio of 1/6. The reforming catalyst used for this test was Pt based catalyst. As presented in Table 1, high concentrated syngas (H2+CO) was obtained from biogas reforming. The syngas yield increased with the increasing reaction temperature and reached 94% at 850�C. The H2/CO ratio was maintained about 1.2. As shown in Figure 1, the cleaning and purification system was developed to remove the impurities in the syngas, i.e., moisture, oxygen, sulfur, ammonia, tar and etc. This fixed bed reactor system can incorporate a single 1/2 inch reactor tube. It is highly automated and can properly maintain and control three critical operation parameters: temperature, pressure, and flow rate. The liquid products generated by catalytic conversion can be readily upgraded to transportation fuels since they are primarily composed of hydrocarbons initially. 

Biogas to hydrocarbons via biogas reforming, syngas cleaning, and catalytic conversion

248th National Meeting (2014)

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