Synthesis of gasoline-range hydrocarbons from nitrogen-rich syngas over a Mo/HZSM-5 bi-functional catalyst

The production of gasoline-range hydrocarbons from nitrogen-rich syngas was studied over a Mo/HZSM-5 bi-functional catalyst in a bench-scale continuous stainless steel fixed-bed reactor with different reaction conditions. The reaction conditions, i.e., temperature, pressure, and gas hourly space velocity (GHSV), significantly affected the hydrocarbon selectivity. Mo/HZSM-5 was more active in a temperature zone between 350 and 380 °C, a reaction pressure of 1000 psig, and a GHSV of 600 h−1 within the test operation condition ranges that were used. More than 20 hydrocarbons were mainly identified from the oil phase sample and can be classified as iso-paraffin, aromatic and naphthene hydrocarbons. The carbon number of the oil sample from the nitrogen-rich syngas mainly contained C8–C10 hydrocarbons. A high content of nitrogen in syngas was found to have an effect on the liquid hydrocarbon distribution over the Mo/HZSM-5 catalyst.

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