Dear community,

I came across this paper which claims that large amounts of nitrogen oxide can be produced during the hydrothermal liquefaction of microalgae:

"In addition, the HTL pathway emits more Nitrogen oxide (NOx) and Nitrous oxide (N2O) than the lipid extraction pathway because up to 75 wt.% of N in algae feed could enter into the gas phase and be released into the atmosphere during the HTL process." Article Life cycle assessment and nutrient analysis of various proce...

My literature review so far suggests that the gas phase consists mainly of CO2, CO, CH4 and H2 in various compostions depending on reaction temperature and catalyst used. The above paper is the only one I could find that mentions NOx/N2O. I was wondering if you have references or experimental data that verify the authors' statement? I tried contacting the first author but unfortunately I received no answer.

Best regards

Benjamin