In this case the fatty acids would have 18-30 carbon atoms, and the final stage of the synthetic pathway would clip off the oxygen atoms to create pure hydrocarbons.

但是LS9公司也计划制造一种被称作“生物原油”的东西，其中的脂肪酸将含有18 - 30个碳原子，而在合成过程的最好阶段将剔除氧原子，从而得到纯碳氢化合物。

youdao

In this case the fatty acids would have 18-30 carbon atoms, and the final stage of the synthetic pathway would clip off the oxygen atoms to create pure hydrocarbons.

ECONOMIST: Advanced biofuels