Effect of Molten Alkali on Pyrolysis of Fatty Acid Sodium Salts to Hydrocarbon

摘要

The molten alkali was investigated on the pyrolysis of fatty acid sodium salts; furthermore, the difference of pyrolysate between saturate and un-saturate fatty acid sodium salts was also given. In the presence of molten alkali, the pyrolysis of saturated sodium stearate leaded to high content of alkanes (nearly 60%) and low content of oxygen-containing compounds (almost 3%). But for the pyrolysis of un-saturated sodium oleate, high amount of aromatics (nearly 24%) and low amount of oxygen-containing compounds (1%) were detected. Compared with the pyrolysis without molten alkali, less oxygen-containing compounds were found in liquid pyrolysates. Therefore, molten alkali not only prompted deoxygenation of fatty acid sodium salts to hydrocarbons, but also had effect on the distribution of different compounds. In the process of pyrolysis, molten alkali partly changes into sodium carbonate. And the different raw materials also affected the distributions of pyrolysate.