Method for detecting naphtha silicon by on-line analyzer

Microwave digestion inductively coupled plasma mass spectrometry.

According to the method of microwave digestion ICP-MS to determine the silicon content in naphtha, the method of microwave digestion ICP-MS to determine the silicon content in naphtha is to put the naphtha sample into a microwave digestion tank, add nitric acid, hydrogen peroxide and hydrofluoric acid in turn, and cover it. Take another clean digestion tank, add nitric acid, hydrogen peroxide and hydrofluoric acid in turn to make a blank sample, then put the digestion tank containing the sample and the blank sample into a microwave digestion instrument, and measure the volume of the obtained constant volume solution on an inductively coupled plasma mass spectrometer after digestion.

If the content of silicon in naphtha is high, in the process of hydrofining and catalytic reforming, silicon is easy to react and deposit on the surface of hydrogenation or reforming catalyst, blocking the pores of the catalyst, leading to catalyst poisoning and deactivation.