Method for analyzing nitrogen-containing compound in heavy oil

Abstract

The invention provides a method for analyzing a nitrogen-containing compound in heavy oil. The method comprises the following steps: 1) adding an internal standard substance into a heavy oil solution to obtain a to-be-resolved solution, and then carrying out ionization treatment on the to-be-resolved solution; 2) detecting the system subjected to ionization treatment by using a high-resolution mass spectrometer to obtain first information; 3) detecting the system subjected to ionization treatment by using a trapped ion mobility-time-of-flight mass spectrometer to obtain second information; and 4) analyzing the nitrogen-containing compound by using the first information and / or the second information to obtain analysis information. According to the method for analyzing the nitrogen-containing compound in heavy oil, the composition and structural distribution of the nitrogen-containing compound in the heavy oil can be rapidly, simply and conveniently represented, the structural dispersity and structural size information of the nitrogen-containing compound can be obtained, and the method has the advantages that the nitride response strength is high, mobility information is accurate and efficient, and spectrogram analysis is easy.

Description

technical field [0001] The invention belongs to the technical field of heavy oil analysis and relates to an analysis method for nitrogenous compounds in heavy oil. Background technique [0002] The elemental composition of heavy oil is mainly carbon, hydrogen, oxygen, nitrogen, and sulfur. Although the content of nitrogen is small, nitrogen-containing compounds have adverse effects on the processing of heavy oil and the use and storage performance of products, which will make the processing process The catalyst is poisoned and deactivated, the stability of the oil product is reduced, and the combustion produces nitrogen oxides, causing environmental pollution. Hydrogenation of heavy oil is an important way to remove nitrogen compounds, and the analysis of nitrogen-containing compounds is of great significance to the hydrogenation removal of nitrogen compounds. Due to the complex composition of heavy oil molecules, it is difficult to characterize them at the molecular level....

AI Technical Summary

Problems solved by technology

Due to the relatively low resolution of the trapped ion mobility-time-of-flight mass spectrometer and the problems of mass and mobility drift, there is no mature method for the characterization of nitrogen-containing compounds in heavy oils with complex compositions.

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