We recognize that the third-party test report is not only a guarantee of product quality, but also a key condition for the successful entry of products into supermarkets or e-commerce platforms. As an important raw material in the petrochemical industry, the performance of residue directly affects the quality and environmental safety of downstream products. Therefore, systematic detection of residue is a necessary measure to ensure its use effect and safety. So, what are the main items of residue testing?
The first and foremost part of the residue testing project is the evaluation of its physical properties. This includes the determination of basic physical parameters such as specific gravity, viscosity, boiling point range, etc. Specific gravity is an important indicator to measure the ratio of residue density to water density, which can indirectly reflect the proportion of light reconstituted components in residue. Viscosity is a physical quantity that characterizes the flow resistance of residue, which is directly related to the conveying and processing of residue. The boiling point range can show the evaporation characteristics of different components in the residue, which has important guiding significance for the subsequent fractionation process.
The chemical composition analysis of the residue is also one of the key items of detection. This typically includes the determination of components such as saturated hydrocarbons, aromatic hydrocarbons, gums, and asphaltenes. Saturated hydrocarbons and aromatic hydrocarbons are light components in residual oil, and their content affects the combustion performance and stability of residual oil. Gums and asphaltenes are used as recombinant components, and their content is closely related to the viscosity and thermal stability of the residue. With chemical composition analysis, the processing potential and application areas of residual oil can be more accurately assessed.
The analysis of impurities in the residue is also a detection item that cannot be ignored. The determination of sulfur content is particularly important because sulfur dioxide is formed after it is burned, which can corrode the environment and equipment. In addition, the levels of nitrogen, oxygen, and metal elements (e.g. nickel, vanadium, etc.) need to be strictly controlled, as they can cause catalyst poisoning or equipment corrosion during residue processing. By detecting these impurities, the environmental risks of the residue and the feasibility of the processing process can be assessed.
The evaluation of thermal properties is also part of the residue test. Thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) are commonly used thermal analysis techniques to evaluate the thermal stability and reaction characteristics of residues at different temperatures. These thermal performance parameters are critical for the processing and application of residual oil, especially during high-temperature cracking or combustion.
In order to ensure the quality and safety of the residue, it also needs to be subjected to a series of safety tests. This includes the determination of ignition point, flash point and spontaneous ignition point, which reflect the fire risk of the residue during storage and transportation. At the same time, the detection of harmful substances such as polycyclic aromatic hydrocarbons in residual oil is also an important aspect to evaluate its environmental safety performance.
The residue testing items cover many aspects such as physical properties, chemical composition, impurity content, thermal performance and safety. Through these meticulous tests, we can comprehensively evaluate the quality of residue and provide a scientific basis for its rational application in the petrochemical industry.