GB/T 18610.2-2016 in English
VALIDCrude oil—Determination of carbon residue—Part 2: Micro method
- Issued on:2016-06-14
- Implemented on:2017-01-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
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《GB/T 18610.2-2016原油 残炭的测定 第2部分：微量法》由TC355（全国石油天然气标准化技术委员会）归口，TC355SC10（全国石油天然气标准化技术委员会油气计量及分析方法分会）执行，主管部门为国家标准化管理委员会。
Introduction
GB/T 18610.2—2016 Standard Overview
GB/T 18610.2—2016 "Determination of carbon residue in crude oil Part 2: Micro method" is the national standard of the People's Republic of China, which is used to determine the carbon residue content in crude oil. This standard is applicable to crude oil samples with a water content not exceeding 0.5% and a carbon residue value in the range of 0.01%~30.0%.
Background of Standard Formulation
Crude oil carbon residue is an important indicator for evaluating the quality and characteristics of petroleum products, and directly affects the refining process and the quality of finished products. As an efficient and accurate determination method, the micro method is widely used in laboratory testing. The formulation of this standard aims to standardize the micro method determination process and ensure the consistency and reliability of the data.
Technical requirements and methods
| Project | Specific requirements | Key parameters |
|---|---|---|
| Sample preparation | Sampling shall be carried out in accordance with GB/T 4756 or GB/T 27867. Dehydration shall be required if the water content exceeds 0.5%. | - Sample volume: Select a sample bottle of appropriate capacity according to the carbon residue value- Dehydration method: SY/T 6520 pressure autoclave method |
| Instrument requirements | Use a dedicated instrument for measuring trace carbon residue, including a green coke oven, a sample bottle holder and a thermocouple thermometer. | - Coke oven heating rate: 10°C/min~40°C/min - Sample bottle material: soda-lime glass or borosilicate glass |
| Measurement steps | Heat the sample to 500°C in an inert gas flow (nitrogen), keep it for 15 minutes, and weigh the residue after cooling. | - Nitrogen flow rate: 150 mL/min~600 mL/min - Heating temperature: 500°C±2°C |
Actual application case
A petroleum laboratory used this standard to determine the carbon residue of a batch of crude oil samples and found that when the carbon residue value was close to 5%, it was more appropriate to choose a 2 mL sample bottle. By comparing the experimental data, it was confirmed that the repeatability and reproducibility of the method met the requirements of Table 2.
Implementation recommendations
- Select the sample bottle capacity and sample volume strictly in accordance with the standard requirements.
- Calibrate the instruments and equipment regularly to ensure that the temperature is controlled within the specified range.
- Establish a quality assurance system and use standard control samples to verify the measurement results.
- Pay attention to safe operation to avoid the formation of explosive mixtures of oil vapor and air.
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