Who can recommend some imported brands of analyzers for natural gas?

If it’s just the above analysis items, two chromatographs will suffice. GC1#: It is specifically used for analyzing the composition of natural gas. Using the data from this analysis, specialized software can be employed to calculate properties such as the density, calorific value, and Wobbe index of natural gas. Generally, an analysis of natural gas composition is sufficient up to C6 hydrocarbons. A column system can be configured; a single TCD detector is sufficient. Hydrogen is used as the carrier gas, and it is possible to detect hydrocarbons from C1 to C6, as well as CO, CO2, and N2. GC2#: Used to determine the total sulfur content and trace amounts of benzene in natural gas. Two sets of columns need to be configured, along with two detectors: one FID and one FPD. The carrier gas can be nitrogen or hydrogen, depending on the requirements. Additionally, trace moisture in natural gas generally needs to be measured, and an analyzer for detecting trace moisture may also be required. Brands: Agilent, Varian, Thermo Fisher, PE, Shimadzu, Hitachi

I’ve learned about it. We have also been exploring analysis methods for sulfur and nitrogen in liquefied gas; I’m not sure if any chromatographic methods can be used for this purpose. If so, please advise me

It can also be achieved using online chromatography; ABB, SIEMENS, and YOKOGAWA can all do this

Performance features of the Rosemount Analytical Instruments Model 700 gas chromatograph: This gas chromatograph is the latest product from Emerson-Rosemount Analytical Instruments； Communication is fully compatible with Ethernet and DCS distributed control systems ； The instrument’s enclosure design is suitable for on-site installation, eliminating the need for expensive analysis booths and reducing unnecessary energy consumption ； The membrane chromatography injection valve is available in 6-channel and 10-channel versions ； The TCD thermal conductivity detector can detect at the ppm level (one part in million) as a minimum ； The FID hydrogen flame ionization detector can detect at the ppb level (one billionth) ； Each 700 model online gas chromatograph undergoes rigorous extreme climate performance testing at temperatures of 0-130oF for a minimum of 24 hours ； The chromatograms of the sample flow path and the calibration flow path are automatically stored in the gas chromatograph ； Archive and save the average values of 254 items, as well as the operation and calculation data from over 3 months. Application areas: The Model 700 online gas chromatograph is suitable for various industries such as refineries, petrochemical plants, the pharmaceutical industry, food and beverage processing industries, power plants, and environmental protection projects. It is primarily used for accurately monitoring gaseous and liquid streams in continuous production processes. Specific applications include: Refineries: catalytic reforming units ； Isomerization unit ； Aromatic hydrocarbon plant. Petrochemical plant: Ethylene plant ； Polymerization unit ； Acrylonitrile plant. Natural gas processing: NGL natural gas liquid products and LNG liquefied natural gas processing plants ； Low-temperature gas treatment device. Power plant: Electricity generation plant ； Gas turbine control. Environmental monitoring: Atmospheric environment monitoring ； Monitoring of volatile organic compounds in torches and cooling towers. The gas chromatography injection valve from Rosemount Analytical is a truly distinctive product in the field of online gas chromatographs. Its development and design originated at the **National Aeronautics and Space Administration** in the United States, and this injection valve boasts a very long service life. Rosemount Analytical is the only supplier among the many current manufacturers of industrial online gas chromatographs that offers a lifetime warranty on the chromatography injection valve. The chromatography injection valve used in the 700 model online gas chromatograph is available in 6-channel and 10-channel versions, offering maximum flexibility in application. Column temperature control: The column temperature control system of the 700 model gas chromatograph contributes to the accuracy and stability of on-site analysis results, and it eliminates the need for an expensive analysis instrument cabinet. The temperature control chamber of the Model 700 chromatograph has a simple structure, with all components mounted on the surface of the chamber body, making them easy to remove. The incubator chamber is mounted on a rotatable platform; when it is necessary to remove a certain component, the chamber is taken off the platform.

Does the poster need an online or a laboratory analyzer? In laboratories, chromatography is definitely used; for analyzing the composition of natural gas, a TCD detector is employed, while an FPD detector is used for detecting sulfur. Agilent products are commonly used in such applications. For online instruments, conventional online chromatographs from ABB, Siemens, and Yokogawa are all excellent options for analyzing the composition of natural gas ； Small chromatographs specifically designed for analyzing natural gas can also be used; they are inexpensive, easy to maintain, and require little carrier gas. Common brands include Siemens, Canadian Galvanic, and Japanese Takeda. For sulfur, chromatography can be used, as well as a lead acetate strip analyzer; in China, the Galvanic 902 or 903 models from Canada are generally used for this purpose.

Reply to 6# bingo999: It’s for online use; could you provide your contact information?

:Call: The one upstairs with the information and models. Learned... or the contact information of the agent

Reply to 7# tianshg2002: For online analysis of trace amounts of benzene, a PGC equipped with a FID detector is definitely necessary. (I’m not sure what component you are analyzing at 200 ppm); if you also need to analyze the total sulfur content at 200 ppm, then use the same PGC but equipped with an FPD detector. Using a chromatograph with multiple detectors is less costly than using several separate instruments, and it also requires less maintenance. The small-scale gas chromatograph mentioned earlier is used for the routine analysis of the main components of natural gas, such as H2, CH4, CO, etc. (QQ345009769, feel free to communicate)

If using SIEMENS, ABB, YOKOGAWA, or Rosemount online, there are gas chromatographs available. Moreover, both SIEMENS and Rosemount have dedicated small gas chromatographs. It is specifically designed for the natural gas industry, and its application is also well-established. It can measure C1-C6, and even C7, C8, C9. It can also determine calorific value, density, and Wobbe index, making it suitable for natural gas metering.