Analysis of permanent gases and light hydrocarbons with the PlasmaDetek
LD12-2 Permanent gas and light HC
อุปกรณ์สำหรับวัด permanent gas และ light hydrocarbon
ไม่ว่าจะเป็น ไฮโดรเจน ไนโตรเจน หรือ คาร์บอนนอกไซด์ที่ยังคงสภาวะเป็นแก๊สอย่างไม่มีการเปลี่ยนแปลง หากเราไม่ตั้งใจปรับสภาพมัน หรือแม้กระทั่ง ไฮโดรคาร์บอนโมเลกุลเบาอย่าง เมเทน อีเทน โพรเพน ก็ตาม บทความนี้อธิบายถึงการ ใช้ Plasma ในการวัดแก๊สเหล่านี้ได้อย่างง่ายๆ มาดูกันค่ะ
The PlamaDetek is ideal to measure permanent gases and light hydrocarbons in different matrices. Only one detector system is needed to accomplish this task. Such measurement is required in many different applications field: industrial, petrochemical, energy, environmental, etc. The sensitivity, the stability, the ease of start-up and installation make this system very attractive for any users.
PLASMADETEK CONFIGURATION
The PlasmaDetek is configured with two outputs signal to be able to detect all components. Both argon or helium carrier gas can be used.
Output 1 : H2, C1 to C4
Output 2 : O2, N2, CO, CO 2
No need of fuel, air, dopping gas, methanizer or other devices with the system. This is a stand-alone detector system that requires only carrier gas to make the measurement of each compound.
CHROMATOGRAPHY CONFIGURATION
To make the measurement of all components described above, figure 2 describes an easy configuration. Only one 10 ports injection valve and one selection valve are used. One RT Molecular Sieve 5A 30m x 0.53mm (column 2) separates H2, O2, N2, CH4, CO before being measured by the detector. The other column, a RT Alumina Bond 30m x 0.53mm x 10mm(column 1), does the same for the CO 2 and C1 to C4.
• 1 x 10 ports injection valve
• 1 x 6 ports valve for channel selection
• 1 x RT Alumina Bond 30m x 0.53mm x 10mm (column 1)
• 1 x RT Molecular Sieve 5A 30m x 0.53mm (column 2)
• Argon or helium carrier
• Carrier Flow : 4 cc/min
• Make-up : 60 cc/min
• Detector : PlasmaDetek two outputs
Figure 3 : shows the chromatogram obtained from this configuration. The chromatograph uses output 1 to measure H2 and the HC’s and output 2 for the others.
Figure 4 shows the performance of the PlasmaDetek for such components obtained with the configuration described above. Those results and performances depend on the chromatographic system and conditions of operation.
CONCLUSIONWith the PlasmaDetek, we can measure permanent gases and C1-C4 with only one detector. This is a very cost effective solution in terms of gas supply, plumbing configuration and time consuming. The performance is indisputable. Application in ppb is now easy to make with such configuration. Selectivity on some impurities can also be configured in the PlasmaDetek to make Chromatography easier when working on different background or focus on some impurities. Heavier hydrocarbons can also be measured. Please contact LDetek for more information.
