Process gas chromatographs & Online gas chromatography

Process Gas Chromatographs

Products/ Process Gas Chromatographs

The HPGC-1000 Process Gas Chromatograph

The HPGC-1000 Online Process Gas Chromatograph is designed to separate and analyze virtually all gas mixtures or liquid mixtures that can be vaporized. Its specially engineered hardware and software meet stringent requirements for measurement repeatability and long-term stable operation. Featuring a flexible column oven design and modular functional components, this system enables sophisticated analytical applications.

As an industrial-grade process chromatograph, it also complies with environmental monitoring requirements through its precision measurement capabilities and continuous operational reliability.

How Does Process Gas Chromatograph Ensure Precise Component Analysis?

Modern process gas chromatographs deliver reliable multi-component analysis for industrial applications. These instruments inject controlled gas or liquid samples into temperature-stabilized dosing tubes, maintaining consistent flow rates. Carrier gas then transfers these samples into chromatographic columns, where separation occurs through differential interaction with packing materials.

What Makes Process Gas Chromatographs Ideal for Continuous Industrial Monitoring?

Online gas chromatography systems operate cyclically and intermittently. As a part of it, process gas chromatographs enable automated sampling without process interruption. Advanced models like the HPGC-1000 utilize three-phase mechanisms:

1. Sample injection with pressure-balanced dosing valves.

2. Column separation through adsorption/desorption dynamics.

3. Detection via specialized sensors.

Which Detector Technologies Optimize Process Gas Chromatograph Performance?

The HPGC-1000 process gas chromatograph supports three detector configurations for comprehensive analysis:
– Thermal Conductivity Detectors (TCD) measure non-corrosive components like hydrogen and nitrogen
– Flame Ionization Detectors (FID) excel in hydrocarbon quantification
– Flame Photometric Detectors (FPD) specifically target sulfur compounds

The Flame Ionization Detector (FID

Flame Photometric Detectors (FPDs)

Thermal Conductivity Detectors (TCDs)

How Does the Flame Ionization Detector Work in Process Gas Chromatograph Systems?

The flame ionization detector (FID) delivers exceptional sensitivity for organic compound analysis in online gas chromatography. This destructive, mass-sensitive detector uses hydrogen and air combustion to generate a stable flame. As the carrier gas transports sample components into the flame, organic molecules undergo high-temperature chemical ionization. This process creates ion currents *millions of times stronger* than the baseline flow.

A high-voltage electric field directs charged particles toward respective electrodes, generating measurable current. Advanced amplifiers then convert this signal into quantifiable data, enabling precise organic compound quantification. Modern process gas chromatograph systems leverage FID’s *10^-12 A to 10^-8 A detection range* for hydrocarbon analysis in petrochemical and environmental applications.

Why Choose Thermal Conductivity Detectors for Permanent Gas Analysis?

Thermal conductivity detectors (TCDs) remain a cornerstone of gas chromatography due to their universal response and rugged design. These detectors compare gas thermal conductivity differences between pure carrier gas and sample mixtures. A heated tungsten filament forms a Wheatstone bridge circuit—when sample components alter thermal conductivity, filament resistance shifts unbalance the bridge, generating measurable signals.

Key factors like bridge current (100-200 mA), carrier gas type (helium/hydrogen preferred), and detector temperature critically influence sensitivity. While less sensitive than modern alternatives, TCDs excel in detecting inorganic gases and permanent gases like H2, CO2, and O2. Their simplicity makes them ideal for industrial process gas chromatograph monitoring.

Can Flame Photometric Detectors Accurately Trace Sulfur and Phosphorus Compounds?

Flame photometric detectors (FPDs) provide unmatched selectivity for sulfur (S) and phosphorus (P) compounds in online gas chromatography. When these compounds burn in a hydrogen-rich flame, S*₂ molecules emit blue-violet light (394 nm), while HPO* fragments produce green emissions (526 nm). Optical filters isolate these wavelengths before photomultiplier tubes convert light into electrical signals.

With detection limits reaching *10^-12 g/s for phosphorus* and *10^-11 g/s for sulfur*, FPDs effectively suppress hydrocarbon interference (selectivity ratio: 10⁴:1). This makes them indispensable for environmental monitoring of pesticides, natural gas odorants, and industrial pollutants. For process gas chromatograph systems analyzing refinery gases or air quality, FPDs ensure reliable trace-level compliance reporting.

What Makes PDHID Ideal for Ultra-Trace Analysis in the HPGC-1000 Process gas chromatoraph?

The pulsed discharge helium ionization detector (PDHID) achieves ‘ppb-level sensitivity’ across virtually all organic/inorganic compounds, making it unparalleled for high-purity gas analysis. Unlike radioactive detectors, PDHID uses pulsed electrical discharges to create metastable helium atoms (He*). These excited particles ionize sample molecules via the Penning effect, generating measurable currents. Critical operational parameters include:

– Pulse intervals (200-300 μs) balancing sensitivity and thermal stability

– Bias voltage (-40V to -60V) optimizing signal-to-noise ratios

– Helium purge flow (6.8-68 mL/min) minimizing peak tailing

With a 113 μL cell volume, PDHID maintains resolution even for 1-second peaks. Its non-radioactive design and consistent performance in online gas chromatography systems make it preferred for semiconductor-grade gas monitoring and environmental trace analysis.

Technical Parameters

Model	HPGC-1000	Measurement Object	Gases or vaporizable liquids	Protocol	Modbus RTU
Ambient Temperature	-10°C to 40°C	Measurement Range	ppb to 100% (depending on the analyte)	HMI	10.4-inch color touchscreen
Detector Types	– TCD – FID – FPD – PDHID	Multi-Detector Capability	Supports simultaneous installation of 2 FIDs or 4 TCDs	Power Supply	– 220 VAC ±10% – 50 Hz ±5%
Lower Detection Limits	– FID: 15 ppb (CH₄) – TCD: 100 ppm (CH₄ in H₂) – FPD: 0.1 ppm (H₂S) – PDHID: 10 ppb (CH₄)	Zero Drift	– TCD ≤1% (1 hour) – FID ≤1% (1 hour) – FPD ≤1% (1 hour) – PDHID ≤1% (1 hour)	Dimensions	– N-type: 680 mm (W) × 407 mm (D) × 955 mm (H) – L-type: 770 mm (W) × 407 mm (D) × 1159 mm (H)
Repeatability Error	≤±1% F.S. (varies with application)	Heating Method	PID-controlled air bath heating	Weight	– Explosion-proof: ~100 kg – Non-explosion-proof: ~84 kg
Oven Temperature Range	Ambient +10°C to 180°C	Control Accuracy	±0.05°C	Standard I/O (Expandable as needed)	– Inputs: 8 analog inputs (AI); 8 digital inputs (DI) – Outputs: 12 analog outputs (AO); 8 digital outputs (DO)
Thermostatic Chamber Volume	40L	Sampling Valves	– Diaphragm valve – rotary valve – liquid sample injection valve	Communication Interfaces	– RS-232 – RS-485 – Ethernet
Number of Installable Valves	Maximum 10 valves	Column Types	– Packed column – micro-packed column – capillary column	Applications	– Chemical – natural gas – petroleum – metallurgy – industrial gas industries
Carrier Gas Pressure	0.1–0.5 MPa	Accessories	Methane conversion furnace/hydrocarbon remover	Carrier Gas & Consumption	– Flow rate: 30–300 ml/min – Purity: 99.999% N₂/He (compatible with purifiers) – Control Accuracy: ±0.001 psi
Instrument Air	– Oil-free, dry – 0.5 MPa – Flow rate: 100 L/min	Explosion-Proof Rating	Ex db eb mb pxb II C T4 Gb	Auxiliary Gases	– Combustion Support: 300–450 ml/min (Zero-grade air) – Fuel Gas: 25–45 ml/min (99.999% H₂) – Drive Gas: N₂ or Air