Zhonghuipu GCD-2000 Alkaline Electrolysis Hydrogen Generator

Overview

The Zhonghuipu GCD-2000 is a benchtop alkaline electrolysis hydrogen generator engineered for continuous, on-demand production of high-purity hydrogen gas in analytical and research laboratory environments. It operates on the principle of water electrolysis in an aqueous potassium hydroxide (KOH) solution, where direct current drives the decomposition of deionized water into hydrogen and oxygen at nickel-based electrodes. The evolved hydrogen is subjected to multi-stage purification—including membrane-based moisture separation, triple-bed adsorption filtration (comprising activated carbon, molecular sieve, and trace-oxygen scavenger), and catalytic recombination of residual oxygen—ensuring consistent delivery of 99.999% pure H₂. Designed for integration with gas chromatography (GC), fuel cell testing, hydrogenation reactors, and inert atmosphere purging systems, the GCD-2000 eliminates dependency on high-pressure cylinder logistics while maintaining stable pressure and flow across variable demand profiles.

Key Features

• Fully automated operation with closed-loop pressure and flow control: maintains setpoint output pressure (0–0.4 MPa) and dynamically adjusts hydrogen generation rate (0–2000 mL/min) in real time based on downstream consumption.
• Integrated low-humidity gas conditioning: proprietary hydrophobic membrane separator reduces dew point prior to adsorption stages; no external dryer or periodic desiccant replacement required.
• Triple-filtration architecture: three replaceable cartridges—activated carbon (for organic impurities), 4Å molecular sieve (for residual moisture), and pre-packed oxygen scavenger (palladium-doped copper oxide, non-regenerable, zero activation needed)—ensure long-term purity stability without operator intervention.
• Fail-safe engineering: built-in anti-backflow alkaline barrier prevents KOH solution migration into gas lines; overpressure relief valve, thermal cutoff, and electrolyte level sensor provide redundant protection per IEC 61010-1 safety requirements.
• Energy-efficient design: optimized electrode geometry and thermal management yield stable 1 kW power draw across full load range, with standby power < 5 W during idle periods.

Sample Compatibility & Compliance

The GCD-2000 delivers hydrogen suitable for GC carrier gas applications compliant with ASTM D7217 and ISO 8573-1 Class 1 compressed air equivalency for gaseous contaminants (total hydrocarbons < 0.1 ppmv, H₂O < 1 ppmv, O₂ < 0.1 ppmv). Its output meets USP specifications for hydrogen used in pharmaceutical process validation and satisfies GLP-compliant instrument qualification protocols when paired with documented IQ/OQ/PQ procedures. As a CE-marked device (per 2014/35/EU Low Voltage Directive and 2014/30/EU EMC Directive), it supports audit-ready operation in regulated QC labs operating under FDA 21 CFR Part 11–enabled data governance frameworks.

Software & Data Management

While the GCD-2000 operates via embedded microcontroller without external PC dependency, its digital front panel logs cumulative runtime, total gas output (L), and fault event history (e.g., low electrolyte, overtemperature, pressure deviation >0.001 MPa). All operational parameters are timestamped and exportable via USB-C interface in CSV format for traceability. Optional RS-485 Modbus RTU protocol enables integration into centralized lab infrastructure monitoring systems (e.g., LabVantage, Thermo Fisher SampleManager), supporting automated calibration logging and preventive maintenance scheduling aligned with ISO/IEC 17025 Clause 6.4.2.

Applications

• Carrier and fuel gas supply for flame ionization detectors (FID) and thermal conductivity detectors (TCD) in GC systems.
• Reducing atmosphere generation for X-ray diffraction (XRD) sample chambers and catalyst characterization reactors.
• Hydrogen feedstock for proton exchange membrane (PEM) fuel cell performance testing under controlled stoichiometry.
• Inert blanket gas for glovebox purging and moisture-sensitive synthesis workflows requiring <1 ppmv O₂/H₂O.
• Calibration gas standard preparation in metrology laboratories adhering to ISO/IEC 17025 traceability chains.

FAQ

What electrolyte is used, and how often does it require replenishment?
Aqueous 25–30% w/w potassium hydroxide (KOH) solution is used; typical replenishment interval is every 6–12 months depending on daily usage volume and ambient humidity—electrolyte level is monitored continuously and indicated via LED alert.
Is the hydrogen output compatible with GC-FID without additional purification?
Yes; the integrated triple-filtration system ensures compliance with ASTM D7217 Grade 5 purity requirements for FID operation—no external purifier is necessary under normal laboratory conditions.
Can the unit be operated unattended overnight or over weekends?
Yes; all safety interlocks remain active during extended operation, and the controller maintains pressure setpoint within ±0.001 MPa tolerance without drift, supporting 24/7 deployment in validated environments.
Does the generator require cooling water or forced ventilation?
No; passive convection cooling suffices within ambient temperatures up to 40 °C; minimum clearance of 10 cm around rear and top vents is recommended for thermal dissipation.
How is regulatory compliance verified during installation qualification (IQ)?
Factory calibration certificates (traceable to NIST standards), electrical safety test reports (IEC 61010-1), and material declarations (RoHS/REACH) are supplied with each unit; optional third-party IQ documentation package available upon request.