Zhengxin Instruments EY-Series Electrode-Equipped High-Pressure Reaction Vessel (Model EY-100ML)

Overview

The Zhengxin Instruments EY-Series Electrode-Equipped High-Pressure Reaction Vessel (Model EY-100ML) is an engineered platform for controlled high-pressure, high-temperature electrochemical synthesis and catalytic reaction studies in research laboratories. Built on the principles of sealed-system thermodynamics and electrochemical interface stability, the EY-100ML integrates a robust pressure containment architecture with precision electrochemical instrumentation access. Its core design adheres to fundamental safety requirements for pressurized chemical systems—featuring monolithic forged stainless steel construction, dual-stage sealing (elastomeric gasket plus metal-to-metal backup), and ASME BPVC Section VIII-inspired pressure boundary integrity. The vessel operates within a verified pressure envelope of –0.1 MPa (vacuum) to 20 MPa (gauge), with thermal stability up to 350 °C, enabling kinetic investigations of hydrogenation, CO₂ reduction, electrosynthesis, and heterogeneous catalysis under industrially relevant conditions.

Key Features

• Monolithic forged stainless steel body (standard 304 or optional 316L/310S/Hastelloy C-276) machined from solid bar stock—eliminating weld seams and ensuring structural homogeneity under cyclic thermal and pressure loading.
• Dual-seal configuration: primary fluoropolymer O-ring (FKM/Viton) backed by secondary metal C-ring seal at the main flange interface—validated for leak rates <1×10⁻⁹ mbar·L/s per ISO 15848-1.
• Sapphire optical viewport (≥25 mm clear aperture, AR-coated) rated for full operating pressure and temperature; enables in situ Raman, UV-Vis absorption, or video monitoring of reaction morphology without compromising containment integrity.
• Integrated electrode feedthroughs with hermetic ceramic-to-metal seals (Al₂O₃ or Macor insulators); supports Pt working electrodes, Ag/AgCl reference electrodes, and auxiliary counter electrodes—all with PTFE-lined internal holders to prevent parasitic side reactions.
• Modular embedded heating system with rapid thermal response (<5 °C/min ramp rate) and PID-controlled dual-channel regulation—prevents overshoot during exothermic electrochemical events and maintains ±1.5 °C uniformity across the reaction zone.
• Magnetic coupling stirrer driven by a SmCo permanent-magnet DC brushless motor (rated IP54, 10,000+ hr service life); speed controllable from 0–1000 rpm with programmable direction reversal—ideal for mass-transfer-limited electrocatalytic reactions.

Sample Compatibility & Compliance

The EY-100ML accommodates diverse sample chemistries including aqueous electrolytes, ionic liquids, supercritical CO₂, organic solvents (e.g., DMF, THF, acetonitrile), and corrosive media (e.g., HF-containing etchants, concentrated H₂SO₄). All wetted components comply with NACE MR0175/ISO 15156 for sour service when specified with 316L or higher alloys. Pressure and temperature sensors meet IEC 61508 SIL2 functional safety requirements. The system is compatible with GLP documentation workflows and supports audit-ready data logging when paired with optional compliant software modules. Design documentation includes traceable material certifications (EN 10204 3.1), hydrostatic test reports (1.5× MAWP), and non-destructive examination records (PT/VT).

Software & Data Management

While the base unit operates via front-panel LCD with real-time display of temperature, pressure, stirring speed, and elapsed time, optional PC connectivity (RS485/Modbus RTU or USB-C) enables integration into centralized lab data acquisition systems. Compatible with third-party SCADA platforms (e.g., LabVIEW, MATLAB Data Acquisition Toolbox) and LIMS interfaces, the controller supports timestamped CSV export of all process variables at user-defined intervals (1–60 s). For regulated environments, optional firmware upgrade provides 21 CFR Part 11–compliant electronic signatures, audit trail logging (including parameter change history and operator ID), and role-based access control—fully aligned with FDA and EMA expectations for electrochemical process validation.

Applications

• Electrocatalytic CO₂ reduction under elevated pressure to enhance Faradaic efficiency and product selectivity toward C₂+ hydrocarbons.
• In situ XRD/Raman studies of electrode surface evolution during lithium-sulfur battery cycling under realistic pressure-temperature conditions.
• Heterogeneous hydrogenation of aromatic nitro compounds using supported Pd catalysts—monitoring kinetics via online GC sampling through dedicated septum ports.
• Hydrothermal synthesis of metal–organic frameworks (MOFs) with simultaneous electrochemical doping to tune porosity and redox activity.
• Corrosion testing of candidate alloys in simulated geothermal brines (pH 2–12, Cl⁻ ≤ 100,000 ppm) at 200 °C/15 MPa.

FAQ

What materials are available for the reactor body beyond standard 304 stainless steel?
Optional vessel bodies include ASTM A240 316L, 310S, UNS N08904 (904L), UNS N10276 (Hastelloy C-276), and Grade 2 titanium—each supplied with full mill test reports.
Can the EY-100ML be configured for continuous gas flow operation?
Yes—custom variants support dual-gas inlet/outlet ports with mass flow controllers (MFCs), back-pressure regulators (BPRs), and inline moisture/oxygen analyzers for steady-state electrochemical gas-phase reactions.
Is the sapphire viewport suitable for UV spectroscopy down to 190 nm?
Standard AR-coated sapphire transmits >85% from 200–5000 nm; UV-grade fused silica windows are available as an alternative for sub-200 nm applications.
How is calibration traceability maintained for temperature and pressure sensors?
All factory-installed sensors ship with NIST-traceable calibration certificates (valid for 12 months); field recalibration kits and accredited third-party service options are available upon request.
Does the system support automated reaction quenching or sampling under pressure?
Yes—optional high-pressure liquid sampling valves (Swagelok SS-4HPV series) and rapid-cooling jackets (liquid N₂ or chilled glycol) can be integrated with programmable logic control sequences.