HEL Simular Automated Reaction Calorimeter

Overview

The HEL Simular Automated Reaction Calorimeter is a modular, research-grade reaction calorimetry platform engineered for rigorous thermal safety assessment and kinetic/thermodynamic characterization of chemical processes under ambient pressure and controlled temperature conditions. Based on the fundamental principle of power compensation calorimetry—where electrical power is dynamically adjusted to maintain isothermal conditions at the reactor wall—the Simular delivers calibration-free, high-fidelity heat flow data without reliance on system-specific heat capacity calibrations. Its dual-mode architecture supports both power compensation and classical heat flow calorimetry, enabling direct comparison across methodologies and robust validation of thermal profiles. Designed as a core component of HEL’s Process Safety & Chemical Synthesis portfolio, the Simular integrates seamlessly with process development workflows—from early-stage screening in glass vessels to late-stage scale-up studies in corrosion-resistant metal reactors (316 SS or Hastelloy C-276). The system operates across a wide thermal envelope (−30 °C to 225 °C) and pressure range (vacuum to 100 bar), accommodating exothermic, endothermic, autocatalytic, and semi-batch reactions while maintaining traceable, GLP-compliant data integrity.

Key Features

• Fully automated operation with programmable reaction sequences, real-time feedback control loops, and user-defined experimental protocols—from simple addition profiles to multi-step temperature-ramped campaigns.
• Dual-reactor configuration option: enables parallel or sequential experiments using dissimilar materials (e.g., glass for visibility and metal for high-pressure compatibility), reducing turnaround time and enhancing reproducibility across material classes.
• Calibration-free power compensation calorimetry: eliminates drift-related uncertainty and routine recalibration, delivering absolute heat flow accuracy traceable to SI electrical standards.
• High-resolution thermal sensing: 0.2 mK temperature resolution and ±0.1 K absolute precision support detection of subtle thermal events, including induction periods, secondary decomposition onset, and low-energy side reactions.
• Multi-sensor fusion architecture: native integration of pressure, pH, turbidity, and spectroscopic probes (FTIR, Raman, FBRM) via synchronized timestamped acquisition—enabling correlative analysis of thermal, compositional, and morphological evolution.
• Robust mechanical design: thermally isolated jacketed reactor housing with active cooling/heating capacity up to ±750 J/K, ensuring stable thermal management during rapid exotherms or prolonged isothermal holds.

Sample Compatibility & Compliance

The Simular accommodates heterogeneous, multiphase, and highly viscous systems across standard reactor volumes (500 mL, 1 L, 2 L) and material options optimized for chemical compatibility and operational safety. Glass reactors provide optical access for visual monitoring and in-situ spectroscopy; 316 stainless steel offers broad resistance to oxidizing and mildly corrosive media; Hastelloy C-276 extends capability to halide-containing, strongly acidic, or high-temperature environments. All configurations comply with ISO 11358 (polymer thermal analysis), ASTM E698 (kinetic evaluation of decomposition), and ICH Q5C (stability testing guidelines). Data acquisition meets FDA 21 CFR Part 11 requirements through audit-trail-enabled software with electronic signatures, role-based access control, and immutable raw-data archiving—ensuring suitability for GMP-regulated process validation and regulatory submissions.

Software & Data Management

HEL’s Reaction Manager™ software provides an intuitive, context-aware interface supporting both novice and expert users. It features drag-and-drop experiment sequencing, live overlay of thermal and ancillary sensor streams, automated peak detection and integration, and built-in calculation modules for adiabatic temperature rise (ΔT_ad), time-to-maximum-rate (TMR_ad), and emergency cooling duty estimation. All raw data—including timestamps, setpoints, PID parameters, and hardware status logs—are stored in vendor-neutral HDF5 format with embedded metadata. Export options include CSV, Excel, and PDF reports compliant with internal SOPs and external regulatory templates (e.g., CCPS, EFSA, MHRA). Batch-level metadata tagging, version-controlled method libraries, and API-driven integration with LIMS and MES platforms facilitate enterprise-scale data governance.

Applications

• Process safety evaluation: determination of thermal runaway thresholds, MTSR (Maximum Temperature of Synthesis Reaction), and adiabatic decomposition energy for RC1-type hazard assessments.
• Reaction kinetics modeling: extraction of activation energies, enthalpies of reaction, and rate constants from dynamic and isothermal calorimetric traces.
• Scale-up support: correlation of lab-scale heat transfer coefficients with pilot-plant geometry to validate cooling capacity margins and identify potential hot spots.
• Catalyst screening: quantification of enthalpic efficiency and selectivity trade-offs across catalyst loadings and ligand variations.
• Crystallization process optimization: monitoring of dissolution enthalpy, nucleation onset, and polymorphic transition heats under controlled supersaturation.
• API manufacturing: thermal profiling of hydrogenations, nitrations, and Grignard additions to establish safe operating envelopes per ICH Q9 principles.

FAQ

What distinguishes power compensation calorimetry from heat flow calorimetry in the Simular?
Power compensation measures the electrical power required to maintain reactor wall temperature, yielding direct, calibration-free heat flow. Heat flow mode relies on temperature differentials across a known thermal resistance, requiring periodic system characterization.
Can the Simular be used for high-pressure reactions?
Yes—when equipped with 316 stainless steel or Hastelloy C-276 reactors, the system supports pressures up to 100 bar, with integrated pressure transducers and safety interlocks compliant with PED 2014/68/EU.
Is remote monitoring and control supported?
The Reaction Manager™ software includes secure web-based access (HTTPS/TLS) for real-time dashboard viewing, alarm notifications, and limited parameter adjustment—subject to configured user permissions and network security policies.
How does the dual-reactor option improve workflow efficiency?
It allows concurrent preparation and measurement cycles: while one reactor undergoes cleaning or setup, the other runs an experiment—reducing idle time by up to 40% in high-throughput development labs.
Does the system support compliance with ISO/IEC 17025 for accredited testing labs?
Yes—through documented uncertainty budgets, traceable sensor calibration certificates (NIST-traceable), and full audit trail functionality, the Simular meets technical requirements for ISO/IEC 17025 accreditation when operated within validated SOPs.