Equipment and Facilities

The Walton Group laboratories in Bunger-Henry are well-equipped for conducting organic, inorganic, and solid state chemistry. Facilities available for synthesizing metal-organic frameworks, metal oxides, and a variety of porous materials include synthesis ovens, vacuum ovens, Soxhlet extractors, and Teflon lined reactors. The labs are equipped with typical characterization tools including BET measurement and thermal gravimetric analyzer. Specialized adsorption equipment for measuring pure-component and multi-component systems (including water) are also part of the group instrumentation. Click the instruments below for more specific information.

IGA-1

Single Gas Sorption Analyser (IGA-001)

The IGA design integrates precise computer-control and measurement of mass change, pressure and temperature to enable fully automatic and reproducible determination of gas sorption-desorption isotherms and isobars in diverse operating conditions.

A range of sample environment options are available to allow operation at temperatures from -196 to 1000 °C and at pressures ranging from ultra-high vacuum (UHV) to 20 bar. The IGA-001 has been used in a diverse range of applications areas, including gas sorption on carbons and zeolites, gas interaction with ionic liquids and for the characterization of hydrogen storage materials.

The IGA method involves continuously monitoring and analyzing the weight data following a controlled change in gas pressure. This real time analysis both determines the kinetic parameters and predicts the exact point of equilibrium uptake. The equilibrium points are collected and plotted as an isotherm, giving a consistent reproducible analysis method whilst making optimal use of instrument time.

Typical sorptives:
• Unreactive low temperature probe gases (e.g. nitrogen, argon, carbon dioxide)
• Reactive species (e.g. hydrogen, oxygen, carbon monoxide, methane)

Quadrasorb BET

High-performance Surface Area Analyzer and Pore Size Analyzer with four independent analysis stations to collect reliable and accurate BET surface area results from a surface area with full adsorption and desorption capability.

IGA-3

Multicomponent Analyser (IGA-003)

The IGA-003 is a gravimetric analyser specifically designed for dynamic multi-component gas sorption analysis (like water, ethanol adsorption). The multiple inlet mass flow controller system allows multi-component experiments in both pressure control and flow control modes.

The IGA design integrates precise computer-control and measurement of mass change, pressure and temperature to enable fully automatic and reproducible determination of gas sorption-desorption isotherms and isobars in diverse operating conditions. A range of sample environment options are available to allow operation at temperatures from -196 to 1000 °C and at pressures ranging from ultra-high vacuum to 20 bar. A close-coupled mass spectrometer option allows the performance of product desorption and standard TG/MS experiments.

 

TGA/MS-DSC

STA 449 F1 Jupiter with QMS 403 C Netzsch is a very powerful ThermoGravimetric Analysis instrument. It allows:

• thermal stability, decomposition behavior, composition, phase transitions, melting processes to be analyzed comprehensively and quickly
• easily to use top-loading system with exceptionally precise balance resolution (25 ng resolution at a weighing range of 5g) and highest long-term stability
• interchangeable sensors for DSC measurements with highest sensitivity and best reproducibility for reaction/transition temperatures and enthalpies as well as for measurements of specific heat
• temperature-modulated DSC (TM-DSC)

In addition, the QMS 403 Aëolos® quadrupole Mass Spectrometer is a compact mass spectrometer with a heated capillary inlet system for routine analysis of gases and, in particular, volatile decomposition products of thermal analysis. This system has been optimized for coupling to differential scanning calorimeters, dilatometers and thermogravimetric analyzers by:

• increasing the temperature of the entire gas transfer system to 300°C
• an improved single-stage inlet system with a low-reaction fused silica capillary and ultrasonic expansion in the ion source

 

Pressure Decay

Single Component Gas Adsorption Apparatus.

Equilibrium adsorption analysis over a pressure range of 0-6 bar at mild temperatures

 

Gas Chromatograph GC-2010 Plus

The GC-2010 Plus is a powerful high-performance tool, which enables reliable, high-precision trace analysis with high repeatability, utilizing detectors such as FID and FPD that feature best-in-class sensitivity. In addition, rapid oven cooling and backflush technology shorten analysis time greatly for significant improvements in productivity.

Ovens and Reactors

Isotemp Vacuum Ovens

Ideal for general vacuum drying and heating applications. Designed to operate with reduced pressures and/or inert atmospheres, oven is equipped with separate vacuum and gas ports, each with its own control valve.

Isotemp Premium Ovens

Ideal for general heating applications. Easy programmable temperature and time of synthesis.

Linberg Blue M Thermo Oven

Blue M Lab ovens are designed for laboratory applications such as moisture drying, curing, baking, aging and general testing. Long life tube-style heating elements last over twice as long as open coil or wire elements

• superior heat ramp-up and recovery

Extra thick insulation allows

• Cooler outer skin temperature
• Superior temperature uniformity
• Greener operation costs less to operate

Horizontal Airflow Design

• provides more efficient and consistent heating
• protects heating elements from contamination and spills.

 
 

Crystallography

Single-crystal X-ray diffraction studies are carried out at Emory University's X-ray Crystallographic Center. PANalytical X-ray diffractometer and reflectometer is available in the Nair Group for powder X-ray studies. For crystallographic work, a group license is available for Crystalmaker and site license for the Cambridge Structural Database.

Computational Tools

High performance computing platforms are available in the School of Chemical & Biomolecular Engineering for performing molecular modeling studies. Monte Carlo and molecular dynamics simulations are carried out using the Snurr Group's MUSIC simulation code. For crystallographic work, a group license is available for Crystalmaker and site license for the Cambridge Structural Database.