PTQ Q4 2023 Issue

Closed-loop ammonia sampling systems featuring transparent pipes and collection vessels are preferred, as operators can monitor the sampling process to ensure proper functioning and sample collection (see Figure 4 ). In addition, when such systems are semi-automated, opera- tors are better able to ensure sample collection accuracy. Both features are helpful, as sampling results can vary if the process is not done consistently. For example, manual processes rely on the skills and judgment of the operator to maintain consistent rates of heating and to control the rate of evaporation, which can cause inaccuracies. In a semi-automated system, a single handle can control valve operation for preset and customisable ‘Off’, ‘Purge’, ‘Chill’, and ‘Sample’ functions, minimising the opportunity for sampling errors (see Figure 5 ). As an example, during the ‘Chill’ setting, an automated system would pre-chill a residue tube (using the cold ammonia from the process itself) to prevent aggressive ammonia boiling that could otherwise occur and hinder the sample collection process. The heating cycle is then highly controlled for a consist- ent rate of sample evaporation. Via the transparent glass fixtures, operators are then able to verify the sample fill - ing process and ensure consistent sample sizes for test- ing. Such capabilities allow for faster sampling captures and analyses – unlike the potential eight-hour wait manual sampling procedures often require until a measurement can be taken. Transitioning the traditional manual ammonia sampling process to a semi-automated closed-loop process offers

the potential for facilities to minimise hazardous exposures to operators and the environment, incorporate greater con- sistency into sampling operations, and expedite the gath- ering of results. All images courtesy of Swagelok Company. Matt Dixon is Application Commercialisation Manager for Swagelok Company. Figure 5 In a semi-automated, closed-loop ammonia sampling system, operators are able to rotate a single handwheel that controls four valves to eliminate human error when moving through the ‘Off’, ‘Purge’, ‘Chill’, and ‘Sample’ functions

Chemistry matters

Sustainability

Digital transformation

Solve complex process challenges with deep chemistry insights

Process Flow Simulation

Mineral scale management

Thermophysical Modeling

Aqueous corrosion management

Desktop and cloud-based software for process modeling and intelligent simulation insights OLI Systems offers comprehensive solutions for process modeling that deliver intelligent simulation insights to enhance operations efficiency, reliability, sustainability, and engineering productivity. The OLI software platform draws on a vast chemistry property database and thermodynamic models to predict chemistry behavior, mineral scaling, and corrosion for thousands of industrial applications in oil & gas, chemicals, and related industries. OLI’s application engineering teams bring deep industry expertise in addressing complex chemistry challenges. OLI’s scientists collaborate with clients to accelerate modeling of next generation applications. OLI’s operations excellence teams deploy OLI technologies to digitally transform chemistry-centric processes.

www.olisystems.com

CHEMISTRY MATTERS | ACCELERATING SUSTAINABILITY

PTQ Q4 2023