BHR Biofuels Ltd

Process Intensification Experts

What makes our processors better than the competition?

The design process used to create our systems has draw on 300 man years of measured process data and resulted in targeted designs with mass-transfer rates, heat transfer rates and residence time matched to mixing energy dissipation rates, kinetics and reaction time. The result is a compact system that has flexible operation with highly efficient processing and robust construction.
Stacks Image 92
Stacks Image 107
Why is mixing important?

The transesterification is a mass-transfer limited reaction with the reaction time being very dependant on finding the methanol once the glycerine has started to increase the viscosity of the polar phase. Hence the tail of the reaction is very long and results in batch reactors having to remove the viscous glycerine/methanol mixture and add a second methanol addition (with low viscosity) to finish the process. Our reactors focus the intensive mixing towards the tail end on the process to be driven to completion with a single Methanol/catalyst addition in less than 60 seconds.
Can the process be intensified further?

Simply put - Yes it can. The kinetics are fast and so putting more mixing energy can make a faster reaction. However, the law of diminishing returns applies and also very intensive mixing systems are often expensive and loose energy to friction losses and become less efficient. Our systems represent a very balanced approach and have simplicity and robustness on their side.
Stacks Image 111
Stacks Image 115

Chemistry, physics, rheology, materials science, accountancy, engineering and inspirational thought all go into making the best reactor.
Residence time distribution, energy dissipation rates, flow regime, energy and mass balance - all words you should hear and understand when talking about and comparing reactor systems.