Case Study
Case Study
Case Study
Case Study
Case Study
4-Parallel Fixed-Bed Bitumen Hydrotreater
4-Parallel Fixed-Bed Bitumen Hydrotreater
The task
Designing a unit which is able of high-pressure dosing of liquid bitumen at extremely low flowrates resulting from the low LHSV’s at which these catalsts operate.
The ILS solution
The unit was designed to not be susceptible to problems such as ammonium bisulphite formation and blockage in downstream tubing.
The use of large, convection ovens instead of more traditional heat-tracing and insulation combined with a unique quick closure system makes the unit very user friendly.
High-temperature, high pressure diaphragm pumps in combination with high-temperature coriolis flow meters have been selected to dose different feedstocks independently of their properties. Optimized Reactors in multi-zone split shell ovens give enough space for larger catalyst amounts while ensuring plug-flow conditions, avoiding wall effects and axial dispersion. The pressure control and gas/liquid separation and striping section was designed to handle huge variations in pressures and flows by using novel 2-phase membrane pressure controllers. An integrated online GC, as well as exit gas flow meters and automatic liquid product recovery and sampling has been used to provide a tight mass balance.
The result
Both hot and cold liquid fractions are continuously collected and an on-line GC provides continuous analysis of all vapor-products formed as well as calculating the volume change during reaction via measurement of an additional internal standard.
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