PhD Towards a circular sulphur economy

PhD Towards a circular sulphur economy


PhD In the direction of a round sulphur financial system

Analysis challenges – Within the organic gasoline desulphurisation course of, gasoline, liquid, and strong phases co-exist. As an illustration, within the absorber, a gasoline part (bitter gasoline) is contacted with a liquid part (haloalkaline answer), which comprises strong phases (biosulphur particles and microorganisms). Whereas the microbial group and its related kinetics have been extensively studied, various phenomena within the organic gasoline desulphurisation course of are usually not but totally understood. The not too long ago found electron shuttling capability of sulfide oxidizing micro organism is one in all these. As a consequence of these phenomena, dissolved sulfide is faraway from course of answer, with out consuming oxygen. Different not totally understood phenomena are, for example, the enhancement of H2S absorption by micro organism and the sulfur crystals formation. All of those processes are hypothesized to happen on the interfaces of the organic desulfurization course of. Therefore, analysis is required to analyze the interplays between kinetics of chemical and organic reactions and switch charges on the interfaces.

Goals and methodology – This mission goals to grasp the interplays between the kinetics of the organic reactions, the kinetics of the chemical reactions, and the switch charges across the varied gas-liquid and liquid-solid interfaces within the organic gasoline desulphurisation course of. Within the final decennia, numerous initiatives have been executed, leading to an enormous quantity of experimental information. Nonetheless, a minimal quantity of the complete potential of the work has been utilized, for the reason that majority has not been used for modelling to unravel the aforementioned phenomena. Therefore, a part of this work shall be focussing on creating fashions describing the switch and response kinetics on the interfaces. As well as, subsequent to using information obtained in earlier work, experimental work shall be carried out in batch and/or steady bench scale setups to collect information for mannequin validation and calibration. Moreover, when required, pilot plant services (owned by Paqell B.V.) could also be used validate the developed fashions.

We ask

  • MSc diploma in environmental know-how, biotechnology, chemical know-how or associated discipline;
  • Confirmed expertise with modelling software program, reminiscent of Matlab and Comsol;
  • Curiosity in switch processes;
  • Sturdy analytical abilities;
  • Skill to work in a multi-disciplinary staff;
  • Expertise with lab work;
  • Fluency in English, each written and spoken.

We provide

Wageningen College & Analysis presents wonderful phrases of employment. Just a few highlights from our Collective Labour Settlement embody:

  • sabbatical depart, examine depart, and paid parental depart;
  • working hours that may be mentioned and organized in order that they permit for the absolute best work-life stability;
  • the choice to accrue further vacation hours by working extra, as much as 40 hours per week;
  • there’s a sturdy give attention to vitality and you may make use of the sports activities services accessible on campus for a small price;
  • a set December bonus of 8.3%;
  • wonderful pension scheme.

Along with these first-rate worker advantages, you’ll after all obtain an excellent wage.

Extra data

Tutorial supervisor: Prof. dr. Okay.J. Keesman (Mathematical and Statistical strategies, Wageningen College).
Wetsus Supervisor: Dr. Ir. Jan Klok (Theme Coordinator Sulfur)

You may apply by deciding on your emptiness on Purposes on to WUR won’t be considered. The process to use is written intimately on

Solely purposes which can be full, in English, and submitted through the applying webpage earlier than the deadline shall be thought of eligible.

Key phrases: Organic Sulfide oxidation, Interfaces, Kinetics, Modelling


Since biogas and landfill gasoline streams are renewable power sources, their international use has elevated over the past many years and is anticipated to stay rising. Sometimes, poisonous hydrogen sulphide (H2S) must be faraway from these gasoline streams to stop dangerous sulphur dioxide emissions. The organic gasoline desulphurisation course of underneath haloalkaline circumstances is a cheap and environmentally pleasant various for the traditional physical-chemical gasoline desulphurisation processes. Along with H2S elimination from these gasoline streams, biologically produced elemental sulfur could be harvested from the method, as effectively. Particularly the comparatively small particle dimension and hydrophilicity of the biologically produced elemental sulfur are advantages for utility as fertilizer and/or fungicide. Because the analysis within the Sulfur Theme of Wetsus focusses on the optimization of the organic desulfurization course of, it facilitates the transition in the direction of a round sulphur financial system.

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