Objective
IT IS EXPECTED TO FIND :
- WHETHER SUCH A PROCESS IS TECHNICALLY FEASIBLE IN PRACTICE;
- IF SO, HOW TO OPERATE IT.
A FEASIBLE STUDY HAS SHOWN THAT THERE IS ALREADY A MARKET FOR SUCH A PROCESS.
The absorption and regeneration behaviour of low cost sorbents to be used for the regenerative desulphurisation of AFBC flue gas was studied. The 3 sorbent types selected for this study were natural limestones, agglomerated limestone pellets and barium titanate. Agglomerated limestone pellets appeared to have the best absorption and desorption characteristics due to their favourable microstructures.
Thermogravimetric analysis (TGA) experiments showed that the reductive regeneration of sulphurated sorbents has the highest efficiency at low hydrogen partial pressures and high temperatures.
The regeneration of calcium sulphate was studied extensively.
Tests have shown that a circulating fluidised bed reactor is suitable for both the absorption and the oxidation step, provided that the sorbent particles have a sufficiently high mechanical strength.
The absorption and regeneration behaviour of low cost sorbents to be used for the regenerative desulphurisation of atmospheric pressure fluidised bed gasification (AFBG) flue gas was studied. 3 sorbent types were selected: natural limestones, agglomerated limestone pellets and barium titanate. Agglomerated limestone pellets appeared to have best absorption and desorption characteristics due to their favourable microstructure. A subgrain model was developed to describe mathematically the sulphation of both natural limestones and agglomerates.
The regeneration of calcium sulphate was studied extensively. Strong evidence was found that the regeneration proceeds via a 2 step mechanism. In the first step the calcium sulphate is reduced to calcium sulphide. In the second step the calcium sulphide reacts according to an apparent solid solid reaction with remaining calcium sulphate, yielding calcium oxide and sulphur dioxide. The kinetics of both regeneration steps were studied. The findings support the feasibility of a 2 step regeneration route that yields concentrated sulphur dioxide.
FROM THE ENVIRONMENTAL POINT OF VIEW, FLUIDIZED BED COMBUSTION IS AN ATTRACTIVE PROPOSITION FOR GENERATING ENERGY FROM COAL. REGENERATIVE SULPHUR CAPTURE PROCESSES CAN CONTROL EMISSIONS OF SULPHUR DIOXIDE WITHOUT PRODUCING LARGE QUANTITIES OF SOLID WASTE. IN FUTURE, THE USE OF SUCH A PROCESS WILL BE ABLE TO HELP SOLVE PROBLEMS OF SOLID WASTE PRODUCED BY COAL COMBUSTION. IN PARTICULAR, SMALL ENERGY GENERATORS (LESS THAN 100 MWTH) WILL BE ABLE TO USE TECHNIQUES TO BURN COAL SENSIBLY IN AN AFBC PLANT. THIS NEW TECHNIQUE IS AN EXTENTION OF THE ONE-OFF USE OF LIMESTONE AS A SORBENT FOR AFBC, A METHOD ALREADY APPLIED.
THE PROPOSED PROJECT FOCUSES ON SMALL-SCALE FUNDAMENTAL RESEARCH ON THE PREPARATION AND FUNCTIONING OF SORBENTS AND LOOKS INTO THE OPERATING CONDITIONS REQUIRED BY A REGENERATIVE SULPHUR CAPTURE PROCESS.
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
- natural sciences chemical sciences electrochemistry electrolysis
- engineering and technology environmental engineering energy and fuels fossil energy coal
- natural sciences chemical sciences inorganic chemistry alkaline earth metals
- natural sciences earth and related environmental sciences atmospheric sciences meteorology atmospheric pressure
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Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
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Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Coordinator
7500 AE ENSCHEDE
Netherlands
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.