Objetivo
The main objective of the project is to provide the operators of sour natural fields with an innovative industrial solution to recover 99.9 % sulphur from the acid gases. It is a twofold objective:
- to improve the performances of sulphur recovery units (SRUs), up to an overall yield of 99.9 % by further processing of SRU tail gas, prior to final incineration of tail gas and release to atmosphere,
- to minimize capital and operating costs (with significant energy savings), by comparison with other existing commercial technologies.
The most currenty used technology that is based on the implementation of a recycled solvent washing system, is known to be very costly in capital and operating expenditures (CAPEX-OPEX). In particular, it exhibits very high energy requirements for regenerating (reboiling) the aqueous solvent. By comparison, the technology of the project is much less energy demanding, since energy requirement is limited to the heat of vaporization of sulphur recovered.
Completion of process design; complete process book, drawings of the skid arrangement with piping, datasheets for main equipment, specifications of safety systems, list of instruments are available. The major equipment items have been ordered.
The steel construction was assembled, vessels and machinery were placed. The pipework is under construction. Electrical/control systems under completion. Site studies for connections were completed.
The plant on skid was shipped to lacq after completion and installed on site. The commissioning is over. The operation has started with first performance results on line with the expectations. Main results relative to the optimisation of the adsorption/reaction phase have been collected and the expected performance has been achieved.
The demonstration pilot unit, to be installed in the Lacq natural gas plant of ELF EP (SW of France), will be sized to process 1000 Nm3/h of tail gas diverted from the outlet of one sulphur recovery train. It will be designed with two catalytics reactors:
- First catalytic reactor (Rl) to perform the complete conversion into H2S of residual sulphur compounds (Svap SO2 - COS - CS2) contained in SRU tail gas. This will be achieved by complete hydrogenation + hydrolysis of these compounds over a Co Mo type catalyst operating at 300 deg. C.
- Second catalytic reactor (R2) to perform the direct and selective oxydation of H2S into sulphur (H2S + 1/2 O2S + H2O) over the newly developed catalyst, at temperature below sulphur dew point in the process gas (100 - 130 deg. C). Air needed for the reaction is injected at requisite rate, to the reactor inlet. Sulphur so formed remains adsorbed in the catalyst. It is recovered by vaporization in heating up the catalyst up to about 300 deg. C.
This operation is carried out by means of a regeneration loop composed of the electrical heater E01 operating at 300 deg. C, the reactor (R2) to be regenerated, the sulphur condenser E02 where sulphur is recovered in liquid form by cooling down regeneration gas down to 150 deg. C and the blower K01 for recycling the regeneration gas back to the heater. The catalytic reactor (R2) is then cooled down to 100-130 deg. C by setting up the process gas circuit, back to the previous configuration (reaction step).
When cooling of reactor (R2) is completed, it can be put back on the tail gas circuit for the next step of epuration. Switching the reactors from steps to steps is automatically controlled by means of sequence timer according to the requisite timing.
Ámbito científico (EuroSciVoc)
CORDIS clasifica los proyectos con EuroSciVoc, una taxonomía plurilingüe de ámbitos científicos, mediante un proceso semiautomático basado en técnicas de procesamiento del lenguaje natural.
CORDIS clasifica los proyectos con EuroSciVoc, una taxonomía plurilingüe de ámbitos científicos, mediante un proceso semiautomático basado en técnicas de procesamiento del lenguaje natural.
- ingeniería y tecnologíaingeniería eléctrica, ingeniería electrónica, ingeniería de la informacióningeniería electrónicasistemas de automatización y control
- ingeniería y tecnologíaingeniería ambientalenergía y combustiblesenergía fósilgas natural
- ciencias naturalesciencias químicascatálisis
- ingeniería y tecnologíaingeniería ambientalgestión de residuosprocesos de tratamiento de residuos
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Tema(s)
Convocatoria de propuestas
Data not availableRégimen de financiación
DEM - Demonstration contractsCoordinador
92500 Rueil Malmaison
Francia