Techno-economic assessment of two novel feeding systems for a dry-feed gasifier in an IGCC plant with Pd-membranes for CO2 capture

This study focuses on the application of Pd-based membranes for CO[subscript 2] capture in coal fueled power plants. In particular, membranes are applied to Integrated Gasification Combined Cycle with two innovative feeding systems. In the first feeding system investigated, CO[subscript 2] is used both as fuel carrier and back-flushing gas for the candle filters, while in the second case N[subscript 2] is the fuel carrier, and CO[subscript 2] the back-flushing gas. The latter is investigated because current dry feed technology vents about half of the fuel carrier, which is detrimental for the CO[subscript 2] avoidance in the CO[subscript 2] case. The hydrogen separation is performed in membrane modules arranged in series; consistently with the IGCC plant layout, most of the hydrogen is separated at the pressure required to fuel the gas turbine. Furthermore, about 10% of the overall hydrogen permeated is separated at ambient pressure and used to post-fire the heat recovery steam generator. This layout significantly reduces membrane surface area while keeping low efficiency penalties. The resulting net electric efficiency is higher for both feeding systems, about 39%, compared to 36% of the reference Selexol-based capture plant. The CO[subscript 2] avoidance depends on the type of feeding system adopted, and its amount of vented gas; it ranges from 60% to 98%. From the economic point of view, membrane costs are significant and shares about 20% of the overall plant cost. This leads in the more optimistic case to a CO[subscript 2] avoidance cost of 35 €/t[subscript CO2], which is slightly lower than the reference case.Seventh Framework Programme (European Commission) (Grant agreement no. 241342

Evaluating the progress in achieving Good Environmental Status in the Mediterranean:a methodology to assess the effectiveness of Marine Strategy Framework Directive's Programmes of Measures

The Marine Strategy Framework Directive (2008/56/EC) aims to achieve Good Environmental Status of the European Union's marine waters for which the EU Member States are preparing Programmes of Measures (PoMs) to coordinate policies and improve the marine environmental status. These Programmes are revised every six years, yet there is currently no comprehensive and robust methodology to assess the effectiveness of PoMs and their contribution to reaching Good Environmental Status. This paper presents a new and concrete methodology combining policy, socio-economical, and environmental aspects, relying on available monitoring data, official reporting, and expert judgement to yield easily comparable numerical results. The utility of this methodology is also demonstrated on a series of hypothethical measures under descriptors 1 (Biological diversity), 3 (Commerical fisheries stocks), 6 (Seafloor integrity), and 10 (Marine litter). The demonstration shows how the method can be used by policy and decision-makers across the EU, as well as a variety of expert and non-governmental actors to evaluate the progress and potential of individual PoMs on national and (sub)regional levels. Therefore, the method could pave the way to more coherent, coordinated and effective measures to protect EU seas

Biomass gasification to produce syngas

International audienc