The monolithic design currently in use for SCR implies a very large volume of reaction and heterogeneous reaction yields and rates in the different parts of the reactor.

The Electrospun fibers allow achieving a dramatic increase of the exposed active area in the SCR reactor, higher yield of the NH3-NoX reaction and optimization of the fluid-dynamics and gas conversion. This will in turn make it possible to achieve: a reduction of the size and weight of the De-NOx SCR of 50% with respect to state of the art SCR, for installation and retrofit in existing ships and for possible integration into De-Sox units; reduce the consumption, need of purchase and costs of reactant (ammonia or urea) of 20%; reduce the installation costs of 20%; reduce operation and maintenance costs of 15%.

 

The main technological advancement proposed by the BLUESHIP is the realization of electrospun ceramic fibers tailored in designed textures modules, for the specific application to de-NOx Selective Catalytic Reactor (SCR) for naval application, throughout the electrospinning process. 

Fiber layout

 

Electrospinning technique is a flexible method which allows the simultaneous deposition of ceramic materials, as organic/inorganic precursors, directly in the shape of fibers in a large variety of microstructures and functionalization. The dimension of the fibers usually ranges from 10-8 to 10-6m depending on the spinning conditions. Such a small size range allows producing very large specific surface area materials in the order of 102-103 m2/gr (i.e. for silica). ES has been used for any kind of materials including ceramics, glasses and even metals.

 

electrospinning schema