Ifp Energies Nouvelles

Compagnie Generale Des Etablissements Michelin

Commissariat a L'energie Atomique

Eni S.p.a.

Iep Energies Nouvelles

Matthieu Rolland

Rejane Dastillung

Kirill Drobyshev

Jean-Christophe Gabelle

Sylvain Louret

Nicolas Boudet

Jean Christophe Viguie

Nathalie Brunard

Jean-Marie Seiler

Elena Sanz Garcia

Elena Garcia Sanz

Eric Lemarie

Sylvie Rouge

The present invention relates to a process for producing butadiene from ethanol, in two reaction steps, comprising a step a) of converting ethanol into acetaldehyde and a step b) of conversion into butadiene, said step b) simultaneously implementing a reaction step and a regeneration step in (n+n/2) fixed-bed reactors, n being equal to 4 or a multiple thereof, comprising a catalyst, said regeneration step comprising four successive regeneration phases, said step b) also implementing three regeneration loops.

Method for producing butadiene from ethanol with optimised in situ regeneration of the catalyst of the second reaction step

The present invention relates to a process for producing butadiene from ethanol, in two reaction steps, comprising a step a) of converting ethanol into acetaldehyde and a step b) of conversion into butadiene, said step b) simultaneously implementing a reaction step and a regeneration step in (n+n/2) fixed-bed reactors, n being equal to 2 or a multiple thereof, comprising a catalyst, said regeneration step comprising four successive regeneration phases, said step b) also implementing a regeneration loop for the inert gas and at least one regeneration loop for the gas streams comprising oxygen.

Process for producing butadiene from ethanol with in situ regeneration of the catalyst of the second reaction step

A rotary furnace () for the heat treatment of solids includes at least one rotary tube into which the solids are introduced and a first heater outside of the rotary tube that makes it possible to conduct a portion of the heat treatment in the absence of oxygen. A second heater for heating feedstock to improve heat treatment is formed by a second heating element (&#x2033;) positioned above the feedstock when the furnace rotates and at least one deflector panel that surrounds the heating element (&#x2033;) is provided on the side opposite to the feedstock () and arranged inside of the rotary tube. The rotary furnace is used to roast solid biomass.

Rotary furnace for radiative heat treatment of solids

A process for heat treatment of a solid, with a coolant solid, in which a stage for mixing the solid with the pre-heated coolant solid is carried out, with the coolant solid being a solid hydrocarbon. The solid hydrocarbon is ground, before the mixing stage with the solid, to obtain a solid hydrocarbon powder with a grain size of between 20 &#x3bc;m and 300 &#x3bc;m. The solid is ground, before the mixing stage with the coolant solid, to obtain solid pellets with a thickness of between 1 mm and 30 mm, a width of between 1 mm and 40 mm, and a length of between 1 mm and 100 mm. The mixing is carried out at a temperature of between 80&#xb0; C. and 700&#xb0; C.

Process for heat treatment of biomass with a coolant solid

The invention describes a process for the conversion of aqueous suspensions of lignocellulosic solids comprising a solids content of between 1 and 20% of dry material, said process comprising a step a) for compression of said suspension so as to separate the liquid phase present in and between the solids from the compressed solid phase and a step b) for extraction of at least the liquid phase, said liquid phase then being homogenized by heat and/or chemical treatments and reinjected on to the compressed solid phase.

Screw compression process for the conversion of lignocellulosic suspensions containing a high proportion of dry material

A process and a unit for fluidized bed torrefaction and grinding of particles of a biomass with a largest dimension of 2 cm to 5 cm, and which unit contains an envelope having a general shape of a sector having a) two substantially vertical walls delimiting that sector; and b) at least one inclined wall defining three zones, from bottom to top: a lower zone provided with a fluidization means, and provided with a grinder placed at the bottom of that zone; an intermediate zone (2) provided with a fluidization means; and an upper zone (3) provided with a fluidization means; and a pipe () for introducing the particles reaching into the unit to the level of the intermediate zone.

Process and device for fluidized bed torrefaction and grinding of a biomass feed for subsequent gasification or combustion

The invention describes a process for the conversion of aqueous solutions of lignocellulosic solids comprising a solids content of between 1 and 20% of dry material, said process comprising a step a) for compression of said solution so as to separate the liquid phase present in and between the solids from the compressed solid phase and a step b) for extraction of at least the liquid phase, said liquid phase then being homogenised by heat and/or chemical treatments and reinjected on to the compressed solid phase.

Process for the conversion of lignocellulosic solutions containing a high proportion of dry material

The process that is the object of the invention describes a process whose purpose is to produce a purified synthesis gas from lignocellulosic biomass that includes a pyrolysis stage, a purification stage placed upstream from the partial oxidation stage, and a cooling stage.

Method for producing a purified synthesis gas from a biomass including a purification step upstream from the partial oxidation

The present invention describes a device allowing secondary filtration of catalyst particles contained in an effluent from a process comprising a reactor operated in three-phase mode.

Secondary filtration device applicable to a three-phase process

A process for preparation of biomass mixed with a heavy hydrocarbon fraction yields a feedstock for the purpose of supplying a gasification unit. The process comprises a first mixing stage followed by a grinding stage and makes it possible to deliver a suspension of biomass particles less than 500 microns in size that are dispersed in the heavy hydrocarbon fraction.

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Vernaison, France

Matthieu Rolland