An exhaust gas purification device includes a substrate including an upstream end and a downstream end and having a length Ls; a first containing Pd particles, extending between the upstream end and a first position, and being in contact with the substrate; a second containing Rh particles, extending between the downstream end and a second position, and being in contact with the substrate; and a third catalyst layer containing Rh particles, extending between the upstream end and a third position, and being in contact with at least the first catalyst layer, wherein an average of a Rh particle size distribution is from 1.0 to 2.0 nm, and a standard deviation of the Rh particle size distribution is 0.8 nm or less in each of the second catalyst layer and the third catalyst layer.

An exhaust gas purification device includes a substrate including an upstream end and a downstream end and having a length Ls; a first containing Pd particles, extending between the upstream end and a first position, and being in contact with the substrate; a second containing Rh particles, extending between the downstream end and a second position, and being in contact with the substrate; and a third catalyst layer containing Rh particles, extending between the upstream end and a third position, and being in contact with at least the first catalyst layer, wherein an average of a Rh particle size distribution is from 1.0 to 2.0 nm, and a standard deviation of the Rh particle size distribution is 0.8 nm or less in each of the second catalyst layer and the third catalyst layer.

The invention relates to a process of manufacture of a solid catalyst made of a support coated with a thin catalytic layer and to a process for eliminating gaseous and/or particulate pollutants in an exhaust gaz. The process of the invention of manufacture of a solid catalyst (1) comprising a support (2) coated with a catalytic layer (3) comprises the following steps: a) preparing a solution A by dissolving alkoxide and/or chloride precursors of at least one metal selected in the group consisting of Al, Si, Ti, Zr, Fe, Zn, Nb, V and Ce in a solvent S1 having a partition coefficient lower than 1 and containing less than 5% by volume of water, b) preparing a solution B containing a surfactant, an organic acid and/or hydrochloride acid (HCl) in a solvent S2 having a partition coefficient lower than 5, preferably less than 2, even more preferably less than 1, c) mixing solution A and solution B together, thereby obtaining a washcoat solution C, d) dip-coating the support (2) having OH groups at its surface into washcoat solution C, e) drying the coated support (2) obtained in step d), f) calcinating the dried coated support (2) obtained in step e). The process of the invention finds application in the field of elimination of VOC's, CO and/or particulate pollutants in an exhaust gaz.

The invention relates to a process of manufacture of a solid catalyst made of a support coated with a thin catalytic layer and to a process for eliminating gaseous and/or particulate pollutants in an exhaust gaz. The process of the invention of manufacture of a solid catalyst (1) comprising a support (2) coated with a catalytic layer (3) comprises the following steps: a) preparing a solution A by dissolving alkoxide and/or chloride precursors of at least one metal selected in the group consisting of Al, Si, Ti, Zr, Fe, Zn, Nb, V and Ce in a solvent S1 having a partition coefficient lower than 1 and containing less than 5% by volume of water, b) preparing a solution B containing a surfactant, an organic acid and/or hydrochloride acid (HCl) in a solvent S2 having a partition coefficient lower than 5, preferably less than 2, even more preferably less than 1, c) mixing solution A and solution B together, thereby obtaining a washcoat solution C, d) dip-coating the support (2) having OH groups at its surface into washcoat solution C, e) drying the coated support (2) obtained in step d), f) calcinating the dried coated support (2) obtained in step e). The process of the invention finds application in the field of elimination of VOC's, CO and/or particulate pollutants in an exhaust gaz.

Catalysts for the production of an alcohol and/or an ether from synthesis gas, methods of making the catalysts, and uses thereof are described. The catalyst can include catalytic Cu metal particles or oxides thereof and/or Ni metal particles or oxides thereof on an alkali metal or alkaline earth metal silicate support.

Catalysts for the production of an alcohol and/or an ether from synthesis gas, methods of making the catalysts, and uses thereof are described. The catalyst can include catalytic Cu metal particles or oxides thereof and/or Ni metal particles or oxides thereof on an alkali metal or alkaline earth metal silicate support.

A Fischer-Tropsch process for synthesizing hydrocarbons, by bringing a catalyst comprising a support and an active phase comprising a Group VIII metal into contact with a feedstock comprising synthesis gas, said catalyst being prepared according to the following steps: a) a porous support is provided; b) an organic compound containing oxygen and/or nitrogen is added to the porous support; c) a step of bringing said porous support into contact with a solution containing a salt of a precursor of the phase comprising a Group VIII metal is carried out; d) the porous support obtained at the end of step c) is dried;
characterized in that step b) is carried out by bringing together said porous support and said organic compound under conditions of temperature, pressure and duration such that a fraction of said organic compound is transferred in the gaseous state to the porous support.

A Fischer-Tropsch process for synthesizing hydrocarbons, by bringing a catalyst comprising a support and an active phase comprising a Group VIII metal into contact with a feedstock comprising synthesis gas, said catalyst being prepared according to the following steps: a) a porous support is provided; b) an organic compound containing oxygen and/or nitrogen is added to the porous support; c) a step of bringing said porous support into contact with a solution containing a salt of a precursor of the phase comprising a Group VIII metal is carried out; d) the porous support obtained at the end of step c) is dried;
characterized in that step b) is carried out by bringing together said porous support and said organic compound under conditions of temperature, pressure and duration such that a fraction of said organic compound is transferred in the gaseous state to the porous support.

A catalyst includes a mixed metal oxide; an alumina; silica, and calcium, where the mixed metal oxide includes Cu and at least one of Mn, Zn, Ni, or Co. Such catalysts exhibit enhanced tolerance sulfur-containing compounds and free fatty acids.

A catalyst includes a mixed metal oxide; an alumina; silica, and calcium, where the mixed metal oxide includes Cu and at least one of Mn, Zn, Ni, or Co. Such catalysts exhibit enhanced tolerance sulfur-containing compounds and free fatty acids.