Rare earth element containing zeolitic material having the AEI framework type and coated monolith substrate
A rare earth element containing zeolitic material having an AEI-type framework structure, the framework structure of the zeolitic material comprising SiO 2 and X 2 O 3 , X being a trivalent element, wherein the zeolitic material contains one or more rare earth elements as counter-ions at the ion exchange sites of the framework structure, and wherein the zeolitic material is obtainable and/or obtained according to a process involving the hydrothermal treatment of the rare earth element containing zeolitic material at a temperature in the range of from 400 to 1,000° C. A coated monolith substrate comprising a rare earth element containing zeolitic material having an AEI-type framework structure, wherein the zeolitic material is supported on the monolith substrate. A process for the production of a coated monolith substrate comprising a rare earth element containing zeolitic material having an AEI-type framework structure.
1 . A coated monolith substrate comprising a rare earth element containing zeolitic material having an AEI-type framework structure, the framework structure of the zeolitic material comprising SiO 2 and X 2 O 3 , wherein X stands for a trivalent element, wherein the zeolitic material contains one or more rare earth elements as counter-ions at the ion exchange sites of the framework structure, wherein the zeolitic material is supported on the monolith substrate, wherein the zeolitic material displays an SiO 2 :X 2 O 3 molar ratio in the range of from 6 to 200, and wherein the AEI-type framework structure further comprises one or more transition metal elements M selected from the group consisting of Cr, Fe, Co, Ni, Cu, Zn, Pd, and Pt, including combinations of two or more thereof, as counter-ions at the ion exchange sites of the framework structure, wherein the one or more rare earth elements are Y, and wherein the one or more rare earth elements are contained in the zeolitic material in an amount in the range of from 1.5 to 2.2 wt.-%, based on 100 wt.-% of SiO 2 contained in the zeolitic material.
2 . The coated monolith substrate of claim 1 , wherein the monolith substrate is a wall-flow monolith substrate or a flow-through monolith substrate.
3 . The coated monolith substrate of claim 1 , wherein the zeolitic material is supported on the monolith substrate as, or as a component of, a washcoat layer.
4 . A rare earth element containing zeolitic material having an AEI-type framework structure, the framework structure of the zeolitic material comprising SiO 2 and X 2 O 3 , wherein X stands for a trivalent element, wherein the zeolitic material contains one or more rare earth elements as counter-ions at the ion exchange sites of the framework structure, wherein the zeolitic material is obtainable and/or obtained according to a process involving the hydrothermal treatment of the rare earth element containing zeolitic material at a temperature in the range of from 400 to 1,000° C., wherein the zeolitic material displays an SiO 2 :X 2 O 3 molar ratio in the range of from 6 to 200, and wherein the AEI-type framework structure further comprises one or more transition metal elements M selected from the group consisting of Cr, Fe, Co, Ni, Cu, Zn, Pd, and Pt, including combinations of two or more thereof, as counter-ions at the ion exchange sites of the framework structure, wherein the one or more rare earth elements are Y, and wherein the one or more rare earth elements are contained in the zeolitic material in an amount in the range of from 1.5 to 2.2 wt.-%, based on 100 wt.-% of SiO 2 contained in the zeolitic material.
5 . The coated monolith substrate according to claim 1 or the zeolitic material of claim 4 , wherein the one or more rare earth elements further comprise La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, and Sc, including combinations of two or more thereof.
6 . The coated monolith substrate according to claim 1 or the zeolitic material of claim 4 , wherein X is selected from the group consisting of Al, B, In, Ga, and combinations of two or more thereof.
7 . The zeolitic material of claim 4 , wherein the zeolitic material is obtainable and/or obtained according to a process involving the hydrothermal treatment of the rare earth element containing zeolitic material in an atmosphere containing from 1 to 25 vol.-% H 2 O.
8 . An emissions treatment system for treating exhaust gas from a combustion engine, wherein the emissions treatment system comprises a coated monolith substrate according to claim 1 or the rare earth element containing zeolitic material according to claim 4 .
9 . A method of using the coated monolith substrate according to claim 1 or the rare earth element containing zeolitic material according to claim 4 as at least one of a molecular sieve, an adsorbent, a catalyst or a precursor thereof, a catalyst support or a precursor thereof, a catalyst for the selective catalytic reduction (SCR) of nitrogen oxides NO x , an additive in fluid catalytic cracking (FCC) processes, a catalyst in organic conversion reactions, a catalyst in the conversion of alcohols to olefins, or a catalyst in methanol to olefin (MTO) catalysis.
10 . A method of using the coated monolith substrate according to claim 1 or the rare earth element containing zeolitic material according to claim 4 for at least one of ion-exchange, storage of CO 2 , adsorption of CO 2 , oxidation of NH 3 , oxidation of NH 3 slip in diesel systems, decomposition of N 2 O, selective catalytic reduction (SCR) of nitrogen oxides NO x , selective catalytic reduction (SCR) of nitrogen oxides NO x in exhaust gas from a combustion engine, or selective catalytic reduction (SCR) of nitrogen oxides NO x in exhaust gas from a diesel engine or from a lean burn gasoline engine.
11 . A process for the production of a coated monolith substrate comprising a rare earth element containing zeolitic material having an AEI-type framework structure, the framework structure of the zeolitic material comprising SiO 2 and X 2 O 3 , wherein X stands for a trivalent element, comprising
(1) providing a zeolitic material having an AEI-type framework structure, the framework structure of the zeolitic material comprising SiO 2 and X 2 O 3 ;
(2) subjecting the zeolitic material provided in (1) to one or more ion exchange procedures with H + and/or NH 4 + ;
(3) subjecting the zeolitic material provided in (1) or obtained in (2) to one or more ion exchange procedures with one or more rare earth elements;
(4) subjecting the zeolitic material obtained in (3) to one or more ion exchange procedures with one or more transition metal elements M; and
(5) providing the zeolitic material obtained according to (2) (3) or (4) onto a monolith substrate,
wherein the zeolitic material is provided as, or as a component of, a washcoat layer onto the monolith substrate, and
wherein the zeolitic material provided in (1) displays an SiO 2 :X 2 O 3 molar ratio in the range of from 6 to 200, and wherein the AEI-type framework structure further comprises one or more transition metal elements M selected from the group consisting of Cr, Fe, Co, Ni, Cu, Zn, Pd, and Pt, including combinations of two or more thereof, as counter-ions at the ion exchange sites of the framework structure,
wherein in (3) the one or more rare earth elements are Y, and wherein the one or more rare earth elements are contained in the zeolitic material in an amount in the range of from 1.5 to 2.2 wt.-%, based on 100 wt.-% of SiO 2 contained in the zeolitic material.
12 . The process of claim 11 , wherein the zeolitic material provided in (1) displays an SiO 2 :X 2 O 3 molar ratio in the range of from 8 to 100.
13 . The process of claim 11 , wherein X is selected from the group consisting of Al, B, In, Ga, and combinations of two or more thereof.
14 . The process of claim 13 , wherein X is Al.
15 . The process of claim 11 , wherein in (3) the one or more rare earth elements further comprise La, Ce, Sm, and Yb, including combinations of two or more thereof.
16 . A coated monolith substrate as obtainable and/or obtained according to the process of claim 11 .
17 . A process for the production of a coated monolith substrate comprising a rare earth element containing zeolitic material having an AEI-type framework structure, the framework structure of the zeolitic material comprising SiO 2 and X 2 O 3 , wherein X stands for a trivalent element, comprising
(1) providing a zeolitic material having an AEI-type framework structure, the framework structure of the zeolitic material comprising SiO 2 and X 2 O 3 ;
(2) subjecting the zeolitic material provided in (1) to one or more ion exchange procedures with one or more rare earth elements; and
(3) providing the zeolitic material obtained according to (2) onto a monolith substrate,
wherein the zeolitic material provided in (1) displays an SiO 2 :X 2 O 3 molar ratio in the range of from 6 to 200, and wherein the AEI-type framework structure further comprises one or more transition metal elements M selected from the group consisting of Cr, Fe, Co, Ni, Cu, Zn, Pd, and Pt, including combinations of two or more thereof, as counter-ions at the ion exchange sites of the framework structure,
wherein in (2) the one or more rare earth elements are Y, and wherein the one or more rare earth elements are contained in the zeolitic material in an amount in the range of from 1.5 to 2.2 wt.-%, based on 100 wt.-% of SiO 2 contained in the zeolitic material.
18 . The process of claim 17 , wherein the zeolitic material provided in (1) displays an SiO 2 :X 2 O 3 molar ratio in the range of from 8 to 100, or
wherein X is selected from the group consisting of Al, B, In, Ga, and combinations of two or more thereof, or
wherein in (2) the one or more rare earth elements further comprise are selected from the group consisting of Y, La, Ce, Sm, and Yb, including combinations of two or more thereof.
19 . The process of claim 18 , wherein X is Al.