| abstract |
The invention relates to a composition comprising a support material which comprises silicon carbide on the surface of which is supported a zeolite material of the AEI / CHA family, at least 99% by weight of the framework structure of the zeolite material being constituted by a tetravalent element Y which is one or more of Si, Ge, Ti, Sn and V; by a trivalent element X which is one or more of the elements Al, Ga, In and B; by O; and by H. |