Cd-exchanged zeolite rho compositions and compositions of zeolite rho encapsulated with hydrogen made therefrom
AssigneesE. I. Du Pont de Nemours and Company, University of Connecticut
InventorsDavid Richard Corbin, Steven Lawrence Suib
Life of this patent
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Abstract
Novel Cd-exchanged rho compositions and compositions of zeolite rho encapsulated with hydrogen made therefrom are disclosed. The Cd-exchanged zeolite rho compositions are useful in separating and selectively removing hydrogen from hydrogen-containing process streams and storing the separated hydrogen therein. Encapsulation of hydrogen can be accomplished in large amounts even at pressures of 1 atmosphere.
Claims17
A Cd-exchanged zeolite rho composition of the formula:
- Cd.sub.w M1.sub.x M2.sub.y M3.sub.z Si.sub.a Al.sub.b O.sub.96
- wherein:
- M1 is Cs and M2 and M3 are each selected from the group consisting of Li, Zn, Rb, Sr, H, Mg, Ba, NH.sub.4, Ca, K, Na and Cs;
- w is about 5;
- x is about 2 and y and z are each 0-6;
- a is 36-48;
- and
- b is 0-12, with the proviso that a+b=48.
A Cd-exchanged zeolite rho composition of the formula:
- Cd.sub.w Si.sub.a Al.sub.b O.sub.96
- wherein:
- w is about 6;
- a is 36-48;
- and
- b is 0-12, with the proviso that a+b=48.
A composition of zeolite rho encapsulated with hydrogen wherein a Cd-exchanged zeolite rho composition of the formula:
- Cd.sub.w M1.sub.x M2.sub.y M.sup.3.sub.z Si.sub.a Al.sub.b O.sub.96
- wherein:
- M1, M2 and M3 are each selected from the group consisting of Li, Zn, Rb, Sr, H, Mg, Ba, NH.sub.4, Ca, K, Na and Cs;
- w is from about 1 to about 6;
- x, y and z are each 0-6;
- a is 36-48;
- and
- b is 0-12, with the proviso that a+b=48;
- is encapsulated with hydrogen.
A method of encapsulating hydrogen with a zeolite rho composition comprising contacting a Cd-exchanged zeolite rho composition of the formula:
- Cd.sub.w M1.sub.x M2.sub.y M3.sub.z Si.sub.a Al.sub.b O.sub.96
- wherein:
- M1, M2 and M3 are each selected from the group consisting of Li, Zn, Rb, Sr, H, Mg, Ba, NH.sub.4, Ca, K, Na and Cs;
- w is from about 1 to about 6;
- x, y and z are each 0-6;
- a is 36-48;
- and
- b is 0-12, with the proviso that a+b=48;
- with hydrogen.
A method of storing hydrogen comprising contacting a Cd-exchanged zeolite rho composition of the formula:
- Cd.sub.w M1.sub.x M2.sub.y M3.sub.z Si.sub.a Al.sub.b O.sub.96
- wherein:
- M1, M2 and M3 are each selected from the group consisting of Li, Zn, Rb, Sr, H, Mg, Ba, NH.sub.4, Ca, K, Na and Cs;
- w is from about 1 to about 6;
- x, y and z are each 0-6;
- a is 36-48;
- and
- b is 0-12, with the proviso that a+b=48;
- with hydrogen.
Dependencies are inferred from the claim text.