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An enthalpy pump (10) for altering the humidity level of an air stream (12, 14). The enthalpy pump comprises a container having a transfer portion (38) disposed in a first air stream (12), with a liquid desiccant contained in the transfer portion (38). The transer portion (38) is permeable to water

An enthalpy pump (10) for altering the humidity level of an air stream (12, 14). The enthalpy pump comprises a container having a transfer portion (38) disposed in a first air stream (12), with a liquid desiccant contained in the transfer portion (38). The transer portion (38) is permeable to water vapor and impermeable to the liquid desiccant to thereby retain the liquid desiccant within the container while permitting exposure of the liquid desiccant to the first air steam. The transfer portion (38) is also adapted to move the liquid desiccant into and out of the first air stream whereby the latent and/or sensible energy of the first air stream can be altered.

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An enthalpy pump (10) for altering the humidity level of an air stream (12, 14). The enthalpy pump comprises a container having a transfer portion (38) disposed in a first air stream (12), with a liquid desiccant contained in the transfer portion (38). The transer portion (38) is permeable to water

An enthalpy pump (10) for altering the humidity level of an air stream (12, 14). The enthalpy pump comprises a container having a transfer portion (38) disposed in a first air stream (12), with a liquid desiccant contained in the transfer portion (38). The transer portion (38) is permeable to water vapor and impermeable to the liquid desiccant to thereby retain the liquid desiccant within the container while permitting exposure of the liquid desiccant to the first air steam. The transfer portion (38) is also adapted to move the liquid desiccant into and out of the first air stream whereby the latent and/or sensible energy of the first air stream can be altered. lement and the basic metal element in said sulfur solidifier is an alkali metal element or an alkaline earth metal element, and wherein the alkali metal element or the alkaline earth metal element in said sulfur solidifier is stronger in basicity than the alkali metal element or the alkaline earth metal element carried on said exhaust purifying catalyst. 20. The method according to claim 14, wherein said exhaust purifying catalyst carries an alkali metal element or an alkaline earth metal element and the basic metal element in said sulfur solidifier is an alkali metal element or an alkaline earth metal element, and wherein the alkali metal element or the alkaline earth metal element in said sulfur solidifier is easier to decompose than the alkali metal element or the alkaline earth