Patent ID: 8414690

Claim:
An apparatus for conditioning a biogas stream including biogas and impurities by removing impurities from the biogas stream, the apparatus comprising: an upper manifold; a lower manifold; an inlet through which a biogas stream containing impurities may be introduced into the apparatus; an outlet through which a conditioned biogas stream from which impurities have been removed may be removed from the apparatus; at least one heat exchange member disposed between the upper and lower manifolds, the heat exchange member comprising a thermally conductive material so as to draw heat away from and/or transfer heat into a zeolite bed or other contents in heat transferring contact with the heat exchange member; and a bed comprising zeolite that selectively absorbs impurities from the biogas stream while providing substantially no absorption of the biogas, the zeolite bed being in heat exchanging contact with the heat exchange member, wherein the heat exchange member comprises a thermally conductive material so as to draw heat away from the zeolite bed as the biogas stream containing impurities is introduced through the inlet into the apparatus so as to contact the zeolite bed such that the zeolite adsorbs at least some of the impurities within the biogas stream while absorbing substantially none of the biogas within the biogas stream; wherein the at least one heat exchange member is configured so that any given location within the bed is no more than 3 inches from the heat exchange member.