Abstract: A gas treatment module and method includes a first gas purifier and a second gas purifier that cooperate to control a concentration of contaminants in an outgoing portion of a gas stream when the concentration of the contaminants in an incoming portion of the gas stream temporarily exceeds a threshold concentration. One example gas treatment module includes an adsorbent media that temporarily retains at least a portion of the contaminants in the gas stream when the concentration is greater than or equal to the threshold concentration. The adsorbent media later releases the retained contaminants, either to an outgoing portion of the gas stream or to a photocatalyst, when the concentration is less than the threshold concentration. One example method of gas treatment includes controlling the concentration of contaminants in the outgoing portion of the gas stream when the concentration of the contaminants in the incoming portion of the gas stream temporarily exceeds the threshold concentration.

Abstract: An air treatment system includes a filter and heating element, a plasma device, and a photocatalyst and UV light that cooperate to purify an air stream flowing through the air treatment system and protect the photocatalyst from passivating effects of certain contaminants. The air treatment system operates in two different modes. In the first mode, the air treatment system primarily draws air from and returns air to a space, and the heating element and plasma device are selectively shut off. In the second mode, the air treatment system regenerates the filter using the heating element to selectively heat the filter and release adsorbed contaminants. The plasma device is selectively turned on and chemically transforms the released contaminants into solid contaminant products. The solid contaminant products are deposited on a biased electrode of the plasma device. The UV light is turned off to ensure that the photocatalyst is inoperable during the release and transformation of the contaminants.

Abstract: A system is disclosed which incorporates low pressure drop contaminant removal from gas phases or streams, which advantageously can be used to enhance efficiency, improve humidity characteristics, and reduce capital cost of air handing systems such as HVAC systems and the like. Placement of the low pressure drop contaminant removal mechanism for enhancing effectiveness of same is also disclosed.

Abstract: Apparatus and method for controlling the composition of the atmosphere within a refrigerated container during the storage and/or transportation of perishable and/or respiring produce in which carbon dioxide and ethylene (and other evolved hydrocarbons) are removed from the container atmosphere by adsorption, the adsorptive materials being regenerated with ambient air.

Abstract: A system for controlling the atmosphere within a container, including a plurality of adsorption beds for the selective removal on a cyclical basis and in a predetermined order of at least part of any water vapour, ethylene, carbon dioxide and oxygen components present in the atmosphere in an adsorption phase of the cycle mechanism for controlling the flow of atmosphere within the system and mechanism for desorbing the adsorption beds in accordance with a desorption phase of the cycle.

Abstract: A system for controlling the atmosphere of a container for use in the storage and/or transportation of perishable goods which includes adsorption apparatus for the selective adsorption in whole or in part and in a predeterminded order of any water vapor, carbon dioxide, oxygen or ethylene contained within the atmosphere, a blower for urging the atmosphere to the adsorption apparatus, and a conduiting for returning the controlled atmosphere to the container.