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Oil and gas recovery has higher requirements for columnar activated carbon. In addition to high iodine value, high specific surface area, and high carbon tetrachloride value, this activated carbon also requires a relatively average particle size and high BWC.

BWC full working capacity of butane. The working capacity of butane is defined as the difference between the saturated adsorption capacity of butane per unit volume of activated carbon and the amount of butane remaining after being purged by dry air under specified conditions.