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Air / Gas treatment to restrict harmful odourous gases is one of the key requirements in petroleum industry. In some cases, it is required to treat gases to protect catalysts, downstream equipment, pipes etc. Furthermore, as air emission regulations drives the need for the stringent control of hazardous air pollutants, gases with impurity levels of few hundreds ppm are to be treated cost effectively. Air/ gas treatment using activated carbon is the cheapest method for this type of treatments and well ahead of any of the other treatment technologies.