Abstract: In a process for removing SO.sub.x and NO.sub.x from waste gases, SO.sub.x will quasi-completely be removed from the waste gases either in a first single step or in several steps, and this preferably by means of adsorption cokes (activated carbon) of an adsorptive capacity for SO.sub.2 of above 40 g SO.sub.2 per KG of coke, whereupon the thus pre-cleaned gas will be subjected to a secondary treatment after admixture of NH.sub.3 using catalysts of an absorptive capacity for SO.sub.2 of below 10 g SO.sub.2 per KG of catalyst, preferably below 5 g of catalyst, by reduction of NO.sub.x to N.sub.2.

Abstract: In a process for removing SO.sub.x and NO.sub.x from waste gases, SO.sub.x will substantially completely be removed from the waste gases either in a first or single step or in several steps, and this preferably by means of adsorption coke (activated carbon) having an adsorptive capacity for SO.sub.2 of above 40 g SO.sub.2 per kg of coke, whereupon the thus pre-cleaned gas will be subjected to a secondary treatment after admixture having NH.sub.3 using catalysts of an absorptive capacity for SO.sub.2 of below 10 g SO.sub.2 per kg of catalyst, preferably below 5 g of catalyst, by reduction of NO.sub.x to N.sub.2.

Abstract: One of the problems encountered when feeding dry or preheated coal into coking chambers resides in that dust is generated. This dust is indesirable since it can form deposits which are difficult to remove. A method of inhibiting the dust formation when coal is fed into coking chambers is disclosed. The method involves contacting the coal with used motor oil prior to the introduction of the coal into the coking chambers. The utilization of used motor oil for inhibiting dust formation provides the advantages of economy and reduction of environmental pollution.