method of separation of HCL and nitrogen
Answers
Explanation:
The present invention relates to the selective separation of hydrogen chloride from gaseous mixtures and, more particularly, to such separation of hydrogen chloride by adsorption from admixture with carbon dioxide and other gases and where the predominant gas is a hydrocarbon and the mixture may contain other gaseous impurities.
[0002]
The removal of hydrogen chloride is of primary interest in the cleanup of stack gas effluent from power plants. The major component of this effluent is carbon dioxide. However, depending on the nature and source of the fuel used, stack gases also contain hydrogen chloride with sulfur and nitrogen compounds, and similar impurities. It is usually necessary to reduce all of these species to substantially low levels to meet air quality guidelines; however, carbon dioxide is an inert and may be allowed to remain in the effluent gas. Thus, a means of removing hydrogen chloride, sulfur compounds, and nitrogen compounds, while excluding carbon dioxide is very necessary. It would be quite advantageous if the method utilized an absorbent or adsorbent which is easily regenerable.
[0003]
The literature of stack gas cleanup is quite extensive. Only a brief discussion is provided here to highlight the methods used.
[0004]
Hydrogen chloride may be removed from gas streams by scrubbing with water. However, the resultant aqueous solution is extremely corrosive. Alternatively, non-regenerable "chloride guards" are available commercially. These usually have sodium or calcium oxide as the reactive adsorbent. While effective for hydrogen chloride, they are usually not selective and may be regenerated with difficulty by calcining the spent adsorbent at high temperatures.
Answer:
electrolyting is the process I guess