Show IRON OXIDE FOR GAS purification purification when then coal containing any considerable amount of sulphur is used in the manufacture of city C gas as for cooking or illuminating purposes considerable amounts of hydro hydrogen 6 en sulphide are found in the gas produced and it becomes necessary to t get rid of this by some purification process the purifying material most commonly used is iron oxide but while it has been in general use for this purpose for many years exact information such as would afford a basis for the selection of the best oxide preparation for a particular case has been lacking A bulletin on the subject has just recently been issued by the university of illinois this bulletin deals with certain experimental work carried on at the university under the illinois coal mining investigations operative cooperative co agreement with the object of obtaining more exact information with respect to certain laboratory and commercial preparations of iron oxide A perusal of the description of the experimental work and the results obtained should enable any gas engineer to choose the preparation of iron oxide most suited to conditions at his plant with considerably more certainty than has often been the case in the past copies of this bulletin no may be had without charge by addressing the engineering experiment station urbana ill |