炭酸アンモニウムを混入したアンモニア水による粗ガス中の硫化水素の吸収について
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The absorption process using aqueous ammonia solution for the removal of hydrogen sulfide in coal gas etc., has not been sufficiently solved yet. Authors wished to make clear the mechanism of the above process and establish the process from a point of view of chemical engineering. It was found that the rate of the absorption of hydrogen sulfide was greatly increased by containing ammonia in the mixed gas. Method of experiment was as follows : Absorption appratus was consisted of several different packed columns of 35 - 140 mm dia. with raschig rings of 8mm and 15 mm dia. The gases to be absorbed were (a) only hydrogen sulfide except nitrogen as carrier, (b) containing carbon dioxide in the above, and (c) containing ammonia in each of the above. Absorbent was aqueous ammonia solution containing ammonium carbonate. The results obtained were as follows : (1) The empirical formula for the absorption of hydrogen sulfide from the mixed gases without ammonia was (H.T.U.)_(OG) = K(Gw)^1.37 ･ (Lw)^-1.35･････････････････････(1) where, the value of K differed by the experimental conditions. (i) For the hydrogen sulfide with carrier nitrogen and 8mm dia. rasching rings, K = 70 (ii) For the mixed gas containing carbon dioxide and 8mm raschig rings, K = 80 And the value of K was the same as the above in the case without carbon dioxide and 15 mm raschig rings. (2) The rate of the absorption of hydrogen sulfide from the mixed gases containing ammonia were evidently increased, even if carbon dioxide was contaimed. Thus the empirical formula was not found in the above conditions. Authers are now investigating on the fact that the presence of ammonia in the mixed gases considerably increased the rate of absorption of hydrogen sulfide. (3) Ammonia and hydrogen sulfide in the mixed gases were absorbed very well into the absorbent. On the contrary, carbon dioxide was not so absorbed under the same conditions.
- 山形大学の論文
- 1964-01-30
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