| 摘要 |
<p>PURPOSE:To enable effective removal of hydrogen sulfide, etc., from gas and to economically obtain high-quality gas containing little amt. of sulfur by simply calcining inexpensive loess in air. CONSTITUTION:Natural loess calcined at 300-1200 deg.C in air shows extremely excellent performance as a desulfuring agent. Since the source clay is in a fine powdery state, it is once molded in tablets, and then pulverized and sifted so that particles of 0.59-0.84mm diameters are separated. These particles are calcined at 900 deg.C for three house in air. Another desulfurizing agent is prepared from ironstone by preliminarily pulverized into a coarse powder since ironstone breaks by heat. Then, this powder is calcined under the same conditions as for the desulfurizing agent using loess, pulverized and sifted. The desulfurizing obtained from loess shows excellent performance compared to other desulfurizing agent. For example, it takes longer time till the desulfurizing agent of this invention breaks, the exit concn, of hydrogen sulfide is significantly decreased, and moreover, the low concn, can be maintained for a long time.</p> |
