| 摘要 |
<p>This disclosure describes a process for the preparation of iron-bearing and calcium-bearing sorbent solids for use in the desulfurization of gases. The process involves mechanical procedures for generating porous agglomerated solids that are high in surface area and uniquely suitable in both particle size and mechanical properties for processing in gas-solids contacting equipment of conventional design. The process also involves the use of water in the agglomeration procedures in quantities controlled to react both chemically and mechanically with solid components of the feed materials and to generate adhesive cement between finely divided solids in porous agglomerated particles of the sorbent product. All components of the solid feed to the sorbent preparation process may be obtained from both finely divided new solids and solids obtained by recycle of regenerated solids from other sections of the combined process. The selection of either iron-bearing or calciumbearing solids for use in the process generally depends on the type of gas that is to be desulfurized, and on both the total demand and the net cost of the new solids required by the combined process, Iron-bearing sorbents are significantly less costly to regenerate than calcium-bearing sorbents, and generally are preferred for most industrial uses. When iron-bear-ing sorbents are utilized in the desulfurization of fuel gases at temperatures above 750.degree.C, magnesium and/or aluminum bearing diluent materials are employed as components of the new feed to the sorbent preparation process. These diluents, when converted to refractory oxides in agglomerated particles of the sorbent solids by procedures of the combined process, eliminate the tendency of these solids otherwise to fuse, to agglomerate, and to defluidize in contact with the hot gases in desulfurization absorber equipment.</p> |
