Comparison of the UCB sulfur recovery process with conventional sulfur recovery technology for treating recycle gas from a crude oil residuum hydrotreater. [UCBSRP sulfur recovery process]
The University of California, Berkeley, Sulfur Recovery Process (UCBSRP) is being developed as an alternative to conventional sulfur recovery technology for removing hydrogen sulfide from gas streams and converting it to elemental sulfur. In the UCBSRP the hydrogen sulfide is absorbed by a physical solvent and the resulting solution of H/sub 2/S is mixed with a stoichiometrically equivalent amount of slulfur dioxide dissolved in the same solvent. The reaction between the two sulfur compounds forms water, which is miscible with the solvent, and elemental sulfur, which crystallizes from solution when its solubility is exceeded. Part of the sulfur formed in the reaction is burned to make the SO/sub 2/ needed in the process, and the heat of combustion is recovered in a waste-heat boiler. Sulfur is recovered by cooling the solution, settling the additional crystals that form, and centrifuging the slurry pumped from the bottom of the crystallizer-surge tank. In this report the UCBSRP is compared to conventional technology for the case of the removal of H/sub 2/S from the recycle gas of a high-pressure petroleum residuum hydrotreater. The conventional technology selected for this comparison consists of an absorber/stripper operation using diethanol amine as the absorbent, a Claus sulfur plant, and a SCOT tail-gas treating unit. From this comparison it is estimated that the DFC for the UCBSRP would be about 61% of that for the conventional technology. The utility costs for this application of the UCBSRP are estimated to be less than the credit for the high-pressure steam produced whereas the utility costs for the conventional process are substantially more. 6 refs., 3 figs., 9 tabs.
- Research Organization:
- Lawrence Berkeley Lab., CA (USA); California Univ., Berkeley (USA). Dept. of Chemical Engineering
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 5723885
- Report Number(s):
- LBL-21574; CONF-860648-1; ON: DE86012014
- Resource Relation:
- Conference: 6. annual contractors' meeting on contaminant control in coal-derived gas streams, Morgantown, WV, USA, 4 Jun 1986; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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