2020 REFINING PROCESSES HANDBOOK PROCESS CATEGORIES COMPANY INDEX DESULFURIZATION Oxynator™/OxyClaus™ for Sulfur Recovery Units (SRU) Application: Oxygen enriched SRU operation for * CAPEX/plot space savings for new SRU * SRU debottlenecking and revamps. Feedstock-Acid gases, oxygen Description: In a conventional sulfur recovery unit (SRU), ambient air is used to oxidize part of the hydrogen sulfide (H₂S) in the acid gases to sulfur dioxide (SO₂). By enriching the combustion air to the Claus unit with pure oxygen, more feed gas can be processed in the SRU without violation of pressure drop or residence time constraints. Air Liquide Engineering & Construction provides the most suited oxygen enrichment technology depending on the client's requirements. OxynatorTM for low-level enrichment (< 28% O₂ in air): Low-level oxygen enrichment is a very cost-effective option to increase SRU capacity up to 125% as there is usually no modification required on existing SRU equipment. Air Liquide uses its patented OxynatorTM, a compact swirl type mixer, for safe and efficient oxygen mixing. The oxygen is injected into the combustion air upstream of the Claus burner. OxyClausTM for high-level enrichment (< 60% O₂ in air): Capacity increase to 200% can be achieved by using the well-known Lurgi OxyClausTM process that can safely handle high levels of oxygen. In the specially designed Lurgi OxyClausTM burner, the oxygen is directly injected into the flame via dedicated oxygen lances. The hot oxygen flame is surrounded by a cooler acid gas, air-flame shielding the refractory from exposure to high temperature. Products: Bright yellow sulfur, up to 99.9% purity Advantages: Main features: * Integration with ASU * Low power consumption * Pre-assembled packages or skid units to ease the erection. SWS gas Acid gas Claus tail gas Oxygen Catalytic stage I Thermal stage Catalytic stage II Sulfur Economics: OPEX-pure oxygen requirement: Approximately 0.15 ton O2-0.4 ton O2/ton sulfur (depending on enrichment level and feed gas composition) CAPEX-OxynatorTM: less than $0.5 MM; OxyClausTM: up to 35% less than conventional SRU with same capacity Utilities: Capacity, up to 600 tpd sulfur Installations: > 40 Licensor: Air Liquide Engineering & Construction Website: https://www.engineering-airliquide.com/oxyclaustm-sulfur-recovery-unit Contact: sulfur@airliquide.com Copyright © 2020 Gulf Energy Information. All rights reserved.http://www.hydrocarbonprocessing.com/ https://www.engineering-airliquide.com/oxyclaustm-sulfur-recovery-unit