Economic analysis for wet oxidation processes for the treatment of mixed refinery spent caustic
Economic analysis for wet oxidation processes for the treatment of mixed refinery spent caustic
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DOI：
10.1002/ep.10261
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发表时间：
2008-10-01
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影响因子：
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通讯作者：
Alnaizy, Raafat
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文献类型：
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作者：
Alnaizy, Raafat
氢氧化钠（苛性碱）仍然是炼油厂和石油化工厂从烃流中提取硫化氢、硫醇和有机酸的主要试剂之一。当地一家炼油厂积累了大约5000立方米的废苛性碱，其中含有甲苯基和环烷烃化合物。在排放到生物处理之前，新的化学需氧量（COD）浓度必须降低到小于1g/L。需要一种用于这种高体积和高浓度COD的简单且安全的处理系统。芬顿试剂法处理烧碱废水的试验结果表明，总COD去除率大于95%，出水COD低于1g/L。该方法在低于80 ℃的温度和环境压力下操作。因此，资本成本低于通常在200摄氏度和28巴下操作的湿式空气氧化（WAO）工艺。向美国一家提供全方位服务的公司出口废碱液的成本为每加仑1.21美元，这与短期内在单个发电厂进行处理的成本相比具有竞争力。(C)2008美国化学工程师学会。
Sodium hydroxide (caustic) continues to be one of the primary reagents used in refineries and petrochemical plants to extract hydrogen sulfide, mercaptans, and organic acids from hydrocarbon streams. A local refinery bad accumulated similar to 5000 m(3) of spent caustics containing cresylic and naphthenic compounds. ne chemical oxygen demand (COD) concentrations must be reduced to less than 1 g/L prior to discharge to biotreatment. A simple and safe treatment system for this high volume and high concentration of COD is desired. Bench-scale treatment of,pent caustic by the Fenton's reagent process had a total COD removal of greater than 95%, and the,fluent COD was lower than I g/L. ne process was of operated at a temperature lower than 80 degrees C and ambient pressure. The capital cost was thus lower than that of the wet air oxidation (WAO) process that normally operates at 200 degrees C and 28 bars. The cost of exporting spent caustic to a,full-service company in USA was $1.21 per gallon that was competitive with treatment at the individual generation sites on a short-term basis. (C) 2008 American Institute of Chemical Engineers.