SPENT CAUSTIC WASTEWATER TREATMENT OF PETROCHEMICAL UNITS BYWET AIR OXIDATION PROCESS

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MORTAZAVIAN ASMA; MORTAHEB HAMID REZA; MAFI MORTEZA

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Journal: Journal of Applied Research in Chemistry Year:2018 | Volume:12 | Issue:2 Page(s): 59-67

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Information Journal Paper

Title

SPENT CAUSTIC WASTEWATER TREATMENT OF PETROCHEMICAL UNITS BYWET AIR OXIDATION PROCESS

Author(s)

MORTAZAVIAN ASMA | MORTAHEB HAMID REZA | MAFI MORTEZA | Issue Writer Certificate

Keywords

ADVANCED OXIDATION PROCESSQ1

WET AIR OXIDATIONQ1

SPENT CAUSTICQ1

WASTEWATER TREATMENTQ2

Abstract

Wet air oxidation (WAO) is an efficient way to treat industrial wastewaters. In presentstudy, WET AIR OXIDATION process was used for treatment of SPENT CAUSTIC effluents from ethylene unit inthe petrochemical industry. After analysis and determination of wastewater properties, the process wasperformed using an experimental set-up having 1-L reactor in the temperature range of 170-200 ˚ C and 6-9bar partial pressure of oxygen. The effects of parameters including liquid volume, temperature, and pH wereinvestigated. Performing experiments in two liquid volumes of 200 and 400 mL confirmed that requiredoxygen is provided at 190 ˚ C and changing the partial pressure of oxygen has no significant effect on processefficiency due to abundant oxygen in the reactor. The values of reduction in chemical oxygen demands(COD) after 3 h at temperatures of 170, 190, and 200 C were 61, 63, and 67%, respectively. The process at200 ˚ C and pH of 12 and 10 for 3 h could decrease 69 and 82% of COD, respectively. Applying homogenousFe3+ and Cu2+ catalysts could not enhance the performance of the process significantly. Furthermore, thekinetics of two-stage reactions of WET AIR OXIDATION process was also studied and the kinetic constants andactivation energies were determined. Since the real sample from a petrochemical unit was used, determinationof optimum operation conditions, investigation on the effect of catalyst, and also determination of kineticdegree of WET AIR OXIDATION reaction for SPENT CAUSTIC wastes of petrochemical units might be considered asthe novelties of the current study.

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APA: Copy

MORTAZAVIAN, ASMA, MORTAHEB, HAMID REZA, & MAFI, MORTEZA. (2018). SPENT CAUSTIC WASTEWATER TREATMENT OF PETROCHEMICAL UNITS BYWET AIR OXIDATION PROCESS. JOURNAL OF APPLIED RESEARCHES IN CHEMISTRY (JARC), 12(2 ), 59-67. SID. https://sid.ir/paper/180165/en

Vancouver: Copy

MORTAZAVIAN ASMA, MORTAHEB HAMID REZA, MAFI MORTEZA. SPENT CAUSTIC WASTEWATER TREATMENT OF PETROCHEMICAL UNITS BYWET AIR OXIDATION PROCESS. JOURNAL OF APPLIED RESEARCHES IN CHEMISTRY (JARC)[Internet]. 2018;12(2 ):59-67. Available from: https://sid.ir/paper/180165/en

IEEE: Copy

ASMA MORTAZAVIAN, HAMID REZA MORTAHEB, and MORTEZA MAFI, “SPENT CAUSTIC WASTEWATER TREATMENT OF PETROCHEMICAL UNITS BYWET AIR OXIDATION PROCESS,” JOURNAL OF APPLIED RESEARCHES IN CHEMISTRY (JARC), vol. 12, no. 2 , pp. 59–67, 2018, [Online]. Available: https://sid.ir/paper/180165/en

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