Empirical Modeling of Urea Synthesis Chemical Equilibria

In several ways, urea is one of the most prominent sources of fixed nitrogen due to its relative abundance in waste water treatment plants. In this study, the wastewater effluent from X-Chemical Industries was considered for hazard analysis in order to ascertain the water quality and impact at the outfall effluent of company X relative to environmental standards. The study period is for December, 2013 – February 2014. Based on the results, it was observed that at the company’s sluice gate, the desorber (primary treatment unit) did not perform optimally. Also, the variation of the parameters measured i.e. urea concentration, pH and ammonia concentrations exceeded the standards established by the World Bank, International Finance Corporation (IFC) and the National Environmental Standards and Regulations Enforcement Agency (NESREA), i.e. against the specified standard of 100 ppm, higher concentrations include December 3, 9, 11, 12, 19, 20, 21, 24, 25, 27, 28 and 29 with corresponding urea concentrations of 1457, 1970.4, 122.7, 163.2, 150.3, 171.4, 148.76, 270.78, 178, 123, 101.33 and 250.43 ppm respectively, whereas that of ammonia is higher than 5 ppm on December 3, 21, 24, 25, 26, 27, 28 and 29 with corresponding concentrations of 8.4, 9.69, 8.13, 9.45, 12.5, 6.98, 22.95 and 9.95 respectively, whereas, it was lowest on other days. It was also observed that the treated waste water advancing the creek (jetty) close to the plant, will have environmental consequences on marine lives such as marine micro-flora as well as fishes.

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Simulation of a reactor considering the Stamicarbon, Snamprogetti, and Toyo patents for obtaining urea

Guzmán

Lazo

2022

Open Chemistry

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In the present work, the plug flow reactor of a urea production plant from ammonia produced from natural gas of the Camisea fields (Peru) was designed, comparatively analyzing three commercial processes currently in operation: Stamicarbon, Snamprogetti, and Toyo. ASPEN PLUS software was used as a simulation tool. To carry out the simulation and subsequent comparison of the three urea production patents, it will start from the same feed of ammonia (37,851 kmol/day) and carbon dioxide (18,989 kmol/day) for the three cases. For the design of urea synthesis reactors, reactors of the same size (2.3 m diameter and 29 m length) were designed. The results are graphs that illustrate the variation of the length of the reactor with the reaction temperature, the variation of the length of the reactor with the residence time, and the variation of the conversion with the time for each patent.

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Empirical Modeling of Urea Synthesis Chemical Equilibria

Cited by 3 publications

References 24 publications

Process design and optimization of green processes for the production of hydrogen and urea from glycerol

Process design and optimization of green processes for the production of hydrogen and urea from glycerol

Empirical Assessment Of Ammonia And Urea Concentrations In Wastewater From A Pharmaceutical Plant: A Case Study

Simulation of a reactor considering the Stamicarbon, Snamprogetti, and Toyo patents for obtaining urea

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