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AuthorAbu Reesh, Ibrahim M.
Available date2022-12-28T06:41:46Z
Publication Date2021-07-02
Publication NameSustainability (Switzerland)
Identifierhttp://dx.doi.org/10.3390/su13147923
CitationAbu Reesh, I. M. (2021). Acrylonitrile Process Enhancement through Waste Minimization: Effect of Reaction Conditions and Degree of Backmixing. Sustainability, 13(14), 7923.‏
URIhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85111116623&origin=inward
URIhttp://hdl.handle.net/10576/37699
AbstractWaste minimization in reactor design is an effective approach for pollution control, when compared to the traditional practice of the end-of-pipe treatment. Reactor degree of backmixing and operating conditions are important factors that determine the performance of chemical process, including environmental impact. For the purpose of waste minimization, two modeling methods were used for simulating the performance of the acrylonitrile production reactor, based on the ammoxidation of propylene. The effect of residence time, temperature, degree of backmixing on the steadystate propylene conversion, and production of waste were determined. The tanks-in-series model and the axial dispersion model were used to account for the degree of backmixing. The two main by-products in the acrylonitrile process are acetonitrile and hydrogen cyanide, which are both highly toxic waste. Extensive reactor backmixing reduces propylene conversion, especially at high temperature and residence time. Minimum acetonitrile production is favored by low residence time, high to moderate temperature, and no backmixing. Minimum hydrogen cyanide production is favored by low residence time, low temperature, and no backmixing. At 450 °C, the percentage of increase in the selectivity of acrylonitrile, with respect to hydrogen cyanide at plug-flow reactor conditions, as compared to a continuous stirred tank reactor, is 87.1, 74.3, 50.9, 30.4, and 12.4% at a residence time of 1, 2, 4, 6, and 8 s, respectively. The reactor degree of backmixing and operating conditions are important factors that affect the environmental friendliness of the acrylonitrile production process.
Languageen
PublisherMDPI AG
SubjectAcrylonitrile
Axial dispersion model
Backmixing
MATLAB function bvp4c
Tanks-in-series-model
Waste minimization
TitleAcrylonitrile process enhancement through waste minimization: Effect of reaction conditions and degree of backmixing
TypeArticle
Issue Number14
Volume Number13
dc.accessType Open Access


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