Investigation of Increasing Process Gas Cooling Performance by Improving Ammonia Oxidation Reactor Heat Exchangers
Year: 2025
Type: article
Abstract: Nitric acid production begins with the oxidation process of ammonia in the reactor. The aim is to cool the NOx gas as much as possible for high efficiency. It was aimed to increase the NOx gas cooling performance by improving the industrial-type ammonia oxidation reactor heat exchangers with a diameter of 3.8 m and a height of 6.5 m. To this end, the parametric analysis study, in which the horizontal and vertical distance between the exchanger tubes, the pipe diameters, and the distance between the exchanger packages (superheater, evaporator, pre-evaporator, economizer) were used separately, was carried out with the help of ANSYS Fluent program and the flow properties and performance values were examined. Best cooling performance as a result of different parametric studies; there was a study in which the process gas temperature was obtained at 562 0C with a 56 mm horizontal distance between the heat exchanger tubes (a). In other parametric studies, the lowest process gas temperatures are; it was found to be 7430C for the distance between heat exchanger packages (L), 732 0C for the vertical distance between heat exchanger tubes (b), and 682 0C for the heat exchanger tube diameter (D).
Source: Isı Bilimi ve Tekniği Dergisi
Authors: oguzhan erbas, Fadime Menekse İKBAL
Institution: Kütahya Dumlupınar Üniversitesi
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4409208005