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Model predictive control (MPC) is an advantageous methodology to control the nonlinear processes such as tert-amyl methyl ether (TAME). Multiple reactions of the system make the synthesis of the TAME process more complicated which exhibits highly nonlinear behavior. The need to handle such difficult control problem has led to use neural network in MPC. In the present work, three different control...
The fluid flow regime has a great impact on the removal efficiency of oil from wastewater in a dissolved air flotation tank. This study examined the hydrodynamic characteristics of an industrial dissolved air flotation tank by modeling the flow pattern through the residence time distribution curve. The dissolved air flotation tank included an active zone, a plug flow zone and a dead zone. The flow...
This article investigates process integration in a direct methanol fuel-cell system from the points of view of controllability, efficiency, and safety. The two cooling and separation lines of anodic and cathodic effluent from the cell stack of a reference system are integrated into a single one. The potential for process integration is measured quantitatively, determining how much the heat exchangers...
In this study, the Eulerian–Eulerian computational fluid dynamics simulation with the kinetic theory of granular flow model was successfully used to compute mass transfer coefficients and Sherwood numbers in a circulating fluidized bed downer using the concept of additive chemical reaction and mass transfer resistances. The simulation was also used to determine the ozone molar concentration, axial...
Enhancement of heat transfer from a heat source to a flowing fluid within a tube is a challenging problem with many practical applications. In this paper, experimental investigation of a low-frequency (20–33kHz), high-intensity (500–1000W) ultrasonic field as a potential heat-transfer “process intensifier” is undertaken. Heat-transfer enhancement data collected in a miniaturized furnace tube over...
The primary intent for previous continuous hydrolysis studies was to minimize the reaction temperature and reaction time. In this work, hydrolysis is the first step of a proprietary chemical process to convert lipids to sustainable, drop-in replacements for petroleum based fuels. To improve the economics of the process, attention is now focused on optimizing the energy efficiency of the process, maximizing...
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