Mathematical modeling of a solid oxide fuel cell operating on biogas

Abstract

Solid oxide fuel cells (SOFC) are the most efficient devices for directly converting the chemical energy of a fuel into electrical energy. This is one of the main reasons why these fuel cells have received a lot of attention from the scientific community and from several developers who have invested in the use of this technology in various applications. Biogas is one of the products of anaerobic decomposition (absence of gaseous oxygen) of organic matter, which occurs due to the action of certain types of bacteria. Biogas is mainly composed of methane (CH4) and carbon dioxide (CO2) and its use in solid oxide fuel cells has been investigated since Biogas is a renewable biofuel. The aim of this paper was to perform mathematical modeling of a solid oxide fuel cell operating on biogas. The results confirmed that the overall efficiency of the system is above 94% and the largest irreversibilities of the system are related to heat exchangers.

Evaluation of the use of blast furnace slag as an additive in mortars

“…The Granulated Blast Furnace Slag (GBFS) is a raw material used in the production of some cementitious products. Blast furnace slag consists of calcium silicates and aluminosilicates and other phases (Sultan et al, 2018;Yeung et al, 2020;Hadj et al, 2021;Priya et al, 2021;Cardoso et al, 2021c;Cardoso et al, 2022b;Colangelo et al, 2021;Jayarajan et al, 2021).…”

Deposition of Ti-Based Thin Films on AISI 1020 Steel Substrates Using the Cathodic Cage Plasma Deposition Technique

“…It ranges from the industry that manufactures the vehicles to the mechanical workshops responsible for the maintenance of cars, motorcycles, busses, trucks and tractors. Regarding this segment, the importance and necessity of an exhaust system for exhaust gasses is highlighted [1][2][3][4][5][6] .…”

“…The main function of the exhaust system is to eliminate the gasses produced after the combustion of the cylinders, that is, to direct the properly filtered gasses out of the vehicle and prevent toxic gasses from entering the interior of the vehicle. Other functions include reducing noise pollution and maintaining good vehicle performance 1,3,4,[12][13][14][15][16][17][18] . Figure 1 shows an example of a car exhaust system.…”

“…Various materials such as stainless steel, low-carbon steel, and cast iron are used in automotive exhaust systems because of their thermal properties. However, they can corrode because the environment of the car exhaust system is very corrosive, as the exhaust gasses and condensation water contain harmful elements such as Cl -, SO 4 2-, SO 3 2-, HCO 3-, CO 3 2-and CH 3 COOH 1,7,8,[19][20][21][22][23][24] . These harmful elements affect air quality and can lead to asphyxiation accidents or long-term occupational diseases.…”

Modeling of artificial neural networks for silicon prediction in the cast iron production process

“…The hot metal is cast and then sent in torpedo cars to the next stage to be processed into steel. Control of silicon is essential in the production of hot metal, as this impurity is harmful to steels [4]- [6]. During the production process, slag and hot metal are removed from the bottom of the reactor.…”