Die folgenden Team wurden durch die Jury für den Wettbewerb 2011 zugelassen:
Hamid Remezanipour penchah, Mohammad Hossein Karimi darvanjooghi, Razieh Abolghasemi lavi, Samira Jafarzadeh holagh, Mahdi Izadi
The rationale of this ChemCar is to utilize a chemical reaction to supply the motive force of a small car with increased efficiency and reduced air pollution. Obviously, when hydrogen peroxide (H2O2) reacts with potassium iodide ( KI ) an appreciable amount of oxygen gas and water vapor are produced at a short period of time. These reaction products are clean and have no adverse effect on the environment. The said reaction products can be used to supply the required energy to drive the car. The decomposition reaction of hydrogen perioxide is highly exothermic and produces high temperature water vapor and oxygen gas. Using a cylinder and piston mechanism the energy content of these energy carriers can be converted to mechanical work and can provide the required driving force for motion and displacement of the wheel. The proposed conceptual car is to have just one wheel and both the automotive and the brake system are to be located inside the wheel. The reactions are:
Step1: H2O2 (aq) + I- (aq) --> OI- (aq) + H2O (l)
Step2: H2O2 (aq) + OI-(aq) --> I- (aq) + H2O (l) + O2 (g)
Overall: 2H2O2 (aq) --> 2H2O(l) + O2(g)
To separate the products (H2O and O2) our chemcar has packed separator tower.
Fabian Rüthing, Martin Lüders, Christine Krimphove, Patrick Chudalla, Michael Freese, Sabrina Huesmann, Anne Gerten
Using a combination of a well-known reaction with a modern technology gave us the idea to combine a light emitting reaction with solar technology. The most important part of the car is the light chamber which is surrounded by solar cells. These solar cells are set in a combination of a series connection and a parallel connection. In the light chamber a solid reaction is taking place. Metal (e.g. Mg) is oxidized by an oxidizing agent (e.g. KMnO4, KClO3). Through this reaction UV-radiation is emitted. As the light strikes the solar cells it is converted into electrical energy by the solar cells. If applicable a capacitor will be set in between the solar cells and the electrical motor. To control the reaction we are able to mix the magnesium with sand and/or aluminum because these mixtures are less reactive. When all of the metal is oxidized and the capacitor is discharged the car will stop. The amount of metal defines the driving distance of our car.
Mikail Bagriacik, Hendrik Naatz, Nils Hoppe, Julien Zwicker, Marian Skalecki, Tebbe Paulsen, Tobias Wollborn
The concept of our ChemCar is based on a jet propulsion system connected with a pressure vessel. To pressurize the reaction chamber we use hydrogen peroxide which decomposes to oxygen and water in presence of iron(II) chloride according to the following reaction equation:
Fe2+ + 2H2O2 <-> Fe3+ + O2 + 2H2O
The resulting oxygen gas increases the pressure inside the vessel. When the gas passes through a nozzle, its kinetic energy creates a thrust which drives the car forward. The decomposition of hydrogen peroxide has been chosen as the driving reaction because it generates environmentally friendly products, i.e., water and oxygen.
Alexander Hirsch, Thomas Berners, Malte Dammann, Tim Becker, Jan Käsinger, Katrin Kössl, Julia Moll
The basis for our alternative Hydro-Natrium-Power-Car (HNP-Car) is a solid polymer fuel cell. The needed process hydrogen is obtained in a separate reactor. By combining sodium with a alcohol water mix, hydrogen gas is released. Note that the reaction rate of alcohol with sodium is lower compared to the water based reaction.
2 ROH + 2 Na --> 2RO-Na+ + H2
To decelerate the reaction rate and therefore controlling the kinetics of the HNP-Car, the proportion of alcohol can be elevated. The released hydrogen is used as fuel for the electrochemical oxidation. Atmospheric oxygen serves as oxidant at the cathode. The greatest advantage of a fuel cell is the direct conversion of chemical to electrical energy. Furthermore, any carbon dioxide emissions are avoided if the reactants are produced with renewable energy (e.g. solar power). The fuel cell itself only emits vaporized water.
2 H2+ O2 --> H2O
All of the generated electrical power is used to run an electrical engine which in turn moves the HNP-Car. The motion of the HNP-Car is stopped by the limitation of hydrogen. This is achieved by the exact measurement of sodium into the reactor.
Camillo Spöri, Lukas Thum, Viktor Heckel, Selcuk Demiral, Natalie Petrusch, Helge Böhmer, Johannes Lindner
Regarding decreasing fossil energy resources, discussions about regenerative energies and future technologies are necessary and unavoidable. The challenge of renewable energies (as there are solar or wind power plants for example) is the lack of facility in keeping up a constant level in generating electrical current. Saving excess energy in form of hydrogen as chemical fuel or energy carrier is one of the most discussed solutions, since this stored energy within the H2 molecules can be requested anytime as electrical current. The efficient implementation of this energy conversion is our team's aspiration. By using a H2/O2-PEM fuel cell (proton exchange membrane) chemical energy is reconverted to electricity, which powers an electric engine and is finally transferred into mechanical energy moving the driving axle. In contrast to combustion engines, hydrogen fuel cells emit no hazardous gases (like CO2, NOx …) and provide a higher efficiency. Concerning the advantage, research in fuel cell technology should be intensified and focused on making it available for public use.
Tobias Göcke, Bastian Brand, Tom Oldach
The Team BridgeRider, consisting of three students of chemical engineering at the Dresden University of Technology, will develop an engine which uses carbon dioxide as a reactant. While in the beginning the pressure is equal in the whole system, by the time in the reactor carbon dioxide will diffuse into water and will react with help of a hydroxide to a carbonate. Thus a pressure gradient between the carbon dioxide reservoir and the reactor will appear, which provides the energy for moving. This energy will be converted into kinetic energy by the use of two cylinders. When all given hydroxide in the reactor has reacted, the car will stop since the chemical equilibrium will be reached and the pressure will be balanced again. So the distance is accurate adjustable by the amount of given reagent in the reactor. This concept allows to move the car not by creating but by consuming carbon dioxide. Instead only water and a carbonate are the reaction's products.
For more information see: http://www.bridgerider.de
Thomas Brase, Carsten Ebeling, Annika Peitzmeier, Antonia Rieple, Carmen von Einem, Miriam Zenke
The KingCar (named after our supervising professor) utilises the reaction between potassium iodide and hydrogen peroxide. In this reaction, potassium Iodide catalyzes the decomposition of hydrogen peroxide into oxygen and water. The reaction is exothermic, producing an increase of temperature which is converted into electrical energy for an electric motor. This is achieved by using peltier elements which are able to convert a temperature difference into an electrical potential difference, in accordance with the Seebeck Effect. The heat from the reaction chamber and cooling provided by a mixture of ice and salt will be used to create a temperature difference of 70K on the surfaces of the peltier elements. The potential difference produced will be used to drive a small electric motor, which is connected via gear wheels to the axle, causing the motion of our car. The car will stop when the temperature difference is too small for the peltier elements to produce enough electrical energy to turn the electric motor. The stopping point is controlled by varying the initial amount of hydrogen peroxide reactant.
Reza Miremadoddin , Ehsan Zarmehri , Seyed ramin Miremadeddin , Seyedmehdi Sharifian
Caspian chemical machine works by electric energy produced throw 10 watt hydrogen PEM fuel cell stack. Polymer Electrolyte Membrane (PEM) fuel cell is used in our machine also called Proton Exchange Membrane fuel cell uses hydrogen fuel and oxygen from the air to produce electricity. Gaseous hydrogen is required to operate proton exchange membrane fuel cells (PEMFCs). Hydrogen storage systems comprise a large proportion of the weight & volume of fuel cell systems, and hence, it is important to choose an appropriate hydrogen source. Our Required hydrogen for fuel cell generates from in situ hydrolysis of 5% sodium borohydride solution in presence of cobalt carbonate powder as a catalyst because of its high hydrogen capacity but based on jury sight view and toxicity of SBH we can changed hydrogen production system from SBH catalytic reaction to powder aluminum reaction with alkali solution based on sub reactions:
2Al+6H2O --> 2 Al(OH)3+3H2
2Al(OH)3 + 2NaOH --> 2Na+ + 2[Al(OH)4]-
Machine's Brake system is based on controlling the amount of aluminum added to alkali solution tank.
Jonas Krause, Galina Klassen, Rabea Kleinebrahm, Daria Riazi
The absorption-desorption principle is a well-known industrial process. The development of CCS (carbon capture and storage) leads to high potential amine solutions. They have the ability to capture high amounts of carbon dioxide. Carrying out the desorption process, it is possible to generate a high volume flow rate of carbon dioxide. The carbon dioxide can be captured in a closed system to generate high pressure. The energy stored in this system can be extracted by a turbine or a similar machine. The process is controlled by the amount of carbon dioxide stored in the amine solution. Desorption will be started and controlled by addition of hydronium ions through an acid.
Martin Brüßler, Marina Bockelmann, Sarah Hellfeier, Martin Lucke, Sebastian Wagner
Our ChemCar named Chembulance is powered by electricity which is delivered by several aluminium - silver chloride batteries. To stop our ChemCar, we currently investigate two chemical reactions. Both use the development / removal of layers on electrodes. The first one uses a copper-graphite electrolysis cell filled with oxalic acid electrolyte. During the drive a layer of cupric oxalate is growing on the copper electrode until it is thick enough to increase the cell resistance. By this the motor stops. The driving distance may be varied by purporting a defined layer of cupric oxalate or by altering the area of the copper electrode surface. The second approach to stop the vehicle is a silver-platinum electrolysis cell. In this cell a silver layer, which has previously been deposited on the platinum electrode, will be dissolved while driving. When the whole layer is completely consumed the ChemCar stops. Our ChemCar is named Chembulance because it is powered by chemicals which can be found in many first aid kits. For example silver chloride is used to medicate burnings or as disinfection agent, aluminium foil can be used for heat conservation, the separator of the batteries is made of dressing material. All chemicals are available to the public and are not hazardous materials.
Dwi Putra Wijaya Hardiyanto, Averous Ali Al-Abid Muhammad, Fauzi Muhammad, Wicaktama Arditya
The basic concept of our car use energy from the high gas pressure from the chemical reaction decomposition of H2O2 into O2 with KI catalyst. This catalyst will accelerate the reaction of decomposition of H2O2 solution. Cars will move comparable with H2O2 reaction product of gas pressure. For the process control (stopping mechanism), we will control velocity reaction and pressure control of H2O2 in the tank until completed. This gas expansion reaction hold in a very safe condition and a very environmental safety, because all of this reaction hold in a vessel without we need to touch those chemical substances, it can possibly, by using many valves to flow the chemical substances, and those reaction produce a very environmental friendly substances, those are O2 and H2O. High pressure chemical reaction has a lot of potential hazard one of which pressure is too high which resulted in the explosion. To overcome this we use as a safety valve with a capacity of 12 bar. If the safety valve does not work then it will be overcome manually by opening a gate valve. Concept of product design base of this car is to use the pressure to produce movement and therefore form application from beetles defend themselves by spraying pressurized substance 100 0C and the boiling belly saved