Why is Hydrogen NOT considered a fuel? How can it be applied in an alternate energy...
Why is Hydrogen NOT considered a fuel? How can it be applied in an alternate energy context?
Homework Answers
Hydrogen is not considered as fuel because it is highly combustible in nature. the reaction is explosive when it makes contact with air. the energy released is too much for domestic usage.hydrogen is not naturally occurred on Earth and must be prepared. so storing of hydrogen is very difficult because of hydrogen in its gaseous state. so hydrogen is not used as domestic fuel even it has higher calorific value. but it can be applied in alternate energy due to the increase in dependency on non-renewable fuel sources such as petroleum and coal. hydrogen is clean energy and one kg of hydrogen gives more energy than a gallon of gasoline and gives less CO2 emission. some space agencies already started using hydrogen as a fuel for sending space shuttles.
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Why is Hydrogen NOT considered a fuel? How can it be applied in
an alternate energy...
Anaerobic digestion for biogas production or wastewater treatment • Intro: • Why we need alternative fuel/energy...
Anaerobic digestion for biogas production or wastewater treatment • Intro: • Why we need alternative fuel/energy sources and why biomethane? • Why wastewater must be treated (link to biogeochemical cycles/decomposition) significance/context (20%) • Microbiology of AD (50%) • Reactor types used for biogas production or wastewater treatment and how they are applied – case studies or examples welcome (30%) Microbiology
True or False: Hydrogen fuel cells emit only water and no carbon dioxide so all fuel...
True or False: Hydrogen fuel cells emit only water and no carbon dioxide so all fuel cell applications can be considered to be a carbon neutral energy source.
Quantitative: In the 1950s liquid hydrogen was considered as a fuel for a new type of...
Quantitative: In the 1950s liquid hydrogen was considered as a fuel for a new type of aircraft being developed, the SR-71 Blackbird (shown in Figure 1). Figure 1: The SR-71 Blackbird Early research on the project focused on which fuel to use for the Blackbird. Pratt & Whitney had a J-57 engine that was designed for kerosene and being considered for implementation on the Blackbird. The J-57 only took 5 months to convert to running on liquid hydrogen, however tests...
Hydrogen (H) and oxygen (O.) are reacted in a fuel cell to produce energy. The product...
Hydrogen (H) and oxygen (O.) are reacted in a fuel cell to produce energy. The product of the reaction is water, and any excess gases are vented after the fuel cell, as shown in the figure below. The hydrogen and oxygen tanks are maintained at the same temperature and pressure, and they feed at the same volumetric flow rate. The reaction goes to 60% completion in the fuel cell (hydrogen basis) If all of the unreacted hydrogen and a portion...
Some hydrogen fuel cell vehicles fill up at a gas station that uses hydrolysis to produce...
Some hydrogen fuel cell vehicles fill up at a gas station that uses hydrolysis to produce the hydrogen gas. When hydrogen is combined with oxygen in the fuel cell, energy is released to power the car. The reaction is like hydrolysis in reverse 2H2O (liq.) + energy ← 2H2 (gas) + O2 (gas) Pick all statements which are true. Select one or more: a. using hydrogen made by electrolysis is more efficient and cleaner than using the fuel or electricity...
Some hydrogen fuel cell vehicles fill up at a gas station that uses hydrolysis to produce...
Some hydrogen fuel cell vehicles fill up at a gas station that uses hydrolysis to produce the hydrogen gas. When hydrogen is combined with oxygen in the fuel cell, energy is released to power the car. The reaction is like hydrolysis in reverse 2H2O (liq.) + energy ← 2H2 (gas) + O2 (gas) Pick all statements which are true. Select one or more: a. hydrogen is storing a fraction of the energy from the source of the electricity, which could...
Some hydrogen fuel cell vehicles fill up at a gas station that uses hydrolysis to produce...
Some hydrogen fuel cell vehicles fill up at a gas station that uses hydrolysis to produce the hydrogen gas. When hydrogen is combined with oxygen in the fuel cell, energy is released to power the car. The reaction is like hydrolysis in reverse 2H2O (liq.) + energy + 2H2 (gas) + O2 (gas) Pick all statements which are true. Select one or more: O a. hydrogen fuel cells can produce more energy than is used to create the hydrogen by...
15. How is the relationship between fuel cost, speed and power installed determined? Why slow steaming...
15. How is the relationship between fuel cost, speed and power installed determined? Why slow steaming was considered necessary and how is it used for economic performance of a ship?
15. How is the relationship between fuel cost, speed and power installed determined? Why slow steaming was considered necessary and how is it used for economic performance of a ship?
(1) About a hydrogen fuel cell, (a) The fuel is hydrogen. (b) There is an oxidation...
(1) About a hydrogen fuel cell, (a) The fuel is hydrogen. (b) There is an oxidation reaction on the surface of the anode. (c) The current flows from the anode to the cathode through the external circuit. (d) There is an oxidation on the surface of the cathode. (2) A fuel cell includes: (a) An anode and a cathode (b) A layer of electrolyte (c) Two resistors (d) one capacitor (3) About a bipolar plate, (a) It is used in...
Hydrogen, a potential future fuel, can be produced from carbon (from coal) and steam by the...
Hydrogen, a potential future fuel, can be produced from carbon (from coal) and steam by the following reaction: C(s,graphite)+2H2O(g)→2H2(g)+CO2(g) Note that the average bond energy for the breaking of a bond in CO2 is 799 kJ/mol. Use average bond energies to calculate ΔHrxn for this reaction.
Quantitative: In the 1950s liquid hydrogen was considered as a fuel for a new type of aircraft being developed, the SR-71 Blackbird (shown in Figure 1). Figure 1: The SR-71 Blackbird Early research on the project focused on which fuel to use for the Blackbird. Pratt & Whitney had a J-57 engine that was designed for kerosene and being considered for implementation on the Blackbird. The J-57 only took 5 months to convert to running on liquid hydrogen, however tests...
Hydrogen (H) and oxygen (O.) are reacted in a fuel cell to produce energy. The product of the reaction is water, and any excess gases are vented after the fuel cell, as shown in the figure below. The hydrogen and oxygen tanks are maintained at the same temperature and pressure, and they feed at the same volumetric flow rate. The reaction goes to 60% completion in the fuel cell (hydrogen basis) If all of the unreacted hydrogen and a portion...
Some hydrogen fuel cell vehicles fill up at a gas station that uses hydrolysis to produce the hydrogen gas. When hydrogen is combined with oxygen in the fuel cell, energy is released to power the car. The reaction is like hydrolysis in reverse 2H2O (liq.) + energy + 2H2 (gas) + O2 (gas) Pick all statements which are true. Select one or more: O a. hydrogen fuel cells can produce more energy than is used to create the hydrogen by...
15. How is the relationship between fuel cost, speed and power installed determined? Why slow steaming was considered necessary and how is it used for economic performance of a ship?
15. How is the relationship between fuel cost, speed and power installed determined? Why slow steaming was considered necessary and how is it used for economic performance of a ship?
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