Hydrogen fuel cell benefits and limitations essay

Obtaining volumes of oxygen by this method is still under research to establish a viable method of generating it domestically at a relatively low cost. Membranes that are part of the hydrogen fuel cell has to stand degrees Celsius and still function at sub-zero temperatures.

In this type of fuel cell, the membrane must be hydrated, requiring water to be evaporated at precisely the same rate that it is produced.

Hydrogen Fuel Cell Benefits and Limitations Essay Sample

Though the sun has a greater percentage of hydrogen gas, the gas is too light that it virtually disappears from the surface of the earth when conveyed by the sun rays.

This ideally means that you need less hydrogen to complete an enormous task. When compressed usually to a pressure of about pounds per square inchit must be stored in special high-pressure containers. There have been major reviews of the scientific literature that found no link between nitrates or nitrites and human cancers, or even evidence to suggest that they may be carcinogenic.

Alkaline fuel cell and Alkaline anion exchange membrane fuel cells The alkaline fuel cell or hydrogen-oxygen fuel cell was designed and first demonstrated publicly by Francis Thomas Bacon in The Nitrate and Nitrite Myth: A reformer is a device that removes the hydrogen from hydrocarbon fuels, like methanol or gasoline.

Fuel Storage There are a number of ways that hydrogen can be provided to the fuel cell. The catalyst is rough and porous so that the maximum surface area of the platinum can be exposed to the hydrogen or oxygen.

It was used as a primary source of electrical energy in the Apollo space program. It conducts the electrons that are freed from the hydrogen molecules so that they can be used in an external circuit.

The Nitrate and Nitrite Myth: Another Reason Not To Fear Bacon

They are therefore ideally suited for use within buildings such as hospitals. A lot of research and innovation is required to discover cheap and sustainable ways to harness this form of energy. Hydrogen has some limitations that make it impractical for use in most applications.

The lower operating temperature allows them to use stainless steel instead of ceramic as the cell substrate, which reduces cost and start-up time of the system.

Fuel Cell Cars

This would require massive capital outlay. A great benefit of using Hydrogen fuel cells is that they give off no pollution, and in fact produce pure water as a byproduct.

No reason to buy nitrate-free, uncured bacon. Most fuel cells operate silently, compared to internal combustion engines. The use of stationary fuel cells to generate power at the point of use allows for a decentralised power grid that is potentially more stable.

The hydrogen atom is made up of a single proton and a single electron. Compared to gas, hydrogen lacks smell, which makes any leak detection almost impossible. This specially treated material, which looks something like ordinary kitchen plastic wrap, only conducts positively charged ions.

Approximate estimation of the fuel-cell car efficiency is 64 percent. The main challenge of MCFC technology is the cells' short life span. Researchers are addressing this problem by exploring corrosion-resistant materials for components as well as fuel cell designs that may increase cell life without decreasing performance.

Many pieces of a fuel cell are costly. If the water is evaporated too slowly, the electrodes will flood, preventing the reactants from reaching the catalyst and stopping the reaction. If water is evaporated too quickly, the membrane dries, resistance across it increases, and eventually it will crack, creating a gas "short circuit" where hydrogen and oxygen combine directly, generating heat that will damage the fuel cell.

It may shock you to learn that one serving of arugula, two servings of butter lettuce, and four servings of celery or beets all have more nitrite than hot dogs. Hydrogen exists in almost all plant matter and also occurs naturally in water. Watch this video clip to see Steven Colbert explain how the coming bacon shortage will prolong our lives thanks to reduced nitrates in our diets.

If the hydrogen comes from the electrolysis of water driven by renewable energy, then using fuel cells eliminates greenhouse gases over the whole cycle. Fuel cell vehicles turn hydrogen fuel and oxygen into electricity.

The electricity then powers an electric motor, just like electricity from batteries powers the motor of an electric vehicle. Fuel cells combine oxygen from the air with hydrogen from the vehicle's fuel tank to produce electricity. Beyond just being loaded with “artery-clogging saturated fat” and sodium, bacon has been long considered unhealthy due to the use of nitrates and nitrites in the curing process.

Many conventional doctors, and well-meaning friends and relatives, will say you’re basically asking for a heart attack or cancer by eating the food many Paleo enthusiasts. Hydrogen fuel cell vehicles, which use electric motors, are much more energy efficient and use percent of membrane to the other side of the cell, the stream of negatively-charged electrons follows an external circuit to the cathode.

This flow of electrons is electricity that can be. Fuel cells can eliminate pollution caused by burning fossil fuels; for hydrogen fuelled fuel cells, the only by-product at point of use is water. If the hydrogen comes from the electrolysis of water driven by renewable energy, then using fuel cells eliminates greenhouse gases over the whole cycle.

The solid oxide fuel cell is composed of all solid components with the electrolyte acting as an oxide ion conductor and operating at high temperature (~℃) in order to ensure adequate ionic and electronic conductivity for the cell components[5].

A fuel cell is an electrochemical cell that converts the chemical energy from a fuel into electricity through an electrochemical reaction of hydrogen fuel with oxygen or another oxidizing agent.

Hydrogen fuel cell benefits and limitations essay
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Fuel cell - Wikipedia