BSC CHEMISTRY Lecture Notes - Lecture 2: Wind Farm, Anaerobic Digestion, Tidal Power

19 views7 pages

vr.reshma

19 Mar 2023

School

University of Calicut

Department

Education

Course

EDUCATION

Professor

For unlimited access to Class Notes, a Class+ subscription is required.

Document Summary

Renewable resources are natural resources that cannot be depleted: sun, wind, hydropower, geothermal, tidal and, biomass. It is used to dry food, heat water, generating electricity. Sun provides light for photosynthesis to the plants. Different technologies are developed to collect and convert solar radiation into heat energy that can be used for various purposes. Dis advantage: depend upon the weather condition, seasons, and geographical location, solar panels are very costly, need a lot of open space. Wind energy actually a byproduct of sun. it is a clean, sustainable, renewable energy source that has much smaller impact on the environment. Wind power is one of the lowest priced energy sources available today. Windmills, that are collect and convert kinetic energy to electricity. The largest offshore wind farm in the world is called the walney extensions. This windfarm is located in the irish sea approximately 19 kilometers west of the north west coast of england. Dis advantage: depends on the climatic condition.

Related Questions

What is your personal opinion on renewable energy?what do you think is most feasible for the world?

1. Both the reactant and the product of the reduction reaction are considered renewable materials .... a) Explain the difference of renewable and non-renewable resources, and b) Describe briefly the industrial method of obtaining these substances.

A) Write the names and skeleton formulas of the oxidation products with chromic acid (strong oxidant) of the following substances: a) Oleic acid, b) Hydroquinone, c) Aniline, d) Maleic acid.

B) Write the structures of the substances indicated in the following reactions and calculate the state of their oxidation:

a) Acetaldehyde to fumaric acid

b) Isoborneol to Camphor

3. Write the names and structures of 10 oxidizing agents and 10 reducing agents in organic reactions,

Explain it briefly?

Production from renewable sources Production of H_2 by electrolysis of water is costly and viable only in areas where electricity is cheap or if it is a byproduct of an eco-nomically important process. Environmental pressures are driving technologies to produce H_2 more efficiently from surplus or renewable energy, including solar and biological sources. Electrolysis is used to produce H_2 that is free from contaminants. To drive this reaction, a large overpotential is required to offset the sluggish electrode kinetics, particularly for the production of O_2. The best catalysts are based on platinum, but it is too expensive to justify its use in large-scale plants. As a consequence, electrolysis of water is economical and environmentally benign only if the electrical power stems from cheap, renewable resources or if it is surplus to demand. These conditions are found in countries that have plenty of hydroelectric or nuclear energy. There is also scope for off-shore wind farms that can employ resources far from the electricity grids and are far from the population areas that are otherwise necessary for conventional power generation. Electrolysis is carried out using hundreds of cells arranged in series, each operating at 2 V with iron or nickel electrodes and aqueous NaOH (or an ion-selective membrane) as electro- lyte (Fig. 10.5). Temperatures of 80-85 degree C are used to increase the electrolytic current and to lower the overpotential. The most important electrolytic H_2 production method is the chlor-alkah process (Box 1 1.2), in which H, is produced as a byproduct of NaOH manufacture. In this process the other gaseous product is Cl, which requires a lower overpotential than O_2. As yet, however, only about 0.1 per cent of the global H_2 demand is produced by electrolysis, including that produced in the chlor-alkali process. This percentage could be improved by the development of cheap and efficient clectrocatalysts to reduce the economically wasteful overpotential. Hydrogen can be produced by fermentation, using anaerobic bacteria that use cultivated biomass or biological waste as their energy source (Box 10.1). Research is also under way to establish how best to produce H_2 by exploiting solar energy directly either through physical methods (solar-powered thermolysis or photo)

BSC CHEMISTRY Lecture Notes - Lecture 2: Wind Farm, Anaerobic Digestion, Tidal Power

Document Summary

Get access

Related Documents

EES 0837 Lecture Notes - Lecture 38: Water Cycle, Bioenergy

GEOL 0840 Chapter Notes - Chapter 16: Renewable Energy, Passive Solar Building Design, Net Metering

ID 24011 Chapter Notes - Chapter chapter 1: Solar Water Heating, Passive Solar Building Design, Passive Cooling

Related Questions