Photocatalytic Reduction of Carbon Dioxide

2013 ◽  
Vol 764 ◽  
pp. 83-96 ◽  
Author(s):  
Rakshit Ameta ◽  
Shikha Panchal ◽  
Noopur Ameta ◽  
Suresh C. Ameta
Keyword(s):  
Carbon Dioxide ◽  
Global Warming ◽  
Single Molecule ◽  
Photocatalytic Reduction ◽  
Energy Crisis ◽  
Synthetic Fuels ◽  
Organic Fuels ◽  
Main Culprit ◽  
The Cost ◽  
Alternate Fuels

World is facing problems of global warming as well as energy crisis. Both these problems can be solved to a reasonable extent by photoreduction of carbon dioxide. Here, photocatalysis enters the scene. Photocatalytic reduction to synthetic organic fuels like formaldehyde, methanol, formic acid, acetic acid, methane, etc. will provide a solution to the problem of energy crisis as it will give us alternate fuels, which can be burnt into fuel cells to generate electricity. Once we get electricity at the cost of carbon dioxide, one can convert this form of energy to any other form of energy. Secondly, it will give a solution to put a check on the increasing amount of carbon dioxide, which is the main culprit of global warming. Any conventional fuel on burring will add some molecules of carbon dioxide in the atmosphere, but synthetic fuels derived by photocatalytic reduction of carbon dioxide will not add even a single molecule of carbon dioxide in the environment. It can be considered as a short term loan of carbon dioxide from the atmosphere as the carbon dioxide molecules utilized in the synthesis of alternate fuels are generated back on burning it in fuel cell.

Direct Z-scheme Sn-In2O3/In2S3 heterojunction nanostructures for enhanced photocatalytic CO2 reduction activity

2021 ◽  
Author(s):  
Yinyi Ma ◽  
Zemin Zhang ◽  
Xiao Jiang ◽  
Rongke Sun ◽  
Mingzheng Xie ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Environmental Pollution ◽  
Light Absorption ◽  
Co2 Reduction ◽  
Photocatalytic Reduction ◽  
Practical Significance ◽  
Energy Crisis ◽  
Low Light ◽  
Reduction Activity

Photocatalytic reduction of carbon dioxide into chemical fuels has great practical significance in solving energy crisis and environmental pollution, but remains a big challenge owing to its low light absorption...

Heteroatom-doped C3N as a promising metal-free catalyst for a high-efficiency carbon dioxide reduction reaction

2020 ◽  
Vol 44 (27) ◽  
pp. 11824-11828 ◽  
Author(s):  
Tingting Zhao ◽  
Yu Tian ◽  
Likai Yan ◽  
Zhongmin Su
Keyword(s):  
Carbon Dioxide ◽  
Global Warming ◽  
High Efficiency ◽  
Carbon Dioxide Reduction ◽  
Reduction Reaction ◽  
Energy Crisis ◽  
Metal Free ◽  
Promising Strategy ◽  
Fuels And Chemicals

Converting CO2 into useful fuels and chemicals offers a promising strategy for mitigating the issues of energy crisis and global warming.

scholarly journals Selective visible-light driven highly efficient photocatalytic reduction of CO2 to C2H5OH by two-dimensional Cu2S monolayers

2021 ◽  
Author(s):  
Shiyan Wang ◽  
Xiaowan Bai ◽  
Qiang Li ◽  
Yixin Ouyang ◽  
Li Shi ◽  
...  
Keyword(s):  
Global Warming ◽  
Value Added ◽  
Photocatalytic Reduction ◽  
Energy Crisis ◽  
Two Dimensional ◽  
Promising Strategy ◽  
High Efficient ◽  
Visible Light Driven ◽  
Reduction Of Co2

Solar-driven high-efficient photocatalytic reduction of CO2 into value-added fuel has been regarded as a promising strategy to assuage current global warming and energy crisis, while developing highly product-selective, long-term stable...

Development of proficient photocatalytic systems for enhanced photocatalytic reduction of carbon dioxide

2021 ◽  
Vol 5 (1) ◽  
pp. 12-33
Author(s):  
Mufeedah Muringa Kandy ◽  
Anjana Rajeev K ◽  
Muniyandi Sankaralingam
Keyword(s):  
Carbon Dioxide ◽  
Global Warming ◽  
Photocatalytic Reduction

Global warming due to the unrestricted release of CO2 into the atmosphere is a prevalent challenge faced by the 21st century.

It’s Not My Fault: Global Warming and Individual Moral Obligations

2010 ◽  
Author(s):  
Walter Sinnott-Armstrong
Keyword(s):  
Carbon Dioxide ◽  
Global Warming ◽  
Sea Level ◽  
Fossil Fuels ◽  
Climate Changes ◽  
Heat Waves ◽  
Poor Countries ◽  
Long Run ◽  
Main Culprit ◽  
The Rich

To make the issue stark, let us begin with a few assumptions. I believe that these assumptions are probably roughly accurate, but none is certain, and I will not try to justify them here. Instead, I will simply take them for granted for the sake of argument. First, global warming has begun and is likely to increase over the next century. We cannot be sure exactly how much or how fast, but hot times are coming. Second, a significant amount of global warming is due to human activities. The main culprit is fossil fuels. Third, global warming will create serious problems for many people over the long term by causing climate changes, including violent storms, floods from sea-level rises, droughts, heat waves, and so on. Millions of people will probably be displaced or die. Fourth, the poor will be hurt most of all. The rich countries are causing most of the global warming, but they will be able to adapt to climate changes more easily. Poor countries that are close to sea level might be devastated. Fifth, governments, especially the biggest and richest ones, are able to mitigate global warming They can impose limits on emissions. They can require or give incentives for increased energy efficiency. They can stop deforestation and fund reforestation. They can develop ways to sequester carbon dioxide in oceans or underground. These steps will help, but the only long-run solution lies in alternatives to fossil fuels. These alternatives can be found soon if governments start massive research projects now. Sixth, it is too late to stop global warming. Because there is so much carbon dioxide in the atmosphere already, because carbon dioxide remains in the atmosphere for so long, and because we will remain dependent on fossil fuels in the near future, governments can slow down global warming or reduce its severity, but they cannot prevent it. Hence, governments need to adapt. They need to build sea walls. They need to reinforce houses that cannot withstand storms. They need to move populations from low-lying areas.

scholarly journals Oxygenated Transport Fuels from Carbon Dioxide

2020 ◽  
Author(s):  
Peter Styring ◽  
George RM Dowson
Keyword(s):  
Carbon Dioxide ◽  
Carbon Dioxide Emissions ◽  
Alternative Fuels ◽  
Low Cost ◽  
Rapid Development ◽  
Transport Sector ◽  
Synthetic Fuels ◽  
Fossil Carbon ◽  
Net Zero ◽  
Organic Fuels

The restructuring of the economy post-COVID 19 coupled to the drive towards Net Zero carbon dioxide emissions means we must rethink the way we use transport fuels. Fossil-carbon based fuels are ubiquitous in the transport sector, however there are alternative synthetic fuels that could be used as drop-in or replacement fuels. The main hurdles to achieving a transition to synthetic fuels are the limited availability of low-cost carbon dioxide at an appropriate purity, the availability of renewable hydrogen and, in the case of hydrocarbons, catalysts that are selective for small and particular chain lengths. In this paper we will consider some of the alternative fuels and methods that could reduce cost, both economically and environmentally. We recommend that increased effort in the rapid development of these fuels should be a priority in order to accelerate the possibility of achieving Net Zero without costly infrastructure changes. As ground transportation offers a more straightforward approach legislatively, we will look at oxygenated organic fuels as an alternative drop-in replacement for hydrocarbons.

Combating Global Warming—Reducing CO2 Emissions from Coal-Fired Power Plant

1993 ◽  
Vol 207 (2) ◽  
pp. 81-88 ◽  
Author(s):  
I R Summerfield ◽  
S H Goldthorpe ◽  
C J Bower
Keyword(s):  
Carbon Dioxide ◽  
Global Warming ◽  
Power Plants ◽  
Electricity Cost ◽  
Power Stations ◽  
Energy Penalty ◽  
Reduce Emissions ◽  
Set Up ◽  
The Cost ◽  
Gas Fields

The threat of global warming is sufficient to warrant ‘least regrets’ measures to reduce emissions of greenhouse gases, in particular through increased efficiency in energy production and use. British Coal has set up a programme to contribute to the international responses to the threat. It is concentrating on investigating options for removing carbon dioxide from fossil-fuelled power plants in case expensive fallback options become necessary. Screening of the options commenced with flowsheeting studies which estimated the thermal efficiency of a number of process schemes. These screening studies concluded that carbon dioxide (CO2) control could be retrofitted to existing coal-fired power stations, but that the new generation of gasification-based systems is more promising. CO2 separation could be more easily integrated into advanced power plants as they operate at high pressure, resulting in increased CO2 partial pressure which reduces the energy penalty associated with the separation. The CO2 would need to be exported as a liquid stream for storage in exhausted oil or gas fields. Costs of such power plants and CO2 disposal options have been developed. These studies suggest that, using proven technology, the cost of electricity would rise by about 42 per cent. If novel gas separation systems based on membranes can be developed, the increase in electricity cost could be limited to around 34 per cent. This paper discusses the options and presents the results of costing studies.

Synergistic effect of phosphomolybdic acid on rhodium-based metal-organic frameworks for the efficient selective photocatalytic reduction of CO2 to CO

2021 ◽  
Author(s):  
Yurong Shan ◽  
Dexiang Liu ◽  
Chunyan Xu ◽  
Peng Zhan ◽  
Hui Wang ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Electronic Structure ◽  
Synergistic Effect ◽  
Metal Organic Frameworks ◽  
Phosphomolybdic Acid ◽  
Photocatalytic Reduction ◽  
Structure And Morphology ◽  
Spherical Structure ◽  
Metal Organic ◽  
Reduction Of Co2

In this work, PMA@NH2-MIL-68(Rh) with a mangosteen spherical structure was successfully synthesized by a hydrothermal method for the photocatalytic reduction of carbon dioxide. The electronic structure and morphology of the...

Alkali hexatitanate photocatalysts with various morphologies for selective reduction of carbon dioxide by water

2021 ◽  
Author(s):  
XING· ZHU ◽  
Akira Yamamoto ◽  
Hisao Yoshida
Keyword(s):  
Carbon Dioxide ◽  
Alkali Metal ◽  
Selective Reduction ◽  
Photocatalytic Reduction

Various alkali-metal hexatitanate photocatalysts were examined for photocatalytic reduction of carbon dioxide with water. Four types of alkali-metal hexatitanate samples (A2Ti6O13, A=Na, K, Rb, and Cs) were successfully prepared by...

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