carbon neutral
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Energies ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 618
Author(s):  
Emanuela Marzi ◽  
Mirko Morini ◽  
Agostino Gambarotta

Europe stated the ambitious target of becoming carbon neutral by 2050 to combat climate change and meet the requirements imposed by the Paris Agreement, and renewable energy has proved to be a promising solution for the decarbonization of many sectors. Nonetheless, their aleatory nature leads to grid unbalances due to the difference between supply and demand. Storage solutions are needed, and electrofuels become a key factor in this context: they are fuels produced from electricity, which leads to carbon-neutral fuels if it originates from renewable sources. These can constitute a key solution to store the surplus energy and to decarbonize the so-called hard-to-abate sectors. Electrofuel production technologies have not yet been fully developed, and, in this context, extensive study of the state-of-the-art of existing projects can be very useful for researchers and developers. This work researches the European projects funded by the Horizon 2020 Programme regarding electrofuel production. The projects were analyzed in-depth using specific features, and the results were presented.


Energies ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 531
Author(s):  
Jingna Kou ◽  
Fengjun Sun ◽  
Wei Li ◽  
Jie Jin

There is a global move toward being “carbon neutral”. Reducing the use of coal to generate power has become an inevitable choice for many countries when transforming their energy structures. Many countries have proposed phasing out coal. China is a major energy producing and consuming country and intends to reach a carbon peak by 2030 and become carbon neutral by 2060. China has repeatedly emphasized coal reduction, but has not explicitly proposed phasing out coal, due to the influence of local governments, coal-related enterprises, and the public. This paper explores whether China could declare a “coal phase-out”, and the possible reasons for doing so, by constructing an evolutionary game model with two correlations. MATLAB was used to simulate the model results to determine the effectiveness of the fractal results of the model, and the entropy method was used to calculate the development level of “coal phase-out” related indicators in China and Germany. The results show that: (1) The government can phase out coal only when coal-related enterprises and the public can benefit from reducing coal production and consumption. In addition, these benefits are needed to ensure stable economic and social development without affecting people’s daily lives; (2) The development level of relevant indicators of “coal retreat” in China is lower than that in Germany. Based on these results, it is concluded that it is difficult for China to announce a “coal phase-out” at present. Faced with this reality, China should improve the efficiency of coal use, install carbon capture and storage facilities, vigorously develop renewable energy and reduce the share of coal in the energy system.


Forests ◽  
2022 ◽  
Vol 13 (1) ◽  
pp. 70
Author(s):  
Joshua P. Weyrens ◽  
Obste Therasme ◽  
René H. Germain

Forests are used to mitigate anthropogenic greenhouse gas (GHG) emissions through carbon offset programs, and forest management is generally accepted as “carbon neutral”. However, forest harvesting operations depend heavily on fossil fuels, so it would be remiss to broadly paint all forms of management as carbon neutral without empirical verification of this claim. Biomass feedstock, as a means to supplant fossil fuel consumption, has received the bulk of investigative efforts, as the carbon benefit of biomass is one of the most contentious among wood products, because it does not create long-term carbon storage. A life cycle assessment (LCA) was conducted on a winter shelterwood harvest occurring in the Adirondacks of upstate New York. Primary data were collected daily throughout the operation and used to model the impact attributed to producing clean chips and logs for delivery to a pulp mill and sawmill, respectively. This harvest produced 4894 Mg of clean chips and 527 Mg of sawtimber. We calculated that 39.77 and 25.16 kg of carbon dioxide equivalent were emitted per Mg of clean chips and sawtimber, respectively, with a total observed flow of GHG into the atmosphere between 206 and 210 thousand kilograms. The results contribute to our understanding of the global warming potential of implementing a forest harvest to produce raw materials for medium- and long-term carbon storage products such as paper and dimensional hardwood lumber.


Author(s):  
Lucas Garcia Verga ◽  
Paulo C. D. Mendes ◽  
Vivianne K. Ocampo-Restrepo ◽  
Juarez L. F. Da Silva

The electrochemical reduction of CO2 is a promising technology to reach a carbon-neutral economy. However, among other challenges, the design of active and selective catalysts still bottlenecks such advances. Herein,...


Author(s):  
Xiaohui Zhong ◽  
Zuqi Zhong ◽  
Shujie Liang ◽  
Gongchang Zeng ◽  
Shuang Cheng ◽  
...  

Electrochemical CO2 reduction reaction (CO2RR) to HCOOH offers a promising strategy for the carbon-neutral cycle. Sn-based materials have been demonstrated for extensive studies of CO2RR to HCOOH, but great challenges...


Energy ◽  
2022 ◽  
Vol 239 ◽  
pp. 121863
Author(s):  
Jian Yao ◽  
Pengbo Dou ◽  
Sihang Zheng ◽  
Yao Zhao ◽  
Yanjun Dai ◽  
...  

Author(s):  
Qunli Zhang ◽  
Yixiong Yang ◽  
Xinchao Zhang ◽  
Fang Liu ◽  
Gang Wang

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