Thermo-photo catalytic CO2 hydrogenation over Ru/TiO2

2020 ◽  
Vol 8 (15) ◽  
pp. 7390-7394 ◽  
Author(s):  
Chunling Wang ◽  
Siyuan Fang ◽  
Songhai Xie ◽  
Ying Zheng ◽  
Yun Hang Hu
Keyword(s):  
Solar Energy ◽  
Greenhouse Gas ◽  
Co2 Hydrogenation ◽  
Valuable Compounds

It is attractive to convert CO2 greenhouse gas into valuable compounds via photocatalysis with solar energy.

scholarly journals Solar energy policy to boost Brazilian power sector

2020 ◽  
Vol 12 (3) ◽  
pp. 349-367
Author(s):  
Juliana Pacheco Barbosa ◽  
Joisa Dutra Saraiva ◽  
Julia Seixas
Keyword(s):  
Climate Change ◽  
Solar Energy ◽  
Power System ◽  
Greenhouse Gas Emissions ◽  
Greenhouse Gas ◽  
Energy Policy ◽  
Power Sector ◽  
Gas Emissions ◽  
Incentive Mechanisms ◽  
Content Type

Purpose The purpose of this paper is to highlight the opportunity for the energy policy in Brazil to tackle the very high cost-effectiveness potencial of solar energy to the power system. Three mechanisms to achieve ambitious reductions in the greenhouse gas emissions from the power sector by 2030 and 2040 are assessed wherein treated as solar targets under ambitious reductions in the greenhouse gas emissions from the power sector. Then, three mechanisms to achieve these selected solar targets are suggested. Design/methodology/approach This paper reviews current and future incentive mechanisms to promote solar energy. An integrated energy system optimization model shows the most cost-efficient deployment level. Incentive mechanisms can promote renewable sources, aiming to tackle climate change and ensuring energy security, while taking advantage of endogenous energy resources potential. Based on a literature review, as well as on the specific characteristics of the Brazilian power system, under restrictions for the expansion of hydroelectricity and ambitious limitation in the emissions of greenhouse gases from the power sector. Findings The potential unexploited of solar energy is huge but it needs the appropriate incentive mechanism to be deployed. These mechanisms would be more effective if they have a specific technological and temporal focus. The solar energy deployment in large scale is important to the mitigation of climate change. Originality/value The value of the research is twofold: estimations of the cost-effective potential of solar technologies, generated from an integrated optimization energy model, fully calibrated for the Brazilian power system, while tacking the increasing electricity demand, the expected reduction of greenhouse gas emissions and the need to increase the access to clean and affordable energy, up to 2040; proposals of three mechanisms to deploy centralized PV, distributed PV and solar thermal power, taking the best experiences in several countries and the recent Brazilian cases.

scholarly journals Ratepayer Perspectives on Mid- to Large-Scale Solar Development on Long Island, NY: Lessons for Reducing Siting Conflict through Supported Development Types

Energies ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 5628
Author(s):  
Chelsea Schelly ◽  
Emily Prehoda ◽  
Jessica Price ◽  
Aimee Delach ◽  
Rupak Thapaliya
Keyword(s):  
New York ◽  
Solar Energy ◽  
Greenhouse Gas Emissions ◽  
Greenhouse Gas ◽  
Large Scale ◽  
Financial Models ◽  
Long Island ◽  
Community Support ◽  
Gas Emissions ◽  
Solar Systems

The state of New York has ambitious mandates for reducing greenhouse gas emissions and increasing renewable energy generation. Solar energy will play an important role in reducing greenhouse gas emissions from the electric energy sector. Concerns over solar installations’ impacts to host communities and the environment have led to growing conflicts over solar energy siting on Long Island, in other parts of New York, and throughout the US. Understanding community members’ perspectives is critical for reducing conflict. Solar energy can be deployed more quickly and at lower cost if projects are structured to address the concerns and meet the needs of the community. This paper presents the results of a survey of residential utility ratepayers that examined their perceptions, preferences, and priorities concerning mid- to large-scale solar development on Long Island (250 kW and larger). The survey asked respondents to consider specific installation types, financial models, and other aspects of solar development. Results indicate that respondents were overwhelmingly supportive of mid- to large-scale solar development in their communities. The most highly supported development types were solar systems on rooftops and solar systems that are co-located with other land uses (mixed use) at a particular site, such as parking canopies, landfills, or integration with agriculture. The most highly supported financial models included privately funded projects by local developers and community solar projects. The largest concern about solar development expressed by respondents did not involve tree removal or visibility (as initially hypothesized to be the most significant considerations) but rather the fairness of the distribution of economic benefits associated with solar development. This paper provides concrete insight into particular models of solar development that may invoke less conflict and more community support.

scholarly journals Photocatalytic Methane Reforming: Recent Advances

Catalysts ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 18
Author(s):  
Yohei Cho ◽  
Akira Yamaguchi ◽  
Masahiro Miyauchi
Keyword(s):  
Greenhouse Gas ◽  
The Other ◽  
Methane Reforming ◽  
Reaction Selectivity ◽  
Recent Advances ◽  
Other Hand ◽  
Dark Conditions ◽  
Catalyst Systems ◽  
Valuable Compounds

Methane reforming is an important potential technology for solving both environmental and energy problems. This technology is important because methane is counted as a greenhouse gas, but on the other hand, it can be reformed into industrially valuable compounds. More research has focused on photocatalytic methane reforming, which has a higher activity than thermal catalysts under dark conditions. The reaction selectivity toward specific products in photocatalytic methane reforming is sometimes different from thermal catalyst systems. Herein, we discuss recent advances in photocatalytic methane reforming to provide various strategies for reforming.

scholarly journals Techno-Economic Investigation of Using Solar Energy for Heating Swimming Pools in Buildings and Producing Hydrogen: A Case Study

2021 ◽  
Vol 9 ◽  
Author(s):  
Khalid Almutairi ◽  
Ali Mostafaeipour ◽  
Negin Baghaei ◽  
Kuaanan Techato ◽  
Shahariar Chowdhury ◽  
...  
Keyword(s):  
Solar Energy ◽  
Greenhouse Gas Emissions ◽  
Greenhouse Gas ◽  
Glass Tube ◽  
Photovoltaic System ◽  
Gas Emissions ◽  
Financial Outcomes ◽  
Performance Rate

Solar energy is a free and environmentally friendly supply of power that has negligible impact on the environment, and it has long been used by humans through different methods. However, solar energy technology would use for heating water for buildings as an alternative resource, which would help reduce CO2 reduction and safe environment. A data analysis was performed using the RETScreen software, and the financial outcomes that were calculated using two methods. Clearly, the software is operational with two different methods. Both methods indicate that this project is economically feasible. The aim of this study is to evaluate the utilization of solar energy for household and commercial purposes. The first goal is to explore the technical, economic, and environmental aspects of using evacuated glass tube solar collectors to heat water in an indoor pool in the building, having an area of 50 m2, in the city of Yazd, Iran. The second goal is to evaluate the amount of hydrogen that can be obtained from the installation photovoltaic systems in the province. The results also show that this project will decrease greenhouse gas emissions by 142 ton-CO2 over 20 years of the useful life of a collector, thereby indicating the possible significant role of such collectors in the reduction of greenhouse gas emissions. Furthermore, the findings indicate that installing a single X21-345 photovoltaic system with a performance rate of 20% can result in the production of 2.1 kg of hydrogen annually.

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