scholarly journals Electrification of a Milstein-type Catalyst for Alcohol Reformation

2022 ◽  
Author(s):  
Niklas von Wolff ◽  
Damien Tocqueville ◽  
Esther Nubret ◽  
Marc Robert ◽  
David Milstein
Keyword(s):  
Organic Chemistry ◽  
Energy Efficiency ◽  
Cyclic Voltammetry ◽  
Energy Input ◽  
Building Blocks ◽  
Increase Energy Efficiency ◽  
Renewable Feedstock ◽  
Fine Tune ◽  
Oxidation Of Ethanol ◽  
The Ideal

Novel energy and atom efficiency processes will be keys to develop the sustainable chemical industry of the future. Electrification could play an important role, by allowing to fine-tune energy input and using the ideal redox agent: the electron. Here we demonstrate that a commercially available Milstein ruthenium cata-lyst (1) can be used to promote the electrochemical oxidation of ethanol to ethyl acetate and acetate, thus demonstrating the four electron oxidation under preparative conditions. Cyclic voltammetry and DFT-calculations are used to devise a possible catalytic cycle based on a thermal chemical step generating the key hydride intermediate. Successful electrification of Milstein-type catalysts opens pathway to use alcohols as renewable feedstock for the generation of esters and other key building blocks in organic chemistry, thus contributing to increase energy efficiency in organic redox chemistry.

Perspectives and Regulation of the Russian Market for Project-based Transactions under the Kyoto Protocol

2008 ◽  
pp. 108-125
Author(s):  
K. Zavodov
Keyword(s):  
Energy Efficiency ◽  
Market Mechanism ◽  
Point Of View ◽  
Market Regulation ◽  
Foreign Investments ◽  
Russian Market ◽  
Increase Energy Efficiency ◽  
New Form ◽  
Contract Structure ◽  
Carbon Fund

Project-based transactions (PBTs) are a market mechanism of attracting foreign investments in order to abate greenhouse gas emissions and increase energy efficiency of the country’s enterprises. The article provides a classification and analyzes advantages and drawbacks of PBTs from the point of view of a host country. The main trends and factors determining the dynamics of the PBT market are described. Given that Russia currently lags behind the leaders of the PBT market, an incorporation of a state carbon fund is put forward with an aim of channelling PBTs through it. This paper proposes a form of PBT market regulation by incorporating an option mechanism into the contract structure of a transaction. A comparison of the new form of regulation with the tools that are currently in use in Russia and other countries demonstrates its greater economic efficiency under uncertainty.

IMPROVEMENT OF ENERGY SAVING AND ENERGY EFFICIENCY IN BUILDINGS AND RESIDENTIAL HOUSES IN THE KYRGYZ REPUBLIC

2019 ◽  
pp. 3-17
Author(s):  
Turatbek Kasymov
Keyword(s):  
Energy Efficiency ◽  
Energy Saving ◽  
Energy System ◽  
Environmental Indicators ◽  
Kyrgyz Republic ◽  
Technical Standards ◽  
Insulating Materials ◽  
Increase Energy Efficiency ◽  
State Construction ◽  
The Government

This article reviews energy consumption in the Kyrgyz Republic economy, environmental indicators and strategies to further develop the national fuel and energy system to ensure energy efficiency and energy saving. An existing situation in energy efficiency of buildings in the country is described. Secondary legislation and by-laws approved by the Government of the Kyrgyz Republic as well as several technical standards, norms, methods and guidelines approved by the order of the State Construction Agency of the Kyrgyz Republic are presented. Applying modern insulating materials are suggested as possible solutions to increase energy efficiency and energy saving. The advantages of EPS-beton in comparison with other thermal insulation materials are discussed and foreign experience of use of EPS-beton products in increasing energy efficiency of buildings is presented.

scholarly journals Refrigeration of COVID-19 Vaccines: Ideal Storage Characteristics, Energy Efficiency and Environmental Impacts of Various Vaccine Options

Energies ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1849
Author(s):  
Alexandre F. Santos ◽  
Pedro D. Gaspar ◽  
Heraldo J. L. de Souza
Keyword(s):  
Energy Efficiency ◽  
Environmental Impacts ◽  
Thermal Load ◽  
Storage Condition ◽  
Storage Conditions ◽  
Energy Simulation ◽  
Energy Usage ◽  
Impact Simulation ◽  
Storage Characteristics ◽  
The Ideal

This article considers the ideal storage conditions for multiple vaccine brands, such as Pfizer, Moderna, CoronaVac, Oxford–AstraZeneca, Janssen COVID-19 and Sputnik V. Refrigerant fluid options for each storage condition, thermal load to cool each type of vaccine and environmental impacts of refrigerants are compared. An energy simulation using the EUED (energy usage effectiveness design) index was developed. The Oxford–AstraZeneca, Janssen COVID-19 and CoronaVac vaccines show 9.34-times higher energy efficiency than Pfizer. In addition, a TEWI (total equivalent warming impact) simulation was developed that prioritizes direct environmental impacts and indirect in refrigeration. From this analysis, it is concluded that the cold storage of Oxford–AstraZeneca, Janssen COVID-19 and CoronaVac vaccines in Brazil generates 35-times less environmental impact than the Pfizer vaccine.

scholarly journals A review of challenges and benefits of integration of CHP plant into the grid: a case study in Serbia

2021 ◽  
Author(s):  
Rade M. Ciric ◽  
Sasa N. Mandic
Keyword(s):  
Energy Efficiency ◽  
Negative Impact ◽  
Renewable Energy Sources ◽  
Increase Energy Efficiency ◽  
High Voltage Supply ◽  
The Republic ◽  
Technical Solutions ◽  
The Impact

AbstractThe Republic of Serbia must make significant efforts to promote and exploit renewable energy sources and increase energy efficiency in all energy sectors to ensure energy security and economic competitiveness, reduce the negative impact on the environment from energy production and use, and contribute to global efforts to reduce greenhouse gases. Within the paper several issues of integration of recently realized CHP plant are introduced and discussed. Firstly, the legal and energy policy issues in the Republic of Serbia regarding connecting CHP to the grid are presented. The challenges and technical solutions for CHP connection to the grid, as well as power quality issues and the role of the CHP plant during the restoration of power supply during the maintenance of the substation and unplanned loss of high voltage supply, are presented and discussed. Finally, the impact of prospective massive integration of CHP on the energy balance and CO2 emission reduction in the province of Vojvodina in Serbia is investigated and discussed. Since it is the first CHP plant realized in Serbia, it is crucial that experience be shared to all potential stakeholders in the future energy efficiency projects.

scholarly journals Cellulose recycling as a source of raw chirality

2013 ◽  
Vol 85 (8) ◽  
pp. 1683-1692 ◽  
Author(s):  
Valeria Corne ◽  
María Celeste Botta ◽  
Enrique D. V. Giordano ◽  
Germán F. Giri ◽  
David F. Llompart ◽  
...  
Keyword(s):  
Organic Chemistry ◽  
Organic Carbon ◽  
Asymmetric Synthesis ◽  
Building Blocks ◽  
Biologically Active ◽  
Raw Material ◽  
Chiral Auxiliaries ◽  
High Chemical ◽  
Chiral Structure

Modern organic chemistry requires easily obtainable chiral building blocks that show high chemical versatility for their application in the synthesis of enantiopure compounds. Biomass has been demonstrated to be a widely available raw material that represents the only abundant source of renewable organic carbon. Through the pyrolitic conversion of cellulose or cellulose-containing materials it is possible to produce levoglucosenone, a highly functionalized chiral structure. This compound has been innovatively used as a template for the synthesis of key intermediates of biologically active products and for the preparation of chiral auxiliaries, catalysts, and organocatalysts for their application in asymmetric synthesis.

scholarly journals Comparison of energy inputs and energy efficiency for maize in a long-term tillage experiment under Pannonian climate conditions

2021 ◽  
Vol 67 (No. 5) ◽  
pp. 45-52
Author(s):  
Gerhard Moitzi ◽  
Reinhard W. Neugschwandtner ◽  
Hans-Peter Kaul ◽  
Helmut Wagentristl
Keyword(s):  
Energy Efficiency ◽  
Total Energy ◽  
Fuel Consumption ◽  
Crop Production ◽  
Energy Input ◽  
Conservation Tillage ◽  
Energy Output ◽  
No Tillage ◽  
Tillage Systems ◽  
Total Energy Input

Sustainable crop production requires an efficient usage of fossil energy. This six-year study on a silt loam soil (chernozem) analysed the energy efficiency of four tillage systems (mouldboard plough 25–30 cm, deep conservation tillage 35 cm, shallow conservation tillage 8–10 cm, no-tillage). Fuel consumption, total energy input (made up of both direct and indirect input), grain of maize yield, energy output, net-energy output, energy intensity and energy use efficiency were considered. The input rates of fertiliser, herbicides and seeds were set constant; measured values of fuel consumption were used for all tillage operations. Total fuel consumption for maize (Zea mays L.) production was 81.6, 81.5, 69.5 and 53.2 L/ha for the four tillage systems. Between 60% and 64% of the total energy input (17.0–17.4 GJ/ha) was indirect energy (seeds, fertiliser, herbicides, machinery). The share of fertiliser energy of the total energy input was 36% on average across all tillage treatments. Grain drying was the second highest energy consumer with about 22%. Grain yield and energy output were mainly determined by the year. The tillage effect on yield and energy efficiency was smaller than the growing year effect. Over all six years, maize produced in the no-tillage system reached the highest energy efficiency.  

scholarly journals EFFICIENCY INCREASE IN THE ENERGY SAVING PROGRAM IN RUSSIA

2021 ◽  
pp. 133-143
Author(s):  
Анатолий Петрович Дзюба
Keyword(s):  
Energy Efficiency ◽  
Electricity Consumption ◽  
Russian Regions ◽  
Total Contribution ◽  
Improve Energy Efficiency ◽  
Increase Energy Efficiency ◽  
Russian Economy ◽  
Regional Group ◽  
Efficiency Increase ◽  
Federal Districts

Цель статьи - представить разработанную автором методику ранжирования регионов России по уровню общего вклада в реализацию комплекса мер в энергосбережение и повышение энергетической эффективности экономики России. Автором проведено эмпирическое исследование промежуточных результатов реализации мер по повышению энергетической эффективности в России за период 2010-2019 гг. Выполнено исследование направления и динамики изменения потребления электроэнергии за исследуемый период на уровне федеральных округов и регионов России. Научная новизна заключается в выполнении ранжирования регионов, либо территориальных образований по уровню общего вклада каждого региона на основе разработанных показателей. Такое ранжирование выполнено и относительно роста спроса и общего вклада регионов в электропотребление на уровне общего экономического пространства. На основе полученных результатов автором проведена группировка регионов с целью предоставления рекомендаций для каждой региональной группы, направленных на повышение энергетической эффективности в масштабах экономики России. The article is devoted to the description of the methodology developed by the author for ranking Russian regions according to the level of total contribution to the implementation of a set of measures in energy conservation and increasing the energy efficiency of the Russian economy. The author conducts an empirical study of the intermediate results of the implementation of measures to increase energy efficiency in Russia for the period 2010-2019. The study analyzes the direction and dynamics of changes in electricity consumption for the period under study at the level of federal districts and regions of Russia. On the basis of the ranking results obtained, the author has grouped the regions with recommendations for each regional group according to the need to improve energy efficiency on the scale of the Russian economy.

scholarly journals Optimization of furnace for agricultural biomass combustion in order to increase energy efficiency and reducing environmental pollution

2016 ◽  
Vol 42 (4) ◽  
pp. 187-196
Author(s):  
Dejan Đurović ◽  
Dragoljub Dakić ◽  
Branislav Repić ◽  
Goran Živković ◽  
Milica Mladenović
Keyword(s):  
Energy Efficiency ◽  
Environmental Pollution ◽  
Biomass Combustion ◽  
Agricultural Biomass ◽  
Increase Energy Efficiency

scholarly journals Electrochemical analysis of water and suds by impedance spectroscopy and cyclic voltammetry

2014 ◽  
Vol 3 (2) ◽  
pp. 133-140 ◽  
Author(s):  
R. Gruden ◽  
A. Buchholz ◽  
O. Kanoun
Keyword(s):  
Water Quality ◽  
Cyclic Voltammetry ◽  
Impedance Spectroscopy ◽  
Electrochemical Analysis ◽  
Total Hardness ◽  
Impedance Measurements ◽  
Washing Process ◽  
Calcium Magnesium ◽  
The Ideal

Abstract. Optimum detergent dosage during a washing process depends on water quality, degree of pollution and quantity of laundry. Particularly, water quality is an important factor. Other parameters like carbonate- or non-carbonate hardness and calcium / magnesium (Ca / Mg) ratio in addition to total hardness of water have an impact on the amount of detergent. This work discusses the possibilities realizing a detergent sensor that measures important parameters for the washing process and assess the ideal necessary amount of detergent during the washing process. The approach is to combine impedance spectroscopy with cyclic voltammetry in order to determine both water quality and concentration of detergent in the suds which build up the basis for an optimum detergent dosage. The results of cyclic voltammetry show that it is possible to identify the Ca / Mg ratio and the carbonate hardness separately, which is necessary for the optimization of the washing process. Impedance measurements identify total hardness and detergent concentrations.

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