scholarly journals Mechanical Properties and Microstructure of Low Carbon Binders Manufactured from Calcined Canal Sediments and Ground Granulated Blast Furnace Slag (GGBS)

2021 ◽  
Vol 13 (16) ◽  
pp. 9057
Author(s):  
Rachid Hadj Sadok ◽  
Walid Maherzi ◽  
Mahfoud Benzerzour ◽  
Richard Lord ◽  
Keith Torrance ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Greenhouse Gas Emissions ◽  
Greenhouse Gas ◽  
Linear Increase ◽  
High Reactivity ◽  
Cement Industry ◽  
Partial Substitution ◽  
Low Carbon ◽  
Gas Emissions ◽  
Pozzolanic Material

This research study evaluated the effects of adding Scottish canal sediment after calcination at 750 °C in combination with GGBS on hydration, strength and microstructural properties in ternary cement mixtures in order to reduce their carbon footprint (CO2) and cost. A series of physico-chemical, hydration heat, mechanic performance, mercury porosity and microstructure tests or observations was performed in order to evaluate the fresh and hardened properties. The physical and chemical characterisation of the calcined sediments revealed good pozzolanic properties that could be valorised as a potential co-product in the cement industry. The results obtained for mortars with various percentages of calcined sediment confirmed that this represents a previously unrecognised potential source of high reactivity pozzolanic materials. The evolution of the compressive strength for the different types of mortars based on the partial substitution of cement by slag and calcined sediments showed a linear increase in compressive strength for 90 days. The best compressive strengths and porosity were observed in mortars composed of 50% cement, 40% slag and 10% calcined sediment (CSS10%) after 90 days. In conclusion, the addition of calcined canal sediments as an artificial pozzolanic material could improve strength and save significant amounts of energy or greenhouse gas emissions, while potentially contributing to Scotland’s ambitious 2045 net zero target and reducing greenhouse gas emissions by 2050 in the UK and Europe.

Low-Carbon Russia: Prospects after the Crisis

2009 ◽  
pp. 107-120 ◽  
Author(s):  
I. Bashmakov
Keyword(s):  
Economic Growth ◽  
Potential Energy ◽  
Greenhouse Gas Emissions ◽  
Greenhouse Gas ◽  
Low Carbon ◽  
Modeling Tools ◽  
Gas Emissions ◽  
Scenario Approach

On the eve of the worldwide negotiations of a new climate agreement in December 2009 in Copenhagen it is important to clearly understand what Russia can do to mitigate energy-related greenhouse gas emissions in the medium (until 2020) and in the long term (until 2050). The paper investigates this issue using modeling tools and scenario approach. It concludes that transition to the "Low-Carbon Russia" scenarios must be accomplished in 2020—2030 or sooner, not only to mitigate emissions, but to block potential energy shortages and its costliness which can hinder economic growth.

scholarly journals Prospects for land-use sustainability on the agricultural frontier of the Brazilian Amazon

2013 ◽  
Vol 368 (1619) ◽  
pp. 20120171 ◽  
Author(s):  
Gillian L. Galford ◽  
Britaldo Soares-Filho ◽  
Carlos E. P. Cerri
Keyword(s):  
Land Use ◽  
Greenhouse Gas Emissions ◽  
Greenhouse Gas ◽  
State Government ◽  
Environmental Sustainability ◽  
Forest Restoration ◽  
Brazilian Amazon ◽  
Low Carbon ◽  
Gas Emissions ◽  
Non Governmental Organizations

The Brazilian Amazon frontier shows how remarkable leadership can work towards increased agricultural productivity and environmental sustainability without new greenhouse gas emissions. This is due to initiatives among various stakeholders, including national and state government and agents, farmers, consumers, funding agencies and non-governmental organizations. Change has come both from bottom-up and top-down actions of these stakeholders, providing leadership, financing and monitoring to foster environmental sustainability and agricultural growth. Goals to reduce greenhouse gas emissions from land-cover and land-use change in Brazil are being achieved through a multi-tiered approach that includes policies to reduce deforestation and initiatives for forest restoration, as well as increased and diversified agricultural production, intensified ranching and innovations in agricultural management. Here, we address opportunities for the Brazilian Amazon in working towards low-carbon rural development and environmentally sustainable landscapes.

scholarly journals Carbon Emissions Constrained Energy Planning for Aluminum Products

Energies ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2753
Author(s):  
Rok Gomilšek ◽  
Lidija Čuček ◽  
Marko Homšak ◽  
Raymond R. Tan ◽  
Zdravko Kravanja
Keyword(s):  
Energy Source ◽  
Greenhouse Gas Emissions ◽  
Greenhouse Gas ◽  
Co2 Emissions ◽  
Carbon Emissions ◽  
Electricity Consumption ◽  
Primary Aluminum ◽  
Energy Planning ◽  
Low Carbon ◽  
Gas Emissions

The production of primary aluminum is an energy-intensive industry which produces large amounts of direct and indirect greenhouse gas emissions, especially from electricity consumption. Carbon Emissions Constrained Energy Planning proved to be an efficient tool for reducing energy-related greenhouse gas emissions. This study focuses on energy planning constrained by CO2 emissions and determines the required amount of CO2 emissions from electricity sources in order to meet specified CO2 emission benchmark. The study is demonstrated on and applied to specific aluminum products, aluminum slugs and aluminum evaporator panels. Three different approaches of energy planning are considered: (i) an insight-based, graphical targeting approach, (ii) an algebraic targeting approach of cascade analysis, and (iii) an optimization-based approach, using a transportation model. The results of the three approaches show that approximately 2.15 MWh of fossil energy source should be replaced with a zero-carbon or 2.22 MWh with a low-carbon energy source to satisfy the benchmark of CO2 emissions to produce 1 t of aluminum slug; however, this substitution results in higher costs. This study is the first of its kind demonstrated on and applied to specific aluminum products, and represents a step forward in the development of more sustainable practices in this field.

scholarly journals Uncertainty Analysis of Life Cycle Greenhouse Gas Emissions from Petroleum-Based Fuels and Impacts on Low Carbon Fuel Policies

2011 ◽  
Vol 45 (1) ◽  
pp. 125-131 ◽  
Author(s):  
Aranya Venkatesh ◽  
Paulina Jaramillo ◽  
W. Michael Griffin ◽  
H. Scott Matthews
Keyword(s):  
Life Cycle ◽  
Uncertainty Analysis ◽  
Greenhouse Gas Emissions ◽  
Greenhouse Gas ◽  
Low Carbon ◽  
Gas Emissions

EU low carbon roadmap 2050: Potentials and costs for mitigation of non-CO2 greenhouse gas emissions

2012 ◽  
Vol 1 (2) ◽  
pp. 97-108 ◽  
Author(s):  
Lena Höglund-Isaksson ◽  
Wilfried Winiwarter ◽  
Pallav Purohit ◽  
Peter Rafaj ◽  
Wolfgang Schöpp ◽  
...  
Keyword(s):  
Greenhouse Gas Emissions ◽  
Greenhouse Gas ◽  
Low Carbon ◽  
Gas Emissions

Greenhouse-gas emissions from stockpiled and composted dairy-manure residues and consideration of associated emission factors

2016 ◽  
Vol 56 (9) ◽  
pp. 1432 ◽  
Author(s):  
J. Biala ◽  
N. Lovrick ◽  
D. Rowlings ◽  
P. Grace
Keyword(s):  
Greenhouse Gas Emissions ◽  
Greenhouse Gas ◽  
Emission Factors ◽  
Dairy Manure ◽  
Manure Management ◽  
N2o Emissions ◽  
Emission Rates ◽  
Low Carbon ◽  
Gas Emissions ◽  
Chicken Litter

Emissions from stockpiled pond sludge and yard scrapings were compared with composted dairy-manure residues blended with shredded vegetation residues and chicken litter over a 5-month period at a farm in Victoria (Australia). Results showed that methane emissions occurred primarily during the first 30–60 days of stockpiling and composting, with daily emission rates being highest for stockpiled pond sludge. Cumulated methane (CH4) emissions per tonne wet feedstock were highest for stockpiling of pond sludge (969 g CH4/t), followed by composting (682 g CH4/t) and stockpiling of yard scrapings (120 g CH4/t). Sizeable nitrous oxide (N2O) fluxes were observed only when temperatures inside the compost windrow fell below ~45−50°C. Cumulated N2O emissions were highest for composting (159 g N2O/t), followed by stockpiling of pond sludge (103 g N2O/t) and yard scrapings (45 g N2O/t). Adding chicken litter and lime to dairy-manure residues resulted in a very low carbon-to-nitrogen ratio (13 : 1) of the composting mix, and would have brought about significant N2O losses during composting. These field observations suggested that decisions at composting operations, as in many other businesses, are driven more by practical and economic considerations rather than efforts to minimise greenhouse-gas emissions. Total greenhouse-gas emissions (CH4 + N2O), expressed as CO2-e per tonne wet feedstock, were highest for composting (64.4 kg), followed by those for stockpiling of pond sludge (54.5 kg) and yard scraping (16.3 kg). This meant that emissions for composting and stockpiling of pond sludge exceeded the new Australian default emission factors for ‘waste composting’ (49 kg). This paper proposes to express greenhouse-gas emissions from secondary manure-management systems (e.g. composting) also as emissions per tonne wet feedstock, so as to align them with the approach taken for ‘waste composting’ and to facilitate the development of emission-reduction methodologies for improved manure management at the farm level.

scholarly journals Comprehensive approach to the strategy of low-carbon socio-economic development of Russia

Georesursy ◽  
2021 ◽  
Vol 23 (3) ◽  
pp. 3-7 ◽  
Author(s):  
B. Porfiriev ◽  
A. Shirov ◽  
A. Kolpakov
Keyword(s):  
Economic Growth ◽  
Economic Development ◽  
Greenhouse Gas Emissions ◽  
Greenhouse Gas ◽  
Power Plants ◽  
Low Carbon ◽  
Gas Emissions ◽  
Low Level ◽  
Carbon Neutrality ◽  
Socio Economic Development

The article discusses the key risks of implementing a strategy for long-term socio-economic development of Russia with a low level of greenhouse gas emissions. In recent years, the climate agenda has been the most important driver of structural shifts in the world economy and is viewed by leading countries as a factor in intensifying economic growth and consolidating their technological leadership at the global level. In this context, Russia’s efforts to reduce its carbon footprint without direct import of low-carbon technologies and equipment from developed countries will run into non-recognition (of the carbon sink by Russian forests and carbon-free nature of nuclear and large hydro power plants) and increase in requirements for even more radical reduction in emissions. At the same time, Russia is already making a significant contribution to achieving the goals of the Paris Agreement. The article provides a list of measures that should underlie a balanced national climate policy. The strategy for the socio-economic development of Russia with a low level of greenhouse gas emissions should provide for a balance between solving the problems of preserving the population, improving the quality of its life, and ensuring dynamic and inclusive economic growth in the country. Russia’s potential announcement of commitments to unequivocally achieve carbon neutrality by mid-century carries serious risks to national interests. Instead, a more flexible language should be used to strive for carbon neutrality.

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