scholarly journals Obtaining construction materials based on the dolomite lime of accelerated forced-carbonization hardening

Vestnik MGSU ◽  
2020 ◽  
pp. 43-57
Author(s):  
Tamara А. Bakhtina ◽  
Nikolay V. Lyubomirskiy ◽  
Aleksandr S. Bakhtin ◽  
Vitaliy V. Nikolaenko
Keyword(s):  
Carbon Dioxide ◽  
Carbon Dioxide Emissions ◽  
Construction Material ◽  
Carbon Dioxide Emission ◽  
Construction Materials ◽  
Carbon Dioxide Concentration ◽  
Average Density ◽  
Burning Temperature ◽  
Physicomechanical Characteristics ◽  
Reduce Carbon Dioxide

Introduction. To solve the problem of increasing the concentration of greenhouse gases in the atmosphere leading to global environmental problems, searches of ways to reduce carbon dioxide emissions are conducted in the field of construction material production. lower burning temperature, lower carbon dioxide emissions, and further binding of the exuding carbon dioxide to insoluble compounds, which determine the obtainment of a dolomite lime-based material with high mechanical properties are characteristic of dolomite lime. Materials and methods. Dolomite rock with a fraction of 5 mm to 10 mm was burned in a laboratory chamber furnace, while the calcined product was ground to pass through a 1.25 mm mesh sieve and tempered with water. The dolomite lime obtained after hydration was pressed into cylinder samples with a diameter and a height of 30 mm. The samples were subjected to forced carbonization in a particular chamber at a certain carbon dioxide concentration and for a certain chamber holding time. Results. The physicomechanical characteristics of the experimental carbonized samples were determined (compressive strength of 2 to 36 MPa with an average density of 1500 to 1800 kg/m3). The samples got hard under conditions of an increased carbon dioxide concentration. The results obtained under laboratory conditions were tested under industrial conditions at a functioning enterprise by pressing a single brick batch, its subsequent carbonate hardening in a pilot industrial chamber for forced carbonization, and determination of the main standardized properties. Conclusions. The low-burned carbonate-hardened dolomite lime allows reducing carbon dioxide emission during production by means of lowering the burning temperature with the subsequent use of the exuding carbon dioxide for the implementation of carbonate hardening of dolomite lime-based products.

Aspects of Carbon Dioxide Mitigation by Nannochloropsis oculata Cultured in a Photobioreactor

2014 ◽  
Vol 625 ◽  
pp. 775-779
Author(s):  
Vijendren Krishnan ◽  
Yoshimitsu Uemura ◽  
Suzana Yusup ◽  
Norridah Osman
Keyword(s):  
Carbon Dioxide ◽  
Carbon Dioxide Emission ◽  
Lipid Synthesis ◽  
Carbon Dioxide Concentration ◽  
Nannochloropsis Oculata ◽  
Marine Microalgae ◽  
Biodiesel Production ◽  
Photobioreactor Design ◽  
Reduce Carbon Dioxide ◽  
Carbon Dioxide Mitigation

This paper primarily presents on carbon dioxide mitigation by marine microalgae. Among the potential marine microalgae,Nannochloropsis oculatahas been identified as a promising species which can be utilized to reduce carbon dioxide concentration via photosynthesis process. The growth ofN. oculataand lipid synthesis for biodiesel production is influenced by various aspects. The aspects that are focused in this paper include light source and intensity, temperature, carbon dioxide concentration, and photobioreactor design. Besides, emerging technologies that are able to increase the efficiency of carbon dioxide reduction were also highlighted. As a whole,N. oculatamight play a key role in reducing the global carbon dioxide emission as well as enhancing the biodiesel production.

scholarly journals Is China’s target of a 40-45% reduction in carbon dioxide emission plausible?

2017 ◽  
Vol 5 (1) ◽  
pp. 46-50 ◽  
Author(s):  
Mpho Bosupeng
Keyword(s):  
Economic Growth ◽  
Carbon Dioxide ◽  
Energy Consumption ◽  
Carbon Dioxide Emissions ◽  
Carbon Dioxide Emission ◽  
Environmental Preservation ◽  
Carbon Taxation ◽  
Reduce Emissions ◽  
Potential Damage ◽  
Reduce Carbon Dioxide

AbstractIn the early days of industrialisation, economists believed that the ramifications of economic growth will far outweigh the potential damage to the environment. Today the concern is the rising magnitude of emissions. Many economies are under immense pressure to reduce carbon dioxide emissions. Carbon taxation and absorption technologies seem to be the main mechanisms controlling emissions in different nations. China proposed her target of reducing carbon dioxide emissions by 40-45% by 2025. The purpose of this study is to determine if China’s ambition of reducing its carbon dioxide emissions is feasible. This investigation also examines the potential effects of China's emissions on the economic growth of other countries. The study demonstrates that China’s target may not only reduce her output, but may also adversely affect the economic growth of others. This article further reveals that unemployment in China is likely to soar during the reduction in emissions and energy consumption. Additionally, this paper evaluates the effects of green taxation on carbon dioxide emissions. In conclusion, there is a possibility that China may reach her emissions target by 2025. However, the country faces a dilemma between economic growth and environmental preservation. It is recommended that China should explore techniques which will reduce emissions but not impinge negatively on economic growth.

The Study on Community Energy Planning and Emission Reduction in China

2012 ◽  
Vol 433-440 ◽  
pp. 1442-1446 ◽  
Author(s):  
Zhi Hua Zhou ◽  
Zi Chao Tan ◽  
Guo Qiang Yang ◽  
She Ming Qiu
Keyword(s):  
Carbon Dioxide ◽  
Energy Consumption ◽  
Energy Conservation ◽  
Energy Saving ◽  
Carbon Dioxide Emissions ◽  
Carbon Dioxide Emission ◽  
Energy Structure ◽  
Regional Energy ◽  
Save Energy ◽  
Reduce Carbon Dioxide

Climate change is becoming a highlight of the world. As the world's second largest CO2 emission country, China faces increasing pressure. Energy consumption and utilizing is the major source of CO2 emissions. Optimization of the regional energy configuration can not only reduce energy consumption, but also reduce carbon dioxide emissions. Thus, it will achieve energy conservation and sustainable development. Based on the Eco-city constructed by China and Sino-Singapore, this paper calculates the regional energy-saving under the requirement of existing Energy Conservation Code, plans its energy saving quantity by taking some measurements and then predicts the carbon dioxide emission reductions. The result shows that using effective measures to save energy can reduce 227772t carbon dioxide emissions. Using renewable energy and energy saving measures will reduce 371414t CO2, which has a striking effect. So changing energy structure and using renew energy are main measures to reduce CO2 emission.

scholarly journals Contribution of Cloud Computing in the Reduction of Carbon Dioxide Emission

2014 ◽  
Vol 2 (8) ◽  
pp. 133-139
Author(s):  
Nusratullah Khan ◽  
Kajal Nusatullah ◽  
Asadullah Shah
Keyword(s):  
Carbon Dioxide ◽  
Cloud Computing ◽  
Carbon Dioxide Emissions ◽  
Emission Reduction ◽  
Carbon Dioxide Emission ◽  
Reduction Process ◽  
Information Technology Industry ◽  
Technology Industry ◽  
Computing Industry ◽  
Reduce Carbon Dioxide

The Information Technology industry is rapidly expanding and as a result its contribution to carbon dioxide emission is also rapidly increasing. Fortunately, the cloud computing industry is perceived by many to be a viable solution for reducing carbon dioxide emissions. Accordingly, there are numerous studies which try to prove that cloud computing can reduce carbon dioxide emissions up to more than half of the current carbon dioxide emissions. In this paper, two of such studies where reviewed to assess whether cloud computing is indeed a viable candidate for limiting and reducing the amount of carbon dioxide emitted by the IT industry. All the information gathered in this paper prove that; cloud computing is a promising technology which could reduce carbon dioxide emissions. The percentage of decrease can range from 10% to 90%. The effectiveness of the carbon dioxide emission reduction process is highly dependent on the size of the business organization. Accordingly the size of the organization is negatively correlated to the efficiency of carbon dioxide reduction. This means that as the size of the organization increase, carbon dioxide emission reduction decrease. This paper also presented the four reasons why cloud computing can reduce carbon dioxide emissions, which are: dynamic provisioning, multi-tenancy, server utilization, and data center efficiency.

scholarly journals The Problem of Carbon Dioxide Emissions from Closed Coal Mine Shafts – The Overview and the Case Study

2016 ◽  
Vol 61 (3) ◽  
pp. 587-600
Author(s):  
Paweł Wrona ◽  
Józef Sułkowski ◽  
Zenon Różański ◽  
Grzegorz Pach
Keyword(s):  
Carbon Dioxide ◽  
Carbon Dioxide Emissions ◽  
Carbon Dioxide Emission ◽  
Mining Area ◽  
Emission Point ◽  
Water Pumping ◽  
Gas Hazard ◽  
Flow Through ◽  
Reporting Procedures

Abstract Greenhouse gas emissions are a common problem noticed in every mining area just after mine closures. However, there could be a significant local gas hazard for people with continuous (but variable) emission of these gases into the atmosphere. In the Upper Silesia area, there are 24 shafts left for water pumping purposes and gases can flow through them hydraulically. One of them – Gliwice II shaft – was selected for inspection. Carbon dioxide emission with no methane was detected here. Changes in emission and concentration of carbon dioxide around the shaft was the aim of research carried out. It was stated that a selected shaft can create two kinds of gas problems. The first relates to CO2 emission into the atmosphere. Possible emission of that gas during one minute was estimated at 5,11 kg CO2/min. The second problem refers to the local hazard at the surface. The emission was detected within a radius of 8m from the emission point at the level 1m above the ground. These kinds of matters should be subject to regular gas monitoring and reporting procedures.

Driving Factors Analysis of Carbon Dioxide Emissions in China Based on STIRPAT Model

2013 ◽  
Vol 734-737 ◽  
pp. 1910-1914 ◽  
Author(s):  
Qiao Zhi Zhao ◽  
Qing You Yan
Keyword(s):  
Economic Growth ◽  
Carbon Dioxide ◽  
Carbon Dioxide Emissions ◽  
High Speed ◽  
Carbon Dioxide Emission ◽  
Urbanization Process ◽  
Stirpat Model ◽  
Factors Analysis ◽  
Secondary Industry

China is developing at relatively high speed, not only the regional development speed should be focused upon, but also the environmental impact of economic growth should be paid attention to, especially the level change of carbon dioxide emission. To some degree, quantity of carbon dioxide emission has become one of the most important indexes for measuring quality of a nations economic growth. Thus, this thesis is trying to analyze the driving relations between economic growth and carbon dioxide. Upon STIRPAT model, ridge regression method and elasticity theory are applied to analyze the influencing factors of carbon dioxide quantity such as the population quantity, Chinas urbanization process, per capita GDP, energy density and the percentage of the secondary industry. Correspondingly, based on the different influencing variables to carbon dioxide emission quantity, needy measures are brought out to control and decrease emissions. Feasible suggestions are trying to improve Chinas economic development quality.

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