scholarly journals Impact on CO2 Uptake of MWCNT after Acid Treatment Study

2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
Michal Zgrzebnicki ◽  
Nikola Krauze ◽  
Andżelika Gęsikiewicz-Puchalska ◽  
Joanna Kapica-Kozar ◽  
Ewa Piróg ◽  
...  
Keyword(s):  
Greenhouse Effect ◽  
Photoelectron Spectroscopy ◽  
Acid Treatment ◽  
Activated Carbons ◽  
Area Measurement ◽  
Co2 Uptake ◽  
Relative Pressure ◽  
Earth’S Atmosphere ◽  
Average Temperature ◽  
Earth's Atmosphere

Greenhouse effect is responsible for keeping average temperature of Earth’s atmosphere at level of about 288 K. Its intensification leads to warming of our planet and may contribute to adverse changes in the environment. The most important pollution intensifying greenhouse effect is anthropogenic carbon dioxide. This particular gas absorbs secondary infrared radiation, which in the end leads to an increase of average temperature of Earth’s atmosphere. Main source of CO2 is burning of fossil fuels, like oil, natural gas, and coal. Therefore, to reduce its emission, a special CO2 capture and storage technology is required. Carbonaceous materials are promising materials for CO2 sorbents. Thus multiwalled carbon nanotubes, due to the lack of impurities like ash in activated carbons, were chosen as a model material for investigation of acid treatment impact on CO2 uptake. Remarkable 43% enhancement of CO2 sorption capacity was achieved at 273 K and relative pressure of 0.95. Samples were also thoroughly characterized in terms of texture (specific surface area measurement, transmission electron microscope) and chemical composition (X-ray photoelectron spectroscopy).

scholarly journals Potensi Simpanan Karbon pada Tegakan Revegetasi Lahan Pasca Tambang PT Holcim Indonesia Tbk

2020 ◽  
Vol 11 (2) ◽  
pp. 89-95
Author(s):  
Omo Rusdiana ◽  
Syidik Fahmi
Keyword(s):  
Greenhouse Gases ◽  
Greenhouse Effect ◽  
Carbon Stock ◽  
Total Carbon ◽  
Site Quality ◽  
Earth’S Atmosphere ◽  
Diameter Increment ◽  
Average Temperature ◽  
Earth's Atmosphere ◽  
Destructive Methods

Global warming is a gradual increase in the average temperature of the Earth’s atmosphere caused by the increased volumes of greenhouse gases such as carbon dioxide, methane, and nitrous oxide. Greenhouse gases is trapped inside the atmosphere and caused UV radiation difficulty passing through Earth’s atmosphere, a processed is often referred to as the greenhouse effect. Reclamation and revegetation activities were expected could decrease the greenhouse effect. The aims of the research is to estimate total carbon stock in Pine Forest age 2005 or 11 years and 2012 or 4 years, and also to compare the result with former research in post mining revegetation site PT Holcim Indonesia Tbk. Biomass measurement of trees, poles, and saplings is conducted with non-destructive methods meanwhile biomass measurements of understorey, litter, and necromassa used destructive methods. The result showed that the value of biomass and carbon stock on the 2005 pine stand is acquired 75.31 tons/ha and 35.39 tons/ha. The value of the biomass and carbon stock on the 2012 pine stand is acquired 12.72 tons/ha and 5.98 ton/ha or increased from the previous year's measurement. Increasing of biomass content and carbon stocks is caused several factors such as increasing of diameter increment dan site quality. Keywords: biomass, carbon, reclamation

GLOBAL DECARBONIZATION: CURRENT TRENDS AND FORECASTS

2021 ◽  
Vol 16 (3) ◽  
pp. 32-37
Author(s):  
Salavat Suleymanov ◽  
Svetlana Sochneva ◽  
Nikolay Trofimov ◽  
Elmir Gallyamov
Keyword(s):  
Carbon Dioxide ◽  
Renewable Energy Sources ◽  
The United States ◽  
Scientific Article ◽  
The European Union ◽  
Earth’S Atmosphere ◽  
Average Temperature ◽  
Current Trends ◽  
Average Global Temperature ◽  
Earth's Atmosphere

The scientific article provides an analysis of data on the dynamics of changes in the concentration of carbon dioxide in the Earth’s atmosphere, its relationship with an increase in the average temperature of the Earth’s surface and further measures related to the decarbonization of industry. When analyzing theoretical materials, it was revealed that the concentration of carbon dioxide in the Earth’s atmosphere increased from 270 to 419 parts per million (ppm), which ultimately led to an increase in temperature on the planet by 1.1°C over the past 150 years. If the current rate of growth in the concentration of greenhouse gases in the atmosphere is maintained, the increase in the average global temperature may exceed 4°C, which will have catastrophic consequences. In terms of CO2 emissions, China ranks first in the world (28,8% of the total global emissions), followed by the United States (14,5%). Next are the European Union (9,7%), India (7,3%), Russia (4.5%) and Japan (3,3%), etc. To keep the average temperature rise within 1.5°C, the share of renewable energy sources in electricity generation should increase in 2050 to at least 70-85 percent. At the same time, the share of natural gas, provided that technologies for capturing and storing CO2 are used, will decrease to 8% (from 3 to 11% according to different scenarios), while the share of coal will decrease to almost 0% (0-2%)

Adsorption of Phenol onto Activated Carbons

2012 ◽  
Vol 531 ◽  
pp. 407-410
Author(s):  
Xiao Yan Tan ◽  
Guo Lan Li ◽  
Song Li
Keyword(s):  
Photoelectron Spectroscopy ◽  
Acid Treatment ◽  
Adsorption Process ◽  
Activated Carbons ◽  
Kinetic Studies ◽  
Surface Characteristics ◽  
Point Of Zero Charge ◽  
Phenol Adsorption ◽  
Boehm Titration ◽  
Pseudo Second Order

Coal-based Activated carbon was modified by thermal and nitric acid treatment to adsorb phenol from aqueous solution. Boehm titration, point of zero charge ( pHPZC ) and X-photoelectron spectroscopy (XPS) were used to characterize activated carbons. Acid treatment leads to the increase of the content of surface oxygen, whereas thermal treatment causes the decrease of the content of surface oxygen.The surface characteristics of activated carbons have significant effect on phenol adsorption. The adsorption isotherms of phenol adsorption are described by Langmuir isotherm. The kinetic studies indicate that the adsorption process is fitted well by the pseudo-second- order kinetics.

The Effect and Strategy of Global Warming

2015 ◽  
Vol 1092-1093 ◽  
pp. 1625-1628
Author(s):  
Le Hui Huang ◽  
Miao Miao Li
Keyword(s):  
Global Warming ◽  
Greenhouse Effect ◽  
Earth’S Atmosphere ◽  
The Earth ◽  
Earth's Atmosphere

Global warming is one of the biggest environment challenges in front of human today. The earth’s atmosphere and clouds have the function of insulation, making the earth maintain a certain temperature in the night. The earth is in a serious greenhouse effect due to increasing pollution. The paper explains how to deal with and curb global warming.

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