scholarly journals Environmental Assessment of a Coal Power Plant with Carbon Dioxide Capture System Based on the Activated Carbon Adsorption Process: A Case Study of the Czech Republic

Energies ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2251 ◽  
Author(s):  
Kristína Zakuciová ◽  
Jiří Štefanica ◽  
Ana Carvalho ◽  
Vladimír Kočí
Keyword(s):  
Czech Republic ◽  
Activated Carbon ◽  
Power Plant ◽  
Power Unit ◽  
Adsorption Process ◽  
Flue Gases ◽  
Activated Carbon Adsorption ◽  
The Czech Republic ◽  
Carbon Adsorption

The Czech Republic is introducing new technological concepts for mitigation of greenhouse gases (GHG) in coal-based energy industries. One such technology, in power plants, is post combustion CO2 capture from flue gases by activated carbon adsorption. A life cycle assessment (LCA) was used as the assessment tool to determine the environmental impacts of the chosen technology. This article focuses on a comparative LCA case study on the technology of temperature-swing adsorption of CO2 from power plant flue gases, designed for the conditions of the Czech Republic. The LCA study compares the following two alternatives: (1) a reference power unit and (2) a reference power unit with CO2 adsorption. The most significant changes are observed in the categories of climate change potential, terrestrial acidification, and particulate matter formation. The adsorption process shows rather low environmental impacts, however, the extended LCA approach shows an increase in energy demands for the process and fossil depletion as a result of coal-based national energy mix. The feasibility of the study is completed by the preliminary economical calculation of the payback period for a commercial carbon capture unit.

Activated Carbon from Sugarcane (Saccharum officinarum L.) Bagasse for Removal Ca2+ and Mg2+ Ion from Well Water

2020 ◽  
Vol 2 (2) ◽  
pp. 22-32
Author(s):  
Ira Tyas Kurniasari ◽  
Cucun Alep Riyanto ◽  
Yohanes Martono
Keyword(s):  
Activated Carbon ◽  
Adsorption Process ◽  
High Hardness ◽  
Saccharum Officinarum ◽  
Well Water ◽  
Activated Carbon Adsorption ◽  
Adsorption Method ◽  
Impregnation Ratio ◽  
Carbon Adsorption ◽  
Stirring Time

Humans need water with good quality to fulfill their needs. Water with high hardness content will have a bad impact if consumed continuously, so the adsorption method is carried out to reduce the concentration of Ca2+ and Mg2+ ions. The adsorption process uses sugarcane bagasse activated carbon (SBAC) and the tested water sample is well water in District Jati, Kudus. Synthesis of  SBAC was conducted with H3PO4 30% as an activator at an impregnation ratio of 1:5 (w/w) at temperature 700°C. The FTIR result showed that SBAC contains O-H, C-H, C=C, C≡C, and C-O as functional groups. Analysis result with the XRD instrument showed that the microstructure of SBAC that is formed is turbostatic structure and amorphous. Modeling isotherm suitable for SBAC adsorption on Ca2+ ions is Langmuir isotherm where the R2 value is 0.9134 which shows that the adsorption process occurs chemically and monolayer. Modeling isotherm suitable for SBAC adsorption on Mg2+ ions is Elovich isotherm where the R2 value is 0.8638 which means that the adsorption process is multilayer and adsorption in non-ideal conditions. Modeling kinetics suitable for SBAC adsorption on  Ca2+ and Mg2+ ions is Pseudo Orde 2 where the R2 value is 0.9395 and 0.7274. Percent efficiency value of sugarcane activated carbon adsorption of Ca2+ dan Mg2+ ions on District Jati, Kudus well water is 14.44% and 8.94% and 40 minutes stirring time.

scholarly journals Proposal of enhanced treatment process based on actual pilot plant for removal of micropharmaceuticals in sewage treatment plants

2019 ◽  
Vol 25 (4) ◽  
pp. 588-596
Author(s):  
Shun-hwa Lee ◽  
Yun-kyung Park ◽  
Miran Lee ◽  
Byung-dae Lee
Keyword(s):  
Activated Carbon ◽  
Removal Efficiency ◽  
Treatment Process ◽  
Adsorption Process ◽  
Biological Process ◽  
Sewage Treatment ◽  
Optimal Treatment ◽  
Activated Carbon Adsorption ◽  
Carbon Adsorption ◽  
Single Process

This study was carried out to increase the treatment efficiency through the improvement of the conventional biological process, and to propose the optimal treatment direction. The optimal treatment conditions were derived based on the results of the spike damage tests in each single process. The removal efficiency of micropharmaceuticals was further increased when an ozone treatment process was added to the biological process compared to the single process. The soil and activated carbon adsorption process was introduced in the post-treatment to remove the micropharmaceutical residues, and the removal efficiency of the pharmaceduticals in the final effluent was more than 85% in spike damage experiment. In particular, the continuous process of biological treatment-ozone-adsorption could ensure the stable treatment of micropharmaceuticals, which had not been efficiently removed in the single process, as it showed more than 80% removal efficiency. Therefore, it is expected that the addition of the ozone oxidation and activated carbon adsorption process to the existing sewage treatment facilities can contribute to the efficient removal of micropharmaceuticals.

Partitioning and removal of dioxin-like congeners in flue gases treated with activated carbon adsorption

Chemosphere ◽  
2006 ◽  
Vol 64 (9) ◽  
pp. 1489-1498 ◽  
Author(s):  
Kai Hsien Chi ◽  
Shu Hao Chang ◽  
Chia Hua Huang ◽  
Hung Chi Huang ◽  
Moo Been Chang
Keyword(s):  
Activated Carbon ◽  
Flue Gases ◽  
Activated Carbon Adsorption ◽  
Carbon Adsorption

Treatment of a wood products Superfund wastewater: a case study

1991 ◽  
Vol 18 (4) ◽  
pp. 654-662 ◽  
Author(s):  
M. F. Dahab ◽  
H. L. Becker ◽  
T. E. Riley
Keyword(s):  
Activated Carbon ◽  
Suspended Solids ◽  
Wood Products ◽  
Activated Carbon Adsorption ◽  
Design Data ◽  
Baseline Design ◽  
Carbon Adsorption ◽  
Different Types ◽  
Solids Removal

This paper reports the results of studies designed to determine the treatability of wastewater from a wood products Superfund site using conventional technologies. The treatability studies consisted of a series of filtration pretreatment experiments using different types of filter media to remove suspended solids and emulsified floating oils and grease prior to batch and continuous activated carbon adsorption experiments to remove semi-volatile organics from the wastewater. The results indicated that adequate suspended and emulsified solids removal efficiencies were obtained prior to carbon adsorption. Continuous activated carbon experiments resulted in excellent removal of the most prevalent organics of interest. The results of the experiments were instrumental in establishing baseline design data for full-scale implementation of a remediation system. Key words: hazardous waste, Superfund, wood products, wastewater, pentachlorophenol, adsorption.

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