scholarly journals Models for Calcium Carbonate Precipitation in the Near-Well Zone by Degassing of CO2

2016 ◽  
Vol 9 (1) ◽  
pp. 178-194
Author(s):  
Magnus Wangen ◽  
Jan Sagen ◽  
Tor Bjørnstad ◽  
Harald Johansen ◽  
Alban Souche
Keyword(s):  
Calcium Carbonate ◽  
Numerical Solutions ◽  
Equilibrium Concentration ◽  
Scale Formation ◽  
Analytical Models ◽  
Precipitation Process ◽  
Carbonate Precipitation ◽  
Calcium Carbonate Precipitation ◽  
Porosity Reduction ◽  
Precipitation Regimes

Calcium carbonate scale formation is a well known problem for water producing wells. Although there are several types of scale forming processes, we investigate the case of calcium carbonate precipitation when the degassing of CO2 causes the calcium equilibrium concentration to decrease towards a production well. We study a simplified system of carbonate chemistry, which allows for analytical expressions for the porosity loss as a function of time. The precipitation process normally goes from flow-limited away from the well to precipitation-limited close to the well. We derive an expression that estimates the transition zone between these two regimes. Furthermore, we present analytical estimates for the porosity reduction at a given radius as a function of time, including an estimate for each of these precipitation regimes. These analytical results are tested against numerical solutions for the porosity loss, which account for the full set of equations of the model. The analytical models give an accurate estimate of the linear porosity reduction with time, until at least half the porosity is lost. Examples of scale formation are given for the two regimes. Reasonable values for the precipitation kinetics indicate that most production operations have a kinetics-limited regime close to the well. The models also show that this type of scale formation takes place very close to the wells, typically within a few well radii from the walls of the well.

scholarly journals Calcite seed-assisted microbial induced carbonate precipitation (MICP) and its potential in biocementation

2020 ◽  
Author(s):  
Jennifer Zehner ◽  
Anja Røyne ◽  
Pawel Sikorski
Keyword(s):  
Calcium Carbonate ◽  
Crystallization Process ◽  
Biological Process ◽  
Precipitation Process ◽  
Carbonate Precipitation ◽  
Amorphous Calcium Carbonate ◽  
Calcium Carbonate Precipitation ◽  
Mineral Precipitation ◽  
Solid Materials ◽  
Significant Difference

Microbial-induced calcium carbonate precipitation (MICP) is a biological process inducing biomineralization of CaCO3. This can be used to form a solid, concrete-like material. To be able to use MICP successfully for producing solid materials, it is important to understand the formation process of the material in detail. It is well known, that crystallization surfaces can influence the precipitation process. Therefore, we present in this contribution a systematic study investigating the influence of calcite seeds on the MICP processes. We focus on the pH changes during the crystallization process measured with absorption spectroscopy and on the optical density (OD) signal to analyze the precipitation process. Furthermore, optical microscopy was used to visualize the precipitation processes in the sample and connect them to changes in pH and OD. We show that there is a significant difference in the pH evolution between samples with and without calcite seeds present and that the shape of the pH evolution and the changes in OD can give detailed information about the mineral precipitation and transformations. In the presented experiments we show that amorphous calcium carbonate (ACC) can also precipitate in the presence of initial calcite seeds, which can have consequences for consolidated MICP materials.

Effect of Temperature on Calcium Carbonate Precipitation in Biomimetic Calcium Chloride Solution

2021 ◽  
Vol 107 ◽  
pp. 76-81
Author(s):  
Intan Nurfarzana Mohd Razib Fatheen ◽  
Che Husain Syuhani ◽  
Hamzah Fazlena ◽  
Najwa Mohd Rodhi Miradatul ◽  
Veny Harumi
Keyword(s):  
Calcium Carbonate ◽  
Calcium Chloride ◽  
Chloride Solution ◽  
Calcium Chloride Solution ◽  
Effect Of Temperature ◽  
Precipitation Process ◽  
Carbonate Precipitation ◽  
Calcium Carbonate Precipitation ◽  
Calcium Carbonate Precipitate ◽  
Temperature Range

In the present work, the effect of temperature on calcium carbonate precipitation in the biomimetic calcium chloride solution was investigated. A spontaneous calcium carbonate precipitate was formed in the biomimetic calcium chloride solution as a result of the carbon dioxide hydration process. The reaction was conducted at different temperature range vary from 30°C to 100°C. The mass of the calcium carbonate precipitate and the pH solution was measured in the study. The finding indicated that an increment of the temperature has led to the fast pH reduction of the solutions to 7.0. However, the process has retarded the calcium carbonate precipitation process. The optimum temperature for higher calcium carbonate precipitation has occurred at the temperature range of 47.5°C – 65°C which gave the highest calcium carbonate precipitate at 0.121g. The addition of Tris buffer into the calcium chloride solution in this study did not gave an inhibition effect on the calcium carbonate precipitate. Based on the results, an operating condition at 47.5°C – 65°C was recommended to be used in mineral carbonization of CO2 using the biomimetic calcium chloride solution.

scholarly journals Utilization of Gaseous Carbon Dioxide and Industrial Ca-Rich Waste for Calcium Carbonate Precipitation: A Review

Energies ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 6239
Author(s):  
Natalia Czaplicka ◽  
Donata Konopacka-Łyskawa
Keyword(s):  
Carbon Dioxide ◽  
Calcium Carbonate ◽  
Precipitation Process ◽  
Steelmaking Slag ◽  
Carbonate Precipitation ◽  
Calcium Carbonate Precipitation ◽  
Waste Streams ◽  
Gaseous Carbon Dioxide ◽  
Implementation Problems ◽  
Available Information

Technologies for the management of various types of waste and the production of useful products from them are currently widely studied. Both carbon dioxide and calcium-rich waste from various production processes are problematic wastes that can be used to produce calcium carbonate. Therefore, the purpose of this paper is to provide an overview about the state of the development of processes that use these two wastes to obtain a valuable CaCO3 powder. The paper reviews the current research on the use of post-distillation liquid from the Solvay process, steelmaking slag, concrete, cement, and gypsum waste as well as some others industrial Ca-rich waste streams in the calcium carbonate precipitation process via carbonation route. This work is an attempt to collect the available information on the possibility of influencing the characteristics of the obtained calcium carbonate. It also indicates the possible limitations and implementation problems of the proposed technologies.

scholarly journals Calcite seed-assisted microbial induced carbonate precipitation (MICP)

PLoS ONE ◽  
2021 ◽  
Vol 16 (2) ◽  
pp. e0240763
Author(s):  
Jennifer Zehner ◽  
Anja Røyne ◽  
Pawel Sikorski
Keyword(s):  
Calcium Carbonate ◽  
Systematic Study ◽  
Biological Process ◽  
Precipitation Process ◽  
Carbonate Precipitation ◽  
Amorphous Calcium Carbonate ◽  
Calcium Carbonate Precipitation ◽  
Mineral Precipitation ◽  
Solid Materials ◽  
Significant Difference

Microbial-induced calcium carbonate precipitation (MICP) is a biological process inducing biomineralization of CaCO3. This can be used to form a solid, concrete-like material. To be able to use MICP successfully to produce solid materials, it is important to understand the formation process of the material in detail. It is well known that crystallization surfaces can influence the precipitation process. Therefore, we present in this contribution a systematic study investigating the influence of calcite seeds on the MICP process. We focus on the changes in the pH and changes of the optical density (OD) signal measured with absorption spectroscopy to analyze the precipitation process. Furthermore, optical microscopy was used to visualize the precipitation processes in the sample and connect them to changes in the pH and OD. We show, that there is a significant difference in the pH evolution between samples with and without calcite seeds present and that the shape of the pH evolution and the changes in OD can give detailed information about the mineral precipitation and transformations. In the presented experiments we show, that amorphous calcium carbonate (ACC) can also precipitate in the presence of initial calcite seeds and this can have implications for consolidated MICP materials.

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