March 1, 2021 /

SFB 1313 Publication "Investigation of Crystal Growth in Enzymatically Induced Calcite Precipitation by Micro-Fluidic Experimental Methods and Comparison with Mathematical Modeling"

Authors: Lars von Wolff, Felix Weinhardt, Holger Class, Johannes Hommel, and Christian Rohde
Scientific Journal: Transport in Porous Media

New SFB 1313 publication, published in Transport in Porous Media:

"Investigation of Crystal Growth in Enzymatically Induced Calcite Precipitation by Micro-Fluidic Experimental Methods and Comparison with Mathematical Modeling"

Authors
Abstract

Enzymatically induced calcite precipitation (EICP) is an engineering technology that allows for targeted reduction of porosity in a porous medium by precipitation of calcium carbonates. This might be employed for reducing permeability in order to seal flow paths or for soil stabilization. This study investigates the growth of calcium-carbonate crystals in a micro-fluidic EICP setup and relies on experimental results of precipitation observed over time and under flow-through conditions in a setup of four pore bodies connected by pore throats. A phase-field approach to model the growth of crystal aggregates is presented, and the corresponding simulation results are compared to the available experimental observations. We discuss the model’s capability to reproduce the direction and volume of crystal growth. The mechanisms that dominate crystal growth are complex depending on the local flow field as well as on concentrations of solutes. We have good agreement between experimental data and model results. In particular, we observe that crystal aggregates prefer to grow in upstream flow direction and toward the center of the flow channels, where the volume growth rate is also higher due to better supply.

SFB 1313 Publication: "Investigation of Crystal Growth in Enzymatically Induced Calcite Precipitation by Micro-Fluidic Experimental Methods and Comparison with Mathematical Modeling"

This image shows Lars von Wolff
M.Sc.

Lars von Wolff

Doctoral Researcher, Research Project C02

This image shows Felix  Weinhardt
M. Sc.

Felix Weinhardt

Doctoral Researcher, Research Project C04

This image shows Holger Class
apl. Prof. Dr. Ing.

Holger Class

Principal Investigator, Research Project C04, Central Project Z

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