2026-09-22T19:23:54Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/16857 2023-07-10 col_2142_5131 col_2142_14770 com_2142_5130 com_2142_3518 com_2142_234

Werth, Charles J. Dehoff, Karl 2010-08-20T18:00:01Z 2010-08-20T18:00:01Z 2010-08-20T18:00:01Z 2010-08 This study examines the reaction between carbonate and calcium to precipitate calcium carbonate in an experimental model. This model is a small micro-fluidic device that incorporates a flow channel with an imprinted homogeneous pore structure to replicate the porous nature of groundwater flow. Sodium carbonate and calcium chloride were injected in to this model to form a calcium carbonate precipitate. The experiment was run and analyzed visually as well as analytically with tools including light, laser confocal, and Raman spectroscopy. The main points of interest include the morphology of the crystals and the rates of crystal formation. A thin line of calcium carbonate formed in the model composed of coarse calcite crystals and fine vaterite crystals. At lower concentrations, this precipitate line was more irregular, wider, and contained more calcite crystals; as concentration increased, the precipitate line became straighter, thinner, and contained more vaterite. Also, precipitation occurred more quickly with increasing concentration. A better understanding of precipitation reactions is important to determine the challenges associated with geological carbon sequestration. Item withdrawn by Mark Zulauf (zulauf@illinois.edu) on 2010-07-19T19:07:11Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 2 Dehoff_Karl.doc: 22542336 bytes, checksum: 5c0a22826022eb2f7816256cc3a8fa80 (MD5) Dehoff_Karl.pdf: 1475508 bytes, checksum: fcc3b4e98a0ad810a80c7760ba4dc439 (MD5) Made available in DSpace on 2010-08-20T18:00:01Z (GMT). No. of bitstreams: 6 Dehoff_Karl.pdf: 1609565 bytes, checksum: 14e568f7fbb987118eb0b0db2ddd0fa7 (MD5) 1_Dehoff_Karl.pdf: 1609622 bytes, checksum: ad4806a1f523644cc225df7a95f897db (MD5) 2_Dehoff_Karl.pdf: 1475508 bytes, checksum: fcc3b4e98a0ad810a80c7760ba4dc439 (MD5) Dehoff_Karl.doc: 22537728 bytes, checksum: 4574685f8ab3972cb0a0de239a692da0 (MD5) 3_Dehoff_Karl.pdf: 1609565 bytes, checksum: 14e568f7fbb987118eb0b0db2ddd0fa7 (MD5) license.txt: 4060 bytes, checksum: f42dc96a0e8576ec04b483aa312f1039 (MD5) http://hdl.handle.net/2142/16857 en Copyright 2010 Karl Dehoff Carbon Sequestration Calcium Carbonate Precipitation Microfluidics Pore-Scale Transverse Mixing Pore-scale characterization of transverse mixing-induced calcium carbonate precipitation of relevance to geological carbon sequestration Civil & Environmental Eng 1251 Environ Engr in Civil Engr 0231 University of Illinois at Urbana-Champaign Thesis M.S. MS:Env Engr Civil Engr -UIUC 10KS0231MS