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Fig. 8 | Geothermal Energy

Fig. 8

From: Crystallization of calcium carbonate in a large-scale push–pull heat storage test in the Upper Jurassic carbonate aquifer

Fig. 8

Typical particle concentration during injection (left picture) and production (right picture) stages. Needle-like aragonites are marked by red ellipses. Spherical particles (here iron and zinc hydroxides) are marked by green circles. The particle concentration clearly increased during production. Here, at \({T}_{\mathrm{Inj}} = 110\), aragonite needles were dominating

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