Effect of ions on particle size and morphology in calcium carbonate((CaCO3) crystallization
Osman Adam Osman, Ahmed, author.

Effect of ions on particle size and morphology in calcium carbonate((CaCO3) crystallization

Osman Adam Osman, Ahmed, author.

Yazar Ek Girişi
Osman Adam Osman, Ahmed, author.

Fiziksel Tanımlama
xiii, 90 leaves: charts;+ 1 computer laser optical disc.

The particle sizes of calcium carbonate (CaCO3) produced by the chemical crystallization method were reported to be almost always larger than 3 µm. An experimental setup was developed to crystalize CaCO3 from sodium carbonate (Na2CO3) and calcium chloride (CaCl2) solutions in a plug flow reactor (PFR) with a retention time of 9 seconds and added into a stabilizing solution of calcium hydroxide. The CaCO3 particles were produced with a size larger than 13 µm in the PFR tubular reactor. Effect of cations such as hydroxide form of sodium (Na+), potassium (K+), calcium (Ca++), and barium (Ba++) as well as anions such as the sodium form sulfate (SO4=), nitrate (NO3-), carbonate (CO3=) and bisphosphate (HPO4=) were investigated. While cations produced calcite particles at sizes larger than 2 μm in the presence of Na+and K+ ions, nano-calcite particles in the presence of Ca++ ions. A new crystalline form, Barytocalcite (BaCa(CO3)2), and whitherite (BaCO3) particles were produced in solution containing Ba++ ions. The size and morphology of vaterite and calcite particles did not change as particles in the PFR tubular reactor in the presence of SO4=, NO3-, and CO3=ions. Different crystal forms were synthesized in the presence of HPO4=ion. These formations clearly indicated the dissolution and recrystallization of CaCO3 particles. A novel technique was devised for the continuous production of nano-CaCO3. It was demonstrated that nano-calcite particles of about 350 nm were produced by the chemical method not previously reported in the literature.

Konu Başlığı
Calcium carbonate

Yazar Ek Girişi
Özdemir, Ekrem,

Tüzel Kişi Ek Girişi
İzmir Institute of Technology. Chemical Engineering.

Tek Biçim Eser Adı
Thesis (Master)--İzmir Institute of Technology:Chemical Engineering.
İzmir Institute of Technology: Chemical Engineering --Thesis (Master).

Elektronik Erişim
Access to Electronic Versiyon.

KütüphaneMateryal TürüDemirbaş NumarasıYer NumarasıDurumu/İade Tarihi
IYTETezT002451TP156.C7 O83 2021Tez Koleksiyonu