ChemInform Abstract: CHARACTERIZATION OF THE POROUS CALCIUM OXIDE PARTICLES FORMED BY DECOMPOSITION OF CALCIUM CARBONATE AND CALCIUM HYDROXIDE IN VACUUM

1980 ◽  
Vol 11 (46) ◽  
Author(s):  
D. BERUTO ◽  
L. BARCO ◽  
A. W. SEARCY ◽  
G. SPINOLO
Keyword(s):  
Calcium Carbonate ◽  
Calcium Hydroxide ◽  
Calcium Oxide ◽  
Abstract Characterization ◽  
Oxide Particles

Characterization of Calcium Carbonate, Calcium Oxide, and Calcium Hydroxide as Starting Point to the Improvement of Lime for Their Use in Construction

2009 ◽  
Vol 21 (11) ◽  
pp. 694-698 ◽  
Author(s):  
Miguel Galván-Ruiz ◽  
Juan Hernández ◽  
Leticia Baños ◽  
Joaquín Noriega-Montes ◽  
Mario E. Rodríguez-García
Keyword(s):  
Calcium Carbonate ◽  
Calcium Hydroxide ◽  
Calcium Oxide ◽  
Starting Point

scholarly journals CALCIUM OXIDE CHARACTERISTICS PREPARED FROM AMBUNTEN’S CALCINED LIMESTONE

2018 ◽  
Vol 5 (1) ◽  
pp. 65 ◽  
Author(s):  
Fatimatul Munawaroh ◽  
Laila Khamsatul Muharrami ◽  
Triwikantoro Triwikantoro ◽  
Zaenal Arifin
Keyword(s):  
Calcium Carbonate ◽  
Chemical Composition ◽  
Calcium Oxide ◽  
Crystalline Phase ◽  
Wave Number ◽  
Test Results ◽  
X Ray Diffraction ◽  
X Ray ◽  
Oxide Characteristics

<pre>Calcium oxide (CaO) and calcium carbonate (CaCO3) are widely used in industry. CaO and CaCO3 can be synthesized or derived from limestone. The purpose of this study to determine the characteristics of CaO calcined limestone from Ambunten Sumenep. Lime in calcined at 850 ° C for 6 hours. Characterization of X-ray fluorescence (XRF) was conducted to determine the chemical composition of limestone, X-ray diffraction test (XRD) to find the lime crystalline phase and FTIR test to determine the absorption of wave number. XRF test results showed that the limestone chemical composition consisted of Ca of 95.37% as the dominant element, Mg of 4.1%, Fe 0.17% and Y by 0.39%. The XRD test results showed that the limestone crystal phase is ankerite (Ca [Fe, Mg] [CO3] 2) and after the calcined phase calcination is vaterite (Ca [OH] 2), calcite (CaO) and calcite (CaCO3). While the FTIR test results show that the CaO spectra are seen at 3741.24, 1417.12 and 874.14 cm</pre><sup>-1</sup><pre>.</pre>

Design of a Solar Thermochemical Reactor for Calcium Oxide Based Carbon Dioxide Capture

2015 ◽  
Author(s):  
Leanne Reich ◽  
Luke Melmoth ◽  
Robert Gresham ◽  
Terrence Simon ◽  
Wojciech Lipiński
Keyword(s):  
Carbon Dioxide ◽  
Calcium Carbonate ◽  
Calcium Oxide ◽  
Thermal Analyses ◽  
Reactor Design ◽  
Gas Flows ◽  
Carbonate Carbon ◽  
Calcination Step ◽  
Oxide Particles ◽  
Concentrated Solar Radiation

An engineering design for a 1-kW dual-cavity solar-driven reactor to capture carbon dioxide via the calcium oxide based two-step carbonation-calcination cycle is presented. In the low temperature carbonation step, gas containing up to 15% carbon dioxide flows through a gas manifold and plenum into an annular reaction zone filled with calcium oxide particles. The carbon dioxide reacts with the calcium oxide, forming calcium carbonate. Carbon dioxide-depleted gas flows out of the reactor through a second gas manifold. In the high temperature calcination step, concentrated solar radiation enters the beam-up oriented, windowless reactor and is absorbed by the diathermal cavity wall, which transfers heat via conduction to the calcium carbonate particles formed in the previous step. The calcium carbonate dissociates into calcium oxide and carbon dioxide. Additional carbon dioxide is used as a sweep gas to ensure high purity carbon dioxide at the outlet. Mechanical and thermal analyses are conducted to refine an initial reactor design and identify potential design shortcomings. Numerically predicted temperature profiles in the reactor are presented and the final reactor design is established.

ChemInform Abstract: Characterization of Calcium Oxide-Fly Ash Sorbents for SO2 Removal.

ChemInform ◽  
2010 ◽  
Vol 23 (5) ◽  
pp. no-no
Author(s):  
R. A. DIFFENBACH ◽  
M. J. HILTERMAN ◽  
E. A. FROMMELL ◽  
H. B. BOOHER ◽  
S. W. HEDGES
Keyword(s):  
Fly Ash ◽  
Calcium Oxide ◽  
Abstract Characterization ◽  
So2 Removal

CALCIUM CYCLE IN CHEMISTRY TEACHING AT THE LOWER SECONDARY SCHOOL

2019 ◽  
Author(s):  
Karel Kolar ◽  
◽  
Martin Bilek ◽  
Katerina Chroustova ◽  
Jiri Rychtera ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Calcium Carbonate ◽  
Hydrochloric Acid ◽  
Secondary School ◽  
Calcium Hydroxide ◽  
Calcium Chloride ◽  
Calcium Oxide ◽  
Lower Secondary School ◽  
Chemistry Teaching ◽  
Lower Secondary Education

The research is focused on the use of experimental calcium cycle in chemistry teaching at the lower secondary school. The cycle is based on four reactions: 1. thermal decomposition of calcium carbonate, 2. reaction of calcium oxide with water, 3. calcium hydroxide with hydrochloric acid, 4. reaction of calcium chloride with sodium carbonate. The calcium cycle was tested at lower secondary schools (and equal classes from comprehensive schools). Despite the difficulty of taking some steps, the cycle was accepted by both teachers and learners. Keywords: chemistry teaching, experimental cycle, calcium cycle, lower secondary education.

Sign in / Sign up

Export Citation Format

Share Document