Topic
Calcium oxide
About: Calcium oxide is a research topic. Over the lifetime, 7600 publications have been published within this topic receiving 66104 citations. The topic is also known as: caustic lime & quicklime.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this article, the effects of magnesium loading with respect to the pre-cursor, Mg-loadings and temperature treatments have been examined and the experimental results show that loading with a small amount of magnesium (∼1 wt), followed by a high temperature treatment at 1000°C results in a performance similar to the commercial material with high magnesium impurities.
17 citations
Patent•
26 Aug 1983
TL;DR: A building material consists essentially of an aqueous slurry of a dry residue obtained by treating a flue gas containing fly ash from a fossil fuel combustion chamber with a finely divided absorbent consisting at least primarily of calcium oxide, calcium hydroxide and calcium carbonate as mentioned in this paper.
Abstract: A building material consists essentially of an aqueous slurry of a dry residue obtained by treating a flue gas containing fly ash from a fossil fuel combustion chamber with a finely divided absorbent consisting at least primarily of calcium oxide, calcium hydroxide and calcium carbonate to permit reaction between the absorbent and sulfur dioxide in the flue gas, and dry separation of the reacted absorbent from the residual flue gas.
17 citations
Patent•
03 Feb 2010
TL;DR: In this article, a method for rapidly detecting a main component in active lime and passivated lime was proposed, which consists of the following steps: 1, weighing a proper amount of active lime, and carrying out a blank test along with the samples; placing the samples into a heating container; adding a proper amounts of hydrochloric acid solution; heating till the samples are completely decomposed; cooling a few undissolved substances of the passivated limes sample to the room temperature; after the solution is filled into a volumetric flask to fix volume, respectively extracting two
Abstract: The invention relates to the field of analytical chemistry and discloses a method for rapidly detecting a main component in active lime and passivated lime. The method comprises the following steps: 1, weighing a proper amount of active lime and passivated lime samples and carrying out a blank test along with the samples; placing the samples into a heating container; adding a proper amount of hydrochloric acid solution; heating till the samples are completely decomposed; cooling a few undissolved substances of the passivated lime sample to the room temperature; after the solution is filled into a volumetric flask to fix volume, respectively extracting two parts of proper amount of test solution; and 2, respectively titrating calcium oxide and magnesium oxide or calcium and magnesium. Theinvention has the characteristics that the sample decomposition is simplified, and a measurement error is reduced and the analysis time is shortened by controlling the titer of EDTA and EGTA titrand within the burette volume range; two separately added indicating agents are prepared into a mixed indicating agent to be added once when the calcium and magnesium or magnesium oxide is directly titrated so as to reduce the operation time; and the final result is obtained by adding the experience correction coefficient in the passivated lime sample.
17 citations
01 Jan 2010
TL;DR: In this article, the authors present technologies, raw material resources and recent developments with chemical reaction kinetics, recovery/reuse of chemical additives and energy economy being important bottlenecks.
Abstract: Mineralisation of carbon dioxide (CO2), or mineral carbonation, involves the reaction of CO2 with materials containing alkaline-earth oxides like magnesium oxide (MgO) and calcium oxide (CaO). For large-scale CO2 capture and sequestration (CCS) purposes this makes use of the vast resources of magnesium silicate minerals that are available worldwide, resulting in an environmentally benign magnesium carbonate product that needs no post- storage monitoring. As a spin-off technology related to this, the production of valuable calcium carbonates from industrial by-products and wastes quickly develops into profitable technology. Technologies, raw material resources and recent developments are presented here, with chemical reaction kinetics, recovery/re-use of chemical additives and energy economy being important bottlenecks.
17 citations
TL;DR: In this paper, compaction of mesoporous calcium carbonate was investigated for its use in CO2 separation from flue gas, and it was observed that compaction preserved the porosity of the powder.
Abstract: Calcium oxide powder derived by the calcination of mesoporous calcium carbonate provides a higher conversion towards carbonation compared to calcium oxide derived from naturally occurring limestone and hydrated lime. Compaction of this high reactivity sorbent was investigated for its use in CO2 separation from flue gas. It was observed that compaction preserved the porosity of the powder. The pellets were able to attain 50–80% conversion towards carbonation over three cycles. The rate and extent of carbonation reaction reduces with increasing pellet thickness. The effect of compaction load and CO2 concentration did not show any appreciable difference in the rate of carbonation. Whereas the mesoporous calcium carbonate pellet showed appreciable drop in carbonation conversion, the pellets made from other precursors, such as natural limestone and hydrated lime, maintained a higher degree of reactivity over three cycles.
17 citations