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.
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TL;DR: In this article, the absorption of hydrogen chloride by spent desulfurization sorbents containing calcium carbonate, calcium oxide and calcium hydroxide was investigated in a fixed-bed reactor in two temperature ranges.
36 citations
TL;DR: In this paper, the role of calcium oxide on ash fusion properties was investigated by molecular dynamics simulations and thermodynamics calculations, which was compared with the liquidus temperature calculated by the FactSage codes.
35 citations
Patent•
21 Jul 1978
TL;DR: The sorbent capacity of calcium oxide with respect to sulfur dioxide is increased by calcining limestone or dolomite in an atmosphere where the partial pressure of carbon dioxide is greater than 40 percent of the equilibrium partial pressure over calcium carbonate at reaction temperature as mentioned in this paper.
Abstract: The sorbent capacity of calcium oxide with respect to sulfur dioxide is increased by calcining limestone or dolomite in an atmosphere where the partial pressure of carbon dioxide is greater than 40 percent of the equilibrium partial pressure of carbon dioxide over calcium carbonate at the reaction temperature. Where dolomite is the starting material, it may be calcined in a two-step heating process in which the atmosphere during the first heating stage contains carbon dioxide and the temperature is maintained in the dissociation range of magnesium carbonate (Mg CO3); the atmosphere of the second heating stage also contains carbon dioxide, but the temperature is maintained in the calcium carbonate (CaCO3) dissociation range. Calcium oxide so produced in such an atmosphere of carbon dioxide sufficient to delay calcination is found to have relatively large mouthed pores capable of sorbing increased amounts of sulfur.
35 citations
TL;DR: The addition of lime has a pronounced effect on soft soils as mentioned in this paper, which is problematic because of their low strength, low bearing capacity, low permeability, and high compressibility.
Abstract: Soft soils are problematic because of their low strength, low bearing capacity, low permeability, and high compressibility. The addition of lime has a pronounced effect on such soils. In th...
35 citations
TL;DR: This work reports a scalable route based on wet mechanochemical activation to prepare MgO-stabilized, CaO-based CO2 sorbents that exceed the CO2 uptake of the reference limestone by 200 %.
Abstract: Carbon dioxide capture and storage (CCS) is a promising approach to reduce anthropogenic CO2 emissions and mitigate climate change. However, the costs associated with the capture of CO2 using the currently available technology, that is, amine scrubbing, are considered prohibitive. In this context, the so-called calcium looping process, which relies on the reversible carbonation of CaO, is an attractive alternative. The main disadvantage of naturally occurring CaO-based CO2 sorbents, such as limestone, is their rapid deactivation caused by thermal sintering. Here, we report a scalable route based on wet mechanochemical activation to prepare MgO-stabilized, CaO-based CO2 sorbents. We optimized the synthesis conditions through a fundamental understanding of the underlying stabilization mechanism, and the quantity of MgO required to stabilize CaO could be reduced to as little as 15 wt %. This allowed the preparation of CO2 sorbents that exceed the CO2 uptake of the reference limestone by 200 %.
35 citations