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 authors summarized the state-of-the-art research in the literature aiming to identify potential solutions to the loss-in-capacity problem and found that hydration during or after calcination is effective in recovering the capacity of natural minerals.
Abstract: While calcium oxide has been identified to be the best candidate for capturing CO2 at high temperature, it suffers a well-known problem of loss-in-capacity; that is, its capacity for carbon capture decays dramatically during cyclic carbonation/calcination processes. Recently, extensive research work has been conducted on the enhancement of the cyclic performance of calcium oxide through either improving the performance of natural minerals, such as water/steam hydration and pretreatment or modification of calcium oxide sorbents by some techniques such as doping and synthesis. This work summarizes the state-of-the-art research in the literature aiming to identify potential solutions to the loss-in-capacity problem. It is found that hydration during or after calcination is effective in recovering the capacity of natural minerals and mixing can produce highly effective synthetic sorbents. Periodic hydration of synthetic sorbents could be a good strategy to overcome the technical issues associated with loss-in...
277 citations
TL;DR: In this article, a systematic approach based on the application of Fourier transform infrared spectrophotometry (FTIR) was taken, in order to quantitatively analyze the corrosion products formed in the secondary cycle of pressurized water reactors (PWR).
275 citations
TL;DR: In this paper, the authors reviewed the clay soil stabilization mechanism for the calcium-based stabilizers portland cement and lime and found that these materials modify soil properties through cation exchange, flocculation and agglomeration, and pozzolanic reaction.
Abstract: Pavement subgrades constructed with clay soils can cause significant pavement distress because of moisture-induced volume changes and low subgrade support values. Lime is well known for its ability to stabilize plastic clays; however, portland cement also provides highly effective clay stabilization, usually with the added benefit of higher strength gain. Stabilizing clays with cement or lime can improve subgrade properties at a lower cost than either removing and replacing material or increasing the base thickness to reduce subgrade stress. The clay soil stabilization mechanism for the calcium-based stabilizers portland cement and lime is reviewed. These materials modify soil properties through cation exchange, flocculation and agglomeration, and pozzolanic reaction. Additionally, cement provides hydration products, which increase the strength and support values of the subgrade materials as well as enhance the permanence of the treatment. Comparative laboratory and field performance studies by others, fo...
273 citations
Book•
01 Mar 1995
TL;DR: In this article, the authors provide a reference on the state of the art in lime stabilization of subgrade soils, subbases and base courses used primarily in roadway and airfield construction.
Abstract: This handbook provides a reference on the state of the art in lime stabilization of subgrade soils, subbases and base courses used primarily in roadway and airfield construction. The handbook is designed to provide a comprehensive though not exhaustive reference on (1) mechanisms of reaction between lime and soil; (2) mixture design; (3) engineering properties derived as a result of lime stabilization of soils and aggregates; (4) pavement thickness design considerations; (5) construction and quality control considerations; and (6) life cycle cost considerations.
253 citations
Book•
08 Jul 1998
TL;DR: In this paper, the authors present an overview of the Limestone Market and its economic aspects, including the use of Limestone in Cement Production, Limestone Processing and Dispatch, and Limestone's Use in Refining Metals.
Abstract: PRODUCTION OF LIMESTONE. Formation, Classification and Occurrence of Limestone. Physical and Chemical Properties of Limestone. Prospecting and Quarrying. Processing and Dispatch of Limestone. Sampling and Testing of Limestone. USES AND SPECIFICATIONS OF LIMESTONE. Overview and Economic Aspects of the Limestone Market. Construction and Building. Use of Limestone in Cement Production. The Use of Limestone in Agriculture. Use of Limestone in Refining Metals. Others Uses of Limestone. PRODUCTION OF QUICKLIME. Physical and Chemical Properties OF Quicklime. Raw Materials for Lime Burning (Limestone, Fuel and Refractories). Calcination of Limestone. Production of Quicklime. Processing Storage and Transport of Quicklime. Sampling and Testing of Quicklime. PRODUCTION OF SLAKED LIME. Physical and Chemical Properties of Slaked Lime. Production of Hydrated Lime. Handling and Storage of Hydrated Lime. Production of Milk of Lime and Lime Putty. Handling and Storage of Milk of Lime and Lime Putty. Sampling and Testing of Slaked Lime. USES AND SPECIFICATIONS OF LIME PRODUCTS. Overview and Economic Aspects of the Lime Market. Construction and Building. The Use of Lime in Iron and Steelmaking. Water and Sewage Treatment. Gaseous Effluents. Agriculture, Food and Food By-products. Use of Quick and Slaked Lime in the Production of Chemicals. Other Uses of Quick and Slaked Lime. SAFETY, HEALTH AND ENVIRONMENT. Control of the Environmental Effects of Lime and Limestone Production. Toxicology and Occupational Health. Annexes. Index.
252 citations