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 used a calcined clamshell (Mereterix mereterix ) as a heterogeneous catalyst to produce biodiesel from waste frying oil (WFO).
107 citations
22 Apr 2011-Metallurgical and Materials Transactions B-process Metallurgy and Materials Processing Science
TL;DR: The formation of intermediate reaction products after calcium addition to aluminum-killed steel was studied in this article, where steel samples were taken from laboratory and industrial heats before and at various times after calcium treatment.
Abstract: The formation of intermediate reaction products after calcium addition to aluminum-killed steel was studied. Steel samples were taken from laboratory and industrial heats before and at various times after calcium treatment. Inclusions were characterized by automated and manual scanning electron microscopy and X-ray microanalysis of polished cross sections and inclusions extracted by dissolution of the steel. Industrial and laboratory melts containing more than 40 parts per million (by mass) of dissolved sulfur showed calcium sulfide as the main reaction product after calcium injection, with calcium aluminates appearing later. It is proposed that the calcium aluminates are formed by reaction between the calcium sulfide and the alumina. A laboratory heat containing 7 parts per million of sulfur showed calcium oxide as the main initial calcium reaction product. A simple mechanism is proposed for the modification of alumina inclusions by calcium, considering transient CaO and CaS formation.
106 citations
TL;DR: In this article, phase purity of sol-gel-derived hydroxyapatite (HA) was explored using precursors of calcium nitrate tetrahydrate and triethyl phosphate.
106 citations
TL;DR: Experimental test work with a number of slag materials indicates that very gradual oxidation of trivalent to hexavalent chromium does occur when the slag is exposed to atmospheric oxygen, rendering a quantifiable but small portion of chromium in this much more mobile and toxic form.
106 citations
TL;DR: In this article, the authors present results of a study on chemical acceleration of a neutral granulated blast-furnace slag activated using sodium carbonate. And they show that with accelerators, compressive strength up to 15MPa can be achieved within 24h in comparison to 2.5MPa after 48h for a mix without an accelerator.
106 citations