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Calcium looping (CaL), or the regenerative calcium cycle (RCC), is a second-generation carbon capture technology. [1] It is the most developed form of carbonate looping, [2] where a metal (M) is reversibly reacted between its carbonate form (MCO 3) and its oxide form (MO) to separate carbon dioxide from other gases coming from either power generation or an industrial plant.
(Left) Dual fluidized bed design, the Darmstadt chemical looping combustion pilot plant [1] and (Right) interconnected moving bed-fluidized bed design, the Ohio State University Coal Direct Chemical Looping pilot plant [2] Chemical looping combustion (CLC) is a technological process typically employing a dual fluidized bed system. CLC operated ...
These chemical looping processes require the use of designed metal oxide oxygen carrier that has a high product selectivity and a high feedstock conversion. An example is the chemical looping selective oxidation process developed by DuPont for producing maleic anhydride from butane. The oxygen carrier used in this process is vanadium phosphorus ...
The root of the word calcination refers to its most prominent use, which is to remove carbon from limestone (calcium carbonate) through combustion to yield calcium oxide (quicklime). This calcination reaction is CaCO 3 (s) → CaO(s) + CO 2 (g). Calcium oxide is a crucial ingredient in modern cement, and is also used as a chemical flux in smelting.
Rotary lime kiln (rust-colored horizontal tube at right) with preheater, Wyoming, 2010 Traditional lime kiln in Sri Lanka. A lime kiln is a kiln used for the calcination of limestone (calcium carbonate) to produce the form of lime called quicklime (calcium oxide).
At least six senior FBI leaders have been ordered to retire, resign or be fired by Monday, according to sources briefed on the matter, extending a purge that began last week at the Justice ...
The α 2 δ gene forms two subunits: α 2 and δ (which are both the product of the same gene). They are linked to each other via a disulfide bond and have a combined molecular weight of 170 kDa. The α 2 is the extracellular glycosylated subunit that interacts the most with the α 1 subunit. The δ subunit has a single transmembrane region ...
This bowl is thought to be the site of calcium binding. [3] The beta subunit of the channel is thought to be a regulatory subunit of the channel. There are four different kinds of the beta subunit, 1, 2, 3, and, 4. Beta 2 and 3 are inhibitory, while beta 1 and 4 are excitatory, or they cause the channel to be more open than not open.