摘要:
A novel blend of piperazine (PZ) and a second amine compound is provided as a superior solvent for CO2 capture from coal-fired flue gas. Blending PZ with various second amine compounds can remediate the precipitation issue of concentrated PZ while maintaining its high CO2 absorption capacity and rate, and high resistance to oxidative degradation.
摘要:
The carbon dioxide recovery method and apparatus are capable of reducing regeneration energy and operating cost, and structurally advantageous. An absorber has first and second absorbing sections where a gas is supplied through the first absorbing section to the second absorbing section. A regenerator has first and second regenerating sections. The first regenerating section has an external heater and the second regenerating section is heated by the gas discharged from the first regeneration section. The absorbing liquid circulates between the second absorbing section and the first regenerating section in a circulation system, and a branch system allows a part of the absorbing liquid to flows from the second absorbing section through the first absorbing section and the second regenerating section successively to the first regenerating section. The recovery gas discharged from the regenerator is compressed, and its heat is recovered and supplied to the regenerator by heat exchange with the absorbing liquid.
摘要:
An acid gas absorbent of which recovery amount of acid gas such as carbon dioxide is high, and an acid gas removal device and an acid gas removal method using the acid gas absorbent are provided. The acid gas absorbent of the embodiment comprising at least one type of tertiary amine compound represented by the following general formula (1). (In the above-stated formula (1), either one of the R 1 , R 2 represents a substituted or non-substituted alkyl group of which carbon number is 2 to 5, and the other one represents a substituted or non-substituted alkyl group of which carbon number is 1 to 5. The R 3 represents a methyl group or an ethyl group, and the R 4 represents a hydroxyalkyl group. The R 1 , R 2 may either be the same or different, and they may be coupled to form a cyclic structure.) The acid gas aborbent may also be a secondary amine.
摘要:
The invention provides a process for reducing the carbon dioxide concentration of a carbon dioxide-containing gas which process comprises, in a first stage, contacting the carbon dioxide-containing gas with a treating solution comprising an alkali metal carbonate and/or hydroxide and with a catalyst to promote the absorption of carbon dioxide to form a second solution comprising an alkali metal carbonate and bicarbonate and, in a second stage, contacting the second solution with a carbonatable silicate-containing material comprising an alkaline earth cation capable of forming an insoluble carbonate to produce silica and a solid carbonate comprising the cation and to regenerate a solution comprising alkali metal carbonate.
摘要:
A method of sequestering a multi-element gas emitted by an industrial plant is described herein, the method comprising: contacting a solution, including a first reactant comprising a multi-element gas emitted by an industrial plant and at least one gas absorber comprising nitrogen, for example ammonia or an amine, with a solid, including a second reactant, under conditions that promote a reaction between the first reactant and the second reactant to provide a first product, which incorporates one or more elements of the multi-element gas, thereby sequestering the multi-element gas.
摘要:
CO 2 is absorbed from a gas mixture by contacting the gas mixture with an absorption medium comprising at least water as a solvent and at least one amine of the formula (I) in which R 1 is an aliphatic radical having 2 to 6 carbon atoms and at least one amino group, and R 2 is hydrogen, a C 1-4 -alkyl radical or an R 1 radical.
摘要:
Ein Verfahren zur Absorption von CO 2 aus einer Gasmischung durch in Kontakt bringen der Gasmischung bei einem anfänglichen Partialdruck von CO 2 von 0,01 bis 0,6 bar mit einem Absorptionsmedium umfassend Wasser und ein Amin der Formel (I)
worin R ein n-Alkylrest mit 1 bis 4 Kohlenstoffatomen ist, lässt sich ohne Ausfällung eines Feststoffs bei der Absorption von CO 2 betreiben.