32results about How to "Low desorption temperature" patented technology

The invention belongs to the gas separation technology area, it relates to a decarbonization solution which recycles or removes the carbon dioxide gas from the mixed gas which contains carbon dioxide, said invention specially relates to an ethoxyl ethylenediamine decarbonization solution. Its characteristic lies in: the invention has designed a new compound decarbonization solution which is composed of the main absorption component, the aid absorption component, the activation component, the corrosion inhibitor, the oxidation inhibitor and the water. Among, the main absorption component is AEE, the aid absorption component is AMP, MDEA and TEA, the activation component is MEA, DEA and PZ, the corrosion inhibitor is vitriol sour sodium, the oxidation inhibitor is the sodium sulfite and the cupric acetate. The effect and the profit of the invention are that it can be used in recycling many kinds of chemical industry reaction exhaust, the carbon dioxide of the combustion flue gas and the mixed gas, may also used in removing the carbon dioxide of town gas, the natural gas and so on, the merit of the decarbonization fluid is that the absorption capacity is big, purification is high, desorption rate is big, regeneration energy consumption is low.

The invention discloses a membrane for desorbing CO2 from a water solution containing potassium bicarbonate, and a preparation method of the membrane, belonging to the technical field of pervaporationmembrane separation. The membrane consists of a base membrane and an active layer membrane, wherein the active layer membrane is prepared from polydimethylsiloxane, an active crosslinking agent and inorganic nano-material particles; the mass ratio of the active crosslinking agent to the polydimethylsiloxane is equal to 0.1-4; the mass ratio of the inorganic nano-material particles to the polydimethylsiloxane is equal to 0.005-0.1; the inorganic nano-material particles are one or more of nano SiO2, TiO2 and TiO(OH)2, and have particle sizes of 20-100 nm; the active layer membrane has a thickness of 10-70 mum. The preparation method comprises the following steps: adding the inorganic nano-material particles, the active crosslinking agent and a catalyst into a polydimethylsiloxane solution,and carrying out a crosslinking reaction to obtain a membrane solution; coating the base membrane with the membrane solution, and evaporating a solvent to form the membrane. The membrane is suitable for an aqueous solution system, realizes desorption of CO2 in the potassium hydrogencarbonate aqueous solution, and cools the desorption temperature to 70-90 DEG C.

The present invention relates to a renewable flue gas desulfurization agent and the preparation method thereof. The flue gas desulfurization agent is the aqueous solution of 1,4-bis(2-hydroxypropyl) piperazinyl sulfate containing 30% of 1,4-bis(2-hydroxypropyl) piperazinyl by mass. The flue gas desulfurization can be prepared from the of 1,4-bis(2-hydroxypropyl) piperazinyl and other raw materials, by mixing according to a certain proportioning at normal temperature. Because the pKa1 of the conjugate acid of the 1,4-bis(2-hydroxypropyl) piperazinyl is 3.8, and the pKa2 of that is 8.2, the obtained flue gas desulfurization agent achieves the advantages of large absorbing capacity, high de-absorbing ratio, low de-absorbing temperature and suitable temperature difference in the absorbing and de-absorbing process; can reduce the energy consumption in absorbing and de-absorbing process obviously, and is very suitable for the application in process of removing SO2 in discharged flue gas in coal fired power plant and so on.

A strengthening and regenerating system for a carbon dioxide capturing solution comprises a regeneration tower, a reboiler, a supersonic generator panel, a supersonic controller, a pressure sensor, a liquid position sensor, and a temperature sensor; rich liquor from an absorption tower enters the regeneration tower from the top part of the regeneration tower, then flows to the bottom part of the regeneration tower, enters the reboiler, absorbs the thermal energy there, and then is returned to the regeneration tower; when the solution submerges the supersonic generator panel, according to the liquid position information obtained by the liquid position sensor, a vibrator in the supersonic generator panel under the liquid position is started to work, then the carbon dioxide in the liquid phase is promoted to evaporate from the liquid phase through a supersonic cavitation effect, then the carbon dioxide rises to the top part of the regeneration tower and forms a pressure; and according to the pressure value measured by the pressure sensor and the temperature value measured by the temperature sensor, the supersonic controller adjusts the output frequency and power of the vibrator in the supersonic generator panel. The system can accelerate the evaporation speed of the carbon dioxide in the solution, reduces the desorption temperature, reduces the external steam consumption, improves the absorption rate of carbon dioxide and the regeneration degree of the solution, and reduces the energy consumption of each unit of carbon dioxide.

The invention discloses an aluminosilicate adsorbent and a preparation method and an application. The aluminosilicate adsorbent provided by the invention is prepared by casting the following materials: SiO2, NaAlO2, NaOH, TEAOH, CTAB and water by molar ratio of 1:(0.047-0.21):(0.048-0.18):(0.24-0.32):(0.081-0.17):(42.6-56.2). The preparation method comprises the following steps: first, mixing SiO2, NaAlO2, NaOH and TEAOH aqueous liquors, insulating for 2-10 hours at 60-160 DEG C and adding a CTAB aqueous liquor; then, insulating for 38-60 hours at 80-140 DEG C; separating, washing, drying and roasting solids to obtain the aluminosilicate adsorbent. The adsorbent is surface-hydrophilic and has a special micro / mesoporous structure, so that the vapor adsorbing capacity of the absorbent under 10%RH reaches 82mg / g which is as twice as the adsorbing capacity of a type A molecular sieve; the vapor adsorbing capacity of the absorbent under 40%RH reaches 500mg / g which is greater than that of silica gel with same humidity. The absorbent can be completely desorbed and regenerated at 85-90 DEG C, so that the demand on equipment size and energy is reduced, and the energy and material are saved remarkably. The absorbent is suitable for manufacturing rotary adsorbers in the field of gas drying and purification.

The invention relates to the technical field of resource environment and chemical engineering and especially relates to a composite absorbent for capturing carbon dioxide in flue gas based on a membrane contactor and a use method thereof. The composite absorbent is obtained by compounding of methyldiethanolamine and an alcohol amine. The alcohol amine is a polyamine containing 1-4 amido groups or imino groups. The composite absorbent can be mixed with water according to different ratios. A total amine concentration is in a range of 0.1-1mol / L. For the balance of economy and effects, the optimal total amine concentration is 0.5mol / L. The composite absorbent has a strong capability of absorption of acid gas such as CO2 under a certain condition, is superior to the traditional absorbent containing ethanol amine as a main ingredient, has the advantages of less reaction heat, low desorption temperature, stable chemical properties and no toxicity, and is conducive to industrial application.