CN103936543B - A kind of method with acetylene synchronization gain carbon-dioxide absorbent - Google Patents
A kind of method with acetylene synchronization gain carbon-dioxide absorbent Download PDFInfo
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Abstract
The present invention discloses a kind of method with acetylene synchronization gain carbon-dioxide absorbent, belongs to industrial base solid waste cycling and reutilization and low-carbon environment-friendly technical field; The method of the invention comprises the following steps: by aluminum oxide (Al
2o
3) or aluminium hydroxide (Al (OH)
3) or ANN aluminium nitrate nonahydrate (Al (NO
3)
39H
2o), after joining in carbide-feed generator with calcium carbide, water simultaneously and fully react, calcine after the carbide slag slurries mixture of acquisition is dewatered and obtain carbon-dioxide absorbent.The present invention makes full use of the process characteristic that calcium carbide hydrolysis method produces acetylene, by adding appropriate aluminum oxide or aluminium hydroxide or ANN aluminium nitrate nonahydrate material, and namely can obtain through simple dry and calcination process that absorptive capacity is high, the carbon-dioxide absorbent of good cycling stability, significant to low-carbon environment-friendly field; Present invention also offers a kind of calcium carbide hydrolysis acetylene processed produce novel treatment and the method for disposal of base solid waste carbide slag.
Description
Technical field
The present invention relates to a kind of method with acetylene synchronization gain carbon-dioxide absorbent, belong to solid waste cycling and reutilization and low-carbon environment-friendly field.
Background technology
Carbonic acid gas is as most important artificial greenhouse gases, and its total emission volumn added about 80% during 1970 to 2004.Atmospheric carbon dioxide levels rises and causes global warming, thus creates series of negative impact to physical environment and human society, and therefore carbonic acid gas problem is subject to the extensive concern of international community.According to Intergovernmental Panel on Climate Change (Intergovernmental Panel on Climate Change, IPCC) to give information display: global stationary source (carbonic acid gas year discharge scale >=0.1 Mt) the average annual total emission volumn of carbonic acid gas is 13.47 Gt, and wherein the CO2 emissions of coal-burning power plant accounts for total emission volumn 40%.China's energy consumption structure is (within 2009, coal in China accounts for 70% in primary energy source consumption structure, expects the year two thousand thirty this ratio and will be elevated to 70.32%) based on coal, and current CO2 emissions is only second to the U.S., and row occupy the whole world second.On the one hand, with the quickening of process of industrialization and the dependence to fossil energies such as coals, China's greenhouse gas emissions will continue to increase in a short time.Expect the year two thousand thirty, China's CO2 emissions will exceed the U.S.; On the other hand, China faces again huge carbon dioxide discharge-reduction pressure.The Chinese government is formal in 2009 11 years 26 days externally announces the action target controlling greenhouse gas emission, determines that the gross domestic product Carbon emission of the year two thousand twenty unit was than decline 40%-45% in 2005.Therefore, actively develop the research of carbonic acid gas control techniques in China and both contributed to alleviating the climate change problem caused because of carbonic acid gas, contribute to again the contractual capacity promoting China's carbon dioxide discharge-reduction simultaneously.Carbonic acid gas measure of control mainly comprise: (1) improves energy conversion rate and utilization ratio.(2) low-carbon energies such as nuclear energy, wind energy and hydraulic energy are promoted the use of.(3) ecosystems such as forest, soil and ocean are utilized to strengthen naturally converging of carbonic acid gas.(4) collecting carbonic anhydride and Plugging Technology Applied (Carbon dioxide Capture & Sequestration, CCS) is implemented.Compare other three kinds of measure of control, collecting carbonic anhydride and Plugging Technology Applied can fast and effeciently control atmospheric greenhouse gas concentration, and this technology has the potentiality reducing reduction of greenhouse gas discharge cost and improve reduction of greenhouse gas discharge handiness.It is reported, collecting carbonic anhydride and Plugging Technology Applied can to cut down in following global range the carbonic acid gas of energy industry is discharged 20%.2005, " special event of CCS technology " special activities of Intergovernmental Panel on Climate Change's tissue lists the achievement in research about collecting carbonic anhydride and Plugging Technology Applied in world wide, and think that collecting carbonic anhydride and Plugging Technology Applied defend Global warming " welcome " technology, finally this technology is adopted on the 12nd Conference of the Parties (COP12).
Collecting carbonic anhydride and Plugging Technology Applied are first by collecting carbonic anhydride technology, and the carbon dioxide separation of industry and relevant energy industry being discharged out, then is carried by carbon dioxide sequestration technology and seals seabed or specific geologic trap up for safekeeping.Therefore, research and development have the prerequisite that the collecting carbonic anhydride technology of obvious economic benefit and environmental benefit is successful implementation collecting carbonic anhydride and Plugging Technology Applied.Collecting carbonic anhydride method mainly comprises absorption process, absorption method, membrane separation process and separation by deep refrigeration.Wherein, Chinese scholars has carried out deep research work to the collecting carbonic anhydride technology based on calcination/carbonation reaction principle.As shown in Figure 1, this technology uses calcium oxide (CaO) base absorbant to participate in carbonation reaction (CaO+CO
2=CaCO
3) trapping flue gas in carbonic acid gas, then at a certain temperature to reaction product calcium carbonate (CaCO
3) carry out calcining and decomposing (CaCO
3=CaO+CO
2), thus the carbon dioxide obtaining high density is used for follow-up sealing up for safekeeping or recycling, realizes the regeneration of calcium oxide-based absorption agent simultaneously and enters the next carbonation reaction cycle.The calcium oxide-based absorption agent that current research is reported mainly comprises Wingdale, and (main component is CaCO
3), (main component is CaCO to calcite
3) and rhombspar (main component is CaCO
3mgCO
3).The natural crystal such as Wingdale and rhombspar belongs to Nonrenewable resources, and overexploitation will cause the havoc of the ecotopes such as geology, the hydrology and earth's surface resource.Simultaneously, because the regeneration of calcium oxide-based absorption agent depends on hot environment, research has confirmed the hole development degree of high temperature sintering phenomenon meeting impair absorption agent, therefore will the carbon dioxide absorption efficiency of calcium oxide-based absorption agent be caused constantly to decay along with increasing of cycle index.Bibliographical information: utilize natural limestone after 1000 circularly trapping carbon dioxide reactions, its remaining transformation efficiency is only 3.5%.Thus above-mentioned shortcoming significantly limit the application prospect of the Native Oxide calcium base ores such as Wingdale in carbon dioxide removal.In addition, utilize the Native Oxide calcium base ores such as Wingdale that the decomposition reaction of calcium carbonate can occur in calcination process first thus extra to produce a certain amount of carbon dioxide (be 90% calculating with calcium carbonate content, calcine 1 t Wingdale by generation 0.396 t carbonic acid gas), thus weaken the environmental benefit of the Native Oxide calcium-base absorbing agent capturing carbon dioxides such as Wingdale to a certain extent.
In order to make up the deficiency of Native Oxide calcium-base absorbing agent, a kind of environmental friendliness must be sought and reactive behavior is better than the substitute of the natural absorbent such as natural limestone.The commercial run relevant to calcium oxide material by investigation is known, and (main component is calcium hydroxide (Ca (OH) to the carbide slag discharged in calcium carbide hydrolysis legal system acetylene technological process
2)), (main component is calcium carbonate (CaCO for the white clay that discharges in papermaking process
3)) all can as the calcium oxide-based absorption agent source of capturing carbon dioxide.Wherein, the main ingredient of the carbide slag of acetylene industry discharge is calcium hydroxide, document has confirmed that the activity of calcium hydroxide cyclic absorption carbonic acid gas is obviously better than calcium carbonate, therefore there are without the carbide slag sample of any process itself potentiality of capturing carbon dioxide, but in order to obtain the carbon-dioxide absorbent having more excellent cycle reactive behavior based on carbide slag material, certain measure must be taked to modify carbide slag, thus improve the cyclical stability of its absorbing carbon dioxide further.
Carbide slag take calcium carbide as the solid by-product of raw material production acetylene, and main ingredient is calcium hydroxide, with oxide compound or the oxyhydroxide of silicon, iron, aluminium, magnesium, sulphur, phosphorus.It is reported, China's carbide slag ultimate production reaches 1,800 ten thousand tons/year, accounts for the 1:3 of global carbide slag turnout.Process and the disposal options of current carbide slag mainly comprise: (1) is filled out sea, filled out the regular stacking of ditch; (2) sell after natural subsidence; (3) calcium carbide waste slag replaces lime cement made of stones; (4) unslaked lime is produced as carbide raw material; (5) light cinder brick is produced; (6) calcium carbide waste slag is used as industrial chemicals.Carbide slag is filled out sea, the process of filling out the regular stacking of ditch and disposal options will occupy a large amount of soil at present, pollute shallow ground water and cause salting of soil, this trade waste of carbide slag can not carry out effectively utilizing and administering by above-mentioned measure, and therefore recycling is the most scientific and reasonable process of carbide slag and disposal options.So far, carbide slag recycling approach has: the patent No. is that the Chinese invention patent of ZL200710148467.0 describes a kind of method utilizing carbide slag slurries to produce high-performance solid desulfurizing agent; The patent No. is that the Chinese invention patent of ZL200610124541.0 describes a kind of method utilizing industrial waste carbide slag to produce calcium chloride; The patent No. is a kind of method that the Chinese invention patent of ZL201010615521.X describes that carbide slag produces nitrocalcite.
Along with large scale mining and the application of the fossil energies such as coal, oil, Sweet natural gas, the global warming issue that main artificial GHG carbon dioxide causes is increasingly severe, and therefore international community has carried out the deep cooperation of policy, regulation and technological layer and extensively studied in reduction of greenhouse gas discharge field.For technician, the carbon dioxide discharge-reduction technology that research and development have obvious economic benefit and environmental benefit is core missions.Comprehensively above-mentioned utilize the Native Oxide calcium-base absorbing agent cyclic absorption carbon dioxide process such as Wingdale to exist environmental benefit is low, absorption agent reduction coefficient is large and carbide slag to bring to environment as trade waste and pollutes and the problem that can not effectively utilize, the present invention is with the comprehensive regulation, raising environmental benefit is starting point, proposes a kind of method with acetylene synchronization gain carbon-dioxide absorbent.
Summary of the invention
The object of the invention is to the deficiency in order to make up carbide slag absorbing carbon dioxide, provide a kind of method with acetylene synchronization gain carbon-dioxide absorbent, the method on the one hand can convenient, the carbon-dioxide absorbent that obtains excellent reactive behavior efficiently, provide a kind of novel method of carbide slag high-efficiency resource recycling on the other hand, achieve the target of trade waste cycling and reutilization.
Method with acetylene synchronization gain carbon-dioxide absorbent of the present invention, specifically comprises the following steps:
(1) one in aluminum oxide, aluminium hydroxide, ANN aluminium nitrate nonahydrate and calcium carbide, water are joined in reactor simultaneously, wherein, the mass ratio of aluminum oxide and calcium carbide is 7:100-15:100, the mass ratio of aluminium hydroxide and calcium carbide is 10:100-20:100, the mass ratio of ANN aluminium nitrate nonahydrate and calcium carbide is 50:100-100:100, the mass ratio of water and calcium carbide is 350:100-1000:100, fully obtains carbide slag slurries mixture after reaction;
(2) dewatered by the carbide slag slurries mixture that step (1) obtains, then at 100-110 DEG C, freeze-day with constant temperature 12-24 h obtains solid-state carbide slag;
(3) the solid-state carbide slag that step (2) obtains is placed in retort furnace calcining at constant temperature 1-2 h at 850-900 DEG C to calcine, namely obtains carbon-dioxide absorbent.
The present invention utilizes X-ray diffraction (XRD) to characterize and finds that the process that calcining contains the drying carbide slag material of aluminum oxide or aluminium hydroxide or ANN aluminium nitrate nonahydrate generates C 12 A 7 (Ca
12al
14o
33).
Reaction principle of the present invention is:
When adding aluminum oxide: Ca (OH)
2=CaO+H
2o
Wherein partial CaO and aluminum oxide react: 12CaO+7Al
2o
3=Ca
12al
14o
33
When adding aluminium hydroxide: Ca (OH)
2=CaO+H
2o
Wherein partial CaO and aluminium hydroxide react: 12CaO+14Al (OH)
3=Ca
12al
14o
33+ 21H
2o
When adding ANN aluminium nitrate nonahydrate: Ca (OH)
2=CaO+H
2o
Wherein partial CaO and ANN aluminium nitrate nonahydrate react:
24CaO+28Al(NO
3)
3·9H
2O=2Ca
12Al
14O
33+21O
2+84NO
2+252H
2O
Therefore the mixture of calcium oxide and C 12 A 7 is consisted of by the material of step (3) acquisition carbon-dioxide absorbent.
According to a kind of method with acetylene synchronization gain carbon-dioxide absorbent that the present invention proposes, in described step (1), the amount of the aluminum oxide added in carbide-feed generator or aluminium hydroxide or ANN aluminium nitrate nonahydrate can ensure that in the carbon-dioxide absorbent that step (3) obtains, calcium oxide and C 12 A 7 mass ratio are in the optimum range of 65:35-85:15.
The method of the adjoint acetylene synchronization gain carbon-dioxide absorbent that the present invention proposes, because carbide slag main component is calcium hydroxide, thus in calcination process, main generation be calcium hydroxide decomposition reaction, compare and utilize Wingdale, the calcining first of the raw material such as calcite or rhombspar, the process of calcining the solid-state carbide slag of salic or aluminium hydroxide or ANN aluminium nitrate nonahydrate can not release of carbon dioxide, discovery can be measured to carbon dioxide absorption for the carbon-dioxide absorbent obtained, C 12 A 7 is as inert component, himself does not participate in the reaction of absorbing carbon dioxide, but it can effectively suppress or alleviate the intercrystalline sintering of calcium oxide as dispersion medium, therefore the cyclical stability of the novel oxidized calcium-based ascarite obtained by the present invention is improved largely.
The present invention utilizes calcium carbide hydrolysis method to produce the operational characteristic of acetylene, by adding appropriate aluminum oxide or aluminium hydroxide or ANN aluminium nitrate nonahydrate and efficient carbon-dioxide absorbent can being obtained through easy steps such as dehydration and calcinings, thus effectively compensate for and utilize assimilated efficiency decay in the Native Oxide calcium-base absorbing agent circularly trapping carbon dioxide process such as Wingdale not enough faster at present.Meanwhile, the technique utilizing the present invention to propose is prepared carbon-dioxide absorbent and is avoided the ecological damage problem that exploitation Native Oxide calcium base ore causes, and avoids the additional carbon dioxide problem that the absorption agents such as Wingdale produce in calcination process.The present invention utilizes industrial solid castoff to administer carbonated flue gas, follows the theory of the treatment of wastes with processes of wastes against one another, embodies distinct environmental benefit and economic benefit, thus has broad application prospects.
The present invention utilizes micro thermal balance, fixed bed and fluidized-bed three kinds of reactors to implement the investigation of the carbon dioxide absorption energy of the adjoint acetylene synchronization gain effective carbon-dioxide absorption agent that the present invention proposes respectively.
Beneficial effect of the present invention is:
(1) method with acetylene synchronization gain carbon-dioxide absorbent of the present invention, it utilizes industrial solid castoff to prepare effective carbon-dioxide absorption agent, reduces the discharge of carbon dioxide in flue gas;
(2) the invention provides the recycling approach for industrial solid castoff carbide slag, can effectively make up the deficiency utilizing the natural crystal capturing carbon dioxides such as Wingdale, the present invention still all has important practical significance for the recycling of carbide slag regardless of the effective elimination for carbon dioxide in flue gas;
(3) carbon-dioxide absorbent that prepared by the present invention is the mixture of calcium oxide and C 12 A 7, in calcining: in the process of carb alphanatio pi cycle capturing carbon dioxide, C 12 A 7 be not with the inert substance of carbon dioxide reaction, it is scattered between calcium oxide crystal grain as medium, therefore, compared to the carbon-dioxide absorbent such as Wingdale, rhombspar of routine, C 12 A 7 can the effective sintering of inhibited oxidation calcium in circularly trapping carbon dioxide process, improves the carbon dioxide recycle assimilating activity of absorption agent;
(4) aluminum oxide or aluminium hydroxide or ANN aluminium nitrate nonahydrate can improve the dispersing property of solid materials, therefore while calcium carbide hydrolysis acetylene processed, add the dispersiveness that aluminum oxide or aluminium hydroxide or ANN aluminium nitrate nonahydrate can improve calcium carbide particle, thus the solid-liquid contact area between strengthening calcium carbide and water, be conducive to the generating rate and the output that improve acetylene.
Accompanying drawing explanation
Fig. 1 is calcium oxide-based absorption agent circularly trapping carbonic acid gas schematic diagram;
Fig. 2 is process flow sheet of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further details, but protection scope of the present invention is not limited to described content.
Embodiment 1
With the method for acetylene synchronization gain carbon-dioxide absorbent described in the present embodiment, specifically comprise the following steps, as shown in Figure 2:
(1) aluminum oxide and calcium carbide, water are joined in reactor, wherein, the mass ratio of aluminum oxide and calcium carbide is 7:100, and the mass ratio of water and calcium carbide is 350:100 simultaneously, fully obtains carbide slag slurries mixture after reaction;
(2) dewatered by the carbide slag slurries mixture that step (1) obtains, then at 100 DEG C, freeze-day with constant temperature 24 h obtains solid-state carbide slag;
(3) the solid-state carbide slag that step (2) obtains is placed in retort furnace calcining at constant temperature 2 h at 850 DEG C to calcine, namely obtains carbon-dioxide absorbent.
Compare with existing electricity consumption standby acetylene method made of stones, the acetylene yield that the method for the invention prepares improves 7.35%.
As shown in Figure 1, micro thermal balance reactor is utilized to compared for the carbon dioxide recycle absorptive character of carbon-dioxide absorbent and the commercially available analytical pure calcium hydroxide obtained according to the present invention.The absorbent preparation that the present invention prepares is particle diameter 60-80 order, calcination reaction temperature 840-900 DEG C, calcination time 10-20 min, and calcination atmosphere is the carbonic acid gas of volume fraction 99.95%; Carbonation reaction temperature 650-700 DEG C, carbonation time 20 min, carbonizing atmosphere is the simulated flue gas that the carbonic acid gas of volume fraction 15% is equipped with 85% nitrogen, altogether examines or check the assimilated efficiency (note: utilize the CaO conversion in absorption agent to characterize carbon dioxide absorption efficiency) of 60 circularly trapping carbonic acid gas.
Result shows: (1) the 60th calcining: carb alphanatio pi cycle end, and the carbon dioxide absorption efficiency of the absorption agent that the present invention obtains and commercially available analytical pure calcium hydroxide is respectively 62.53% and 23.18%; (2) in 60 cyclic absorption carbon dioxide process, there is not obvious decay in the carbon dioxide absorption efficiency of the absorption agent that the present invention obtains, but the carbon dioxide absorption efficiency of commercially available analytical pure calcium hydroxide but by the 1st time 63.13% decay to the 60th time 23.18%, attenuation amplitude is 63.28%.
Thus show: with micro thermal balance reactor for carbon dioxide absorption energy test platform, commercially available analytical pure calcium hydroxide compared by the carbon-dioxide absorbent that the present invention obtains, and both had excellent carbon dioxide absorption efficiency, possesses again excellent circulating reaction active.
Embodiment 2
With the method for acetylene synchronization gain carbon-dioxide absorbent described in the present embodiment, specifically comprise the following steps:
(1) aluminum oxide and calcium carbide, water are joined in reactor, wherein, the mass ratio of aluminum oxide and calcium carbide is 15:100, and the mass ratio of water and calcium carbide is 1000:100 simultaneously, fully obtains carbide slag slurries mixture after reaction;
(2) dewatered by the carbide slag slurries mixture that step (1) obtains, then at 110 DEG C, freeze-day with constant temperature 12 h obtains solid-state carbide slag;
(3) the solid-state carbide slag that step (2) obtains is placed in retort furnace calcining at constant temperature 1 h at 900 DEG C to calcine, namely obtains carbon-dioxide absorbent.
Compare with existing electricity consumption standby acetylene method made of stones, the acetylene yield that the method for the invention prepares improves 6.28%.
Micro thermal balance reactor is utilized to compared for the carbon dioxide recycle absorptive character of carbon-dioxide absorbent and the commercially available analytical pure calcium carbonate obtained according to the present invention.Absorption agent particle diameter: 60-80 order, calcination reaction temperature 840-900 DEG C, calcination time 10-20 min, calcination atmosphere is the carbonic acid gas of volume fraction 99.95%; Carbonation reaction temperature 650-700 DEG C, carbonation time 20 min, carbonizing atmosphere is the simulated flue gas that the carbonic acid gas of volume fraction 15% is equipped with 85% nitrogen.Altogether examine or check the assimilated efficiency (note: utilize the CaO conversion in absorption agent to characterize carbon dioxide absorption efficiency) of 60 circularly trapping carbonic acid gas.
Result shows: (1) the 60th calcining: carb alphanatio pi cycle end, and the carbon dioxide absorption efficiency of the absorption agent that the present invention obtains and commercially available analytical pure calcium carbonate is respectively 62.53% and 16.18%; (2) in 60 cyclic absorption carbon dioxide process, there is not obvious decay in the carbon dioxide absorption efficiency of the absorption agent that the present invention obtains, but the carbon dioxide absorption efficiency of commercially available analytical pure calcium carbonate but by the 1st time 68.27% decay to the 60th time 16.18%, attenuation amplitude is 76.30%.
Thus show: with micro thermal balance reactor for carbon dioxide absorption energy test platform, commercially available analytical pure calcium carbonate compared by the carbon-dioxide absorbent that the present invention obtains, and both had excellent carbon dioxide absorption efficiency, possesses again excellent circulating reaction active.
Embodiment 3
With the method for acetylene synchronization gain carbon-dioxide absorbent described in the present embodiment, specifically comprise the following steps:
(1) aluminium hydroxide and calcium carbide, water are joined in reactor, wherein the mass ratio of aluminium hydroxide and calcium carbide is 20:100 simultaneously, and the mass ratio of water and calcium carbide is 350: 100, fully obtains carbide slag slurries mixture after reaction;
(2) dewatered by the carbide slag slurries mixture that step (1) obtains, then at 102 DEG C, freeze-day with constant temperature 14 h obtains solid-state carbide slag;
(3) the solid-state carbide slag that step (2) obtains is placed in retort furnace calcining at constant temperature 1.2 h at 860 DEG C to calcine, namely obtains carbon-dioxide absorbent.
Compare with existing electricity consumption standby acetylene method made of stones, the acetylene yield that the method for the invention prepares improves 6.57%.
Fixed-bed reactor are utilized to compared for the absorption agent of the present invention's acquisition and the carbon dioxide recycle absorptive character of commercially available Wingdale.Absorption agent particle diameter: 60-80 order, calcination reaction temperature 900-940 DEG C, calcination time 5-10 min, calcination atmosphere is the carbonic acid gas of volume fraction 99.95%; Carbonation reaction temperature 700 DEG C, carbonation time 20 min, carbonizing atmosphere is the simulated flue gas that the carbonic acid gas of volume fraction 15% is equipped with 85% nitrogen.Altogether examine or check the assimilated efficiency (note: utilize the CaO conversion in absorption agent to characterize carbon dioxide absorption efficiency) of 40 circularly trapping carbonic acid gas.
Result shows: (1) 40 circulation end, and the carbon dioxide absorption efficiency of gained absorption agent of the present invention and commercially available Wingdale is respectively 58.93% and 22.37%; In (2) 40 circularly trapping processes, there is not obvious decay in gained absorption agent of the present invention, however the carbon dioxide absorption efficiency of commercially available Wingdale but by the 1st time 69.52% decay to the 40th time 22.37%, attenuation amplitude is 67.82%.
Thus show: take fixed-bed reactor as carbon dioxide absorption energy test platform, commercially available Wingdale compared by the carbon-dioxide absorbent that the present invention obtains, and both had excellent carbon dioxide absorption efficiency, possesses again excellent circulating reaction active.
Embodiment 4
With the method for acetylene synchronization gain carbon-dioxide absorbent described in the present embodiment, specifically comprise the following steps:
(1) aluminium hydroxide and calcium carbide, water are joined in reactor, wherein, the mass ratio of aluminium hydroxide and calcium carbide is 10:100, and the mass ratio of water and calcium carbide is 1000: 100 simultaneously, fully obtains carbide slag slurries mixture after reaction;
(2) dewatered by the carbide slag slurries mixture that step (1) obtains, then at 104 DEG C, freeze-day with constant temperature 16 h obtains solid-state carbide slag;
(3) the solid-state carbide slag that step (2) obtains is placed in retort furnace calcining at constant temperature 1.4 h at 880 DEG C to calcine, namely obtains carbon-dioxide absorbent.
Compare with existing electricity consumption standby acetylene method made of stones, the acetylene yield that the method for the invention prepares improves 5.73%.
Fluidized-bed reactor is utilized to compared for the absorption agent of the present invention's acquisition and the carbonic acid gas-cyclic absorption performance of commercially available Wingdale.Absorption agent particle diameter: 120-140 order, calcination reaction temperature 900 DEG C, calcination time 5 min, calcination atmosphere is the carbonic acid gas of volume fraction 99.95%; Carbonation reaction temperature 700 DEG C, carbonation time 10 min, carbonizing atmosphere is the simulated flue gas that the carbonic acid gas of volume fraction 15% is equipped with 85% nitrogen.Altogether examine or check the assimilated efficiency (note: utilize the CaO conversion in absorption agent to characterize carbon dioxide absorption efficiency) of 60 circularly trapping carbonic acid gas.
Result shows: (1) 60 circulation end, and the carbon dioxide absorption efficiency of gained absorption agent of the present invention and commercially available Wingdale is respectively 56.47% and 18.28%; In (2) 60 circularly trapping processes, there is not obvious decay in gained absorption agent of the present invention, however the carbon dioxide absorption efficiency of commercially available Wingdale but by the 1st time 60.83% decay to the 60th time 18.28%, attenuation amplitude is 69.95%.
Thus show: take fluidized-bed reactor as carbon dioxide absorption energy test platform, commercially available Wingdale compared by the carbon-dioxide absorbent that the present invention obtains, and both had excellent carbon dioxide absorption efficiency, possesses again excellent circulating reaction active.
Embodiment 5
With the method for acetylene synchronization gain carbon-dioxide absorbent described in the present embodiment, specifically comprise the following steps:
(1) ANN aluminium nitrate nonahydrate and calcium carbide, water are joined in reactor, wherein, the mass ratio of ANN aluminium nitrate nonahydrate and calcium carbide is 50:100, and the mass ratio of water and calcium carbide is 350: 100 simultaneously, fully obtains carbide slag slurries mixture after reaction;
(2) dewatered by the carbide slag slurries mixture that step (1) obtains, then at 108 DEG C, freeze-day with constant temperature 18 h obtains solid-state carbide slag;
(3) the solid-state carbide slag that step (2) obtains is placed in retort furnace calcining at constant temperature 1.8 h at 900 DEG C to calcine, namely obtains carbon-dioxide absorbent.
Compare with existing electricity consumption standby acetylene method made of stones, the acetylene yield that the method for the invention prepares improves 6.18%.
Fluidized-bed reactor is utilized to compared for the absorption agent of the present invention's acquisition and the carbonic acid gas-cyclic absorption performance of commercially available Wingdale.Absorption agent particle diameter: 120-140 order, calcination reaction temperature 900 DEG C, calcination time 5 min, calcination atmosphere is the carbonic acid gas of volume fraction 99.95%; Carbonation reaction temperature 700 DEG C, carbonation time 10 min, carbonizing atmosphere is the simulated flue gas that the carbonic acid gas of volume fraction 15% is equipped with 85% nitrogen.Altogether examine or check the assimilated efficiency (note: utilize the CaO conversion in absorption agent to characterize carbon dioxide absorption efficiency) of 60 circularly trapping carbonic acid gas.
Result shows: (1) 60 circulation end, and the carbon dioxide absorption efficiency of gained absorption agent of the present invention and commercially available Wingdale is respectively 55.28% and 18.28%; In (2) 60 circularly trapping processes, there is not obvious decay in gained absorption agent of the present invention, however the carbon dioxide absorption efficiency of commercially available Wingdale but by the 1st time 60.83% decay to the 60th time 18.28%, attenuation amplitude is 69.95%.
Thus show: take fluidized-bed reactor as carbon dioxide absorption energy test platform, commercially available Wingdale compared by the carbon-dioxide absorbent that the present invention obtains, and both had excellent carbon dioxide absorption efficiency, possesses again excellent circulating reaction active.
Embodiment 6
With the method for acetylene synchronization gain carbon-dioxide absorbent described in the present embodiment, specifically comprise the following steps:
(1) ANN aluminium nitrate nonahydrate and calcium carbide, water are joined in reactor, wherein, the mass ratio of ANN aluminium nitrate nonahydrate and calcium carbide is 1:1, and the mass ratio of water and calcium carbide is 1000: 100 simultaneously, fully obtains carbide slag slurries mixture after reaction;
(2) dewatered by the carbide slag slurries mixture that step (1) obtains, then at 108 DEG C, freeze-day with constant temperature 18 h obtains solid-state carbide slag;
(3) the solid-state carbide slag that step (2) obtains is placed in retort furnace calcining at constant temperature 1.8 h at 900 DEG C to calcine, namely obtains carbon-dioxide absorbent.
Compare with existing electricity consumption standby acetylene method made of stones, the acetylene yield that the method for the invention prepares improves 5.28%.
Fluidized-bed reactor is utilized to compared for the absorption agent of the present invention's acquisition and the carbonic acid gas-cyclic absorption performance of commercially available Wingdale.Absorption agent particle diameter: 120-140 order, calcination reaction temperature 900 DEG C, calcination time 5 min, calcination atmosphere is the carbonic acid gas of volume fraction 99.95%; Carbonation reaction temperature 700 DEG C, carbonation time 10 min, carbonizing atmosphere is the simulated flue gas that the carbonic acid gas of volume fraction 15% is equipped with 85% nitrogen.Altogether examine or check the assimilated efficiency (note: utilize the CaO conversion in absorption agent to characterize carbon dioxide absorption efficiency) of 60 circularly trapping carbonic acid gas.
Result shows: (1) 60 circulation end, and the carbon dioxide absorption efficiency of gained absorption agent of the present invention and commercially available Wingdale is respectively 54.93% and 18.28%; In (2) 60 circularly trapping processes, there is not obvious decay in gained absorption agent of the present invention, however the carbon dioxide absorption efficiency of commercially available Wingdale but by the 1st time 60.83% decay to the 60th time 18.28%, attenuation amplitude is 69.95%.
Thus show: take fluidized-bed reactor as carbon dioxide absorption energy test platform, commercially available Wingdale compared by the carbon-dioxide absorbent that the present invention obtains, and both had excellent carbon dioxide absorption efficiency, possesses again excellent circulating reaction active.
Claims (3)
1., with a method for acetylene synchronization gain carbon-dioxide absorbent, it is characterized in that specifically comprising the steps:
(1) one in aluminum oxide, aluminium hydroxide, ANN aluminium nitrate nonahydrate and calcium carbide, water are joined in reactor simultaneously, wherein, the mass ratio of aluminum oxide and calcium carbide is 7:100-15:100, the mass ratio of aluminium hydroxide and calcium carbide is 10:100-20:100, the mass ratio of ANN aluminium nitrate nonahydrate and calcium carbide is 50:100-100:100, the mass ratio of water and calcium carbide is 350:100-1000:100, fully obtains carbide slag slurries mixture after reaction;
(2) after being dewatered by the carbide slag slurries mixture that step (1) obtains, drying obtains solid-state carbide slag;
(3) the solid-state carbide slag that step (2) obtains is placed in retort furnace to calcine, namely obtains carbon-dioxide absorbent.
2. the method with acetylene synchronization gain carbon-dioxide absorbent according to claim 1, is characterized in that: the drying conditions after the described carbide slag slurries mixture dehydration of step (2) is: freeze-day with constant temperature 12-24 h at 100-110 DEG C.
3. the method with acetylene synchronization gain carbon-dioxide absorbent according to claim 1, is characterized in that: the calcination condition of step (3) described calcining is: calcining at constant temperature 1-2 h at 850-900 DEG C.
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