CN101653718B - Method for preparing lithium silicate material for absorbing CO2 at high temperature - Google Patents
Method for preparing lithium silicate material for absorbing CO2 at high temperature Download PDFInfo
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- CN101653718B CN101653718B CN2009100949275A CN200910094927A CN101653718B CN 101653718 B CN101653718 B CN 101653718B CN 2009100949275 A CN2009100949275 A CN 2009100949275A CN 200910094927 A CN200910094927 A CN 200910094927A CN 101653718 B CN101653718 B CN 101653718B
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- China
- Prior art keywords
- diatomite
- reaction
- high temperature
- temperature
- lithium silicate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- PAZHGORSDKKUPI-UHFFFAOYSA-N lithium metasilicate Chemical compound [Li+].[Li+].[O-][Si]([O-])=O PAZHGORSDKKUPI-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 229910052912 lithium silicate Inorganic materials 0.000 title claims abstract description 36
- 239000000463 material Substances 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 50
- 238000006243 chemical reaction Methods 0.000 claims abstract description 20
- 239000002994 raw material Substances 0.000 claims abstract description 13
- 238000002360 preparation method Methods 0.000 claims abstract description 9
- 239000011358 absorbing material Substances 0.000 claims abstract description 7
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 claims description 19
- 229910052808 lithium carbonate Inorganic materials 0.000 claims description 13
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 8
- 229910052710 silicon Inorganic materials 0.000 claims description 8
- 239000010703 silicon Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000001354 calcination Methods 0.000 claims description 2
- 238000000227 grinding Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 abstract description 8
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 5
- 239000011707 mineral Substances 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052799 carbon Inorganic materials 0.000 abstract description 2
- 238000002156 mixing Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000010521 absorption reaction Methods 0.000 description 16
- 230000000694 effects Effects 0.000 description 13
- 239000000843 powder Substances 0.000 description 12
- 238000010438 heat treatment Methods 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 229910004283 SiO 4 Inorganic materials 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 239000005431 greenhouse gas Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 229920006926 PFC Polymers 0.000 description 1
- NPYPAHLBTDXSSS-UHFFFAOYSA-N Potassium ion Chemical compound [K+] NPYPAHLBTDXSSS-UHFFFAOYSA-N 0.000 description 1
- 229910018503 SF6 Inorganic materials 0.000 description 1
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 1
- 230000000035 biogenic effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 239000001272 nitrous oxide Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 229910001414 potassium ion Inorganic materials 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003746 solid phase reaction Methods 0.000 description 1
- 238000003836 solid-state method Methods 0.000 description 1
- 239000002594 sorbent Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 1
- 229960000909 sulfur hexafluoride Drugs 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/151—Reduction of greenhouse gas [GHG] emissions, e.g. CO2
Abstract
The invention relates to a method for preparing a material absorbing CO2 at a high temperature, in particular to a method for preparing a lithium silicate material which uses infusorial earth as a raw material and absorbs CO2 at a high temperature. The method comprises the following steps: mixing the lithium silicate and the infusorial earth according to the stoichiometric coefficient of reaction, the mixture is heated, roasted and synthesized in a reacting furnace at the temperature from 600 DEG C to 900 DEG C, and obtaining the absorbing material of the lithium silicate after the reaction. The invention recovers carbon resources and reduces the discharge of CO2 aiming at the problem that a lot of CO2 at high temperature is discharged from stack gas in an electric power plant. The method uses the infusorial earth which is a low-cost natural mineral material and LiCO3 as the raw material and adopts a high-temperature solidoid method to synthesize the lithium silicate material. Compared with the prior art, the infusorial earth used as the raw material has low cost and accessibility. The invention adopts simple preparation technology and easy to realize industrialized production.
Description
Technical field
The present invention relates to prepare high temperature CO
2The method of absorbing material, particularly a kind of is the high temperature CO of raw material with diatomite
2The preparation method of absorbing material lithium metasilicate.
Background technology
Diatomite is a kind of biogenic silicastone, it mainly by ancient times diatom remains form, wherein mainly by 80%～90%, some even the diatom test that reaches more than 90% are formed, main chemical compositions is SiO
2, also have a small amount of Al
2O
3, Fe
2O
3, CaO, MgO etc.Because diatomite has characteristics such as exquisiteness, loose, light weight, porous, suction and permeability are strong; Therefore can remove solid particle, suspended particulate, colloidal particle and the bacterium in the liquid; Play the effect of filtration, purification liquid, be widely used for industries such as food, medicine.Generally speaking, diatomite is Physical Absorption as absorbent on the traditional sense, and assimilation effect is not good, therefore it is just had great significance as the research on the chemical absorbing.
In recent years, the climate change that greenhouse effects cause has become a global environment problem, more and more causes the great attention of countries in the world, and causes that the arch-criminal of greenhouse effects is exactly CO
2China is along with the quickening of process of industrialization, CO
2Discharge capacity be growing on and on.Because CO in the atmosphere
2The continuous increase of isothermal chamber gas content and cause that greenhouse effects are fairly obvious has directly caused the variation of weather.Greenhouse gases (GHG) comprise carbon dioxide (CO
2), methane (CH
4), nitrous oxide (N
2O), hydrogen fluorine carbide (HFCs), perfluocarbon (PFCs), sulfur hexafluoride (SF
6) 6 kinds, wherein to climate change effect maximum be CO
2, the warming effect of its generation accounts for 63% of the total warming effect of all greenhouse gases, and has very long characteristics of the phase that in atmosphere, retains.In addition, CO
2Marine ecology is also had very big influence, and the ocean has almost absorbed the CO of human discharging
2Half the, these CO
2The acidity that has increased the ocean injures some halobiontic existence.CO
2Main source be that the burning of fossil fuel produces, therefore seek the CO that a kind of suitable material absorbs the high temperature furnace discharging
2Has important significance for theories.
Domestic Wang Yinjie etc. are raw material with silica and lithium carbonate, adopt high-temperature solid phase reaction method under different temperatures (500 ℃～750 ℃), to synthesize and a series ofly can at high temperature directly absorb CO
2The lithium metasilicate material.Experimental result shows, calcines 6h down at 750 ℃ and can synthesize CO
2The lithium metasilicate material that absorbent properties are good.At CO
2Under the atmosphere, can reach absorption equilibrium in 750 ℃ of insulation 15min, its uptake is about 43%.In addition, they have also studied sodium ion, potassium ion mixes to lithium metasilicate absorbed CO
2Influence.
Study maximum CO at present
2High temperature sorbent mainly concentrates on lithium-based ceramic, and the lithium metasilicate material is considered to absorb CO
2Best.The preparation of present most lithium metasilicate material all is the SiO that adopts through processing
2Raw material and Li
2CO
3Mixing obtains through high temperature solid-state method, and its cost of material is higher, and preparation technology is also complicated, and the diatomite mineral resources of China are abundant at present, and the development and use degree is not high.
Up to now, the natural minerals diatomite of not seeing as yet with cheapness is that raw material prepares high temperature CO
2The report of the patent of invention of absorbing material lithium metasilicate, research document etc.
Summary of the invention
Technical problem to be solved by this invention provides a kind of high temperature and absorbs CO
2The lithium metasilicate material preparation method, it is that raw material prepares high temperature CO with natural minerals diatomite
2The absorbing material lithium metasilicate, thus the preparation cost of reduction lithium metasilicate material reaches the effect of alleviating greenhouse effects simultaneously, has reduced the cost of administering environment and ecological environment.
Solving the technical scheme that technical problem of the present invention adopts is: lithium carbonate and diatomite are mixed by the reaction metering, and the roasting that in reacting furnace, heats up obtains the lithium metasilicate absorbing material after the reaction.
The concrete technological parameter that method of the present invention is selected for use is:
Before raw material roasting reaction; Diatomite is put into moisture and the silicon shell that the Muffle furnace calcination process is fallen diatomite; Again lithium carbonate is added the water grinding with pretreated diatomite in molar ratio=1.6～2.8 ratios raw material is fully mixed, carry out drying afterwards, follow again roasting reaction in the Muffle furnace.
It is 200 ℃～500 ℃ that diatomite is put into the Muffle furnace pretreatment temperature, time 2h～4h; Lithium carbonate and pretreated diatomite are 600 ℃～900 ℃ in the temperature of Muffle furnace reaction, roasting time 2h～8h.
Synthetic reaction is following:
2Li
2CO
3+SiO
2＝Li
4SiO
4+2CO
2
The lithium metasilicate material is to CO
2Absorb:
The lithium metasilicate material for preparing in order to the top method absorbs CO
2, this lithium metasilicate material is placed thermogravimetric analyzer, at CO
2: N
2In the atmosphere of=1～5 (mol ratios), be under 400 ℃～700 ℃, carry out CO under the time in differing absorption at adsorption temp
2Absorption reaction obtains CO
2Absorptive capacity be 15%～31%.The reaction of lithium metasilicate absorbed carbon dioxide is following:
Li
4SiO
4+CO
2＝Li
2SiO
3+Li
2CO
3
Good effect of the present invention:
(1) the present invention is a raw material with the natural minerals diatomite of cheapness, makes lithium metasilicate material preparation cost relatively low, has also opened up a new field for diatomaceous utilization simultaneously.
(2) the present invention is primarily aimed at CO such as power plant
2The industry that discharge capacity is big can at high temperature directly absorb CO
2, energy savings; Reclaim carbon resource simultaneously, reduce CO
2Discharging, thus play the effect of protecting environment.
The specific embodiment
Further specify scheme of the present invention and effect through instance below.
Instance 1
At first, diatomite is put into Muffle furnace roasting preliminary treatment 2 hours, temperature is 250 ℃, removes moisture and silicon shell in the diatomite.Be that 2.1 lithium carbonate powder and preliminary treatment diatomite mix with the mole proportioning then, add water and grind, carry out drying.Under 700 ℃, lithium carbonate and diatomite roasting are put into the lithium metasilicate powder that Muffle furnace roasting reaction 4h obtains.The lithium metasilicate powder that makes is put into thermogravimetric analyzer, at CO
2: N
2Be elevated to 620 ℃ (absorption temperature) with the heating rate of 10K/min from 40 ℃ in=1 (mol ratio) atmosphere, and constant temperature 45min carries out CO
2Absorption reaction, obtain CO
2Absorptive capacity be 15.8%.
Instance 2
At first, diatomite is put into Muffle furnace roasting preliminary treatment 2.5 hours, temperature is 300 ℃, removes moisture and silicon shell in the diatomite.Be that 2.6 lithium carbonate powder and preliminary treatment diatomite mix with the mole proportioning then, add water and grind, carry out drying.Under 600 ℃, lithium carbonate and diatomite roasting are put into the lithium metasilicate powder that Muffle furnace roasting reaction 3h obtains.The lithium metasilicate powder that makes is put into thermogravimetric analyzer, at CO
2: N
2Be elevated to 620 ℃ (absorption temperature) with the heating rate of 10K/min from 40 ℃ in=1 (mol ratio) atmosphere, and constant temperature 45min carries out CO
2Absorption reaction, obtain CO
2Absorptive capacity be 30.32%.
Instance 3
At first, diatomite is put into Muffle furnace roasting preliminary treatment 2 hours, temperature is 450 ℃, removes moisture and silicon shell in the diatomite.Be that 2.1 lithium carbonate powder and preliminary treatment diatomite mix with the mole proportioning then, add water and grind, carry out drying.Under 850 ℃, lithium carbonate and diatomite roasting are put into the lithium metasilicate powder that Muffle furnace roasting reaction 2h obtains.The lithium metasilicate powder that makes is put into thermogravimetric analyzer, at CO
2: N
2Be elevated to 620 ℃ (absorption temperature) with the heating rate of 10K/min from 40 ℃ in=1 (mol ratio) atmosphere, and constant temperature 45min carries out CO
2Absorption reaction, obtain CO
2Absorptive capacity be 28.78%.
Instance 4
At first, diatomite is put into Muffle furnace roasting preliminary treatment 3.5 hours, temperature is 450 ℃, removes moisture and silicon shell in the diatomite.Be that 2.1 lithium carbonate powder and preliminary treatment diatomite mix with the mole proportioning then, add water and grind, carry out drying.Under 700 ℃, lithium carbonate and diatomite roasting are put into the lithium metasilicate powder that Muffle furnace roasting reaction 8h obtains.The lithium metasilicate powder that makes is put into thermogravimetric analyzer, at CO
2: N
2Be elevated to 620 ℃ (absorption temperature) with the heating rate of 10K/min from 40 ℃ in=1 (mol ratio) atmosphere, and constant temperature 45min carries out CO
2Absorption reaction, obtain CO
2Absorptive capacity be 27.62%.
Instance 5
At first, diatomite is put into Muffle furnace roasting preliminary treatment 2 hours, temperature is 400 ℃, removes moisture and silicon shell in the diatomite.Be that 2.1 lithium carbonate powder and preliminary treatment diatomite mix with the mole proportioning then, add water and grind, carry out drying.Under 600 ℃, lithium carbonate and diatomite roasting are put into the lithium metasilicate powder that Muffle furnace roasting reaction 6h obtains.The lithium metasilicate powder that makes is put into thermogravimetric analyzer, at CO
2: N
2Be elevated to 620 ℃ (absorption temperature) with the heating rate of 10K/min from 40 ℃ in=2 (mol ratio) atmosphere, and constant temperature 45min carries out CO
2Absorption reaction, obtain CO
2Absorptive capacity be 25.77%.
Instance 6
At first, diatomite is put into Muffle furnace roasting preliminary treatment 2 hours, temperature is 500 ℃, removes moisture and silicon shell in the diatomite.Be that 2.7 lithium carbonate powder and preliminary treatment diatomite mix with the mole proportioning then, add water and grind, carry out drying.Under 650 ℃, lithium carbonate and diatomite roasting are put into the lithium metasilicate powder that Muffle furnace roasting reaction 7 obtains.The lithium metasilicate powder that makes is put into thermogravimetric analyzer, at CO
2: N
2Be elevated to 670 ℃ (absorption temperature) with the heating rate of 10K/min from 40 ℃ in=1 (mol ratio) atmosphere, and constant temperature 45min carries out CO
2Absorption reaction, obtain CO
2Absorptive capacity be 18.27%.
Claims (1)
1. a high temperature absorbs CO
2The lithium metasilicate material preparation method, it is characterized in that: lithium carbonate and diatomite are mixed by the reaction metering, and the roasting that in reacting furnace, heats up obtains the lithium metasilicate absorbing material after the reaction; Before raw material roasting reaction; Diatomite is put into moisture and the silicon shell that the Muffle furnace calcination process is fallen diatomite; Again lithium carbonate is added the water grinding with pretreated diatomite in molar ratio=1.6～2.8 ratios raw material is fully mixed, carry out drying afterwards, then roasting reaction in Muffle furnace; It is 200 ℃～500 ℃ that diatomite is put into the Muffle furnace pretreatment temperature, times 2 h～4 h, and lithium carbonate and pretreated diatomite are 600 ℃～900 ℃ in the temperature of Muffle furnace reaction, roasting time 2 h～8 h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100949275A CN101653718B (en) | 2009-09-03 | 2009-09-03 | Method for preparing lithium silicate material for absorbing CO2 at high temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100949275A CN101653718B (en) | 2009-09-03 | 2009-09-03 | Method for preparing lithium silicate material for absorbing CO2 at high temperature |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101653718A CN101653718A (en) | 2010-02-24 |
| CN101653718B true CN101653718B (en) | 2012-03-21 |
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ID=41708299
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|---|---|---|---|
| CN2009100949275A Expired - Fee Related CN101653718B (en) | 2009-09-03 | 2009-09-03 | Method for preparing lithium silicate material for absorbing CO2 at high temperature |
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| CN (1) | CN101653718B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101885490A (en) * | 2010-07-12 | 2010-11-17 | 江西省陶瓷研究所 | Method for preparing lithium silicate material for absorbing CO2 at high temperature from micro silicon powder |
| CN102527326A (en) * | 2011-12-29 | 2012-07-04 | 天津大学 | Method using coal series kaolin to prepare high-temperature carbon dioxide adsorbent |
| CN104959132B (en) * | 2015-06-16 | 2017-09-26 | 昆明理工大学 | A kind of preparation method of carbon dioxide Ca-base adsorbent |
| CN105664841B (en) * | 2016-01-14 | 2018-01-19 | 中国矿业大学 | High temperature CO2Sorbing material Li4SiO4Hydration and calcinations method of modifying |
| CN108654555A (en) * | 2017-03-28 | 2018-10-16 | 天津工业大学 | A kind of preparation method of the positive silicic acid lithium material of absorbing carbon dioxide at high temperature |
| CN110292906B (en) * | 2019-07-30 | 2020-08-28 | 华中科技大学 | Wet grinding modified lithium silicate, preparation method thereof and application of wet grinding modified lithium silicate as adsorbent |
| CN113429196B (en) * | 2021-04-15 | 2022-08-05 | 西安交通大学 | Reaction sintering method for preparing porous Li 2 Si 2 O 5 Method for producing ceramic |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1676210A (en) * | 2005-01-21 | 2005-10-05 | 清华大学 | High active calcium-base CO2 absorbent and its preparing method |
| CN101269316A (en) * | 2008-05-06 | 2008-09-24 | 东南大学 | High-activity kalium group solid absorbing agent for removing CO2 in flue gas and preparation method thereof |
-
2009
- 2009-09-03 CN CN2009100949275A patent/CN101653718B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1676210A (en) * | 2005-01-21 | 2005-10-05 | 清华大学 | High active calcium-base CO2 absorbent and its preparing method |
| CN101269316A (en) * | 2008-05-06 | 2008-09-24 | 东南大学 | High-activity kalium group solid absorbing agent for removing CO2 in flue gas and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| JP特开2004-331794A 2004.11.25 |
| JP特开平11-253746A 1999.09.21 |
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