CN101850958A - Method for improving yield of biomass porous carbon - Google Patents
Method for improving yield of biomass porous carbon Download PDFInfo
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- CN101850958A CN101850958A CN201010034392A CN201010034392A CN101850958A CN 101850958 A CN101850958 A CN 101850958A CN 201010034392 A CN201010034392 A CN 201010034392A CN 201010034392 A CN201010034392 A CN 201010034392A CN 101850958 A CN101850958 A CN 101850958A
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- Prior art keywords
- biomass
- raw material
- porous carbon
- yield
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- 239000002028 Biomass Substances 0.000 title claims abstract description 29
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 14
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000002994 raw material Substances 0.000 claims abstract description 24
- 238000003763 carbonization Methods 0.000 claims abstract description 9
- 239000003610 charcoal Substances 0.000 claims description 11
- 230000004913 activation Effects 0.000 claims description 8
- 238000007654 immersion Methods 0.000 claims description 7
- 238000002360 preparation method Methods 0.000 claims description 5
- 235000011149 sulphuric acid Nutrition 0.000 claims description 4
- 239000001117 sulphuric acid Substances 0.000 claims description 4
- 240000008042 Zea mays Species 0.000 claims description 3
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 claims description 3
- 235000002017 Zea mays subsp mays Nutrition 0.000 claims description 3
- 235000005822 corn Nutrition 0.000 claims description 3
- 238000010298 pulverizing process Methods 0.000 claims description 3
- 239000010902 straw Substances 0.000 claims description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 2
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 2
- 244000060011 Cocos nucifera Species 0.000 claims description 2
- 235000013162 Cocos nucifera Nutrition 0.000 claims description 2
- 244000082204 Phyllostachys viridis Species 0.000 claims description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 2
- 241000209140 Triticum Species 0.000 claims description 2
- 235000021307 Triticum Nutrition 0.000 claims description 2
- 239000012190 activator Substances 0.000 claims description 2
- 239000011425 bamboo Substances 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims description 2
- 229920003023 plastic Polymers 0.000 claims description 2
- 238000007873 sieving Methods 0.000 claims description 2
- 241000609240 Ambelania acida Species 0.000 claims 1
- 229920000742 Cotton Polymers 0.000 claims 1
- 239000010905 bagasse Substances 0.000 claims 1
- -1 beanstalk Substances 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 239000003575 carbonaceous material Substances 0.000 abstract description 2
- 239000001913 cellulose Substances 0.000 abstract description 2
- 229920002678 cellulose Polymers 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000003786 synthesis reaction Methods 0.000 abstract 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- 238000002791 soaking Methods 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 238000007598 dipping method Methods 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 239000002699 waste material Substances 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 239000004449 solid propellant Substances 0.000 description 1
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- Carbon And Carbon Compounds (AREA)
Abstract
A method for improving the yield of biomass porous carbon belongs to the category of new material synthesis and processing engineering technology, and belongs to the technical field of intersection of cellulose science and carbon materials. The invention is characterized in that the biomass raw material is treated by sulfuric acid before carbonization, namely the sulfuric acid with certain concentration is adopted to soak the biomass raw material so as to improve the yield of the porous carbon. The method has the effects and benefits of low raw material price, simple production process, high yield of the prepared porous carbon, less ash content and wide application field.
Description
Technical field
The present invention relates to a kind of method that improves yield of biomass porous carbon, belong to nano material, carbon material, Mierocrystalline cellulose science, renewable energy source crossed technical.Relating generally to biomass is raw material, adopts the method for sulfuric acid immersion, prepares the technological method of high yield biomass porous carbon.
Background technology
Biomass are clean renewable resourcess, and annual biomass total amount of producing is about 1400～1,800 hundred million tons on the earth, are equivalent to 10 times of present whole world year total energy consumption.China is as a large agricultural country, and biomass and waste material thereof are very abundant.For a long time, biomass waste mainly is used as family's fuel, animal-feed or is buried as fertilizer sources in the ground, even is directly incinerated, and utilization rate of heat value is low and polluted environment.Recently relevant for utilizing preparation solid fuel such as stalk and be used for the report of combustion power generation, but, restricted it and further developed owing to its combustion heat value is lower.Therefore efficient and high value added utilization how to realize biomass and waste thereof is key subjects that are worth research.
Compare with mineral fuel, biomass volatile content height, carbon content higher (usually more than 45%), sulphur, nitrogen content are low, and ash content is few, and environmental pollution is few during burning, is one of high quality raw material of preparation porous charcoal.Both at home and abroad some scientists be that raw material has been prepared porous charcoal such as gac, carbon molecular sieve, but gained porous charcoal yield is low, seriously restricts its heavy industrialization application.Hot pressing formation process, promptly in certain temperature range, the biomass material after pulverizing is carried out the machinery pressurization, can improve the yield of porous charcoal, therefore but this method is inapplicable to the hard biomass that is difficult to pulverize, and researchs and develops a kind of yield that all biomass all are suitable for and develops skill and be necessary very much.
Summary of the invention
Purpose of the present invention is exactly to avoid above-mentioned the deficiencies in the prior art part and method that a kind of effective raising yield of biomass porous carbon is provided, and this method is all effective to all biomass.Preparation process is to be carbon source with biomass, adopts the sulfuric acid immersion treatment before the charing, has the prospect of the cheap porous charcoal of scale operation.Its major technology characteristics are undertaken by following step in preparation process:
(1) hard biomass is made bulk, obtains all raw materials below 5mm of three dimension scale; Soft biomass obtains less than 20 purpose raw materials through pulverizing, sieving.
(2) above-mentioned raw materials is immersed in the certain density sulphuric acid soln.The concentration of sulphuric acid soln is 5～50wt%, and soak time is 0.5～10 hour.
(3) drying of immersion sample.Place 120 ℃ loft drier with soaking sample, dry after 6 hours raw material is taken out, be put in the plastics bag after cooling and place in the encloses container and preserve, in order to using.
(4) charing of immersion sample.Carbonization temperature is 600～900 ℃, and carbonization time is 10～120 minutes.
(5) charing sample activation.Activation temperature is 700～900 ℃, and soak time is 10～120 minutes, and activator level is 0.1～0.5 ml/min, promptly obtains porous charcoal.
Embodiment
Below in conjunction with specific embodiment in detail technical characterstic of the present invention is described in detail:
Embodiment 1:
Being raw material (carbon 46.90wt% less than 20 purpose corn cobs, hydrogen 6.41wt%, nitrogen 0.91wt%, oxygen 45.78wt%), at raw material is 6g, vitriolic concentration is 20%, and the vitriolic amount is under the situation of 90mL, when dipping time is 5h, before carbonization yield is soaked by sulfuric acid 20.11% rises to 32.64% after the moulding, if the activation yield is in 50%, then the total recovery of porous charcoal reaches 16.32%, when soaking without sulfuric acid 10.06%.
Embodiment 2:
Being raw material (carbon 49.23wt% less than 20 purpose wheat straws, hydrogen 6.87wt%, nitrogen 1.24wt%, oxygen 42.66wt%), at raw material is 6g, vitriolic concentration is 20%, and the vitriolic amount is under the situation of 90mL, when dipping time is 5h, before carbonization yield is soaked by sulfuric acid 29.47% rises to 34.88% after the moulding, if the activation yield is in 50%, then the total recovery of porous charcoal reaches 17.44%, when soaking without sulfuric acid 14.74%.
Embodiment 3:
Bamboo with the cut growth strip is raw material (carbon 48.40wt%, hydrogen 6.32wt%, nitrogen 0.41wt%, oxygen 44.87wt%), at raw material is 6g, vitriolic concentration is 20%, and the vitriolic amount is under the situation of 90mL, when dipping time is 5h, before carbonization yield is soaked by sulfuric acid 19.49% rises to 29.76% after the moulding, if the activation yield is in 50%, then the total recovery of porous charcoal reaches 14.88%, when soaking without sulfuric acid 9.75%.
Embodiment 4:
To cut into blocky Exocarpium cocois (Cocos nucifera L) is raw material (carbon 48.15wt%, hydrogen 6.62wt%, nitrogen 0.66wt%, oxygen 44.57wt%), at raw material is 6g, vitriolic concentration is 20%, and the vitriolic amount is under the situation of 90mL, when dipping time is 5h, before carbonization yield is soaked by sulfuric acid 20.03% rises to 26.75% after the moulding, if the activation yield is in 50%, then the total recovery of porous charcoal reaches 13.38%, when soaking without sulfuric acid 10.02%.
Claims (2)
1. method that improves yield of biomass porous carbon, this method is a carbon source with biomass, it is characterized in that biomass are adopted the sulfuric acid immersion treatment before charing, its preparation process and processing condition thereof are as follows;
(1) raw-material choosing
Hard biomass is made bulk, obtains all raw materials below 5mm of three dimension scale; Soft biomass obtains less than 20 purpose raw materials through pulverizing, sieving;
(2) above-mentioned raw materials is immersed in the certain density sulphuric acid soln, the concentration of sulphuric acid soln is 5～50%, and soak time is 0.5～10 hour;
(3) drying of immersion sample
Soak sample and place 120 ℃ loft drier, dry after 6 hours raw material is taken out, be put in the plastics bag after cooling and place in the encloses container and preserve, in order to using;
(4) charing of immersion sample
Carbonization temperature is 600～900 ℃, and carbonization time is 10～120 minutes;
(5) charing sample activation
Activation temperature is 700～900 ℃, and soak time is 10～120 minutes, and activator level is 0.1～0.5 ml/min, promptly obtains porous charcoal.
2. a kind of method that improves yield of biomass porous carbon according to claim 1 is characterized in that raw material is reproducible biomass: corn cob, corn stalk, wheat straw, cotton straw, bagasse, beanstalk, bamboo, Exocarpium cocois (Cocos nucifera L), timber etc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010034392A CN101850958A (en) | 2010-01-21 | 2010-01-21 | Method for improving yield of biomass porous carbon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010034392A CN101850958A (en) | 2010-01-21 | 2010-01-21 | Method for improving yield of biomass porous carbon |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101850958A true CN101850958A (en) | 2010-10-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010034392A Pending CN101850958A (en) | 2010-01-21 | 2010-01-21 | Method for improving yield of biomass porous carbon |
Country Status (1)
| Country | Link |
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| CN (1) | CN101850958A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103922305A (en) * | 2014-03-26 | 2014-07-16 | 同济大学 | Preparation method of high nitrogen content-doped porous carbon with high specific surface area |
| CN106299387A (en) * | 2016-10-13 | 2017-01-04 | 福州大学 | Utilize the method that straw prepares Proton Exchange Membrane Fuel Cells gas-diffusion electrode |
| CN107732256A (en) * | 2017-10-10 | 2018-02-23 | 常州大学 | One kind prepares MFC electrode materials and its chemical property using agricultural wastes |
| CN108069410A (en) * | 2017-12-29 | 2018-05-25 | 中国林业科学研究院木材工业研究所 | A kind of porous carbon materials and preparation method thereof |
| CN110436460A (en) * | 2019-08-21 | 2019-11-12 | 福建省鑫森炭业股份有限公司 | A kind of active carbon and preparation method thereof for natural gas-storing |
-
2010
- 2010-01-21 CN CN201010034392A patent/CN101850958A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103922305A (en) * | 2014-03-26 | 2014-07-16 | 同济大学 | Preparation method of high nitrogen content-doped porous carbon with high specific surface area |
| CN106299387A (en) * | 2016-10-13 | 2017-01-04 | 福州大学 | Utilize the method that straw prepares Proton Exchange Membrane Fuel Cells gas-diffusion electrode |
| CN106299387B (en) * | 2016-10-13 | 2018-11-16 | 福州大学 | The method for preparing Proton Exchange Membrane Fuel Cells gas-diffusion electrode using stalk |
| CN107732256A (en) * | 2017-10-10 | 2018-02-23 | 常州大学 | One kind prepares MFC electrode materials and its chemical property using agricultural wastes |
| CN108069410A (en) * | 2017-12-29 | 2018-05-25 | 中国林业科学研究院木材工业研究所 | A kind of porous carbon materials and preparation method thereof |
| CN110436460A (en) * | 2019-08-21 | 2019-11-12 | 福建省鑫森炭业股份有限公司 | A kind of active carbon and preparation method thereof for natural gas-storing |
| CN110436460B (en) * | 2019-08-21 | 2021-01-15 | 福建省鑫森炭业股份有限公司 | Activated carbon for storing natural gas and preparation method thereof |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20101006 |