EP4341227A1 - Verfahren zum einsatz von biokohle bei der herstellung von beton mit einer verbesserten co-bilanz - Google Patents
Verfahren zum einsatz von biokohle bei der herstellung von beton mit einer verbesserten co-bilanzInfo
- Publication number
- EP4341227A1 EP4341227A1 EP22761369.2A EP22761369A EP4341227A1 EP 4341227 A1 EP4341227 A1 EP 4341227A1 EP 22761369 A EP22761369 A EP 22761369A EP 4341227 A1 EP4341227 A1 EP 4341227A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- biochar
- concrete
- production
- improved
- stage
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 59
- 239000004567 concrete Substances 0.000 title claims abstract description 58
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 39
- 238000000197 pyrolysis Methods 0.000 claims abstract description 22
- 239000004568 cement Substances 0.000 claims abstract description 16
- 239000000203 mixture Substances 0.000 claims abstract description 14
- 239000011230 binding agent Substances 0.000 claims abstract description 12
- 239000000654 additive Substances 0.000 claims abstract description 9
- 239000007864 aqueous solution Substances 0.000 claims abstract description 4
- 239000002023 wood Substances 0.000 claims description 15
- 238000002156 mixing Methods 0.000 claims description 12
- 229920013724 bio-based polymer Polymers 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 229910052799 carbon Inorganic materials 0.000 claims description 8
- 239000007858 starting material Substances 0.000 claims description 7
- 239000006227 byproduct Substances 0.000 claims description 6
- 238000005469 granulation Methods 0.000 claims description 6
- 230000003179 granulation Effects 0.000 claims description 6
- 229920005610 lignin Polymers 0.000 claims description 6
- 239000004566 building material Substances 0.000 claims description 5
- 238000002309 gasification Methods 0.000 claims description 4
- 239000008187 granular material Substances 0.000 claims description 4
- 229920000642 polymer Polymers 0.000 claims description 4
- 239000004576 sand Substances 0.000 claims description 4
- 239000002893 slag Substances 0.000 claims description 4
- 239000004575 stone Substances 0.000 claims description 4
- 239000002699 waste material Substances 0.000 claims description 4
- 229920002472 Starch Polymers 0.000 claims description 3
- 229920001222 biopolymer Polymers 0.000 claims description 3
- 150000004676 glycans Chemical class 0.000 claims description 3
- 229920000747 poly(lactic acid) Polymers 0.000 claims description 3
- 229920001282 polysaccharide Polymers 0.000 claims description 3
- 239000005017 polysaccharide Substances 0.000 claims description 3
- 150000002334 glycols Chemical class 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- 235000019698 starch Nutrition 0.000 claims description 2
- 239000008107 starch Substances 0.000 claims description 2
- 239000000725 suspension Substances 0.000 claims description 2
- 238000005453 pelletization Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 239000003125 aqueous solvent Substances 0.000 description 4
- 230000000035 biogenic effect Effects 0.000 description 3
- 239000003610 charcoal Substances 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 239000008188 pellet Substances 0.000 description 3
- 239000002028 Biomass Substances 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 2
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000005862 Whey Substances 0.000 description 1
- 102000007544 Whey Proteins Human genes 0.000 description 1
- 108010046377 Whey Proteins Proteins 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 239000011381 foam concrete Substances 0.000 description 1
- 229920003041 geopolymer cement Polymers 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 239000011372 high-strength concrete Substances 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 235000014655 lactic acid Nutrition 0.000 description 1
- 239000004310 lactic acid Substances 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920002959 polymer blend Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000011376 self-consolidating concrete Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000031068 symbiosis, encompassing mutualism through parasitism Effects 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/04—Heat treatment
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
Definitions
- the invention relates to a method for using biochar in the production of concrete with an improved CC ⁇ balance, by combining binders, aggregates and biochar and possibly other additives with the addition of aqueous solvents to produce a mixture, with cement and as binders Sand, gravel, crushed stone, slag and/or recycled building material can be used as aggregates.
- the use of biochar to reduce the use of cement has the advantage that the C0 2 balance of concrete can be significantly improved.
- WO 2018203829 A1 describes a method for producing a building material, which includes the steps of combining a binder, aggregate and biochar with the addition of an aqueous solvent in order to form a mixture.
- the biochar is produced by thermally decomposing a biomass material at a temperature of 200° C. to 700° C., but preferably between 300° C. and 500° C., with the added biochar accounting for 1 to 30% of the total amount of the mixture.
- the biochar is used comprehensively as a cotton wool material or as a coating of pellets made of cotton wool material, the pellets coated with biochar being made of gypsum, clay and/or plastic. This is necessary so that the biochar, which has highly porous properties and therefore a very large surface, can simply be brought into contact with aqueous solutions. Manufacturing additional pellets and then coating them with biochar in order to be able to incorporate them into the concrete mix requires additional time, technology and costs. In addition, the production of biochar at temperatures of up to 700°C entails the risk that resin encrustations will still be present in the end product if the starting materials are very resinous, which would lead to inferior concrete if used for concrete production.
- Biochar is often a by-product of the energetic use of biomass, e.g. during wood gasification.
- Pyrolysis also makes it possible to use a wide variety of materials sensibly, which would otherwise have to be incinerated or landfilled, and whole material flows can be put to better use.
- wood chips, scrap wood chips and/or wood chips or wood chips from fresh wood without a leaf content in different size fractions can advantageously be used as starting material for the production of biochar.
- a method for the use of biochar in the production of concrete of any type and variety with an improved C02 balance was created in which binders, aggregates and biochar and possibly other additives with the addition of aqueous solvents to produce a mixture for the concrete production are used, with cement as a binder and as aggregates and additives organic and / or inorganic materials, such as Sand, gravel, crushed stone, slag and/or recycled building material are used.
- binders, aggregates and biochar and possibly other additives with the addition of aqueous solvents to produce a mixture for the concrete production are used, with cement as a binder and as aggregates and additives organic and / or inorganic materials, such as Sand, gravel, crushed stone, slag and/or recycled building material are used.
- organic and / or inorganic materials such as Sand, gravel, crushed stone, slag and/or recycled building material are used.
- a wide variety of additives such as rock flour and/or synthetic resin can also be incorporated into the concrete mix.
- biochar used is produced beforehand in a pyrolysis process at at least 800°C and with a minimum residence time in the pyrolysis process of 3 hours, so that the end product of this two-stage pyrolysis process can be made available as biochar for the concrete production process and can be fed into it.
- the biochar is produced in a two-stage pyrolysis process before it is fed to the concrete production process. In a first stage at 450°C and in a 2nd stage in a fluidized bed of a fluidized bed reactor at at least 815°C. This ensures that the biochar is free from contamination and has the final physical properties for use in concrete.
- the biochar To introduce the biochar into the mixing process of the aggregates, the binders and the aqueous solutions for the production of concrete, the biochar must be mixed with a biopolymer mixture for dust binding and to achieve mixing behavior due to its very low hydrophobic property according to the invention before being introduced into the mixing process from a suspension of at least 50% water and at most 50% of a bio-based polymer, until a saturation behavior has set in the mold, which forms biochar granules during the mixing process.
- bio-based polymers such as polylactide, lactic acid polymer, water-soluble lignin, Glycols, starch and / or polysaccharides used.
- these organic compounds are able, due to their structure and properties, to form a bond with the finely comminuted biochar and thus to granulate the biochar quickly and efficiently and make it dust-free.
- the biochar can be included quickly, effectively and dust-free in the usual mixing process in cement production.
- biochar can be made from a wide variety of organic substances with very different properties, it is possible to process these various organic lignin-containing substances in a two-stage pyrolysis process into high-quality biochar with good properties for use in concrete production.
- the two-stage pyrolysis process it is also possible to use any lignin-containing residues or waste products as the starting material for the production of biochar.
- the high temperatures and the two-stage nature of the process mean that biochar with a carbon content of at least 80% is produced and foreign bodies can be separated in front of the fluidized bed reactor, as these are significantly heavier than the intermediate product that has already formed.
- the invention will be explained in more detail later using an exemplary embodiment.
- wood chips and waste such as sawdust from a sawmill or other biogenic waste containing lignin
- a two-stage pyrolysis process of a wood-gas power plant In a first pyrolysis stage, the biogenic starting materials are fed into a combustion reactor, which pyrolyzes the biogenic raw materials at 450°C.
- the solid discharge of the first stage of the pyrolysis process as the first charcoal stage is cleaned of the residues, with the residues being removed from the process.
- the resulting first stage charcoal is fed to a second stage of the pyrolysis process.
- the charcoal that has already been produced is loaded into a floating bed reactor at approx. 815°C and any remaining resinifications and residues are charred and the resulting biochar is removed as a by-product of the wood gas power plant from the wood gasification process and fed into the concrete production process.
- the resulting biochar Before the resulting biochar is fed into the concrete mixing process, it is subjected to a crushing and then a granulation process in order to significantly improve the incorporation during the concrete mixing process and the integration of the biochar into the concrete mixture.
- the biochar is crushed to a grain size ⁇ 125 prn and, if necessary, fractionated in order to sort it for the respective concrete application.
- the fractionated biochar with its dust content is then subjected to a granulation process. Since the biochar can absorb five times its own weight in water, this process step makes it possible to bring the biochar into the concrete mixing process in a time-saving manner and to be able to carry out the mixing process as usual.
- the crushed coal is very slow to soak up water. In order to accelerate the wetting process, up to 50% of a bio-based polymer is added to the necessary water and this bio-polymer mixture is sprayed onto the biochar until the biochar has absorbed this mixture to saturation and is completely granulated.
- Polylactide for example in the form of whey, is used as the bio-based polymer. This has a high protein content but very little fat and is ideal for the granulation process.
- bio-based polymer water-soluble lignin, glycol, vegetable starch and/or polysaccharides. Due to their structure and properties, these polymers are also suitable for binding the dust in the biochar, being sucked up by the biochar and thereby granulating the finely processed biochar.
- All bio-based polymers shown are mixed with water in a ratio of up to 50% by mass to the polymer mass used and then sprayed onto the biochar during the granulation process, before they are used in the concrete preparation.
- the concrete should have a significantly improved CO 2 balance.
- Binding agents, aggregates and biochar and possibly other additives are brought together with the addition of aqueous solvents to produce a mixture, with cement being used as the binding agent and sand, gravel, crushed stone, slag and/or recycled building material being used as the aggregates.
- this specially processed biochar is produced using the two-stage pyrolysis process described above at at least 800°C and a minimum residence time in the pyrolysis process of 3 hours. It has proven advantageous to carry out the first pyrolysis stage at at least 450°C and the second stage of pyrolysis at 815°C in a fluidized bed reactor to ensure that no gumming or other impurities remain in the biochar and the biochar can be provided and supplied without hesitation for the process of concrete production after the pyrolysis subsequent crushing process and granulation process.
- the concrete with biochar not only has a significantly improved CC balance, but also has improved usage properties.
- This concrete has better soundproofing properties due to the high pore volume of the biochar used than ordinary concrete.
- the insulating properties of the concrete are also significantly improved through the use of biochar with its low thermal conductivity values.
- the compressive strength is also increased compared to conventional concrete with the same mixing ratio, but without biochar.
- Biochar can also be used as a substitute for cement in the production of high-strength concrete, or in geopolymer concrete, foam concrete, lightweight concrete and self-compacting concrete. Replacing cement with biochar reduces the need for cement, which is very expensive to produce in terms of energy, and the properties of the concrete produced with it in terms of sound absorption, breathability, watertightness, moisture regulation, insulation values and thermal conductivity are significantly improved without having to carry out further measures.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021003937 | 2021-07-30 | ||
| PCT/DE2022/000084 WO2023006136A1 (de) | 2021-07-30 | 2022-07-27 | Verfahren zum einsatz von biokohle bei der herstellung von beton mit einer verbesserten co2-bilanz |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4341227A1 true EP4341227A1 (de) | 2024-03-27 |
Family
ID=83149143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22761369.2A Pending EP4341227A1 (de) | 2021-07-30 | 2022-07-27 | Verfahren zum einsatz von biokohle bei der herstellung von beton mit einer verbesserten co-bilanz |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4341227A1 (de) |
| DE (2) | DE112022003781A5 (de) |
| WO (1) | WO2023006136A1 (de) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024231547A1 (en) * | 2023-05-09 | 2024-11-14 | Ecolocked Gmbh | Methods to characterize, treat and process biocarbon(s) and combinations thereof as a concrete ingredient replacer and concrete performance enhancer and predictor |
| DK202370313A1 (en) * | 2023-06-20 | 2025-01-24 | Y Mattec As | A modified biochar and concrete mixtures comprising modified biochar |
| EP4484399B1 (de) | 2023-06-26 | 2026-03-11 | Uzin Utz SE | Selbstnivellierende spachtelmasse mit niedrigem treibhauspotential |
| CN116969723A (zh) * | 2023-07-27 | 2023-10-31 | 同济大学 | 一种具有高效固碳性能的生物炭泡沫混凝土 |
| DE102023004258A1 (de) | 2023-10-23 | 2025-04-24 | Sto Se & Co. Kgaa | Trockenmörtelzusammensetzungen für Kleber und Putze |
| CZ310607B6 (cs) * | 2024-06-17 | 2026-01-21 | INTECORES s.r.o. | Tepelně izolační materiál pro plnění dutých stavebních prvků obsahující biouhel, způsob jeho výroby a jeho použití |
| EP4667435A1 (de) | 2024-06-19 | 2025-12-24 | Sika Technology AG | Pulverzusatzmittel mit biokohle |
| EP4724409A1 (de) | 2024-08-12 | 2026-04-15 | Sika Technology AG | Zementplatten-klebezusammensetzung mit biokohle |
| WO2026036241A1 (en) | 2024-08-12 | 2026-02-19 | Sika Technology Ag | Adhesive composition comprising biochar |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102016012746A1 (de) * | 2016-10-25 | 2018-04-26 | WindplusSonne GmbH | Vorprodukte zur Herstellung von porösen, mineralischen Leichtbaumaterialien, Verfahren zur Herstellung von porösen, mineralischen Leichtbaumaterialien und ihre Verwendung |
| CN110621634A (zh) | 2017-05-02 | 2019-12-27 | 新加坡国立大学 | 可持续的建筑材料及其制备方法和用途 |
-
2022
- 2022-07-27 WO PCT/DE2022/000084 patent/WO2023006136A1/de not_active Ceased
- 2022-07-27 DE DE112022003781.4T patent/DE112022003781A5/de active Pending
- 2022-07-27 DE DE102022002721.6A patent/DE102022002721A1/de active Pending
- 2022-07-27 EP EP22761369.2A patent/EP4341227A1/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE112022003781A5 (de) | 2024-05-08 |
| WO2023006136A1 (de) | 2023-02-02 |
| DE102022002721A1 (de) | 2023-02-02 |
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