AU2021104817A4 - Method for Desulfurizing Coal by Fenton Reagent Oxidation - Google Patents
Method for Desulfurizing Coal by Fenton Reagent Oxidation Download PDFInfo
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- AU2021104817A4 AU2021104817A4 AU2021104817A AU2021104817A AU2021104817A4 AU 2021104817 A4 AU2021104817 A4 AU 2021104817A4 AU 2021104817 A AU2021104817 A AU 2021104817A AU 2021104817 A AU2021104817 A AU 2021104817A AU 2021104817 A4 AU2021104817 A4 AU 2021104817A4
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- coal
- desulfurization
- fenton reagent
- water
- water slurry
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- 239000003245 coal Substances 0.000 title claims abstract description 140
- 230000003647 oxidation Effects 0.000 title claims abstract description 38
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 38
- 239000012028 Fenton's reagent Substances 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 28
- 230000003009 desulfurizing effect Effects 0.000 title claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 85
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 58
- 230000023556 desulfurization Effects 0.000 claims abstract description 58
- 239000002002 slurry Substances 0.000 claims abstract description 48
- 239000011259 mixed solution Substances 0.000 claims abstract description 21
- 230000001590 oxidative effect Effects 0.000 claims abstract description 14
- 239000000243 solution Substances 0.000 claims abstract description 14
- 238000006243 chemical reaction Methods 0.000 claims abstract description 13
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000003250 coal slurry Substances 0.000 claims abstract description 9
- 239000002253 acid Substances 0.000 claims abstract description 7
- 238000002156 mixing Methods 0.000 claims abstract description 4
- 238000003756 stirring Methods 0.000 claims abstract description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 16
- 239000002245 particle Substances 0.000 claims description 9
- 239000007864 aqueous solution Substances 0.000 claims description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 230000035484 reaction time Effects 0.000 claims description 5
- 239000003929 acidic solution Substances 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 abstract description 10
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000000227 grinding Methods 0.000 abstract 1
- 229910052717 sulfur Inorganic materials 0.000 description 32
- 239000011593 sulfur Substances 0.000 description 32
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 26
- 239000002351 wastewater Substances 0.000 description 6
- 239000003513 alkali Substances 0.000 description 5
- MHAJPDPJQMAIIY-UHFFFAOYSA-N hydrogen peroxide Substances OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 239000008367 deionised water Substances 0.000 description 3
- 229910021641 deionized water Inorganic materials 0.000 description 3
- 239000007800 oxidant agent Substances 0.000 description 3
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- DMBHHRLKUKUOEG-UHFFFAOYSA-N diphenylamine Chemical compound C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 229910001448 ferrous ion Inorganic materials 0.000 description 2
- TUJKJAMUKRIRHC-UHFFFAOYSA-N hydroxyl Chemical compound [OH] TUJKJAMUKRIRHC-UHFFFAOYSA-N 0.000 description 2
- LQNUZADURLCDLV-UHFFFAOYSA-N nitrobenzene Chemical compound [O-][N+](=O)C1=CC=CC=C1 LQNUZADURLCDLV-UHFFFAOYSA-N 0.000 description 2
- 125000001741 organic sulfur group Chemical group 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000000376 reactant Substances 0.000 description 2
- 239000008399 tap water Substances 0.000 description 2
- 235000020679 tap water Nutrition 0.000 description 2
- 238000001238 wet grinding Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000003421 catalytic decomposition reaction Methods 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L9/00—Treating solid fuels to improve their combustion
- C10L9/02—Treating solid fuels to improve their combustion by chemical means
Abstract
The invention relates to a method for desulfurizing coal by Fenton reagent oxidation,
which comprises the following steps: adding a certain amount of water into coal and grinding
the coal into coal water slurry with qualified granularity; adding a proper amount of ferrous
water solution into the coal water slurry, stirring, mixing and standing for 1-2 h to obtain a coal
water slurry mixed solution; adding 30% H202 solution into that mixed solution of coal wat
slurry in proportion to prepare Fenton reagent; adding acid solution to adjust pH value, and
carrying out oxidation desulfurization reaction; after that oxidation desulfurization reaction is
finished, the oxidized coal slurry is added with clear water to filter out pulverized coal, and
then dry to obtain desulfurized pulverized coal. The method disclosed by the invention uses an
OH strong oxidizing system generated by Fenton reagent which is easy to separate, low in
pollution, low in energy consumption and high in efficiency to carry out desulfurization, and
provides an environment-friendly and efficient desulfurization method for coal desulfurization
before combustion.
Description
Method for Desulfurizing Coal by Fenton Reagent Oxidation
The invention relates to the technical field of oxidation desulfurizers, in
particular to a method for desulfurizing coal by oxidizing Fenton reagent, and a
method for oxidizing and removing total sulfur of coal by utilizing hydroxyl radical
with strong oxidation generated by Fenton reagent.
Because China's fuel is mainly coal, the current air pollution in China is still
dominated by soot pollution. Every year, 90% of sulfur dioxide in the atmosphere of
China comes from coal combustion. The existing coal desulfurization technologies
are divided according to the combination point with combustion: A. desulfurization
before combustion: coal desulfurization; B. desulfurization in combustion:
desulfurization in furnace; C. desulfurization after combustion: flue gas
desulfurization. Desulfurization of coal before combustion is the source technology of
clean coal technology, which can not only desulfurize but also reduce ash, at the same
time, it can also improve the utilization efficiency of heat energy, and the cost is
lower than that of desulfurization during combustion and after combustion.
Nowadays, flotation method has been widely used to reduce sulfur content in coal, but
there are still problems of high sulfur content and limited application after washing
high sulfur coal. It is reported in the literature that Fe 3', H202, HN3, HNO-HAC and
other oxidants are used for oxidation desulfurization treatment, which can effectively
remove most inorganic sulfur and some organic sulfur in raw coal under mild experimental reaction conditions. However, due to the high cost or pollution, it is difficult to realize industrialization. Therefore, when the market demand for low-sulfur coal is short of high-sulfur coal, the existing coal desulfurization technology cannot meet the demand for desulfurization.
The invention provides a method for desulfurizing coal by Fenton reagent
oxidation, which aims to solve that problems of high cost, environmental pollution
and difficulty in realizing industrialization of the existing desulfurization method.
Technical scheme:
The invention relates to a method for desulfurizing coal by Fenton reagent
oxidation, which comprises the following steps:
1) Coal is added with a certain amount of water and ground into coal water slurry
with qualified granularity;
2) Adding a proper amount of ferrous aqueous solution into the coal water slurry
obtained in the step 1), stirring, mixing and standing for 1-2 h to obtain the coal water
slurry to the coal water slurry mixed solution;
3) Adding 30% H202 solution into the coal-water slurry mixed solution obtained
in step 12) to prepare Fenton reagent, and then adding acid solution to adjust the pH
value to carry out oxidation desulfurization reaction;
4) After that oxidation desulfurization reaction in step 3), adding clear water to
the oxidized coal slurry to filter out pulverized coal, and drying again to obtain
desulfurize pulverized coal.
In step 1), the added amount of reclaimed water is 40±5% based on the mass of
coal, and the qualified particle size is less than or equal to 0.106 mm.
The ferrous aqueous solution in step 2) is FeS047H20, and its dosage is 1-2%
based on the mass of coal.
The Fenton reagent in step 3) is a mixed solution formed by standard Fenton
reagent in an acidic solution with pH = 2-4.
The final mass percentage of coal water slurry is 20-30% after Fenton reagent is
added into the coal water slurry mixed solution in step 3).
The H202 in step 3) is 30% H202, and the dosage of 30% H202 is 6-12% based
on the coal water slurry.
The acid solution in step 3) is sulfuric acid or hydrochloric acid, and the time for
oxidation desulfurization reaction is 12-24 h.
Compared with the prior art, the method disclosed by the invention uses an OH
strong oxidizing system generated by Fenton reagent which is easy to separate, low in
pollution and energy consumption while high in efficiency for desulfurization in order
to provide an environment-friendly and efficient desulfurization method for coal
desulfurization before combustion.
Figure 1 is an infrared spectrogram before desulfurization of coal;
Figure 2 is an infrared spectrogram of coal desulfurized by this method.
In order to explain the embodiment of the present invention and the technical
scheme in the prior art more clearly, the technical scheme of the present invention
will be described in detail below. Obviously, the described examples are only some
embodiments of the present invention, but not all embodiments. Based on the
embodiments of the present invention, all other embodiments obtained by ordinary
technicians in the field without creative labour belong to the scope of protection of the
present invention.
It is found that the mixed solution of Fenton reagent-hydrogen peroxide (H202)
and ferrous ions has strong oxidizability, which can oxidize organic compounds such
as carboxylic acids, alcohols and esters into inorganic state, and the oxidation effect is
very remarkable. At present, it has been widely used in the treatment of printing and
dyeing wastewater, oily wastewater, phenol-containing wastewater, coking
wastewater, nitrobenzene-containing wastewater and diphenylamine wastewater.
When Fenton discovered Fenton reagent, it was not clear what oxidant was produced
by the reaction of hydrogen peroxide and ferrous ions, which had such strong
oxidation ability. Later, it was assumed that hydroxyl radicals might be produced in
the reaction, otherwise, the oxidation would not be so strong. The application utilizes
the strong oxidizability of OH to oxidize and remove sulfur from pulverized coal.
A method for desulfurization by oxidizing coal with Fenton reagent adopts
standard Fenton reagent- Fe 2 + / H202 mixed solution, and the OH generated by Fe 2 +
catalytic decomposition of H202 has strong oxidizability, and the sulfur in pulverized
coal is removed by oxidation. The remarkable feature of Fenton reagent oxidation process for desulfurization and purification of coal is that it is carried out at normal pressure and temperature. It has the advantages of simple operation process, easily available reactants, low cost, no need of complicated equipment and environmental friendliness. Fenton reagent oxidation desulfurization and purification process of coal has a good prospect for industrial development and application.
A method for desulfurizing coal by Fenton reagent oxidation, which comprises
the following steps:
1) Coal is added with a certain amount of water and ground into coal water slurry
with qualified granularity;
2) Adding a proper amount of ferrous aqueous solution into the coal water slurry
obtained in the step 1), stirring, mixing and standing for 1-2 h to obtain the coal water
slurry to the coal water slurry mixed solution;
3) Adding 30% H202 solution into the coal-water slurry mixed solution obtained
in step 12) to prepare Fenton reagent, and then adding acid solution to adjust the pH
value to carry out oxidation desulfurization reaction;
4) After that oxidation desulfurization reaction in step 3), adding clear water to
the oxidized coal slurry to filter out pulverized coal, and drying again to obtain
desulfurize pulverized coal.
The water in this application is tap water because the cost of tap water is
relatively low, and the experimental results are not affected. Other water with higher
purity (such as deionized water, purified water, etc.) is also applicable, but the cost is
higher.
In step 1), the added amount of reclaimed water is 40±5% based on the mass of
coal, and the qualified particle size is less than or equal to 0. 106 mm.
The ferrous aqueous solution in step 2) is FeSO4-7H20, and its dosage is 1-2%
based on the mass of coal.
The Fenton reagent in step 3) is a mixed solution formed by standard Fenton
reagent Fe 2 + / H202 in an acidic solution with pH = 2-4.
The Fenton reagent use Fe 2 + produced by FeSO4-7H20 as catalyst, and OH
(hydroxyl radical) produced by decomposition of H202 as oxidant.
The final mass percentage of coal water slurry is 20-30% after Fenton reagent is
added into the coal water slurry mixed solution in step 3).
The H202 in step 3) is 30% H202, and the dosage of 30% H202 is 6-12% based
on the coal water slurry.
The acid solution in step 3) is sulfuric acid or hydrochloric acid.
The oxidation desulfurization reaction time in step 3) is 12-24 h.
Example 1:
Took 100 g of pulverized coal and wet milled with a ball mill at 550-600r/min
and 35% (w) water for 60 min to produce coal water slurry, and the particle size
distribution range was mainly below 0.106 mm.
Weighed FeS4-7H20, the dosage of which was 1.5 g according to the mass of
coal, and mixed it with coal water slurry and let it stand for 1 h.
When 30% H202 was added according to the total mass of coal water slurry and
water, and its adding amount was 6%.
The final mass percentage of water in the coal slurry mixed solution was
%-80%.
The pH value was adjusted to 2 with sulfuric acid.
Oxidation desulfurization reaction time was 24 h.
After oxidation, coal powder was filtered from coal water slurry.
Coal dust filtered out after oxidation desulfurization was washed to neutrality
with water, filtered out again and dried.
According to GB/T 214-2007 Methodfor Determination of Total Sulfur in Coal,
the sulfur content of high-sulfur coal before treatment was 3.12%, the average sulfur
content of clean coal after desulfurization was 2.611%, and the desulfurization rate
was 16.3%.
Example 2:
Took 100 g of pulverized coal and wet ground with a ball mill at 550-600r/min
and 45% water for 60min, and the particle size distribution range was mainly below
0.106mm..
Weighed FeS047H20, the dosage of which was 2.0 g based on the mass of coal,
and mixed it with coal water slurry, then let it stand for 2 h.
When 30% H202 was added according to the total mass of coal water slurry and
water, and its adding amount was 12%.
The final mass percentage of water in the coal slurry mixed solution was
%-70%.
The pH value was adjusted to 4 with sulfuric acid.
Oxidation desulfurization reaction time was 12 h.
After oxidation, coal powder was filtered from coal water slurry.
Alkali liquor was added to the pulverized coal filtered out after oxidation
desulfurization to adjust it to neutrality, washed with water, filtered out again, and
drying.
According to GB/T 214-2007 Methodfor Determination of Total Sulfur in Coal,
the sulfur content of high-sulfur coal before treatment was 2.5%, the average sulfur
content of clean coal after desulfurization was 2.005%, and the desulfurization rate
was 19.8%.
Example 3:
Took 100 g of pulverized coal and wet milled with a ball mill at 370-380 r/min
and 40% water (by mass) for 60 min to produce coal water slurry, and the particle size
distribution range was mainly between 0.08-0.106 mm.
Weighed FeS047H20, the dosage of which was 2.5 g based on the mass of coal,
and mixed it with coal water slurry, then let it stand for 1.5 h.
When 30% H202 was added according to the total mass of coal water slurry and
water, and its adding amount was 12%.
The final mass percentage of water in the coal slurry mixed solution was
%-60%.
The pH value was adjusted to 3.5 with sulfuric acid.
Oxidation desulfurization reaction time was 24 h.
After oxidation, coal powder was filtered from coal water slurry.
Alkali liquor was added to the pulverized coal filtered out after oxidation
desulfurization to adjust it to neutrality, washed with water, filtered out again, and
drying.
According to GB/T 214-2007 Methodfor Determination of Total Sulfur in Coal,
the sulfur content of high-sulfur coal before treatment was 2.5%, the average sulfur
content of clean coal after desulfurization was 1.85%, and the desulfurization rate was
26%.
Comparative example
The sulfur content of a coal was 1.5%, and 100 g of coal sample was accurately
weighed. The coal sample was ground and sieved to less than 50 meshes, and then
placed in a strong alkali solution and stirred evenly to form coal water slurry, which
was left standing for 6 h. After 6 h, rinse repeatedly with deionized water to
neutrality, filter, dry and weigh. The sulfur content of cleaned coal after electrolysis
was 1.26%, and the removal rate was 16%.
The experimental method: the sulfur content of a coal was 1.5% (the same as the
coal used in the comparative experiment), and 100 g of coal water slurry was prepared
by wet grinding with a ball mill at 370-380r/min and 40% water (by mass) for 60min,
and the particle size distribution range was mainly 0.08-0.106mm mm.
Weigh FeS047H20, the dosage of which was 2.5 g according to the mass of coal,
and mix it with coal water slurry, and then let it stand for 2 h.
When 30% H202 was added according to the total mass of coal water slurry and
water, and its adding amount was 12%.
The final mass percentage of water in the coal slurry mixed solution was
%-60%.
The pH value was justed to 3.0 with sulfuric acid.
Comparative example
The sulfur content of a coal was 1.5%, and 100 g of coal sample was accurately
weighed. The coal sample was ground and sieved to less than 50 meshes, and then
placed in a strong alkali solution and stirred evenly to form coal water slurry, which
was left standing for 6 h. After 6 h, rinsed it repeatedly with deionized water to
neutrality, filtered, dried and weighed. The sulfur content of cleaned coal after
electrolysis was 1.26%, and the removal rate was 16%.
The experimental method: the sulfur content of a coal was 1.5% (the same as the
coal used in the comparative example), and 100 g of coal water slurry was prepared
by wet grinding with a ball mill at 370-380 r/min and 40% water (by mass) for 60
min, and the particle size distribution range was mainly 0.08-0.106 mm.
Weighed FeS047H20, the dosage of which was 2.5 g according to the mass of
coal, and mixed it with coal water slurry, and then let it stand for 2 h.
When 30% H202 was added according to the total mass of coal water slurry and
water, and its adding amount was 12%.
The final mass percentage of water in the coal slurry mixed solution was
%-60%.
The pH value was adjusted to 3.0 with sulfuric acid.
After oxidation, coal powder was filtered from coal water slurry.
Alkali liquor was added to the pulverized coal filtered out after oxidation
desulfurization to adjust it to neutrality, washed with water, filtered out again, and
drying.
According to GB/T 214-2007 Methodfor Determination of Total Sulfur in Coal,
the sulfur content of high-sulfur coal before treatment was 1.5%, the average sulfur
content of clean coal after desulfurization was 1.13%, and the desulfurization rate was
24.5%.
Comparing fig. 1 with fig. 2, it can be seen that the absorption peaks of
419.78cm-1 and 469.76cm-1 disappeared in fig. 2 are organic sulfur -S-S-, -SH and
FeS, so it can be seen that the sulfur content decreases after desulfurization by this
method. To draw a conclusion, the method has the advantages of mild reaction
conditions, readily available reactants, low cost, simple operation, environmental
friendliness and the like.
The above examples only express several embodiments of the present invention,
and their descriptions are specific and detailed, but they cannot be understood as
limiting the scope of the patent of the present invention. It should be pointed out that,
for ordinary technicians in the field, without departing from the concept of the present
invention, besides the experimental conditions of limited water addition amount,
particle size, hydrogen peroxide addition amount, ferrous aqueous solution addition
amount and limited pH range in the above embodiments, the purpose of
desulfurization or cost reduction can also be achieved through limited experiments,
which also belongs to the protection scope of the present invention.
Claims (8)
1. The invention relates to a method for desulfurizing coal by Fenton reagent
oxidation, which is characterize by comprising the following steps:
1) Coal is added with a certain amount of water and ground into coal water slurry
with qualified granularity;
2) Adding a proper amount of ferrous aqueous solution into the coal water slurry
obtained in the step 1), stirring, mixing and standing for 1-2 h to obtain the coal water
slurry to the coal water slurry mixed solution;
3) Adding 30% H202 solution into the coal-water slurry mixed solution obtained
in step 12) to prepare Fenton reagent, and then adding acid solution to adjust the pH
value to carry out oxidation desulfurization reaction;
4) After that oxidation desulfurization reaction in step 3), adding clear water to
the oxidized coal slurry to filter out pulverized coal, and drying again to obtain
desulfurize pulverized coal.
2. The method for desulfurization by oxidizing coal with Fenton reagent
according to claim 1 is characterized in that: in step 1), the added amount of water is
±5% based on the mass of coal, and the qualified particle size is less than or equal
to 0.106 mm.
3. The method for desulfurization by oxidizing coal with Fenton reagent
according to claim lis characterized in that the ferrous aqueous solution in step 2) is
FeS0O47H20, and its dosage is 1-2% based on the mass of coal.
4. The method for desulfurization by oxidizing coal with Fenton reagent
according to claim 1 is characterized in that the Fenton reagent in step 3) is a mixed
solution formed by standard Fenton reagent in an acidic solution with pH=2-4.
5. The method for desulfurization by oxidizing coal with Fenton reagent
according to claim 1 is characterized in that the final mass percentage of coal water
slurry is 20-30% after Fenton reagent is added to the coal water slurry mixed solution
in step 3).
6. The method for desulfurization by oxidizing coal with Fenton reagent
according to claim 1, characterized in that the H202 in step 3) is 30% H202, and the
dosage of 30% H202 is 6-12% based on coal water slurry.
7. The method for desulfurization by oxidizing coal with Fenton reagent
according to claim 1 is characterized in that the acid solution in step 3) is sulfuric acid
or hydrochloric acid.
8. The method for desulfurization by oxidizing coal with Fenton reagent
according to claim 1 is characterized in that the oxidation desulfurization reaction
time in step 3) is 12-24 h.
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| Application Number | Priority Date | Filing Date | Title |
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| AU2021104817A AU2021104817A4 (en) | 2021-08-02 | 2021-08-02 | Method for Desulfurizing Coal by Fenton Reagent Oxidation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2021104817A AU2021104817A4 (en) | 2021-08-02 | 2021-08-02 | Method for Desulfurizing Coal by Fenton Reagent Oxidation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU2021104817A4 true AU2021104817A4 (en) | 2021-09-30 |
Family
ID=77857848
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|---|---|---|---|
| AU2021104817A Ceased AU2021104817A4 (en) | 2021-08-02 | 2021-08-02 | Method for Desulfurizing Coal by Fenton Reagent Oxidation |
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| Country | Link |
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2021
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