CN115717088B - No. 75 coal-based aviation gasoline composition and preparation method thereof - Google Patents
No. 75 coal-based aviation gasoline composition and preparation method thereof Download PDFInfo
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- 239000003245 coal Substances 0.000 title claims abstract description 110
- 239000003502 gasoline Substances 0.000 title claims abstract description 67
- 239000000203 mixture Substances 0.000 title claims abstract description 41
- 238000002360 preparation method Methods 0.000 title abstract description 11
- 239000003208 petroleum Substances 0.000 claims abstract description 22
- 238000002156 mixing Methods 0.000 claims description 22
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 17
- 150000004945 aromatic hydrocarbons Chemical class 0.000 claims description 17
- 229910052799 carbon Inorganic materials 0.000 claims description 17
- 239000004215 Carbon black (E152) Substances 0.000 claims description 16
- 229930195733 hydrocarbon Natural products 0.000 claims description 16
- 150000002430 hydrocarbons Chemical class 0.000 claims description 16
- 238000005516 engineering process Methods 0.000 claims description 15
- 238000002407 reforming Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 11
- 239000003963 antioxidant agent Substances 0.000 claims description 10
- 230000003078 antioxidant effect Effects 0.000 claims description 10
- 238000004821 distillation Methods 0.000 claims description 10
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 claims description 6
- 238000005194 fractionation Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 4
- MRMOZBOQVYRSEM-UHFFFAOYSA-N tetraethyllead Chemical compound CC[Pb](CC)(CC)CC MRMOZBOQVYRSEM-UHFFFAOYSA-N 0.000 claims description 4
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 claims description 3
- 238000001833 catalytic reforming Methods 0.000 claims description 3
- DKCPKDPYUFEZCP-UHFFFAOYSA-N 2,6-di-tert-butylphenol Chemical compound CC(C)(C)C1=CC=CC(C(C)(C)C)=C1O DKCPKDPYUFEZCP-UHFFFAOYSA-N 0.000 claims description 2
- BGNXCDMCOKJUMV-UHFFFAOYSA-N Tert-Butylhydroquinone Chemical compound CC(C)(C)C1=CC(O)=CC=C1O BGNXCDMCOKJUMV-UHFFFAOYSA-N 0.000 claims description 2
- 230000029936 alkylation Effects 0.000 claims description 2
- 238000005804 alkylation reaction Methods 0.000 claims description 2
- 238000005504 petroleum refining Methods 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- 238000013329 compounding Methods 0.000 claims 1
- 239000000446 fuel Substances 0.000 abstract description 9
- 239000002994 raw material Substances 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 18
- TVMXDCGIABBOFY-UHFFFAOYSA-N octane Chemical compound CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 13
- 150000001924 cycloalkanes Chemical class 0.000 description 6
- 238000009472 formulation Methods 0.000 description 5
- 238000009835 boiling Methods 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 150000001336 alkenes Chemical class 0.000 description 3
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 description 2
- NHTMVDHEPJAVLT-UHFFFAOYSA-N Isooctane Chemical compound CC(C)CC(C)(C)C NHTMVDHEPJAVLT-UHFFFAOYSA-N 0.000 description 2
- BZLVMXJERCGZMT-UHFFFAOYSA-N Methyl tert-butyl ether Chemical compound COC(C)(C)C BZLVMXJERCGZMT-UHFFFAOYSA-N 0.000 description 2
- AFBPFSWMIHJQDM-UHFFFAOYSA-N N-methylaniline Chemical compound CNC1=CC=CC=C1 AFBPFSWMIHJQDM-UHFFFAOYSA-N 0.000 description 2
- 235000010354 butylated hydroxytoluene Nutrition 0.000 description 2
- RWGFKTVRMDUZSP-UHFFFAOYSA-N cumene Chemical compound CC(C)C1=CC=CC=C1 RWGFKTVRMDUZSP-UHFFFAOYSA-N 0.000 description 2
- JVSWJIKNEAIKJW-UHFFFAOYSA-N dimethyl-hexane Natural products CCCCCC(C)C JVSWJIKNEAIKJW-UHFFFAOYSA-N 0.000 description 2
- QWTDNUCVQCZILF-UHFFFAOYSA-N isopentane Chemical compound CCC(C)C QWTDNUCVQCZILF-UHFFFAOYSA-N 0.000 description 2
- IVSZLXZYQVIEFR-UHFFFAOYSA-N m-xylene Chemical group CC1=CC=CC(C)=C1 IVSZLXZYQVIEFR-UHFFFAOYSA-N 0.000 description 2
- JJYPMNFTHPTTDI-UHFFFAOYSA-N 3-methylaniline Chemical compound CC1=CC=CC(N)=C1 JJYPMNFTHPTTDI-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 239000007841 coal based oil Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- AFABGHUZZDYHJO-UHFFFAOYSA-N dimethyl butane Natural products CCCC(C)C AFABGHUZZDYHJO-UHFFFAOYSA-N 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000004250 tert-Butylhydroquinone Substances 0.000 description 1
- 235000019281 tert-butylhydroquinone Nutrition 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
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- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The invention relates to a No. 75 coal-based aviation gasoline composition, which comprises the following components in terms of total mass: 6-25% of coal-based reformate, 10-30% of coal-based reformate topped oil, 25-45% of coal-based naphtha and 20-40% of petroleum-based alkylated gasoline. The components are evenly mixed to prepare the finished product. Compared with the prior art, the 75 # coal-based aviation gasoline mainly takes coal as a raw material source, can meet all index requirements on 75 # aviation gasoline in GB 1787-2018 aviation piston engine fuel, widens the raw material source of 75 # aviation gasoline, is beneficial to enriching the energy structure of aviation gasoline, ensures the energy safety of China, has lower cost and simple preparation method, and has industrial application prospect and remarkable social benefit.
Description
Technical Field
The invention belongs to the field of fuel oil, and particularly relates to a coal-based aviation gasoline composition and a preparation method thereof.
Background
Aviation gasoline, also known as aviation piston engine fuel, is mainly used in aircraft equipped with reciprocating piston engines, such as armed helicopters in the military field, unmanned aerial vehicles, primary coaches, and agricultural aircraft in the general aviation field, meteorological engines, exploration engines, and the like. Compared with developed countries such as Europe and America, the development of the general aviation field of China is slow, the general aviation aircrafts and general aviation airports are only less than 5% of the United states, but with the gradual advancement of low-altitude airspace management reform of China, the general aviation aircrafts continuously develop at a high speed at an increase rate of more than 20% per year. Correspondingly, aviation gasoline is used as fuel in the general aviation field, the consumption of aviation gasoline also keeps the growth rate of more than 15%, and the high-speed growing consumption demand is still kept in the future. Therefore, the field attracts more research, for example, patent CN 106398783A proposes 100 # lead-free aviation gasoline and a preparation method thereof, industrial isopentane, light alkylated gasoline, industrial isooctane, toluene, m-xylene, isopropylbenzene, aniline, N-methylaniline and m-methylaniline are used as blending components, the blending products do not contain lead, the future requirement on environmental protection is met, but the blending components are more and mostly pure component petrochemical products, the cost is higher, the nitride is more, and more nitrogen oxide pollutants can be generated.
In GB 1787-2018 aviation piston engine fuel, 5 types of aviation gasoline are specified, namely 75 # aviation gasoline, 95 # aviation gasoline, 100 # aviation gasoline, 91 # aviation gasoline and 100 # aviation gasoline, and all components are derived from petroleum. The 75 # aviation gasoline is produced by Beijing Yanshan division of petrochemical industry in China, has annual output of about 8000 tons and is used for a small piston type aeroengine without a supercharger. Along with the continuous high consumption demand in the aviation gasoline field, along with the adjustment of the energy structure in China and the new requirements for guaranteeing the energy safety, the preparation of aviation gasoline by taking coal as a raw material provides a corresponding solution. Patent CN 109679692a proposes an aviation blend oil and a preparation method thereof, namely, the aviation blend oil is prepared by taking mixed carbon five, methyl tertiary butyl ether, isooctane and coal-based mixed aromatic hydrocarbon as blend components, the motor octane number, sulfur content, distillation range, saturated vapor pressure and aromatic hydrocarbon content of the blend product are examined, but other important indexes such as freezing point, acidity and the like are not examined, and the heat value of the blend oil cannot meet the index requirements because the blend oil contains more methyl tertiary butyl ether, and the blend oil cannot be directly used as aviation gasoline.
The coal-based aviation gasoline blending component can be prepared by taking coal as a raw material through a coal liquefaction technology including a direct coal liquefaction technology and an indirect coal liquefaction technology and further secondary processing processes including distillation cutting, catalytic reforming and the like. However, how to use these blending components to blend out products meeting the various index requirements of 75 # aviation gasoline in GB 1787-2018 aviation piston engine fuel is difficult because the fuel component hydrocarbon prepared by the coal-to-liquid pipeline is more single in composition, for example, the main components of the fuel component hydrocarbon are aromatic hydrocarbon and naphthenic hydrocarbon obtained by the direct coal liquefaction route; while the indirect coal liquefaction route is mainly based on alkane, the fuel is a mixture of different hydrocarbon components, and a plurality of performance indexes are required to be simultaneously considered. Therefore, how to select proper blending components and determine the respective content, and utilize coal-based blending components as much as possible to blend various indexes meeting national standard requirements is a new subject in the field.
Disclosure of Invention
Aiming at the current situation that the source of the raw material of the existing 75 # aviation gasoline is only petroleum and the structure of the raw material is single, the invention provides the 75 # coal-based aviation gasoline and the preparation method thereof, wherein the proportion of the coal-based blending component can be higher than 65%.
No. 75 coal-based aviation gasoline comprises the following components in terms of total mass of the composition: 6-25%, preferably 10-20% of coal-based reformate; 10 to 30 percent, preferably 15 to 25 percent of coal-based reforming topped oil; 25-45% of coal-based naphtha, preferably 30-40%; petroleum-based alkylated gasoline 20-40%, preferably 25-30%
The composition of the invention may contain an appropriate amount of antioxidant, and the amount of antioxidant added may be 20 to 50mg/L, preferably 20 to 30mg/L.
Wherein the carbon number of the coal-based naphtha is distributed between C4 and C11, and the proportion of C6 to C9 components is more than 75 percent; the hydrocarbon composition comprises normal paraffins, isoparaffins, naphthenes and aromatic hydrocarbons, wherein the main components are naphthenes, the ratio is 65-75%, the ratio of the normal paraffins and isoparaffins is 8-15%, and the content of the aromatic hydrocarbons is lower than 3%.
The coal-based naphtha production technology comprises, but is not limited to, a direct coal liquefaction technology and a hydro-upgrading technology, and can be specifically obtained by the following method: the coal is directly liquefied to obtain liquefied oil, and is further subjected to hydro-upgrading and then fractionation to obtain coal-based naphtha.
Wherein the carbon number of the coal-based reformate is distributed between C5 and C11, and the C7 to C9 components account for more than 85 percent; the hydrocarbon composition comprises normal paraffins, isoparaffins, naphthenes and aromatic hydrocarbons, wherein the main components are aromatic hydrocarbons with the proportion of 70-80%, the secondary components are isoparaffins with the proportion of 10-15%, and the normal paraffins and naphthenes with the lowest proportion are 2-10%.
The coal-based reformate production technology comprises, but is not limited to, a direct coal liquefaction technology, a hydro-upgrading technology and a reforming technology, and can be specifically obtained by the following method: the coal is directly liquefied to obtain liquefied oil, the liquefied oil is further subjected to hydro-upgrading, then coal-based naphtha is obtained through fractionation, and the heavy components of the distilled coal-based naphtha are further sent to a catalytic reforming unit to obtain coal-based reformate.
Wherein the carbon number of the coal-based reforming topped oil is distributed between C4 and C7, and the proportion of C5 to C6 components is more than 85 percent; the hydrocarbon composition comprises n-alkane, isoparaffin, naphthene and arene, wherein the main hydrocarbon composition is naphthene, the ratio of which is 55-65%, and the second hydrocarbon composition is n-alkane and isoparaffin, the ratio of which is 18-25%, and the content of arene is lower than 3%.
The coal-based reforming topped oil production technology comprises, but is not limited to, a direct coal liquefaction technology and a hydro-upgrading technology, and can be specifically obtained by the following method: the liquefied oil is obtained after the direct liquefaction of the coal, the coal-based naphtha is obtained through hydro-upgrading and fractionation, and the overhead light component obtained after the distillation before the coal-based naphtha is sent to the reforming reactor is the coal-based reforming topped oil.
Wherein, the carbon number of the petroleum-based alkylated gasoline is distributed in C4-C12, wherein the petroleum-based alkylated gasoline is mainly C8 isoparaffin, the ratio is 78-88%, the rest is mainly other carbon number isoparaffin, and the ratio is 12-18%. The petroleum-based alkylated gasoline is derived from alkylation technology in petroleum refining.
The antioxidant may be selected from any antioxidant conventional in the art, preferably one or more of 2, 6-di-tert-butyl-p-cresol, tert-butylhydroquinone, 2, 6-di-tert-butylphenol.
A preparation method of 75 # coal-based aviation gasoline comprises the following specific preparation method:
(1) Adding coal-based reformate, coal-based reformed topped oil, coal-based naphtha and petroleum-based alkylated gasoline respectively according to the proportion, and mixing and stirring uniformly to obtain compound gasoline;
(2) And (3) selectively adding an antioxidant into the compound gasoline obtained in the step (1), and then uniformly mixing to obtain the finished 75 # coal-based aviation gasoline.
The application does not contain tetraethyl lead.
The invention has the following advantages:
The application creatively provides a method for blending the coal-based gasoline blending component and the petroleum-based alkylated gasoline component to obtain a product which completely meets the requirements of various indexes of 75 # aviation gasoline in GB 1787-2018 aviation piston engine fuel, wherein the ratio of the coal-based blending component is higher than 65%. The application widens the raw material sources of No. 75 aviation gasoline, is beneficial to enriching the energy structure of aviation gasoline, ensures the energy safety of China, has lower cost and simple preparation method, and has industrial application prospect and remarkable social benefit.
Detailed Description
Specific embodiments of the present invention are further described below with reference to examples.
Among the following blended products, coal-based reformate topped oil and coal-based naphtha are coal-based oil products of China petrochemical institute of petrochemicals; petroleum-based alkylated gasolines are products of the yankee refinery.
Microscopic hydrocarbon compositions and carbon number distributions of coal-based reformate, coal-based naphtha, petroleum-based alkylate are listed in tables 1,2, 3, and 4.
TABLE 1 coal-based reformate molecular composition
| Carbon number | N-alkanes | Isoparaffin(s) | Olefins | Cycloalkane (CNS) | Aromatic hydrocarbons | Totals to |
| 5 | 0.40 | 0.65 | 0.00 | 0.05 | 0.00 | 1.10 |
| 6 | 0.19 | 0.41 | 0.00 | 0.40 | 0.39 | 1.39 |
| 7 | 2.64 | 3.99 | 0.04 | 4.13 | 26.72 | 37.52 |
| 8 | 1.54 | 5.22 | 0.00 | 1.77 | 26.55 | 35.08 |
| 9 | 0.70 | 2.25 | 0.00 | 0.48 | 16.30 | 19.73 |
| 10 | 0.16 | 0.63 | 0.00 | 0.10 | 4.07 | 4.96 |
| 11 | 0.00 | 0.01 | 0.00 | 0.01 | 0.05 | 0.07 |
| Totals to | 5.99 | 13.36 | 0.04 | 6.93 | 74.08 | 99.91 |
Table 2 molecular composition of coal-based reformed topped oil
| Carbon number | N-alkanes | Isoparaffin(s) | Olefins | Cycloalkane (CNS) | Aromatic hydrocarbons | Totals to |
| 4 | 1.26 | 0.75 | 0.00 | 0.00 | 0.00 | 2.01 |
| 5 | 8.83 | 7.56 | 0.00 | 3.70 | 0.00 | 20.09 |
| 6 | 8.79 | 8.98 | 0.00 | 54.48 | 1.14 | 73.39 |
| 7 | 0.01 | 2.30 | 0.00 | 2.21 | 0.00 | 4.52 |
| Totals to | 18.89 | 19.59 | 0.00 | 60.39 | 01.14 | 100.01 |
TABLE 3 coal-based naphtha molecular composition
| Carbon number | N-alkanes | Isoparaffin(s) | Olefins | Cycloalkane (CNS) | Aromatic hydrocarbons | Totals to |
| 4 | 0.62 | 0.23 | 0.00 | 0.00 | 0.00 | 0.85 |
| 5 | 3.06 | 1.83 | 0.00 | 1.27 | 0.00 | 6.16 |
| 6 | 3.09 | 2.38 | 0.00 | 17.04 | 0.09 | 22.60 |
| 7 | 2.39 | 1.89 | 0.00 | 22.89 | 0.15 | 27.32 |
| 8 | 1.87 | 3.55 | 0.00 | 19.84 | 0.57 | 25.83 |
| 9 | 1.21 | 1.10 | 0.00 | 9.18 | 0.34 | 11.83 |
| 10 | 0.32 | 2.11 | 0.00 | 2.14 | 0.09 | 4.66 |
| 11 | 0.00 | 0.64 | 0.00 | 0.00 | 0.00 | 0.64 |
| Totals to | 12.56 | 13.74 | 0.00 | 72.37 | 1.24 | 99.9 |
TABLE 4 Petroleum-based alkylated gasoline molecular composition
Examples 1 to 10
The four components, coal-based reformate, coal-based naphtha, petroleum-based alkylate were blended in the blending ratios listed in table 5.
Table 5 No. 75 coal-based aviation gasoline blending formula
For a new aviation gasoline, the physicochemical properties that are preferentially investigated can be octane number, distillation range and vapor pressure, so that the products after blending the formulas 1-10 are firstly tested for octane number, distillation range and vapor pressure, and the results are shown in Table 6 and compared with the corresponding quality indexes in GB 1787-2018.
As can be seen from Table 6, for formulation 1, when no petroleum-based alkylated gasoline blending component was added, the octane number of the blended product was 68, the distance no less than 75 was significantly different, and the 90% vaporization temperature was greater than 145 ℃.
For formula 2, when 20% coal-based naphtha is reduced and 20% alkylate gasoline is added, the octane number of the product is obviously improved to 76, but the problem of octane number clamping exists, meanwhile, the 10% evaporation temperature cannot meet the requirement of no more than 80 ℃, and mainly because the reduction of the coal-based naphtha leads to the reduction of lighter components in the whole blended product, the readjustment and component content can be reduced, and the blending component content of the petroleum-based alkylate gasoline is increased, so that formula 3 is formed.
As can be seen from formulation 3, when the level of coal-based reformate is reduced to 15% and the level of alkylate gasoline is increased to 30%, the octane number, distillation range and vapor pressure of the blended product all meet the specification requirements.
In formula 4, when the content of the alkylated gasoline is further increased to 40%, the octane number is increased to 82, the distillation range and the vapor pressure are still in the index range, but when the content of the petroleum-based alkylated gasoline is excessively increased, the octane number is wasted due to the fact that the octane number is excessively increased to be higher than 75, the cost is increased, and the coal-based component of the alternative petroleum base is relatively low, so that the petroleum-based alkylated gasoline is not excessively increased, and the range is 25-30%.
For formula 5, compared with formula 3, the content of the coal-based reformate is further reduced to 10 percent, the content of the coal-based reformate is increased to 30 percent, the initial boiling point of the product is 39.0 ℃, the initial boiling point is mainly caused by the fact that the carbon number of the coal-based reformate is concentrated in C5-C6 and is lower than that of C7-C9 of the coal-based reformate, the initial boiling point is reduced due to excessive light components, the content of the coal-based reformate is not more than 25 percent, but is not too low, when the content of the coal-based reformate is reduced to 10 percent, the product is formed into formula 10, the 10 percent evaporation temperature clamping edge is 79.7 ℃, the 50 percent evaporation temperature is 107.4 ℃, the failure is mainly caused by the fact that the content of the light components is too low, and therefore, the proper range of the content of the reformate is 15-25 percent.
Compared with formula 5, the method can reduce the content of reforming topped oil and increase the content of coal-based naphtha to form formula 6, or reduce the content of reforming topped oil and increase the content of coal-based reformate to form formula 7, and the octane number, the distillation range and the vapor pressure of formula 6 and formula 7 are found to meet the index requirements.
In the formula 8, the content of the coal-based reformate is further increased to 30%, and the fact that the vapor pressure of the product cannot meet the index requirement due to excessive aromatic hydrocarbon content, and meanwhile, the evaporation temperatures of 10%,50% and 90% deviate from the index farther, so that the content of the coal-based reformate is not suitable to exceed 25%.
In the formula 9, when the content of the coal-based reformate is 5%, the octane number has a clamping phenomenon, and meanwhile, due to the fact that the heavy components are reduced and the light components are increased, the initial boiling point is lower than 40 ℃ and is unqualified, so that the proper proportion of the coal-based reformate is 10-20%.
From the standpoint of the combination examples 1 to 10, the coal-based naphtha is suitably contained in an amount of 30 to 40%.
Table 6 observed octane number, vapor pressure, and distillation range of No. 75 coal-based aviation gasoline blending product
For the formulas 3, 6 and 7 meeting the requirements, an antioxidant 2, 6-di-tert-butyl-p-cresol is further added and uniformly mixed, the addition amount is 20mg/L, so that the oxidation stability of aviation gasoline is improved, the generation of colloid is inhibited, and other physicochemical properties are inspected according to GB 1787-2018, and the results are shown in Table 7.
Table 7 basic physicochemical Properties of No. 75 coal-based aviation gasoline blended in formulation 3, formulation 6 and formulation 7
From table 7, each physicochemical property of 75 # coal-based aviation gasoline obtained by blending formula 3, formula 6 and formula 7 can meet the index requirements of GB 1787-2018, and the application belongs to a preferred embodiment.
Claims (9)
1. A No. 75 coal-based aviation gasoline composition comprises the following components in terms of total mass: 10-20% of coal-based reformate, 15-25% of coal-based reformate, 30-40% of coal-based naphtha and 25-30% of petroleum-based alkylated gasoline, wherein the carbon number of the coal-based naphtha is distributed in C4-C11, the proportion of C6-C9 components is more than 75%, the hydrocarbon composition of the coal-based naphtha comprises normal paraffins, isoparaffins, naphthenes and aromatics, the proportion of naphthenes is 65-75%, the proportion of normal paraffins and isoparaffins is 8-15%, the content of aromatics is less than 3%, and the sum of the hydrocarbon proportions is 100%; the carbon number of the coal-based reformate is distributed at C5-C11, wherein the C7-C9 components account for more than 85%, the hydrocarbon components of the coal-based reformate comprise n-alkane, isoparaffin, naphthene and aromatic hydrocarbon, wherein the aromatic hydrocarbon accounts for 70-80%, the isoparaffin accounts for 10-15%, the n-alkane and naphthene respectively account for 2-10%, and the sum of the hydrocarbon accounts for 100%; the carbon number of the coal-based reforming topped oil is distributed in C4-C7, wherein the proportion of C5-C6 components is more than 85%, the hydrocarbon composition of the coal-based reforming topped oil comprises n-alkane, isoparaffin, naphthene and arene, wherein the proportion of naphthene is 55-65%, the proportion of n-alkane and isoparaffin is 18-25%, the proportion of arene is less than 3%, and the sum of the hydrocarbon proportions is 100%; the carbon number of the petroleum-based alkylated gasoline is distributed in C4-C12, wherein the C8 isoparaffin accounts for 78-88%, the rest is mainly other carbon number isoparaffin, the carbon number accounts for 12-18%, and the coal-based aviation gasoline composition does not contain tetraethyl lead.
2. The composition according to claim 1, wherein an antioxidant is further added in an amount of 20 to 50mg/L.
3. The composition according to claim 1, wherein an antioxidant is further added in an amount of 20 to 30mg/L.
4. The composition of claim 1 wherein said coal-based naphtha production technique comprises: the coal is directly liquefied to obtain liquefied oil, and is further subjected to hydro-upgrading and fractionation to obtain coal-based naphtha.
5. The composition of claim 1, wherein the coal-based reformate production technique comprises: the coal is directly liquefied to obtain liquefied oil, then is further subjected to hydro-upgrading and fractionation to obtain coal-based naphtha, and the heavy component of the distilled coal-based naphtha is further sent to a catalytic reforming unit to obtain coal-based reformate.
6. The composition of claim 1, wherein the coal-based reforming topper oil production technique comprises: the liquefied oil is obtained after the direct liquefaction of the coal, the coal-based naphtha is obtained through hydro-upgrading and fractionation, and the overhead light component obtained after the distillation before the coal-based naphtha is sent to the reforming reactor is the coal-based reforming topped oil.
7. The composition of claim 1 wherein said petroleum-based alkylate gasoline is derived from alkylation technology in a petroleum refining process.
8. The composition of claim 2 wherein the antioxidant is selected from one or more of 2, 6-di-t-butyl-p-cresol, t-butylhydroquinone, 2, 6-di-t-butylphenol.
9. The method for preparing the No. 75 coal-based aviation gasoline in claim 1, which comprises the following steps:
(1) According to the proportion, respectively adding coal-based reformate, coal-based reformate topped oil, coal-based naphtha and petroleum-based alkylated gasoline for compounding, and uniformly mixing and stirring to obtain compound gasoline;
(2) And (3) optionally adding an antioxidant into the compound gasoline obtained in the step (1), and uniformly mixing to obtain the finished 75 # coal-based aviation gasoline.
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