CN104611073B - A kind of hydrous ethanol gasoline and preparation method thereof - Google Patents
A kind of hydrous ethanol gasoline and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a kind of hydrous ethanol gasoline, this hydrous ethanol gasoline comprises: gasoline, hydrous ethanol, hydrophilic emulsifier, lipophilic emulsifier and cosolvent, it is characterized in that: each component percentage by volume is: gasoline proportionality is 78～89.8%, hydrous ethanol ratio is 10～20%, composite emulsifier ratio 0.2～1.2%, cosolvent ratio 0～0.5%, combustion adjuvant ratio 0～0.3%, wherein the ethanol degree of hydrous ethanol is 90～97%. The present invention is by preferred moisture gasoline blending component and emulsifying agent cosolvent kind ratio etc., improve the saturation of ethanol petrol to water, reduce the phase separation temperature containing tax ethanol petrol, technical recipe is simple, under airtight condition, deposit and be not also separated above half a year, accumulating is convenient, solved that ethanol petrol moisture content exceeds standard completely and the problem that causes phenomenon of phase separation.
Description
Technical field
The invention belongs to petrochemical technology field, relate to a kind of hydrous ethanol gasoline component and preparation method thereof.
Background technology
Ethanol is applied to vehicle fuel aspect as the reproducible biomass energy of one, and main and gasoline is mixed into automobile-used secondAlcohol gasoline. Ethanol petrol more has superiority in discharge performance with respect to gasoline. Ethanol has and methyl tertiary butyl ether(MTBE)(MTBE) the similar characteristic such as high-octane rating, octane number blending effect and rich oxygen content, MTBE more relativelyFor environmental protection, therefore all or part of alternative MTBE all technically and economically. Nearly 20 countries are promoting ethanol at presentGasoline, China has 10 provinces and cities promoting the use of ethanol petrol as the pilot of E10 vehicle-use alcohol gasoline at present. At vapourThe ethanol adding in oil is absolute ethyl alcohol. But absolute ethyl alcohol later stage dehydration cost is high, when ethanol matter in hydrous ethanolWhen amount mark is 95.57%, ethanol and water azeotropic, extremely difficult separation. For example work as moisture content below 5% dehydration to 0.8%,Except the extra expensive device of need, its energy consumption also accounts for 20%～50% of alcohol production total energy consumption. With containing certain moistureAbsolute ethyl alcohol in ethanol instead of ethanol gasoline, can save corresponding dehydration cost. A small amount of moisture meeting in combustion processThere is fine setting effect, be conducive to burning: 1. under hydrone HTHP, can be decomposed into active atom and free radical, promote combustionBurn the carrying out of reaction; 2. it is more even that steam makes aflame gaseous mixture, accelerates diffusion flame spread speed; 3. waterHigh specific heat value can be stabilized the each several part temperature difference in combustion chamber, prevents that local detonation from appearring in combustion phases, makes burning more mildFully. Ethanol itself is high containing oxygen, and ethanol also can be brought into play cosolvent effect. Exceed ethanol vapor but water content is too highAfter water saturation in oil, be prone to and be separated. After large for hydrous ethanol gasoline water content, unstable easy layering asksTopic, there is no good solution at present. Application publication number is CN102925227A, and denomination of invention is " a kind of micro-The preparation method of emulsion gasoline " in set forth with micro-emulsifier, help emulsion to make water and gasoline can form microemulsified gasoline,There is the problem that emulsifier is large in this scheme, and cannot solve the problem of dissolving each other of hydrous ethanol and gasoline; Shen Qing PublicationNumber be CN101203585A, denomination of invention in " based on the engine fuel of gasoline and ethanol ", set forth gasoline andThere is not the proportion of layering in hydrous ethanol mixing, but owing to not having doping, makes only dependence of ethanol petrol itselfSaturation to water is limited.
Summary of the invention
The present invention is intended to, by adding the additives such as proper amount of surfactant, provide a kind of component simple, with low cost,Allotment is easy to realize, and mixes stable homogeneous, the hydrous ethanol gasoline formula that phase separation temperature is low and prepare different ethanol ratiosThe optimization method of the stable aqueous ethanol petrol of example different water cut ratio.
Technical scheme of the present invention is to provide a kind of hydrous ethanol gasoline, and this hydrous ethanol gasoline comprises: gasoline, moistureEthanol, hydrophilic emulsifier, lipophilic emulsifier and cosolvent, is characterized in that: each component percentage by volume is:Gasoline proportionality is 78～89.8%, and hydrous ethanol ratio is 10～20%, composite emulsifier ratio 0.2～1.2%, helpsSolvent ratios 0～0.5%, combustion adjuvant ratio 0～0.3%, wherein the ethanol degree of hydrous ethanol is 90～97%.
The present invention also provides a kind of preparation method of hydrous ethanol gasoline, it is characterized in that: comprise the following steps:
(1) determine the when ethanol degree of hydrous ethanol of the shared volume of hydrous ethanol that is blended hydrous ethanol gasoline;
(2) selected composite emulsifier and cosolvent kind, determine composite emulsifier, cosolvent, HLB value, combustion-supportingAgent and mixing time, then based on the legal experimental design of carrying out of central. set;
(3) obtain after result of the test, match responding surface model, the equation between matching phase separation temperature and each factor,Solve phase separation temperature minimum based on equation and optimal conditions, analysis optimization draws the respective value of each factor, optimumPreparation parameter;
(4) the optimum preparation parameter obtaining by optimization measures respectively gasoline, hydrous ethanol, composite emulsifier, hydrotropyAgent and combustion adjuvant;
(5) first in hydrous ethanol, add hydrophilic emulsifier at normal temperatures, naturally miscible 5 minutes, make it to mixEvenly;
(6) in gasoline, add cosolvent and lipophilic emulsifier at normal temperatures, naturally miscible 5 minutes, make it mixedClose evenly;
(7) mixed liquor of making by step (5) and step (6) is respectively contained in same container, adds and helpCombustion agent, in atmospheric closed space, is uniformly mixed 20～300 seconds with mixer, forms fuel combination, finally will makeThe fuel storage of getting ready is in an airtight container.
The invention has the beneficial effects as follows:
By preferred moisture gasoline blending component and emulsifying agent cosolvent kind ratio etc., improve the appearance of ethanol petrol to waterThe amount of receiving, reduces the phase separation temperature containing tax ethanol petrol, and technical recipe is simple, deposits half a year above also under airtight conditionBe not separated, accumulating is convenient, has solved that ethanol petrol moisture content exceeds standard completely and the problem that causes phenomenon of phase separation.E10W (hydrous ethanol accounting 10%, V/V, ethanol degree 95%) after optimization of C/C composites, its phase separation temperature is by firstBe down to-4 DEG C for 15 DEG C. Hydrous ethanol gasoline is applied on GDI engine, under middle and slow speed of revolution full load mode, containsThe torque of water-ethanol gasoline and power are a little more than absolute ethyl alcohol gasoline and gasoline, in 3.4%; Equivalent fuel consumptionA little less than gasoline (0.2%～2%); CO, THC, NOx discharge are all better than E10 absolute ethyl alcohol gasoline, when low speed, omitBe inferior to gasoline, after improving with rotating speed, approach and be even better than gasoline.
Detailed description of the invention
Below with reference to specific embodiment, the present invention is described further, and described embodiment is just for helping thisThose skilled in the art understand the present invention, instead of limit range of application of the present invention.
In this embodiment, hydrous ethanol gasoline, comprising: gasoline, hydrous ethanol, hydrophilic emulsifier, lipophileEmulsifying agent and cosolvent, is characterized in that: each component percentage by volume is: gasoline proportionality is 78～89.8%, moistureProportion of ethanol is 10～20%, and the ethanol degree of hydrous ethanol is 90～97%, composite emulsifier ratio 0.2～1.2%,Cosolvent ratio 0～0.5%, combustion adjuvant ratio 0～0.3%. Wherein, the volume fraction of described hydrous ethanol moisture is3～10%; Described composite emulsifier is formulated by lipophilic emulsifier and hydrophilic emulsifier. Lipophilic emulsifierHard by sorbitan fatty ester, SPAN85, sorbitol anhydride monolaurate, sorbitol anhydride threeWherein one or more combination of resin acid fat; Hydrophilic emulsifier is by polyoxyethylene 20 sorbitan monooleate, polyoxy secondWherein one or more combination of alkene sorbitan fatty acid ester; HLB (the hydrophilicand of described composite emulsifierLipophilicbalance, hydrophile-lipophile balance value) inclined to one side hydrophily, HLB value is 3～9; Described combustion adjuvant is ferrocene;
In this invention, also can not need additionally to add cosolvent, hyperoxic ethanol can serve as cosolvent; Institute in the present inventionStating gasoline model is marketable gasolines, i.e. No. 90,93,97, state's four gasoline, state's five gasoline 89,92,95; The present inventionIn, cosolvent kind used can be amylalcohol, octanol, ethyl acetate, oleic acid, castor-oil plant wet goods;
Case study on implementation 1
For obtaining the optimal stability of ethanol petrol of hydrous ethanol ratio 10% (ethanol degree 95%), seek in certain limitAsk optimum preparation parameter. The wherein scope of component kind optimizing: HLB value 4.3～8, mixing time 0.5～6.5, helpsSolvent ratios 0～0.4, emulsifier proportion 0.2～1, the index of weighing stability is phase separation temperature (Y); CompositeEmulsifier is elected the 80+ of class of department Tween 80 as, and cosolvent kind is elected n-octyl alcohol as.
(II) experimental design:
Adopt mathematical statistics software as SPSS or Design-Expert software or Isight software, legal based on central. setTesting program and the result of design are as shown in table 1.
Table 1E10W stability test matrix and result
Note: in table response be phase separation temperature/DEG C, A is HLB value, B is mixing time/min, C is cosolvent/%, D is emulsifying agent/%.
(III) Matching Model, optimize preparation parameter:
In software, bring data into, match quadratic power (Quadratic) response surface model optimum. The matching temperature that is separatedEquation between degree and each factor, carries out multinomial matching recurrence to the coding of experimental data, sets up regression model equation (1):
Y＝-2.63+1.44A-0.36B-1.19C-3.64D-1.12AB-7.75AC+3.56AD-0.12BC+0.47BD+2.81CD+14.54A2+0.14B2+5.54C2+3.12D2(1)
In formula: Y-phase separation temperature; A-HLB value; B-mixing time; C-cosolvent ratio; D-emulsificationAgent ratio.
Solve phase separation temperature minimum and corresponding each factor values based on equation and definite factor range.
Optimize to obtain optimum preparation parameter: gasoline 89.05%, hydrous ethanol (ethanol degree 95%) 10%, HLB value 5.97,Composite emulsifier 0.72% (wherein class of department 80 ratios 0.61%, Tween 80 ratio 0.11%), cosolvent (n-octyl alcohol)0.23％。
(IV) preparation method
Need configuration 50L hydrous ethanol gasoline to test on GDI engine, concrete preparation process is as follows: 1. measure and containWater-ethanol (ethanol degree 95%) 5L, adds polyoxyethylene 20 sorbitan monooleate (Tween 80) 55mL, fromSo miscible 5 minutes; 2. measure gasoline 44.525L, add sorbitan fatty ester (class of department 80) 305mL,Naturally miscible 5 minutes; 3. above-mentioned two systems are packed in same container, add n-octyl alcohol 115mL, keep airtightCondition, is uniformly mixed 1～6min with mixer.
(V) effect:
A) stability: take a morsel out and test its phase separation temperature-4 DEG C, place under normal temperature and do not occur above for three monthsLayering.
B) engine performance: be applied on GDI engine, under middle and slow speed of revolution full load mode, E10W turns roundSquare and power are a little more than E10 and gasoline, in 3.4%; Actual specific oil consumption and E10 are roughly the same, higher than gasoline2.5%～4.4%, equivalent specific fuel consumption is lower than gasoline 0.2%～2.1%; CO, THC, NOx discharge are all better than E10,When low speed, be slightly inferior to gasoline, after improving with rotating speed, approach and be even better than gasoline.
Case study on implementation 2
(I) Search Range:
For obtaining the optimal stability of ethanol petrol of hydrous ethanol ratio 20% (ethanol degree 95%), seek in certain limitAsk optimum preparation parameter. The wherein scope of component kind optimizing: HLB value (A) 4.3～8, mixing time (B) 0.5～6.5,Cosolvent volume ratio (C) 0.1～0.5%, emulsifying agent volume ratio (D) 0.2～1%, the index of weighing stability is phaseSeparation temperature (Y). Composite emulsifier kind is elected the 80+ of class of department polysorbate40 as, and cosolvent kind is elected castor oil as.
(II) experimental design:
Adopt mathematical statistics software as SPSS or Design-Expert software, based on the legal design experiment of central. set as tableShown in 2. Response is phase separation temperature, and result is as shown in table 2.
Table 2E20W stability test matrix and result
Note: in table Y be response be phase separation temperature/DEG C, A is HLB value, B is mixing time/min, C is cosolvent/%, D is emulsifying agent/%.
(III) Matching Model, optimization of C/C composites:
In software, bring data into, match cube (Cubic) response surface model optimum. Matching phase separation temperatureAnd the equation between each factor, carries out multinomial matching recurrence to the coding of experimental data, sets up regression model equation (2):
Y＝-2.00-0.25A-3.50B+0.50C-3.50D-0.62AB-0.25AC+0.87AD-0.13BC+0.25BD+0.88CD+1.10A2+0.98B2-0.52C2+0.73D2+0.88ABC+0.25ABD-0.12ACD-0.75*BCD+3.88A2B-0.75A2C+3.87A2D(2)
In formula: Y-phase separation temperature; A-mixing time; B-HLB value; C-cosolvent ratio; D-emulsificationAgent ratio. Solve phase separation temperature minimum and corresponding each factor values based on equation and definite factor range. OptimizeObtain optimum preparation parameter: gasoline 79.05%, hydrous ethanol (ethanol degree 95%) 20%, HLB value 5.89, compositeEmulsifying agent 0.74% (wherein class of department 80 ratios 0.636%, polysorbate40 ratio 0.104%), cosolvent (castor oil)0.21％。
(IV) preparation method
Need the ethanol petrol of configuration 1000mL hydrous ethanol ratio 20% (ethanol degree 95%), concrete preparation process is as follows:1. measure hydrous ethanol (ethanol degree 95%) 200mL, add polyoxyethylene 20 sorbitan monooleate (tween40) 1.04mL, naturally miscible 5 minutes; 2. measure gasoline 790.5mL, add sorbitan fatty ester (departmentClass 80) 6.36mL, naturally miscible 5 minutes; 3. above-mentioned two systems are packed in same container, add castor oil2.1mL, keeps airtight condition, is uniformly mixed 1～6min with mixer.
(V) effect:
Stability: take a morsel out and test its phase separation temperature-7 DEG C, place under normal temperature and do not occur above layering for three months.
Claims (1)
1. a preparation method for hydrous ethanol gasoline, this hydrous ethanol gasoline comprises: gasoline, hydrous ethanol, parentWater emulsifier, lipophilic emulsifier, cosolvent and combustion adjuvant, each component percentage by volume is: gasoline proportionality is78～89.8%, hydrous ethanol ratio is 10～20%, composite emulsifier ratio 0.2～1.2%, cosolvent ratio 0～0.5%, combustion adjuvant ratio 0～0.3%, wherein the ethanol degree of hydrous ethanol is 90～97%, it is characterized in that: compriseFollowing steps:
(1) determine the when ethanol degree of hydrous ethanol of the shared volume of hydrous ethanol that is blended hydrous ethanol gasoline;
(2) selected composite emulsifier and cosolvent kind, determine composite emulsifier, cosolvent, HLB value, combustion-supportingThe scope of agent and mixing time, then or optimization Law Latin legal based on central. set carried out experimental design;
(3) obtain after result of the test, match responding surface model, the equation between matching phase separation temperature and each factor,Solve phase separation temperature minimum based on equation and optimal conditions, analysis optimization draws the respective value of each factor, optimumPreparation parameter;
(4) the optimum preparation parameter obtaining by optimization measures respectively gasoline, hydrous ethanol, composite emulsifier, hydrotropyAgent and combustion adjuvant;
(5) first in hydrous ethanol, add hydrophilic emulsifier at normal temperatures, naturally miscible 5 minutes, make it to mixEvenly;
(6) in gasoline, add cosolvent and lipophilic emulsifier at normal temperatures, naturally miscible 5 minutes, make it mixedClose evenly;
(7) mixed liquor of making by step (5) and step (6) is respectively contained in same container, adds and helpCombustion agent, in atmospheric closed space, is uniformly mixed 20～300 seconds with mixer, forms fuel combination, finally willThe fuel storage preparing is in an airtight container.
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| CN106433813B (en) * | 2016-09-26 | 2018-04-13 | 广西科技大学 | Microemulsified hydrous ethanol gasoline and its concocting method |
| CN106398785B (en) * | 2016-09-26 | 2019-02-15 | 广西科技大学 | Hydrous ethanol gasoline micro-emulsifier |
| CN108659899A (en) * | 2018-06-15 | 2018-10-16 | 王琳 | A kind of novel additive for gasoline of ethanol |
| CN109337724A (en) * | 2018-12-04 | 2019-02-15 | 苏州西姆提纳米科技有限公司 | A kind of gasoline additive and its application |
| CN111625960B (en) * | 2020-05-27 | 2023-09-01 | 海南热带汽车试验有限公司 | CFD-based E10 ethanol gasoline engine combustion three-dimensional simulation method |
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| US4384872A (en) * | 1979-03-05 | 1983-05-24 | Institute Of Gas Technology | Stabilized gasoline-alcohol fuel compositions |
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| CN101203585A (en) * | 2005-06-21 | 2008-06-18 | She联合控股有限公司 | Motor fuel based on gasoline and ethanol |
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