CN101892093A - 基于乙醇的柴油燃料 - Google Patents
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Abstract
描述了一种基于乙醇的柴油燃料,其包含约60-约90%(v/v)的乙醇,至多约20%(v/v)的链长度为约10-约40的线性二烷基醚以及它们的混合物,和0-约30%(v/v)的燃烧加速剂。
Description
本申请涉及一种基于乙醇的柴油燃料。
乙醇越来越多地作为火花点火发动机的燃料。目前在巴西使用的火花点火发动机燃料是不同比例的乙醇和汽油的混合物。E85,其由85%的无水乙醇和15%的汽油组成,已经在瑞典使用了多年。
然而,迄今为止基于乙醇的燃料并不适合柴油发动机,主要是因为两个原因。首先,自动点火会有相当的点火延迟,这是由于乙醇的十六烷值只有约8造成的,而适宜的柴油燃料要求大于30的十六烷值。另外,点火后的燃烧速度要大大低于常规柴油燃料的燃烧速度,这会造成效率的损失。
众所周知,将柴油发动机的压缩比从约17-约18增加到约28是为了改善自动点火。瑞典的Scania公司选择了其中提高了终点温度的该发动机方案。然而,这会导致发动机的机械应变提高,这最终只能通过减少功率来避免。此外,还不得不向E85中添加其量为约3-约7%(v/v)的基于高分子量、没有挥发性的聚乙二醇衍生物的点火加速剂。这种柴油燃料还有一个商品名称Etamax D。然而,由于加入了聚乙二醇衍生物,Etamax D的使用会造成不希望的颗粒物排放(SAE2004-01-1987)。
使用根据US 5,628,805的甘油乙氧基化物作为点火加速剂已经证明会有颗粒物排放等缺点。
EP 0403516中记载了一种基于乙醇的柴油燃料,其包含作为点火改进剂的聚亚烷基二醇化合物。然而,这种燃料不是特别有效率,且会导致不希望的颗粒物排放。
本发明的目的就是基于避免以上的缺点,尤其是颗粒物排放,并提供一种基于乙醇的柴油燃料,该燃料可用于常规的柴油发动机。
该目的可以通过一种基于乙醇的柴油燃料来实现,该基于乙醇的柴油燃料包含约60-约90%(v/v)的乙醇,至多约20%(v/v)的链长度约为10-约40的线性二烷基醚以及它们的混合物,和0-约30重量%的燃烧加速剂。
因此,将一种或多种线性二烷基醚,其燃烧过程中基本上没有颗粒物排放, 加入到乙醇中。只产生了不可燃有机化合物的颗粒,而这些不可燃的有机化合物的颗粒可以在氧化催化剂处被除去。本发明的柴油燃料在测试循环中的颗粒物排放低于约5mg/kWh,优选在测试循环(ESC,ETC,WHDC(dieselnet.com))中低于约2mg/kWh。本发明的柴油燃料即使在低于21的压缩比下也可自动点火。本发明的柴油燃料可被用于常规的柴油发动机中,并且特征在于低点火延迟、高燃烧速度和高热值。点火延迟优选不大于9ms,特别优选不大于8.5ms,非常特别优选不大于8.0ms。另外,一种或多种二烷基醚的使用导致有可能无需变性剂。本发明的柴油燃料是一种基于生物基础的高价值的柴油燃料。
所述线性二烷基醚优选的存在量为至多约10%(v/v),特别优选至多约5%(v/v)。由于二烷基醚是本发明的柴油燃料含有的组分中最贵的一种,其用量越低越好。
本发明的柴油燃料中使用的线性二烷基醚的链长度是约10-约40。计算链的长度时,氧原子也包括在内。链长度优选约10-约30,特别优选约17-约25。己醚、庚醚、辛醚、壬醚、癸醚、十一烷基醚、十二烷基醚和十四烷基醚是特别合适的。辛醚,癸醚和十二烷基醚是特别合适的,因为它们的生产最经济。
线性二烷基醚优选只有一个醚键。
进一步优选线性二烷基醚没有醇基。
线性二烷基醚优选主要是直链的,也就是说至多有少量的支链,即仅包含至多三个、有利地是至多两个的C1-C4烷基。
如果使用了燃烧加速剂,二烷基醚优选用作乙醇和燃烧加速剂之间的增溶剂。优选在-20℃下仍旧有可能进行混合。
乙醇(无水)的用量为约60-约95%(v/v),特别是约65-约85%(v/v),特别优选约70-约80%(v/v)。
燃烧加速剂的存在量为约0-约30%(v/v),优选约2-约25%(v/v)。特别地,燃烧促进剂的存在量为约5-约20%(v/v),非常特别优选的存在量为约5-约50%(v/v)。这具有以下优点:能减少昂贵的二烷基醚的含量,同时保持了所需性能。
燃烧加速剂的目标是提高点火后的燃烧速度。此外,燃烧加速剂还提高了燃料的热值。
燃烧加速剂优选选自柴油燃料或火花点火发动机燃料组分。
柴油燃料特别优选加氢植物油、FAME、FAEE和它们的混合物,因为这些燃料可以与乙醇并且也能和线性二烷基醚混合得特别良好。使用符合DINEN14214(2004)的FAME,尤其是菜籽油甲酯(RME),棕榈油甲酯(PME)和大豆油甲酯(SME),是非常特别优选的,因为这些能与乙醇及线性二烷基醚混合得特别良好,并仍进一步增加本发明的柴油燃料的热值。
火花点燃发动机燃料组分,尤其是己烷和石油醚也是适宜的,尤其是,作为燃烧加速剂。
在一个优选的实施方案中,本发明的基于乙醇的柴油燃料包含约60-约80%(v/v)的乙醇,约2.5-约15%(v/v)的线性二烷基醚以及它们的混合物,和约15-约25%(v/v)的燃烧加速剂。
尤其是,本发明的基于乙醇的柴油燃料包含约65-约75%(v/v)的乙醇,约2.5-约12.5%(v/v)的线性二烷基醚,和约17.5-约22.5%(v/v)的燃烧加速剂。
在一个非常特别优选的实施方案中,本发明的基于乙醇的柴油燃料含有约75%(v/v)的乙醇,约5%(v/v)的线性二烷基醚和约20%(v/v)的燃烧加速剂。
如果不使用燃烧加速剂,本发明的基于乙醇的柴油燃料优选包含约70%(v/v)的乙醇和约30%(v/v)的线性二烷基醚。
附图说明
图1是采用先进燃料点火延迟分析仪(AFIDA)对常规商业燃料Etamax D进行分析所得到的结果图。
图2是采用先进燃料点火延迟分析仪(AFIDA)对以下实施例2中所得到的三种基于乙醇的柴油燃料进行分析所得到的结果图。
图3是采用先进燃料点火延迟分析仪(AFIDA)对以下实施例3中所得到的三种基于乙醇的柴油燃料进行分析所得到的结果图。
实施例1(对比例)
常规商业燃料Etamax D的点火延迟和燃烧速度采用来自 β的ASG公司(US2007/0083319)的先进燃料点火延迟分析仪(AFIDA)进行分析(见图1)。注入压力为800巴,腔室温度为600℃,腔室压力为50巴,注入时间600ms,注入量22mg。
点火延迟大于25ms,换句话说,没有点火发生。
实施例2
对以下给出的本发明的基于乙醇的柴油燃料进行同实施例1类似的试验(图2)。
表1
编号 | 乙醇(无水) [%(v/v)] | 二烷基醚 [%(v/v)] | 燃烧加速剂 [%(v/v)] | 点火延迟 [ms] |
1 | 70 | 辛醚 10 | 棕榈油甲酯 20 | 7.5 |
2 | 70 | 癸醚 10 | 大豆油甲酯 20 | 7.8 |
3 | 75 | 十二烷基醚 5 | 大豆油甲酯 20 | 7.8 |
相比现有技术(Etamax D)(Etamax D>25ms),点火延迟减少了。除此之外,燃烧速度明显加快。
实施例3
对以下给出的本发明的基于乙醇的柴油燃料进行同实施例1类似的试验(图3)。
表2
编号 | 乙醇(无水) [%(v/v)] | 二烷基醚 [%(v/v)] | 燃烧加速剂 [%(v/v)] | 点火延迟 [ms] |
1 | 70 | 辛醚 10 | 菜籽油甲酯 20 | 7.5 |
2 | 70 | 癸醚 10 | 菜籽油甲酯 20 | 7.8 |
3 | 70 | 十二烷基醚 10 | 菜籽油甲酯 20 | 7.8 |
相比现有技术(Etamax D)(Etamax D>25ms),点火延迟减少。除此之外,燃烧速度明显加快。当使用癸醚(2)和十二烷基醚(3)时,与辛醚(1)相比,压力增加,并由此燃烧速度更高。
实施例4
和实施例1类似,对含有70%(v/v)乙醇和30%(v/v)醚的乙醇添加剂混合物进行测试。测定了下列点火延迟:
丁醚 >15ms
己醚 8.5ms
辛醚 7.9ms
乙二醇二乙醚 >15ms
甲醛缩二乙醇,99.7% >15ms
无水四氢吡喃,99% >15ms
二甲氧基甲烷,98% >15ms
正丁基乙基醚,99% >15ms
丁基乙基醚,99% >15ms
二叔丁基过氧化物[2%] >15ms
癸醇 12.5ms
THF >15ms
该实施例表明燃烧加速剂可任选地被完全省却。
Claims (9)
1.基于乙醇的柴油燃料,包括约60-约95%(v/v)的乙醇,至多约20%(v/v)的链长度为约10-约40的线性二烷基醚以及它们的混合物,和0-约30%(v/v)的燃烧加速剂。
2.根据权利要求1的柴油燃料,其特征在于线性二烷基醚的存在量至多约为10%(v/v),优选至多约为5%(v/v)。
3.根据前述权利要求任一项的柴油燃料,其特征在于燃烧加速剂的存在量为约2-约25%(v/v),优选约5-约20%(v/v)。
4.根据前述权利要求任一项的柴油燃料,其特征在于燃烧加速剂选自柴油燃料或火花点火发动机燃料组分。
5.根据权利要求4的柴油燃料,其特征在于所述柴油燃料选自由加氢植物油、FAME、FAEE和它们的混合物组成的组。
6.根据权利要求5的柴油燃料,其特征在于所述FAME是满足DIN EN14214(2004)的FAME。
7.根据权利要求6的柴油燃料,其特征在于所述满足DIN EN 14212(2004)的FAME是菜籽油甲酯、大豆油甲酯或棕榈油甲酯。
8.根据权利要求4的柴油燃料,其特征在于火花点火发动机燃料组分是己烷或石油醚。
9.根据前述权利要求任一项的柴油燃料,其特征在于乙醇的存在量为约65-约85%(v/v),优选约70-约80%(v/v)。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009015347.0 | 2009-03-27 | ||
DE102009015347A DE102009015347A1 (de) | 2009-03-27 | 2009-03-27 | Dieselkraftstoff auf Ethanol-Basis |
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CN101892093B CN101892093B (zh) | 2014-03-12 |
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EP (1) | EP2233552B1 (zh) |
CN (1) | CN101892093B (zh) |
AT (1) | ATE540098T1 (zh) |
BR (1) | BRPI1000817B1 (zh) |
DE (1) | DE102009015347A1 (zh) |
RU (1) | RU2451716C2 (zh) |
Cited By (1)
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CN104533577A (zh) * | 2015-01-13 | 2015-04-22 | 四川美丰化工股份有限公司 | 一种超低冰点氮氧化物还原剂及其制备方法 |
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SE535227C2 (sv) * | 2010-10-06 | 2012-05-29 | Scania Cv Ab | Användning av rapsmetylester som utfällningshämmande bränsletillsats i etanolbaserade bränslen |
CZ306196B6 (cs) * | 2011-10-13 | 2016-09-21 | Česká zemědělská univerzita v Praze | Palivo na bázi bionafty |
US8974553B2 (en) | 2012-03-29 | 2015-03-10 | Joseph Ried | Miscible diesel fuel ethanol composition |
US9174903B2 (en) | 2013-03-15 | 2015-11-03 | Gas Technologies Llc | Reactive scrubbing for upgrading product value, simplifying process operation and product handling |
US9255051B2 (en) | 2013-03-15 | 2016-02-09 | Gas Technologies Llc | Efficiency, flexibility, and product value of a direct alkanes to oxygenates process |
US20140275634A1 (en) | 2013-03-15 | 2014-09-18 | Gas Technologies Llc | Ether Blends Via Reactive Distillation |
WO2015050991A1 (en) | 2013-10-01 | 2015-04-09 | Gas Technologies L.L.C. | Diesel fuel composition |
FI127887B (en) * | 2016-12-19 | 2019-04-30 | Neste Oyj | Multi-component diesel composition |
FI127886B (en) | 2016-12-19 | 2019-04-30 | Neste Oyj | More Diesel Component Composition |
CN106947549A (zh) * | 2017-04-06 | 2017-07-14 | 太原师范学院 | 一种高清洁液体锅炉燃料 |
RU2730833C1 (ru) * | 2019-05-29 | 2020-08-26 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Вятский государственный университет" (ВятГУ) | Низкотемпературная топливная композиция |
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Also Published As
Publication number | Publication date |
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BRPI1000817B1 (pt) | 2018-01-02 |
BRPI1000817A2 (pt) | 2011-03-22 |
DE102009015347A1 (de) | 2010-09-30 |
CN101892093B (zh) | 2014-03-12 |
EP2233552A1 (de) | 2010-09-29 |
ATE540098T1 (de) | 2012-01-15 |
RU2451716C2 (ru) | 2012-05-27 |
EP2233552B1 (de) | 2012-01-04 |
US9982207B2 (en) | 2018-05-29 |
US20100242347A1 (en) | 2010-09-30 |
RU2010111705A (ru) | 2011-10-10 |
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