Oxymethylenether Als Dieselkraftstoffzusätze Der Zukunft

Lumpp, Björn; Rothe, Dieter; Pastötter, Christian; Lämmermann, Reinhard; Jacob, Eberhard

doi:10.1365/s35146-011-0049-8

Cited by 28 publications

(6 citation statements)

References 2 publications

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“…Other compounds have been discussed, such as ammonia [6,7], but while they are interesting for specific applications, these options are most probably not realistic on the scale of an energy system. In addition, there is a number of possible molecules discussed as additives for fuels for internal combustion engines, such as diemethylether (DME) [8], poly(oxomethylene) dimethylether (POM-DME, sometimes also called OME for oxymethyleneether) [9], furan derivatives [10] and others. While they are interesting fuel additives, it is presently unclear whether such molecules could be used as general purpose energy storage compounds.…”

Section: Possible Storage Moleculesmentioning

confidence: 99%

Chemical Compounds for Energy Storage

Schüth

2011

Chemie Ingenieur Technik

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Future energy systems, which will rely on substantially higher contributions from regenerative supply pathways and which will be increasingly less dependent on fossil energy resources, will require high energy density storage compounds as strategic reserves and for seasonal storage. Hydrocarbons, such as oil and natural gas, are currently serving this purpose.These will also be options in future systems, but in that case, these compounds would have to be synthesized using some other form of energy. Thus, with decreasing importance of fossil resources, other storage compounds also seem to be viable, the most prominent ones under discussion, in addition to the ones mentioned, being hydrogen, methanol, and ethanol. In this contribution, the different storage compounds will be discussed, and their merits and drawbacks for large scale implementation will be compared.

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Section: Possible Storage Moleculesmentioning

confidence: 99%

Chemical Compounds for Energy Storage

Schüth

2011

Chemie Ingenieur Technik

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“…DMM has been tested as a fuel itself [19,22]. Its production pathways have been studied in recent years [3] and it can be produced from renewable feedstocks [40,39], biomass [49], and CO 2 [30].…”

Section: Introductionmentioning

confidence: 99%

Detailed kinetic modeling of dimethoxymethane. Part I: Ab initio thermochemistry and kinetics predictions for key reactions

Kopp

Kröger

Döntgen

et al. 2018

Combustion and Flame

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Despite the great interest in oxygenated methyl ethers as diesel fuel additives and as fuels themselves, the influence of their methylenedioxy group(s) (O−CH 2 −O) has never been quantified using ab initio methods. In this study we elucidate the kinetics and thermochemistry of dimethoxymethane using high-level ab initio (CCSD(T)/aug-cc-pV(D+T)Z//B2PLYPD3BJ/6-311++g(d,p)) and statistical mechanics methods. We model torsional modes as hindered rotors which has a large influence on the description of the thermal behavior. Rate constants for hydrogen abstraction by. H and. CH 3 are computed and show that abstraction from the methylenedioxy group is favored over abstraction from the terminal methyl groups. β-Scission and isomerization of the radicals is computed using master equations. The effect of rovibrationally excited radicals from preceding hydrogen abstraction reactions on subsequent hot β-scission is computed and has large influence on the decomposition of the formed dimethylether radical. In the second part of this study, the computed kinetics and thermochemistry is used in a detailed model. The quantification of the effect of the dominant methylenedioxy group using ab initio methods can guide modeling of oxygenated methyl ethers that contain that group several times.

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“…The OMEs with the chemical structure H 3 C–O–(CH 2 O) n –CH 3 (OME n ) contain no C–C bonds, carbon atoms are connected via ether bridges. For application as an alternative fuel in the diesel/heating oil sector, a blend of the oligomers OME 3‐5 is used and an admixture of up to 15% v/v is targeted (https://www.ingenieur.de/technik/forschung/diesel-ersatzkraftstoff-ome-fuer-klimaneutralitaet-sorgen/, accessed 20 December 2021; https://www.ffe.de/veroeffentlichungen/welche-strombasierten-kraftstoffe-sind-im-zukuenftigen-energiesystem-relevant/, accessed 20 December 2021) [32–35]. Practical experience and scientific studies on biomass development, microbial diversity, and effects of contamination are not documented at present.…”

Section: Introductionmentioning

confidence: 99%

Evaluating microbial contaminations of alternative heating oils

Surger

Mayer

Shivaram

et al. 2023

Engineering in Life Sciences

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Since 2008, European and German legislative initiatives for climate protection and reduced dependency on fossil resources led to the introduction of biofuels as CO 2 -reduced alternatives in the heating oil sector. In the case of biodiesel, customers were confronted with accelerated microbial contaminations during storage. Since then, other fuel alternatives, like hydrogenated vegetable oils (HVOs), gas-to-liquid (GtL) products, or oxymethylene ether (OME) have been developed. In this study, we use online monitoring of microbial CO 2 production and the simulation of onset of microbial contamination to investigate the contamination potential of fuel alternatives during storage. As references, fossil heating oil of German refineries are used. Biodiesel blends with fossil heating oils confirmed the promotion of microbial activity. In stark contrast, OMEs have an antimicrobial effect. The paraffinic Fischer-Tropsch products and biogenic hydrogenation products demonstrate to be at least as resistant to microbial contamination as fossil heating oils despite allowing a diversity of representative microbes. Through mass spectrometry, elemental analysis, and microbial sequencing, we can discuss fuel properties that affect microbial contaminations. In summary, novel, non-fossil heating oils show clear differences in microbial resistance during long-term storage. Designing blends with an intrinsic resistance against microbial contamination and hence reduced activity might be an option.

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Oxymethylenether Als Dieselkraftstoffzusätze Der Zukunft

Cited by 28 publications

References 2 publications

Chemical Compounds for Energy Storage

Chemical Compounds for Energy Storage

Detailed kinetic modeling of dimethoxymethane. Part I: Ab initio thermochemistry and kinetics predictions for key reactions

Evaluating microbial contaminations of alternative heating oils

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