H2-based synthetic fuels: A techno-economic comparison of alcohol, ether and hydrocarbon production

Schemme, Steffen; Breuer, Janos Lucian; Köller, Maximilian; Meschede, Sven; Walman, Fiona; Samsun, Remzi Can; Peters, Ralf; Stolten, Detlef

doi:10.1016/j.ijhydene.2019.05.028

Cited by 141 publications

(111 citation statements)

References 44 publications

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“…A Monte Carlo simulation-based sensitivity analysis indicates that the 95% confidence interval for the DME minimal sales price ranges from 1828-2322 h per t. 343 Schemme 78 who also considers the direct synthesis of DME and estimates costs of 1390 h per t. The sensitivity analysis shows that after hydrogen and CO 2 costs, the fixed capital investment has the biggest effect on DME costs. 344 In China with its big DME market, prices in 2020 varied between 329 h per t und 276 h per t, leading to a big spread in PtDME production costs. 345,346…”

Section: Flexibility and Dynamic Operation Research On The Flexibilimentioning

confidence: 99%

“…However, depending on the PtL product, different cost reductions are necessary to achieve cost competitiveness. Based on the evaluations by Schemme et al 344 cost shares of the H 2 supply for the discussed PtL process routes can be estimated. In the case of methanol synthesis, the H 2 supply covers a share of approximately 83%.…”

Section: Remarks On Future Power-to-liquid Applicationsmentioning

confidence: 99%

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Power-to-liquidviasynthesis of methanol, DME or Fischer–Tropsch-fuels: a review

Dieterich

Buttler

Hánel

et al. 2020

Energy Environ. Sci.

427

246

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Section: Flexibility and Dynamic Operation Research On The Flexibilimentioning

confidence: 99%

Section: Remarks On Future Power-to-liquid Applicationsmentioning

confidence: 99%

Power-to-liquidviasynthesis of methanol, DME or Fischer–Tropsch-fuels: a review

Dieterich

Buttler

Hánel

et al. 2020

Energy Environ. Sci.

427

246

View full text Add to dashboard Cite

show abstract

“…At present, the direct synthesis of formaldehyde and methanol by Oestrich [104] and the endothermic dehydrogenation of methanol as proposed by Ouda et al [105,106] are challenging research topics. Process analysis utilizes Aspen Plus or ChemCad simulations and has been performed by various research groups [105][106][107][108][109][110][111][112][113]. An important finding of process analyses is that the high power consumption entailed by Oxymethylenether (OME) synthesis requires special heat management.…”

Section: Power-to-fuelmentioning

confidence: 99%

Future Power Train Solutions for Long-Haul Trucks

et al. 2021

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Achieving the CO2 reduction targets for 2050 requires extensive measures being undertaken in all sectors. In contrast to energy generation, the transport sector has not yet been able to achieve a substantive reduction in CO2 emissions. Measures for the ever more pressing reduction in CO2 emissions from transportation include the increased use of electric vehicles powered by batteries or fuel cells. The use of fuel cells requires the production of hydrogen and the establishment of a corresponding hydrogen production system and associated infrastructure. Synthetic fuels made using carbon dioxide and sustainably-produced hydrogen can be used in the existing infrastructure and will reach the extant vehicle fleet in the medium term. All three options require a major expansion of the generation capacities for renewable electricity. Moreover, various options for road freight transport with light duty vehicles (LDVs) and heavy duty vehicles (HDVs) are analyzed and compared. In addition to efficiency throughout the entire value chain, well-to-wheel efficiency and also other aspects play an important role in this comparison. These include: (a) the possibility of large-scale energy storage in the sense of so-called ‘sector coupling’, which is offered only by hydrogen and synthetic energy sources; (b) the use of the existing fueling station infrastructure and the applicability of the new technology on the existing fleet; (c) fulfilling the power and range requirements of the long-distance road transport.

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“…This can be done by biogenic or synthetic fuels. As the availability of renewable fuels is likely to be a challenge and the costs are expected to be higher than for fossil fuels, the future efforts for efficiency improvement will be driven by economic, rather than ecological reasons [33][34][35].…”

Section: Introductionmentioning

confidence: 99%

Increased Internal Combustion Engine Efficiency with Optimized Valve Timings in Extended Stroke Operation

et al. 2021

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Spark-ignited internal combustion engines are known to exhibit a decreased brake efficiency in part-load operation. Similarly to cylinder deactivation, the x-stroke operation presented in this paper is an adjustable form of skip-cycle operation. It is an effective measure to increase the efficiency of an internal combustion engine, which has to be equipped with a variable valve train to enable this feature. This paper presents an optimization procedure for the exhaust valve timings applicable to any valid stroke operation number greater than four. In the first part, the gas spring operation, during which all gas exchange valves are closed, is explained, as well as how it affects the indicated efficiency and the blow-by mass flow. In the second part, a simulation model with variable valve timings, parameterized with measurement data obtained on the engine test, is used to find the optimal valve timings. We show that in 12-stroke operation and with a cylinder load of 5 Nm, an indicated efficiency of 34.3% is achieved. Preloading the gas spring with residual gas prevents oil suction and thus helps to reduce hydrocarbon emissions. Measurements of load variations in 4-, 8-, and 12-stroke operations show that by applying an x-stroke operation, the indicated efficiency remains high and the center of combustion remains optimal in the range of significantly lower torque outputs.

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H2-based synthetic fuels: A techno-economic comparison of alcohol, ether and hydrocarbon production

Cited by 141 publications

References 44 publications

Power-to-liquidviasynthesis of methanol, DME or Fischer–Tropsch-fuels: a review

Power-to-liquidviasynthesis of methanol, DME or Fischer–Tropsch-fuels: a review

Future Power Train Solutions for Long-Haul Trucks

Increased Internal Combustion Engine Efficiency with Optimized Valve Timings in Extended Stroke Operation

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