The Heatpipe Reformer with optimized combustor design for enhanced cold gas efficiency

Leimert, Jonas M.; Treiber, Peter; Karl, Jürgen

doi:10.1016/j.fuproc.2015.04.026

Cited by 15 publications

(10 citation statements)

References 7 publications

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“…This mainly depends on the combustor efficiency, η comb , which is already discussed in our works on the heatpipe reformer (refs and ). The following discussion will give only a short overview on the calculations for the cold gas and combustor efficiency.…”

Section: Materials and Methodsmentioning

confidence: 83%

“…The most important losses are sensible heat in the remaining flue and synthesis gas. At the Agnion plant in Pfaffenhofen, a maximum cold gas efficiency of 70% was measured at a carbon conversion rate of 80% and a total fuel input of 500 kW. , In previous published results on the combustion chamber, a cold gas efficiency of 75% was predicted for the EVT combustor design . This was possible because of the extremely low CO emissions, which allow air ratios as low as 1.2, resulting in high combustor efficiencies above 60% (see Figure ).…”

Section: Materials and Methodsmentioning

confidence: 98%

“…RFCS-CT-2013-0008). Previous publications focused on the main design specifications of the system and the performance of the combustor using biomass and lignite as feedstock …”

Section: Introductionmentioning

confidence: 99%

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Performance of a 100 kW Heatpipe Reformer Operating on Lignite

et al. 2017

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The heatpipe reformer provides an allothermal gasification process for the generation of a hydrogen-rich synthesis gas. Heat pipes transport heat from a fluidized bed combustor to a steam-blown fluidized bed gasification reactor. The objective of the Institute of Energy Process Engineering (FAU-EVT) is the generation of hydrogen from the synthesis gas by means of in situ membrane separation in the fluidized bed gasification reactor. This paper presents the current state-of-the-art of the heatpipe reformer (HPR) technology as well as the recent development of the construction of the 100 kW pilot test stand at FAU-EVT and shows the results of a 24 h gasification operation. Lignite was used as feedstock. The results include the synthesis gas and tar composition, the temperature profile of the process, and the sulfur and hydrocarbon concentrations in the synthesis gas. Furthermore, the influence of gasification temperature and pressure on the synthesis gas composition and the influence of the gasification temperature on the tar composition are evaluated. In addition, the anticipated operation points of the HPR, depending on the temperature spread between combustor and reformer temperature and the HPR heat duty, are determined. The generated synthesis gas at gasification temperature of 800−930 °C had a tar content of 2.8−3.6 g/Nm 3 and a H 2 S content of 1000−2000 ppm. Conversion of methane was quite high; its content in the synthesis gas was in the range of 4−7%, resulting in a high hydrogen content of up to 56%.

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Section: Materials and Methodsmentioning

confidence: 83%

Section: Materials and Methodsmentioning

confidence: 98%

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Performance of a 100 kW Heatpipe Reformer Operating on Lignite

et al. 2017

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“…Heat transport between both reactors is provided by heat pipes. This is also a possibility for realization of allothermal gasification [34, [64][65][66][67][68][69].…”

Section: Heatpipe Reformermentioning

confidence: 99%

Biomass Gasification for Rural Electrification, Small Scale

Klemm¹

2017

Encyclopedia of Sustainability Science and Technology

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Clean gas Clean gas is the product gas after product gas treatment. Gasification Gasification is the conversion of solid or liquid fuels to gaseous fuels in a reaction with an added reaction agent. Gasifier Gasifier is the reactor for the gasification. Product gas Product gas is the burnable gas provided as a result of gasification and after gas treatment; if this gas has been adapted to the specification of a downstream synthesis, it is called synthesis gas or syngas. Product gas treatment Product gas treatment covers all proposed processes for the modification of the product gas properties. Product gas utilization Product gas utilization covers all processes for the use of the product gas, mainly for the provision of other forms of energy. Product gas application is synonymous. Raw gas Raw gas is the product gas before product gas treatment. Rural electrification Rural electrification is the mostly decentralized electrical power supply, e.g., single farms, villages, or workshops or small groups of them; the opposite is the electrification of conurbations. Small scale Small scale is the adapted scale for the provision of a single, nonindustrial energy demand; in the case of electrical power supply, often a power range of less than about 1 MW of electrical output is called small scale. Definition of the Subject Rural electrification confronts the classical, centralized electricity industry with several important challenges. The supply system is characterized by little demands scattered in the countryside. To meet each of these demands, an expensive

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“…Another application that heat pipes have been used for in reactors is the separation of heat source and sink. For example, a recent heat pipe reformer for gasification separated the reformer from the combustion chamber using heat pipes, where the heat transfer rate directly impacted upon the process efficiency [5].…”

Section: Introductionmentioning

confidence: 99%