A low-temperature partial-oxidation-methanol micro reformer with high fuel conversion rate and hydrogen production yield

Wang, Hsueh-Sheng; Huang, Kuo-Yang; Huang, Yumeng; Su, Yu-Chuan; Tseng, Fan‐Gang

doi:10.1016/j.apenergy.2014.10.033

Cited by 33 publications

(6 citation statements)

References 31 publications

(26 reference statements)

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“…Out of these, methanol has been widely used as a liquid fuel for production of hydrogen by different conversion technologies because of its high H 2 content, low-cost, easy storage and convenient transportation [ 16 , 25 , 26 , 27 , 28 , 29 , 30 ]. Recently, many methods have been introduced for the production of hydrogen such as stream reforming of methanol and natural gas [ 20 , 21 , 27 ], partial oxidation of methanol [ 31 , 32 , 33 , 34 ], gasification of coal [ 22 ], and electrolysis of methanol-water [ 23 ]. Hydrogen yield of 20 mol % was achieved by Gondal et al.…”

Section: Introductionmentioning

confidence: 99%

Enhanced hydrogen generation efficiency of methanol using dielectric barrier discharge plasma methodology and conducting sea water as an electrode

Panda

Sahu

2020

Heliyon

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In this work, methanol decomposition method has been discussed for the production of hydrogen gas with the application of plasma. A simple dielectric barrier discharge (DBD) plasma reactor was designed for this purpose with two types of electrode. The DBD plasma reactor was experimented by substituting one of the metal electrodes with feebly conducting sea water which yielded better efficiency in producing hydrogen gas. Experimental parameters such as; discharge voltage and time were varied by maintaining a discharge gap of 1.5 mm and the plasma discharge characteristics were studied. Filamentary type micro-discharges were found to be formed which was observed as numerous streamer clusters in the current waveform. Gas chromatographic study confirmed the production of hydrogen gas with residence time around 3.6 min. Although, the concentration (%) of H 2 was high (98.1 %) and consistent with copper electrode assembly, the rate of formation and concentration was found to be the highest (98.7 %) for water electrode for specific discharge voltage. The energy efficiency was found to be 0.5 mol H 2 /kWh and 1.2 mol H 2 /kWh for metal (Cu) and water electrodes respectively. The electrode material significantly affects the plasma condition and hence the rate of hydrogen production. Compositional analysis of the water used as electrode showed a minimal change in the composition even after the completion of the experiment as compared to the untreated water. Methanol degradation study shows the presence of untreated methanol in the residue of the plasma reactor which has been confirmed from the absorption spectra.

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Section: Introductionmentioning

confidence: 99%

Enhanced hydrogen generation efficiency of methanol using dielectric barrier discharge plasma methodology and conducting sea water as an electrode

Panda

Sahu

2020

Heliyon

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“…The growing interest in fuel cell technology has led to the development of a variety of solutions for small‐scale reforming systems and hydrogen production. Most portable reforming systems combined with fuel cells concentrate on: methanol , ethanol , and on propane reforming. This is due to the high‐energy density and because fuel supply is readily available and widely used for portable applications.…”

Section: Introductionmentioning

confidence: 99%

“…The reforming system has to be carefully selected from the available options for the specific application. Catalytic partial oxidation (CPOX) is less energy efficient than steam reforming or autothermal reforming . However, a heat exchanger is not required by this exothermic process and the system is more compact.…”

Section: Introductionmentioning

confidence: 99%

Catalytic Reforming System Suitable for Transportation Applications

Majewski

Bossel²,

Steinberger‐Wilckens

2018

Fuel Cells

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The paper describes operation and optimization of an onboard reforming system for an auxiliary power unit solid oxide fuel cell (SOFC APU) system for trucks that use liquid natural gas as fuel. The reformer system is based on partial oxidation and produces a reformate gas flow sufficient for a 100 W fuel cell. The ALMUS AG concept and configuration of the SOFC APU unit is described. The paper presents analyses of the efficiency of the partial oxidation reformer. The selected catalyst AB10 is analyzed under various reaction temperatures and molar ratios of CH4:air. Two reforming reactor configurations are tested; both with 5 g of the catalyst. The optimal operating conditions for the reactor are proposed. The reformer is currently operated in an electric furnace that simulates the actual system and condition in a combustion chamber. The main focus is to obtain stable operation with high hydrogen yield and low coke deposition. The paper presents analyses of a 1,000 h partial oxidation stability test. The demonstration of the performance of the CPOX reformer confirms the system applicability. The observed slow catalyst deactivation is attributed to the detected coke deposition. The change to the structure of deposited coke along the reactor is explained.

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“…In these designs, the main idea of increase reforming performance was to enhance heat transfer efficiency, which helps build up low gradient temperature distribution in the micro reformers. On the other hand, uniform flows were found to be an important factor in microreactors for achieving high performance [ 14 – 16 ]. Therefore, novel reactor structure was proposed to improve both flow distribution and heat transfer.…”

Section: Introductionmentioning

confidence: 99%

High yields of hydrogen production from methanol steam reforming with a cross-U type reactor

Zhang

Chen

et al. 2017

PLoS ONE

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This paper presents a numerical and experimental study on the performance of a methanol steam reformer integrated with a hydrogen/air combustion reactor for hydrogen production. A CFD-based 3D model with mass and momentum transport and temperature characteristics is established. The simulation results show that better performance is achieved in the cross-U type reactor compared to either a tubular reactor or a parallel-U type reactor because of more effective heat transfer characteristics. Furthermore, Cu-based micro reformers of both cross-U and parallel-U type reactors are designed, fabricated and tested for experimental validation. Under the same condition for reforming and combustion, the results demonstrate that higher methanol conversion is achievable in cross-U type reactor. However, it is also found in cross-U type reactor that methanol reforming selectivity is the lowest due to the decreased water gas shift reaction under high temperature, thereby carbon monoxide concentration is increased. Furthermore, the reformed gas generated from the reactors is fed into a high temperature proton exchange membrane fuel cell (PEMFC). In the test of discharging for 4 h, the fuel cell fed by cross-U type reactor exhibits the most stable performance.

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A low-temperature partial-oxidation-methanol micro reformer with high fuel conversion rate and hydrogen production yield

Cited by 33 publications

References 31 publications

Enhanced hydrogen generation efficiency of methanol using dielectric barrier discharge plasma methodology and conducting sea water as an electrode

Enhanced hydrogen generation efficiency of methanol using dielectric barrier discharge plasma methodology and conducting sea water as an electrode

Catalytic Reforming System Suitable for Transportation Applications

High yields of hydrogen production from methanol steam reforming with a cross-U type reactor

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