Environmental impact assessment of hydrogen production via steam methane reforming based on emissions data

Cho, Hannah Hyunah; Strezov, Vladimir; Evans, Tim

doi:10.1016/j.egyr.2022.10.053

Cited by 39 publications

(18 citation statements)

References 40 publications

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“…Ngo et al [34] utilised a SMR unit with a furnace and a reactor, where the furnace produces heat via the natural gas reaction with oxygen and the reactor consumes heat and generates H2. Another study conducted by Cho et al [35] used facility-level data to examine the pollutant emissions which may differ from the theoretical estimates due to various process conditions and types of pollution controlled equipment. Direct emissions from the 33 facilities used were 9.35 kg CO2/kg H2 and increased up to 11.2 kg CO2/kg H2 when the full cycle of H2 production was included.…”

Section: Hydrogen Production Routesmentioning

confidence: 99%

Recent progress for hydrogen production from ammonia and hydrous hydrazine decomposition: A review on heterogeneous catalysts

et al. 2023

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Section: Hydrogen Production Routesmentioning

confidence: 99%

Recent progress for hydrogen production from ammonia and hydrous hydrazine decomposition: A review on heterogeneous catalysts

et al. 2023

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“…The reaction is a heat absorption process with high energy consumption and operates in a high-temperature furnace (700–1000 °C), requiring high equipment materials. There is a large amount of CO in the product after the conversion of CH 4 and steam, the water–gas shift (WGS) reaction reduces the concentration of CO and increases the yield of H 2 , but produces more CO 2 . Finally, CO 2 , CH 4 , and CO and steam need to be separated from H 2 , which makes the whole process of hydrogen production complicated and adds the cost of generation.…”

Section: Introductionmentioning

confidence: 99%

“…There is a large amount of CO in the product after the conversion of CH 4 and steam, the water–gas shift (WGS) reaction 15 reduces the concentration of CO and increases the yield of H 2 , but produces more CO 2 . 16 Finally, CO 2 , CH 4 , and CO and steam need to be separated from H 2 , which makes the whole process of hydrogen production complicated and adds the cost of generation. This is detrimental to large-scale hydrogen production and CO 2 capture; therefore, there is urgency to develop an efficient technology for methane hydrogen production in order to further improve hydrogen production efficiency and reduce costs.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Effect of CaO on Hydrogen Production by Sorption-Enhanced Steam Methane Reforming

Luo,

Chen,

Wang

2024

ACS Omega

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The effect of heat released during CaO adsorption on sorption-enhanced steam methane reforming for hydrogen production is insufficiently understood. On this basis, Aspen Plus is used to study the effect of steam methane reforming on hydrogen production without/with CaO. At 700 °C and an O 2 inflow of 7 mol/h, the molar flow and molar percentages of H 2 are 20.62 and 67.35%. After adding CaO, at 700 °C with 4.5 mol/h of CaO, the heat release of CaO adsorption is 1.32 MJ/h, and the O 2 inflow reduces to 4.3 mol/h. The molar flow and molar percentage of H 2 are 22.80 mol/h and 85.94%. When 1.2 mol/h CH 4 is combusted for CaCO 3 decomposition in the calciner, regenerated CaO is transferred to the reforming reactor for calcium cycling, which consumes 2.4 mol/h of O 2 . For the entire cycle, 6.7 mol/h of O 2 .

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“…Conventionally, syngas is produced from natural gas using steam reforming (SRM) . Although this technology is industrially matured and energy efficient (74–85%), its environmental impacts in terms of CO 2 emissions (kg CO 2 /kg H 2 produced) is significant. , Instead of using CH 4 of fossil origin, the production of syngas by reforming CH 4 from renewable sources such as biogas or landfill gas can mitigate or lower the environmental impacts . Biogas produced from the microbial activity of organic matter under anaerobic conditions is a CH 4 -rich renewable energy source and contains CO 2 as the other major constituent.…”

Section: Introductionmentioning

confidence: 99%

Investigating Reforming Kinetics of a Synthetic Biogas Mixture on Ni: Model Development and Experimental Validation

Ponugoti

Janardhanan

2023

Ind. Eng. Chem. Res.

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A thermodynamically consistent mechanistic rate model for steam reforming (SRM) and catalytic partial oxidation (CPOx) of a synthetic biogas mixture on a Ni catalyst is derived in this work. A microkinetic model (MKM) consisting of 42 irreversible reactions served as the starting point for the development of the model equations presented in this study. A global sensitivity analysis based on ANOVA using Sobol sampling is conducted on the MKM to identify important reactions that describe SRM, CPOx, and water−gas shift reaction (WGSR), which occur alongside CH 4 reforming. The unimportant reactions are eliminated to obtain a reduced elementary reaction model, which is subjected to validation by reproducing the predictions of 42 reactions of the MKM. The rate-determining steps (rds) are identified for SRM, WGSR, and CPOx, from the reduced mechanism by using a net reaction rate and partial equilibrium analysis. Mechanistic rate expressions are derived from the identified rds by adopting the Langmuir−Hinshelwood− Hougen−Watson approach. The parameters of these mechanistic rate models for SRM, WGSR, and CPOx are estimated by using a real coded genetic algorithm. The rate models with the estimated parameters could reproduce the experimental observations with good accuracy. The predictive capability of the derived rate models is established by comparing the model predictions with the experimental measurements of SRM, combined steam and dry reforming, and trireforming. The reforming experiments were performed for a synthetic biogas mixture containing CH 4 /CO 2 = 2, in a packed bed reactor using 10 wt % Ni/γ-Al 2 O 3 . Overall the mechanistic models were able to predict the experimental measurements with good accuracy.

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Environmental impact assessment of hydrogen production via steam methane reforming based on emissions data

Cited by 39 publications

References 40 publications

Recent progress for hydrogen production from ammonia and hydrous hydrazine decomposition: A review on heterogeneous catalysts

Recent progress for hydrogen production from ammonia and hydrous hydrazine decomposition: A review on heterogeneous catalysts

Evaluation of the Effect of CaO on Hydrogen Production by Sorption-Enhanced Steam Methane Reforming

Investigating Reforming Kinetics of a Synthetic Biogas Mixture on Ni: Model Development and Experimental Validation

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