Applications in Energy and Combustion Science最新文献

{"title":"Towards detailed combustor wall kinetics: An experimental and kinetic modeling study of hydrogen oxidation on Inconel","authors":"Wenxian Tang ,&nbsp;Andre Nicolle ,&nbsp;Qi Wang ,&nbsp;Andres Cardenas-Alvarez ,&nbsp;Bambar Davaasuren ,&nbsp;S. Mani Sarathy","doi":"10.1016/j.jaecs.2024.100281","DOIUrl":"10.1016/j.jaecs.2024.100281","url":null,"abstract":"<div><p>Gas-phase hydrogen combustion is ubiquitous in industrial processes, and the associated surface kinetics on heat-resistant alloys plays a crucial role in designing efficient low-carbon technologies. We conducted new temperature programmed reduction experiments to determine the reducibility of materials following an oxidation cycle. These experiments were modeled using a thermoconsistent multi-site microkinetic model for H₂ heterogeneous oxidation on Inconels, which was validated against literature experiments. This competitive adsorption model considers iron bulk content, hydrogen spillover and subsurface oxygen migration on hydrogen surface oxidation kinetics. New X-ray diffraction experiments confirmed the postulated crystallographic structures in the Inconel samples, suggesting their presence on the surface scale. The phenomenological model was coupled with several state-of-the-art gas-phase oxidation mechanisms to assess gas/surface reactions interaction as a function of material and temperature. The results reveal a complex interaction in which surface removes H radicals from the gas-phase, while the Bradford (H₂+OH) reaction converts OH into H₂O, promoting water adsorption on Inconel. This interaction was found to give rise to gas-phase thermokinetic oscillations. The model predicts a non-monotonous effect of reactor area-to-volume ratio on reactivity and emphasizes the impact of Inconel composition on product selectivity. Overall, the multi-site model provides new insight into the contrasting reactivities among active sites, bridging the gap between material science and heterogeneous combustion modeling.</p></div>","PeriodicalId":100104,"journal":{"name":"Applications in Energy and Combustion Science","volume":"19 ","pages":"Article 100281"},"PeriodicalIF":5.0,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666352X24000360/pdfft?md5=35b70ddcf6e65b82cafd9c5faa110511&pid=1-s2.0-S2666352X24000360-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141706802","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Quasi-CJ rotating detonation with partially premixed methane-oxygen injection: Numerical simulation and experimental validation","authors":"Pierre Hellard ,&nbsp;Thomas Gaillard ,&nbsp;Dmitry Davidenko ,&nbsp;Patrick Berterretche ,&nbsp;Ratiba Zitoun ,&nbsp;Pierre Vidal","doi":"10.1016/j.jaecs.2024.100278","DOIUrl":"10.1016/j.jaecs.2024.100278","url":null,"abstract":"<div><p>The efficiency gain of rotating detonation depends on several loss factors related to the chamber geometry, the injection principle, the propellants and their mass flow rates, and the equivalence ratio. Numerical simulation can help quantify these losses, and this work presents a Large Eddy Simulation (LES) of rotating detonation in an annular chamber and its validation against experiments. The simulation captured the mixing processes, the overall dynamics of the detonation, the deflagration, and the burnt gas expansion. The injection device was numerically designed to ensure partial premixing of the propellants before injection into the chamber. The chamber had a length of 110 mm, an outer diameter of 80 mm, and a radial width of 10 mm. The mixture consisted of gaseous CH<span><math><msub><mrow></mrow><mrow><mn>4</mn></mrow></msub></math></span> and O<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> with an equivalence ratio of 1.2 and a mass flow rate of 160 g/s. Combustion kinetics was modeled using a skeletal mechanism with 62 reactions and 16 species. The boundary conditions were adiabatic slip walls. The results reproduce well the detonation velocity (within 1% deviation) and the pressure variation behind the wave. The simulated OH* chemiluminescence compares well with experimental high-speed imaging of the outlet and side of the chamber. The simulation results indicate that 65% of the propellant mass is well mixed in front of the wave whereas 15% of the mixture is burned by deflagration. They show that CH<span><math><msub><mrow></mrow><mrow><mn>4</mn></mrow></msub></math></span> and O<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> do not axially stratify because they have similar injection dynamics between periodic perturbations induced by the rotating detonation. Good propellant mixing and low deflagration losses explain the high experimental detonation velocity, about 90% of <span><math><msub><mrow><mi>D</mi></mrow><mrow><mtext>CJ</mtext></mrow></msub></math></span>, and a high combustion efficiency of 98%. These agreements between the computational and experimental results indicate that the simulation is capable of capturing the physical scales relevant to RDC operation and producing reliable results for RDC design.</p></div>","PeriodicalId":100104,"journal":{"name":"Applications in Energy and Combustion Science","volume":"19 ","pages":"Article 100278"},"PeriodicalIF":5.0,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666352X24000335/pdfft?md5=07e504d9addddbec666917b4a2591212&pid=1-s2.0-S2666352X24000335-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141637943","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"MILD combustion characteristics of a premixed CH4/air jet flame in hot coflow from a bluff-body burner","authors":"Xiangtao Liu ,&nbsp;Guochang Wang ,&nbsp;Jicang Si ,&nbsp;Pengfei Li ,&nbsp;Mengwei Wu ,&nbsp;Jianchun Mi","doi":"10.1016/j.jaecs.2024.100279","DOIUrl":"10.1016/j.jaecs.2024.100279","url":null,"abstract":"<div><p>This numerical study is designated to comparatively investigate premixed CH₄/air jet flames from bluff-body (BB) and non-BB (NBB) burners in the coflow of hot exhaust gas. Specifically, traditional combustion (TC) from BB burner (BB-TC), MILD combustion (MC) from BB burner (BB-MC), and NBB burner (NBB-MC) under varying coflow temperatures (<em>T</em>_C) and oxygen concentrations (<em>Y</em>_{O2, C}) are considered. The flow field, combustion reactions, temperature rise, heat release, along with reaction zone, and pollutant emissions are thoroughly investigated. The findings underscore the feasibility of achieving MILD combustion using the BB burner. Remarkably, the small recirculation zone generated by the BB enhances entrainment and mixing, leading to superior combustion stability and reduced CO emission in the BB-MC case compared to the conventional NBB-MC case. Moreover, the BB-MC case exhibits a higher peak temperature, reaction rate, and heat release rate than the NBB-MC case, albeit with slightly higher NO emission. When compared to the BB-TC case, NO emission from both the BB-MC and NBB-MC cases are significantly lower, particularly under relatively low <em>T</em>_C and <em>Y</em>_{O2, C} conditions.</p></div>","PeriodicalId":100104,"journal":{"name":"Applications in Energy and Combustion Science","volume":"19 ","pages":"Article 100279"},"PeriodicalIF":5.0,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666352X24000347/pdfft?md5=ee9364dae841baf08081ea86d7cf4555&pid=1-s2.0-S2666352X24000347-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141704127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dynamics of regime transition of autoignitive jet flames from conventional to MILD combustion","authors":"Aravind Ramachandran ,&nbsp;Abinash Sahoo ,&nbsp;Venkateswaran Narayanaswamy ,&nbsp;Kevin M. Lyons","doi":"10.1016/j.jaecs.2024.100277","DOIUrl":"https://doi.org/10.1016/j.jaecs.2024.100277","url":null,"abstract":"<div><p>Turbulent combustion of jet flames in a hot diluted coflow of combustion products has been studied across a range of jet Reynolds numbers for propane, ethylene, and an ethylene-propane blend as fuels. The study revealed a transition from conventional autoignitive combustion to a regime of Moderate or Intense Low-oxygen Dilution (MILD) combustion, which is characterized by a nearly invisible flame. The flames studied are luminous at low jet velocities and become MILD at higher jet velocities. Planar Laser-Induced Fluorescence (PLIF) of formaldehyde (<span><math><mrow><mi>C</mi><msub><mi>H</mi><mn>2</mn></msub><mi>O</mi></mrow></math></span>), a key intermediate species in hydrocarbon combustion, is combined with CH*-chemiluminescence imaging and Rayleigh scattering to investigate the phenomena. The transition to MILD combustion is found to accompany a broadening of the formaldehyde region, indicating a broader low-temperature reaction zone. As the transition is approached, the appearance of holes in the chemiluminescent front is also observed. Correspondence between the location and structure of these holes with regions of formaldehyde in the flame are illustrated. These regions are proposed to be signatures that precede the transition to a fully MILD flame. In other words, the transition to MILD combustion begins at a local level and the MILD region spreads to engulf the entire combusting mixture. Scalar gradients were imaged to further unravel the local turbulence/chemistry interactions that yield the MILD inception. The measured scalar gradients were found to be commensurate with scalar gradients obtained from chemical kinetic simulations at the stoichiometric mixture fractions, while being an order of magnitude larger at other locations; this suggests that the inception of MILD combustion occurs near the stoichiometric region.</p></div>","PeriodicalId":100104,"journal":{"name":"Applications in Energy and Combustion Science","volume":"19 ","pages":"Article 100277"},"PeriodicalIF":5.0,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666352X24000323/pdfft?md5=d63cc13d678b65899f6e076d6de26b37&pid=1-s2.0-S2666352X24000323-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141539573","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Flamelet LES of pulverized coal combustion and NO formation characteristics in a supercritical CO2 boiler","authors":"Xinzhou Tang ,&nbsp;Chunguang Zhao ,&nbsp;Jiangkuan Xing ,&nbsp;Ruipeng Cai ,&nbsp;Kun Luo ,&nbsp;Jianren Fan ,&nbsp;Mingyan Gu","doi":"10.1016/j.jaecs.2024.100274","DOIUrl":"https://doi.org/10.1016/j.jaecs.2024.100274","url":null,"abstract":"<div><p>In the present study, LESs of a modeled typical combustion zone of a 1000 MW S-CO₂ coal-fired boiler using a hybrid flamelet/progress variable model are conducted for the first time. In the hybrid model, both the fuel-N from volatiles and char are considered, and two progress variables are used for major species and NO, respectively. The combustion and NO formation characteristics at different regions are qualitatively and quantitatively investigated. The results indicate that the mixture of primary air and secondary air, the high-temperature wall as well as the adjacent flame can promote the pulverized coal combustion (PCC) and NO formation. In addition, the effects of wall temperature and flue gas recirculation on PCC and NO formation are investigated. The results show that compared with the supercritical H₂O boiler, a slight rise of 2.08% and 3.05% for temperature and NO production can be observed in the supercritical CO₂ boiler due to a higher wall temperature; flue gas recirculation with a recirculation rate of 27% can effectively reduce the production of NO by 57.6% in the supercritical CO₂ boiler.</p></div>","PeriodicalId":100104,"journal":{"name":"Applications in Energy and Combustion Science","volume":"19 ","pages":"Article 100274"},"PeriodicalIF":0.0,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666352X24000293/pdfft?md5=28efbb189b70b3500ebd054966244a2b&pid=1-s2.0-S2666352X24000293-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141328317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"MILD combustion stabilization issues through the analysis of hysteresis behaviors: The case of new energy carriers","authors":"P. Sabia ,&nbsp;M.V. Manna ,&nbsp;F. Mauss ,&nbsp;R. Ragucci","doi":"10.1016/j.jaecs.2024.100276","DOIUrl":"https://doi.org/10.1016/j.jaecs.2024.100276","url":null,"abstract":"<div><p>MILD combustion processes are renewed to reveal a strong resilience to extinction phenomena and/or instabilities, whereas the oxidation process is stabilized trough ignition phenomena. Under MILD conditions, igni-diffusive and/or perfectly mixed kernels, forming during the mixing process between hot products and fresh reactants, are so much diluted and pre-heated to escape classical feed-back flammable flames stabilization mechanisms, while ignition and extinction events merge in a unique condition through “anhysteretic” behaviors. So far, considering methane as reference fuel, it has been largely demonstrated the mentioned “anhysteretic” condition is very conservative and defines a sub-domain of MILD combustion processes, following Cavaliere and de Joannon's definition. Furthermore, the coincidence of ignition and extinction phenomena can occur also preserving hysteresis phenomena. In turns, this condition strongly enlarges the stabilization domain of MILD combustion processes, starting from the upper branch of the hysteresis behaviors to the real extinction, with characteristic unstable loci to consider as further/last opportunity to promote stable operative conditions through the formation of local thermo-kinetic conditions in the combustion chamber during hot products/fresh reactants mixing process (injection configuration/burner design), or by forced ignition events. The hysteresis behaviors of renewable/alternative fuels, relevant within the decarbonization policies of several energy sectors, are thoroughly discussed under MILD conditions through numerical studies in model reactors in order to shed light on common and/or different features, and outline practical rules towards the definition of stable MILD combustion domains. Results show that, as MILD combustion is a chemical kinetics-driven processes, stability issues have to be discussed in relation to fuel nature, albeit with common behavior can be derived. The coincidence between extinction/ignition phenomena is reached for extremely diluted conditions, already ascribable to MILD combustion conditions, thus defining a small sub-domain of the process. This condition can be reached through “hysteretic” or “anhysteretic” behaviors.</p></div>","PeriodicalId":100104,"journal":{"name":"Applications in Energy and Combustion Science","volume":"19 ","pages":"Article 100276"},"PeriodicalIF":0.0,"publicationDate":"2024-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666352X24000311/pdfft?md5=b3f17574829838af82d217d154d272c1&pid=1-s2.0-S2666352X24000311-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141250922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Furnace MILD combustion versus its open counterpart in hot coflow","authors":"X. Liu ,&nbsp;G. Wang ,&nbsp;J. Si ,&nbsp;M. Wu ,&nbsp;M.F. Hanif ,&nbsp;J. Mi","doi":"10.1016/j.jaecs.2024.100275","DOIUrl":"https://doi.org/10.1016/j.jaecs.2024.100275","url":null,"abstract":"<div><p>The open jet flame in hot co-flow (JHC) has been frequently utilized for fundamental investigations of Moderate or Intense Low-oxygen Dilution (MILD) combustion due to its controllable conditions and relatively easy measurement capabilities. However, practical MILD combustion must take place within a combustor that is enclosed. Therefore, it is necessary to examine the similarity and disparity of combustion characteristics between two flame configurations. This issue is addressed currently. Specifically, we investigate the flow mixing, ignition, and combustion, as well as emission characteristics of non-premixed and premixed JHC and cylindrical furnace (FUR) flames at various values of the environmental temperature (<em>T_e</em>) and central jet Reynolds number (<em>Re</em>). For the open non-premixed flames, we employ both previous single-tube JHC (SJHC) combustor and presently modified JHC (MJHC) one that uses the same nozzle configuration as the FUR burner. It is revealed that significant differences occur in flow, combustion and emission characteristics between the SJHC and FUR cases. On the other hand, both non-premixed and premixed MJHC configurations exhibit high similarity to the corresponding FUR cases in terms of upstream flow mixing and combustion features. Moreover, different CO and NO<em>_x</em> emissions result from open JHC and close furnace flames due to different post-combustion configuration and residence time. Accordingly, future experiments on non-premixed MJHC and premixed JHC flames are highly recommended for better understanding practical MILD combustion.</p></div>","PeriodicalId":100104,"journal":{"name":"Applications in Energy and Combustion Science","volume":"19 ","pages":"Article 100275"},"PeriodicalIF":0.0,"publicationDate":"2024-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666352X2400030X/pdfft?md5=c98df884d8d37eea3fb9b6251afcc1b0&pid=1-s2.0-S2666352X2400030X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141163353","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigation of differential diffusion in lean, premixed, hydrogen-enriched swirl flames","authors":"Benjamin Francolini ,&nbsp;Luming Fan ,&nbsp;Ehsan Abbasi-Atibeh ,&nbsp;Gilles Bourque ,&nbsp;Patrizio Vena ,&nbsp;Jeffrey Bergthorson","doi":"10.1016/j.jaecs.2024.100272","DOIUrl":"10.1016/j.jaecs.2024.100272","url":null,"abstract":"<div><p>Hydrogen combustion is a promising alternative to fossil fuel combustion in an effort to reduce our carbon footprint. However, hydrogen combustion is prone to thermodiffusive instabilities largely dependent on differential diffusion, a phenomenon that can lead to higher probabilities of flashback in industrial burners, given hydrogen’s high reactivity and diffusivity. This paper evaluates low-swirl flames of methane and air enriched with hydrogen to highlight the onset of differential diffusion. Testing was conducted in a fully controllable swirl burner, where bulk velocity <em>U</em><span><math><msub><mrow></mrow><mrow><mtext>av</mtext></mrow></msub></math></span> = 13 m/s and swirl number <em>S</em> = 0.6 were kept constant for each hydrogen–methane blend to isolate increases in flame surface area from increases in turbulence intensity. Furthermore, each fuel blend of hydrogen and methane is evaluated at the same laminar flame speed of <em>S</em><span><math><msubsup><mrow></mrow><mrow><mtext>L</mtext></mrow><mrow><mtext>o</mtext></mrow></msubsup></math></span> = 0.267 m/s to isolate flame stretch effects on the turbulent burning rate. Combined hydroxyl (OH) PLIF and stereoscopic PIV at the National Research Council of Canada were used to analyze the OH fluorescence in a 2D-3C velocity field for each flame condition. High-speed PIV at McGill University was used to resolve local flame phenomena, such as local flame displacement velocity and flame stretch rate. Using these techniques, it can be observed that the flame displaces axially in response to turbulent flame speed while exhibiting increases in flamefront wrinkling. This increased corrugation due to flame stretch is highlighted in the PDFs of local curvature and <span><math><mi>κ</mi></math></span><em>S</em><span><math><msub><mrow></mrow><mrow><mi>f</mi></mrow></msub></math></span> and is further evidenced by a shift towards positive curvatures (<span><math><mi>κ</mi></math></span> <span><math><mo>&gt;</mo></math></span> 0) for increasing H<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> volume fraction. This trend suggests that there is a strong correlation with increases in turbulent burning rate and positive curvature as a result of differential diffusion, but it is not necessarily a control mechanism of the most forward propagating points proposed by <em>the theory of leading points</em>.</p></div>","PeriodicalId":100104,"journal":{"name":"Applications in Energy and Combustion Science","volume":"18 ","pages":"Article 100272"},"PeriodicalIF":0.0,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666352X2400027X/pdfft?md5=cc355b255e38ffd3de13eb4849fc00f6&pid=1-s2.0-S2666352X2400027X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141056644","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enabling plastic waste gasification by autothermal chemical looping with > 90 % syngas purity for versatile feedstock handling","authors":"Eric Falascino ,&nbsp;Rushikesh K. Joshi ,&nbsp;Sonu Kumar,&nbsp;Tanay Jawdekar,&nbsp;Ishani K. Kudva,&nbsp;Shekhar G. Shinde,&nbsp;Zhuo Cheng,&nbsp;Andrew Tong,&nbsp;Liang-Shih Fan","doi":"10.1016/j.jaecs.2024.100270","DOIUrl":"10.1016/j.jaecs.2024.100270","url":null,"abstract":"<div><p>The chemical looping gasification of plastics (CLGP) is a process that offers an innovative solution for transforming post-consumer waste plastics into high-value products. The process utilizes a co-current moving bed reducer reactor with iron-titanium-based oxygen carriers to gasify plastic feed and generate syngas autothermally. Its distinguishing feature is its ability to operate over a wide range of feed loadings and co-injection of mixed plastic species without any performance losses. Isothermal bench-scale experiments reveal a syngas purity of ∼95 %, aligning with the thermodynamic simulations. The moving bed reactor facilitates a deeper reduction of the oxygen carriers to the Fe+FeTiO₃ phase, leading to the high syngas purity, which is then verified with additional TGA, XRD, and SEM analysis. For an autothermal operation of CLGP process, an active material content of 20 % is found to be sufficient to satisfy the kinetic and thermodynamic constraints. Further integration with downstream production of H₂ is presented and compared to a steam gasification process. The process integration simulations show that the CLGP process outperforms the steam gasification system in terms of Cold Gas Efficiency (CGE), Effective Thermal Efficiency (ETE), and H₂ yield. CO₂ emissions are impressively reduced by ∼30 % in the CLGP system over that in the steam gasification system due to its ability to autothermally operate the process, unlike the highly endothermic steam gasification process.</p></div>","PeriodicalId":100104,"journal":{"name":"Applications in Energy and Combustion Science","volume":"19 ","pages":"Article 100270"},"PeriodicalIF":0.0,"publicationDate":"2024-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666352X24000256/pdfft?md5=2ca282e784178787361189692ab6b850&pid=1-s2.0-S2666352X24000256-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141023838","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Industry R&D needs in hydrogen safety","authors":"Harri Kytömaa ,&nbsp;Achim Wechsung ,&nbsp;Georgios Dimitrakopoulos ,&nbsp;Neil Cook ,&nbsp;Daniel Jaimes ,&nbsp;In Young Hur ,&nbsp;Sahand Faraji","doi":"10.1016/j.jaecs.2024.100271","DOIUrl":"10.1016/j.jaecs.2024.100271","url":null,"abstract":"<div><p>Hydrogen's unique physicochemical and combustion properties make it stand out among fuels as new hydrogen production technologies, means of transportation, and consumers emerge. The future viability of these technological solutions will depend on numerous factors, including safety, environmental, regulatory, and economic considerations. Safe deployment of these technologies requires additional research and development activities. These range from an improved quantitative understanding of hydrogen leaks, material limitations due to embrittlement, very large-volume liquefied hydrogen storage and transport, to equipment- and usage-specific considerations as is the case for gas turbines and electrolyzers.</p></div>","PeriodicalId":100104,"journal":{"name":"Applications in Energy and Combustion Science","volume":"18 ","pages":"Article 100271"},"PeriodicalIF":0.0,"publicationDate":"2024-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666352X24000268/pdfft?md5=2b0520b1e4e3c053b04414f108a1f57c&pid=1-s2.0-S2666352X24000268-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141057495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}