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Enhanced post-combustion CO_(2) capture and direct air capture by plasma surface functionalization of graphene adsorbent

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Journal of Energy Chemistry 2025年第1期100卷 653-664页

作者： Rahul Navik Eryu Wang Xiao Ding Huang Yunyi Yiyu Liu Jia Li Guangdong-Hong Kong Joint Laboratory for carbon Neutrality Jiangmen Laboratory of Carbon and Science and TechnologyJiangmen 529100GuangdongChina Guangzhou HKUST Fok Ying Tung Research Institute Guangzhou 511458GuangdongChina The Hong Kong University of Science and Technology(Guangzhou) Guangzhou 511453GuangdongChina Stoddart Institute of Molecular Science Department of ChemistryZhejiang UniversityHangzhou 310058ZhejiangChina carbon Neutrality and Climate Change Thrust Society HubThe Hong Kong University of Science and Technology(Guangzhou)Guangzhou 511453GuangdongChina

Graphene has enormous potential to capture CO_(2)due to its unique properties and ***,graphene-based adsorbents have drawbacks of lower CO_(2)adsorption capacity and poor *** work demonstrates a one-step rapid and sustainable N_(2)/H_(2)plasma treatment process to prepare graphene-based sorbent material with enhanced CO_(2)adsorption *** treatment directly enriches amine species,increases surface area,and improves textural *** CO_(2)adsorption capacity increases from 1.6 to 3.3 mmol/g for capturing flue gas,and from 0.14 to 1.3 mmol/g for direct air capture (DAC).Importantly,the electrothermal property of the plasma-modified aerogels has been significantly improved,resulting in faster heating rates and significantly reducing energy consumption compared to conventional external heating for regeneration of *** aerogels display improved selectivity of 42 and 87 after plasma modification for 5 and 10 min,*** plasma-treated aerogels display minimal loss between 17%and 19% in capacity after 40 adsorption/desorption cycles,rendering excellent *** N_(2)/H_(2)plasma treatment of adsorbent materials would lower energy expenses and prevent negative effects on the global economy caused by climate change.

关键词： carbon neutrality CO_(2)capture Climate change Plasma treatment Graphene aerogel

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Additives enhancing supported amines performance in CO_(2)capture fromair

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SusMat 2023年第3期3卷 416-430页

作者： Yaozu Wang Yihe Miao Bingyao Ge Zhijun He Xuancan Zhu Shanke Liu Jia Li Lijun Yu College of Smart Energy Shanghai Jiao Tong UniversityShanghaiChina China-UK low carbon College Shanghai Jiao Tong UniversityShanghaiChina Research Center of Solar Power&Refrigeration School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghaiChina carbon Neutrality and Climate Change Thrust Society HubThe Hong Kong University of Science and Technology(Guangzhou)Nansha

The utilization of supported amines as adsorbents in direct air capture(DAC)has been demonstrated to be a promising strategy for the reduction of CO_(2)*** improve the performance of amine-based adsorbents,the incorporation of additives has been widely *** the present study,we conduct a comprehensive comparison of seven additives on tetraethylenepentamine-impregnated mesoporous silica as a representative amine-based *** results indicate thatminor molecularweight additiveswith hydroxyl groups show improved adsorption-desorption performance and increase oxidative stability.A proposed mechanism for these improvements is the combined physical and chemical promotion effects of hydroxyl *** a comprehensive review of existing literature,it is found that the effects of additives on amine-based adsorbents are dependent on factors,such as additive type,pristine adsorbent properties,incorporation method,and testing *** on these findings,it is recommended that future DAC systems prioritize the use of hydroxyl-containing additives,whereas higher CO_(2)concentration and temperature capture may benefit from the incorporation of additives without hydroxyl *** conclusions are expected to contribute to the design of efficient adsorbents for CO_(2)capture.

关键词： additives direct air capture hydroxyl groups supported amine adsorbents tetraethylenepentamine

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Stall Evolution Mechanism of a Centrifugal Compressor with a Wide-Long Vaneless Diffuser

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Journal of Thermal Science 2024年第3期33卷 899-913页

作者： ZHANG Lei KANG Jiacheng LANG Jinhua AN Guangyao ZHANG Qian WANG Longyao WANG Qifang Department of Power Engineering North China Electric Power UniversityBaoding071003China Hebei Key Laboratory of low carbon and High Efficiency Power Generation Technology North China Electric Power UniversityBaoding071003China

The rotating stall mechanism is of high importance for the stability of centrifugal compressors and thermal power *** majority of research concerning this topic has concentrated on the initial stall ***,the evolution of stall cells in wide-long diffusers has not been comprehensively *** this paper,the causes of rotating stall in the wide-long diffuser and the three-dimensional evolution mechanism of stall cells during the stall process were thoroughly *** the stall induction phase,an annulus vortex structure was found in the reverse-flow zone near the hub side of the diffuser outlet,which was the initial form of stall *** whole evolution process of stall cells was divided into three phases as the flow rate *** the initial stall phase,the dynamic equilibrium was built under effects of the impeller wake and the adverse pressure *** a result,the number of stall cells was kept at seven and the size of stall cells remained *** the transition phase,the flow in the diffuser became *** cells extended to the impeller outlet,and the effect of the wake flow was strengthened *** cells started integrating and separating *** a result,the number and propagation speed of stall cells varied periodically at a constant mass flow *** the deep stall phase,the size of stall cells remained unchanged,and the number of stall cells kept at *** study has important practical guidance and engineering value for the high-efficiency design and safe operation of centrifugal compressors.

关键词： centrifugal compressor wide-long vaneless diffuser stall evolution mechanism wake flow

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Power system decarbonisation with Global Energy Interconnection——a case study on the economic viability of international transmission network in Australasia

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Global Energy Interconnection 2018年第4期1卷 507-519页

作者： Changlong Wang Roger Dargaville Matthew Jeppesen The Energy Transition hub

The electric energy system in Indonesia is undergoing with the challenges of fast-increasing electricity demand,carbon constraints,and rising *** our model of the Australian and Indonesian electrical grids(either separately or interconnected)that incorporates operational flexibility in capacity expansion planning,we first show that meeting the projected demand for Java and Bali—the main Indonesian grid,with 100%locally integrated renewables by 2050 would be ***,a submarine high-voltage DC(HVDC)link connecting Indonesia’s Java-Bali power grid to the Australian National Electricity Market(NEM)grid through the Northern Territory would help alleviate this situation,given Australia’s abundant renewable energy ***,our model reveals that the Australian NEM could also profit from additional renewables if connected to the Northern Territory through a ground HVDC transmission line to gather intermittent wind and solar generation,which would be curtailed otherwise if unused by Indonesia through the submarine *** the expensiveness of long HVDC links,the wholesale electricity cost of the integrated 100%renewable Australasia power system could be reduced by over 16%,from$AUD177/MWh with only local renewables to$AUD148/MWh with integrated HVDC *** model retrieved the optimal international HVDC link with capacity of 43.8 GW,and the optimal regional HVDC transmission line with a capacity of 5.5 *** the best of our knowledge,this is the first detailed model on power system decarbonisation planning for both Australian NEM and Indonesian Java-Bali power grid considering HVDC interconnections.

关键词： Decarbonisation Climate change mitigation HVDC Grid interconnection

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Exploring Marine Cloud Brightening with a Reduced Complexity Model

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Journal of Meteorological Research 2024年第6期38卷 1093-1104页

作者： Muhammad Mueed KHAN Christopher RUNYAN Shahzad BASHIR Abdul Basit AMJAD Department of Mechanical Engineering Carnegie Mellon UniversityPittsburghPA 15213USA Department of Mechanical&Mechatronics Engineering University of WaterlooON N2L 3G1Canada low carbon hub SSE ThermalLeeds LS158GBUnited Kingdom

Throughout the industrial period,anthropogenic aerosols have likely offset approximately one-third of the warming caused by greenhouse *** cloud brightening aims to capitalize on one aspect of this phenomenon to potentially mitigate global warming by enhancing cloud reflectivity through adjustments in cloud droplet *** study employs a simplified yet comprehensive modeling framework,integrating an open-source parcel model for aerosol activation,a radiation transport model based on commercial computational fluid dynamics code,and assimilated meteorological *** reduced complexity model addresses the challenges of rapid radiation transfer calculations while managing uncertainties in aerosol–cloud-radiation(ACR)*** using an uncoupled ACR mechanism and omitting feedback between clouds and aerosols,our results closely align with observations,validating the robustness of our assumptions and *** demonstrates that even simplified models,supported by parcel modeling and observational constraints,can achieve accurate radiation transfer calculations comparable to advanced climate *** analyze how variations in droplets size and concentration affect cloud albedo for geoengineering *** droplet sizes,typically within the 20–35-µm range,significantly increase cloud albedo by approximately 28%–57%across our test *** find that droplets transmit about 29%more solar radiation than *** albedo changes require injection concentrations exceeding background levels by around 30%,diminishing as concentrations approach ambient *** must also be given to the spray pattern of droplet injections,as effective deployment can influence cloud thickness and subsequently impact cloud *** research provides insights into the feasibility and effectiveness of using a reduced complexity model for marine cloud brightening with frontal cyclone and stratus cumulus clouds,and emphasi

关键词： radiation transfer model climate change mitigation aerosol-cloud interactions geo-engineering marine cloud brightening Twomey effect

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Revolution in thermoelectric cooling using PbSe thermoelectrics by grid plainification

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Science China Materials 2024年第5期67卷 1672-1673页

作者： Xiao-Lei Shi Qingfeng Liu Zhi-Gang Chen School of Chemistry and Physics ARC Research Hub in Zero-emission Power Generation for Carbon Neutralityand Centre for Materials ScienceQueensland University of TechnologyBrisbaneQueensland4000Australia State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing211816China

Thermoelectric materials and devices enable direct conversion between heat and electricity,holding potential applications in thermoelectric power generation,localized cooling,and electronic thermal management[1].Howev... 详细信息

关键词： enable thermoelectric constrained

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A Review of Technical Advances,Barriers,and Solutions in the Power to Hydrogen(P2H)Roadmap

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Engineering 2020年第12期6卷 1364-1380页

作者： Guoping Hu Chao Chen Hiep Thuan Lu Yue Wu Congmin Liu Lefu Tao Yuhan Men Guangli He Kevin Gang Li Department of Chemical Engineering The University of MelbourneParkvilleVIC 3010Australia Department of Engineering Science University of OxfordOxford OX13PJUnited Kingdom Australian Research Council(ARC)Research hub for Medicinal Agriculture Department of AnimalPlant and Soil SciencesLa Trobe UniversityBundooraVIC 3086Australia National Institute of Clean-and-low-carbon Energy Beijing 102211China Fluid Science and Resources Division Department of Chemical EngineeringThe University of Western AustraliaCrawleyWA 6009Australia

Power to hydrogen(P2H)provides a promising solution to the geographic mismatch between sources of renewable energy and the market,due to its technological maturity,flexibility,and the availability of technical and economic data from a range of active demonstration *** this review,we aim to provide an overview of the status of P2H,analyze its technical barriers and solutions,and propose potential opportunities for future research and industrial *** specifically focus on the transport of hydrogen via natural gas pipeline networks and end-user *** evidence shows that an addition of about 10%hydrogen into natural gas pipelines has negligible effects on the pipelines and utilization appliances,and may therefore extend the asset value of the pipelines after natural gas is *** obtain pure hydrogen from hydrogen-enriched natural gas(HENG)mixtures,end-user separation is inevitable,and can be achieved through membranes,adsorption,and other promising separation ***,novel materials with high selectivity and capacity will be the key to the development of industrial processes,and an integrated membrane-adsorption process may be considered in order to produce high-purity hydrogen from *** is also worth investigating the feasibility of electrochemical separation(hydrogen pumping)at a large scale and its energy *** may only be feasible when liquefied natural gas(LNG)is one of the major products.A range of other technological and operational barriers and opportunities,such as water availability,byproduct(oxygen)utilization,and environmental impacts,are also *** review will advance readers’understanding of P2H and foster the development of the hydrogen economy.

关键词： Power to hydrogen Renewables Hydrogen Energy

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U.S. Departure from Paris Agreement Cannot Stop low-carbon Trend

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China Today 2017年第7期66卷 38-40页

作者： LI RUIXIN Greenovation hub

ON June 1, 2017 U.S. President Donald Trump announced, at the Rose Garden that the U.S. would be getting out" of the Paris Agreement. The decision was unanimously denounced. UN Secretary-General Antonio Guterres called it "a major disappointment for global efforts to reduce greenhouse gas emissions and promote in- ternational security."

关键词： Departure from Paris Agreement Cannot Stop low-carbon Trend U.S UNFCCC

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Single-atom Pt on carbon nanotubes for selective electrocatalysis

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carbon Energy 2024年第1期6卷 63-71页

作者： Samuel S.Hardisty Xiaoqian Lin Anthony R.J.Kucernak David Zitoun Department of Chemistry Bar Ilan Institute of Nanotechnology and Advanced Materials(BINA)Bar Ilan UniversityRamat GanIsrael Department of Chemistry Molecular Science Research HubImperial College LondonLondonUK

Utilizing supported single atoms as catalysts presents an opportunity to reduce the usage of critical raw materials such as platinum,which are essential for electrochemical reactions such as hydrogen oxidation reaction(HOR).Herein,we describe the synthesis of a Pt single electrocatalyst inside single-walled carbon nanotubes(SWCNTs)via a redox *** via electron microscopy,X-ray photoelectron microscopy,and X-ray absorption spectroscopy show the single-atom nature of the *** electrochemical behavior of the sample to hydrogen and oxygen was investigated using the advanced floating electrode technique,which minimizes mass transport limitations and gives a thorough insight into the activity of the *** single-atom samples showed higher HOR activity than state-of-the-art 30%Pt/C while almost no oxygen reduction reaction activity in the proton exchange membrane fuel cell operating *** selective activity toward HOR arose as the main fingerprint of the catalyst confinement in the SWCNTs.

关键词： confinement electrocatalysis hydrogen platinum single atom catalysts

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Weavable thermoelectrics: advances, controversies, and future developments

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Materials Futures 2024年第1期3卷 63-94页

作者： Xiao-Lei Shi Shuai Sun Ting Wu Jian Tu Zhiming Zhou Qingfeng Liu Zhi-Gang Chen School of Chemistry and Physics ARC Research Hub in Zero-emission Power Generation for Carbon Neutralityand Centre for Materials ScienceQueensland University of TechnologyBrisbaneQueensland4000Australia State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 211800People’s Republic of China School of Materials Science and Engineering Chongqing University of TechnologyChongqing 400054People’s Republic of China

Owing to the capability of the conversion between thermal energy and electrical energy and their advantages of light weight,compactness,noise-free operation,and precision reliability,wearable thermoelectrics show great potential for diverse *** them,weavable thermoelectrics,a subclass with inherent flexibility,wearability,and operability,find utility in harnessing waste heat from irregular heat *** the rapid advancements in this field,a timely review is essential to consolidate the progress and ***,we provide an overview of the state of weavable thermoelectric materials and devices in wearable smart textiles,encompassing mechanisms,materials,fabrications,device structures,and applications from recent advancements,challenges,and *** review can serve as a valuable reference for researchers in the field of flexible wearable thermoelectric materials and devices and their applications.

关键词： thermoelectric weaving materials structure device

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