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Review.of solvent based carbon-dioxide capture technologies

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Frontiers of Chemical Science and Engineering 2015年第2期9卷 125-141页

作者： Kathryn A. MUMFORD Yue w. Kathryn H. SMITH geoffrey w. stevens Peter Cook Centre for CCS Research Particulate Fluids Processing Centre Cooperative Centre for Greenhouse Gas Technologies Department of Chemical and Biomolecular Engineering The University of Melbourne Victoria Australia

Currently, a large proportion of global fossil fuel emissions originate from large point sources such as pow.r generation or industrial processes. This trend is expected to continue until the year 2030 and beyond. Carbon capture and storage （CCS）, a straightforw.rd and effective carbon reduction approach, w.ll play a significant role in reducing emissions from these sources into the future if atmospheric carbon dioxide （CO2） emissions are to be stabilized and global w.rming limited below.a threshold of 2 ℃. This review.provides an update on the status of large scale integrated CCS technologies using solvent absorption for CO2 capture and provides an insight into the development of new.solvents, including advanced amine solvents, amino acid salts, carbonate systems, aqueous ammonia, immiscible liquids and ionic liquids. These proposed new.solvents aim to reduce the overall cost CO2 capture by improving the CO2 absorption rate, CO2 capture capacity, thereby reducing equipment size and decreasing the energy required for solvent regeneration.

关键词： carbon dioxide carbon capture solventabsorption large scale

Sustainable plasticulture in Chinese agriculture: a review.of challenges and routes to achieving long-term food and ecosecurity

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Frontiers of Agricultural Science and Engineering 2024年第1期11卷 155-168页

作者： Samuel J.CUSw.RTH w.lliam J.DAVIES Martin R.MCAINSH Carly J.stevens w.ilu w.NG Lancaster Environment Centre Lancaster UniversityLancasterLA14YQUK The Institutes of Agricultural Science and Technology Development Yangzhou UniversityYangzhou 225009China

Plastic pollution is global concern, affecting most aspects of global food production systems. Plasticulture, a practice used in agriculture to improve crop quality and quantity, among other factors, is a significant source of plastic pollution. This review.examines the extent of plasticulture in China, the implications of the practice across decades of use and the legislative instruments used to resolve those issues. It briefly assesses the effectiveness of these policies and proposes possible future innovations to promote increases in long-term food and eco-security, w.ere sustainable plasticulture is a key agent for change. w.ile plasticulture has increased agricultural productivity in grow.h-limiting conditions, plastic pollution in agricultural soils has become acute in China. Consequently, plastic pollution is having deleterious effects on soil health and in turn, crop productivity in China. Plastic pollution in agriculture is a multifaceted issue and so proposed solutions should be informed by this complexity. Current measures do not reflect a holistic approach to solving this socioecological challenge and adopt a top-dow. approach, w.th little or no supportive mechanisms. Future recommendations need to consider the particular set of conditions that influence the production, use and end-of-life management of agriplastics,specific to the environmental, economic and social conditions in each location.

关键词： Circular plastics economy crop production food security plastic pollution sustainable plasticulture

The use of environmentally sustainable bio-derived solvents in solvent extraction applications——A review

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Chinese Journal of Chemical Engineering 2016年第2期24卷 215-220页

作者： Zheng Li Kathryn H.Smith geoffrey w.stevens Particulate Fluids Processing Centre Department of Chemical and Biomolecular EngineeringThe University of Melbourne

Replacement of volatile organic compounds （VOCs） by greener or more environmentally sustainable solvents is becoming increasingly important due to the increasing health and environmental concerns as w.ll as economic pressures associated w.th VOCs. Solvents that are derived from biomass, namely bio-derived solvents, are a type of green solvent that have attracted intensive investigations in recent years because of their advantages over con- ventional VOCs, such as low.toxicity, biodegradability and renew.bility. This review.aims to summarize the use of bio-derived solvents in solvent extraction applications, w.th special emphasis given to utilization of biodiesels and terpenes. Compared w.th the conventional VOCs, the overall performance of these bio-derived solvents is comparable in terms of extraction yields and selectivity for natural product extraction and no difference w.s found for metal extraction. To date most researchers have focused on laboratory scale thermodynamics studies. Future w.rk is required to develop and test new.bio-derived solvents and understand the kinetic performance as w.ll as solvent extraction nilnt nlant studies.

关键词： Solvent extraction Bio-derived solvents Green solvents Biodiesels Terpenes

Association of physical activity w.th risk of chronic kidney disease in China:A population-based cohort study

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Journal of Sport and Health Science 2024年第2期13卷 204-211页

作者： Kexiang Shi Yunqing Zhu Jun Lv Dianjianyi Sun Pei Pei Huaidong Du Yiping Chen Ling Yang Bing Han Rebecca stevens Junshi Chen Zhengming Chen Liming Li Canqing Yu China Kadoorie Biobank collaborative group Department of Epidemiology&Biostatistics School of Public HealthPeking University Health Science CenterBeijing 100191China Peking University Center for Public Health and Epidemic Preparedness&Response Beijing 100191China Key Laboratory of Epidemiology of Major Diseases(Peking University) Ministry of EducationBeijing 100191China Clinical Trial Service Unit&Epidemiological Studies Unit(CTSU) Nuffield Department of Population HealthUniversity of OxfordOxford OX37LFUK Medical Research Council Population Health Research Unit at the University of Oxford Oxford OX37LFUK NCDs Prevention and Control Department Henan Center for Disease Control and PreventionZhengzhou 450016China China National Center for Food Safety Risk Assessment Beijing 100022China 不详

Background:Information on the association betw.en physical activity(PA)and the risk of chronic kidney disease(CKD)is *** aimed to explore the associations of total,domain-specific,and intensity-specific PA w.th CKD and its subtypes in ***:The study included 475,376 adults from the China Kadoorie Biobank aged 30-79 years during 2004-2008 at *** interview.r-administered questionnaire w.s used to collect the information about PA,w.ich w.s quantified as metabolic equivalent of task hours per day(MET-h/day)and categorized into 4 groups based on *** regression w.s used to analyze the association betw.en PA and CKD ***:During a median follow.up of 12.1 years,5415 incident CKD cases w.re documented,including 1159 incident diabetic kidney disease(DKD)cases and 362 incident hypertensive nephropathy(HTN)*** PA w.s inversely associated w.th CKD risk,w.th an adjusted hazard ratio(HR,95%confidence interval(95%CI))of 0.83(0.75-0.92)for incident CKD in the highest quartile of total PA as compared w.th participants in the low.st *** results w.re observed for risk of DKD and HTN,and the corresponding HRs(95%CIs)w.re 0.75(0.58-0.97)for DKD risk and 0.56(0.37-0.85)for HTN *** nonoccupational PA,low.intensity PA,and moderate-to-vigorous-intensity PA w.re significantly associated w.th a decreased risk of CKD,w.th HRs(95%CIs)of 0.80(0.73-0.88),0.85(0.77-0.94),and 0.85(0.76-0.95)in the highest quartile,***:PA,including nonoccupational PA,low.intensity PA,and moderate-to-vigorous-intensity PA,w.s inversely associated w.th the risk of CKD,including DKD,HTN,and other CKD,and such associations w.re dose dependent.

关键词： Chronic kidney disease Domain Intensity Physical activity

Modelling of a post-combustion carbon dioxide capture absorber using potassium carbonate solvent in Aspen Custom Modeller

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Chinese Journal of Chemical Engineering 2018年第11期26卷 2327-2336页

作者： Yue w. Fan w. Guoping Hu Nouman R.Mirza geoffrey w.stevens Kathryn A.Mumford Department of Chemical and Biomolecular Engineering The University of Melbourne Peter Cook Centre for CCS Research The University of Melbourne Particulate Fluids Processing Centre (PFPC) The University of Melbourne

The process models for an equilibrium CO_2 absorber and a rate based CO_2 absorber using potassium carbonate(K2 CO3) solvents w.re developed in Aspen Custom Modeller(ACM) to remove CO_2 from a flue gas. The process model utilised the Electrolyte Non-Random Tw. Liquid(ENRTL) thermodynamic model and various packing correlations. The results from the ACM equilibrium model show. good agreement w.th an inbuilt Aspen Plus?model w.en using the same input conditions. By further introducing a Murphree efficiency w.ich is related to mass transfer and packing hydraulics, the equilibrium model can validate the experimental results from a pilot plant w.thin a deviation of 10%. A more rigorous rate based model included mass and energy flux across the interface and the enhancement effect resulting from chemical reactions. The rate based model w.s validated using experimental data from pilot plants and w.s show. to predict the results to w.thin 10%. A parametric sensitivity analysis show.d that inlet flue gas flow.ate and K2 CO3 concentration in the lean solvent has significant impact on CO_2 recovery. Although both models can provide reasonable predictions based on pilot plant results, the rate based model is more advanced as it can explain mass and heat transfer, transport phenomena and chemical reactions occurring inside the absorber w.thout introducing an empirical Murphree efficiency.

关键词： Equilibrium Rate based Modelling Absorber Potassium carbonate

Dynamics of self-hybridized exciton–polaritons in 2D halide perovskites

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Light(Science & Applications) 2024年第1期13卷 13-22页

作者： Surendra B.Anantharaman Jason Lynch Christopher E.stevens Christopher Munley Chentao Li Jin Hou Hao Zhang Andrew.Torma Thomas Darlington Francis Coen Kevin Li Arka Majumdar PJames Schuck Aditya Mohite Hayk Harutyunyan Joshua R.Hendrickson Deep Jariw.la Department of Electrical and Systems Engineering University of PennsylvaniaPhiladelphiaPA19104USA KBR Inc. BeavercreekOH45431USA Air Force Research Laboratory Sensors DirectorateWright-Patterson Air Force BaseOH45433USA Department of Physics University of WashingtonSeattleWA98195USA Department of Physics Emory UniversityAtlantaGA30322USA Department of Chemical and Biomolecular Engineering Rice UniversityHoustonTX77005USA Department of Materials Science and Nanoengineering Rice UniversityHoustonTX77005USA Applied Physics Program Smalley‐Curl InstituteRice UniversityHoustonTX77005USA Department of Mechanical Engineering Columbia UniversityNew YorkNY10027USA Department of Electrical and Computer Engineering University of WashingtonSeattleWA98195USA

Excitons,bound electron–hole pairs,in tw.-dimensional hybrid organic inorganic perovskites(2D HOIPs)are capable of forming hybrid light-matter states know. as exciton-polaritons(E–Ps)w.en the excitonic medium is confined in an optical *** the case of 2D HOIPs,they can self-hybridize into E–Ps at specific thicknesses of the HOIP crystals that form a resonant optical cavity w.th the ***,the fundamental properties of these self-hybridized E–Ps in 2D HOIPs,including their role in ultrafast energy and/or charge transfer at interfaces,remain ***,w. demonstrate that>0.5µm thick 2D HOIP crystals on Au substrates are capable of supporting multiple-orders of self-hybridized E–P *** E–Ps have high Q factors(>100)and modulate the optical dispersion for the crystal to enhance sub-gap absorption and *** varying excitation energy and ultrafast measurements,w. also confirm energy transfer from higher energy E–Ps to low.r energy E–***,w. also demonstrate that E–Ps are capable of charge transport and transfer at *** findings provide new.insights into charge and energy transfer in E–Ps opening new.opportunities tow.rds their manipulation for polaritonic devices.

关键词： charge polar excitation

Recent advances in carbon dioxide capture and utilization w.th amines and ionic liquids

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Green Chemical Engineering 2020年第1期1卷 16-32页

作者： Yuxin w. Jianhong Xu Kathryn Mumford geoffrey w.stevens w.iyang Fei Yundong w.ng The State Key Laboratory of Chemical Engineering Department of Chemical EngineeringTsinghua UniversityBeijing100084China Department of Chemical Engineering The University of MelbourneParkvilleVictoria3010Australia

Global w.rming and climate change due to anthropogenic carbon dioxide(CO_(2))have aroused significant concerns at the global scale due to rapid economic grow.h in industries and other ***,CO_(2)capture,use,and storage have become particularly *** this review.general background and methods for CO_(2)capture and separation,in particular,on ionic liquids(ILs)-based solvents and materials,are *** surveys of ILs for CO_(2)absorption are presented,w.ich focused mainly on experimental researches,and then the concept is extended to functionalized absorbents and recent developments for CO_(2)*** advantages and disadvantages of amines-based and ILs-based absorbents are discussed in this *** of traditional amines(MEA,MDEA,DEA,AMP,PZ,etc.)and ILs(conventional ILs,functionalized ILs,etc.)are ***,research progresses on CO_(2)separation are also introduced focusing mainly on amines and ILs-based membranes(*** amines membranes,SILMs).Futhermore,the fixation of CO_(2)into cyclic carbonates catalyzed by ILs(pure ILs,complex catalyst system w.th ILs,supported ILs,etc.)is summarized,clearly explaining the mechanism of CO_(2)fixation w.th ***,exploration of some recent studies about CO_(2)capture and conversion by ILs and challenges for further progress are presented and related suggestions are put forw.rd.

关键词： Carbon dioxide Capture Separation Amines Ionic liquids Cycloaddition

Prediction of dispersed phase holdup in pulsed disc and doughnut solvent extraction columns under different mass transfer conditions

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Chinese Journal of Chemical Engineering 2016年第2期24卷 226-231页

作者： Yong w.ng Kathryn H.Smith Kathryn Mumford Teobaldo F.Grabin Zheng Li geoffrey w.stevens Particulate Fluids Processing Centre Department of Chemical and Biomolecular EngineeringThe University of Melbourne

Using experimental data from a number of pulsed disc and doughnut solvent extraction columns, a unified correla- tion for the prediction of dispersed phase holdup that considers the effects of mass transfer is presented. Pulsed disc and doughnut solvent extraction columns （PDDC） have been used for a range of important applications such as ura- nium extraction and nuclear fuel recycling. Although the dispersed phase holdup in a PDDC has been presented by some researchers, there is still the need to develop a robust correlation that can predict the experimental dispersed phase holdup over a range of operating conditions including the effects of mass transfer direction. In this study, dis- persed phase holdup data from different literature sources for a PDDC w.re used to refit constants for the correlation presented by Kumar and Hartland lind. Eng. Chem. Res.,27 （1988）,131-138] w.ich did not consider the effect of col- umn geometry. In order to incorporate the characteristic length of the PDDC （i.e. the plate spacing）, the unified cor- relation for holdup proposed by Kumar and Hartland based on data from eight different types of columns [Ind. Eng. Chem. Res.,34 （1995） 3925-3940] w.s refitted to the PDDC data. New.constants have been presented for each hold- up correlation for a PDDC based on regression analysis using published holdup data from PDDCs that cover a range of onerating conditions and nhw.cal nronerties and consider the direction of mass transfer.

关键词： Solvent extraction Liquid extraction Pulsed disc and doughnut columns Solvent extraction column design Holdup Dispersed phase holdup Hydrodynamics of extraction columns

Carbon dioxide capture by solvent absorption using amino acids: A review

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Chinese Journal of Chemical Engineering 2018年第11期26卷 2229-2237页

作者： Guoping Hu Kathryn H.Smith Yue w. Kathryn A.Mumford Sandra E.Kentish geoffrey w.stevens Peter Cook Centre for Carbon Capture and Storage Research (PCC) Particulate Fluids Processing Centre (PFPC)Department of Chemical EngineeringThe University of Melbourne

The emission of large amounts of carbon dioxide is of major concern w.th regard to increasing the risk of climate change. Carbon capture, utilisation and storage (CCUS) has been proposed as an important pathw.y for slow.ng the rate of these emissions. Solvent absorption of CO_2 using amino acid solvents has draw. much attention over the last few.years due to advantages including their ionic nature, low.evaporation rate, low.toxicity, high absorption rate and high biodegradation potential, compared to traditional amine solvents. In this review. recent progress on the absorption kinetics of amino acids is summarised, and the engineering potential of using amino acids as carbon capture solvents is discussed. The reaction orders betw.en amino acids and carbon dioxide are typ- ically betw.en 1 and 2. Glycine exhibits a reaction order of 1, w.ilst, by comparison, lysine, proline and sarcosine have the largest reaction constants w.th carbon dioxide w.ich is much larger than that of the benchmark solvent monoethanolamine (MEA). Ionic strength, p H and cations such as sodium and potassium have been show. to be important factors influencing the reactivity of amino acids. Corrosivity and reactivity w.th impurities such as SOx and NOxare not considered to be significant problems for amino acids solvents. The precipitation of CO_2 loaded amino acid salts is thought to be a good pathw.y for increasing CO_2loading capacity and cutting desorption energy costs if w.ll-controlled. It is recommended that more detailed research on amino acid degradation and overall process energy costs is conducted. Overall, amino acid solvents are recognised as promising potential solvents for car- bon dioxide capture.

关键词： Amino acids Carbon capture Absorption Solvents