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| 1 | Carbonation of calcium-containing mineral and industrial by-products显示文摘The use of carbon dioxide(CO_(2))and calciumcontaining by-products from industrial activities is receiving increasing interest as a route to valuable carbonate materials while reducing CO_(2) emissions and saving natural resources.In this work,wet-chemical experimental data was assessed,which involved the carbonation of three types of materials in aqueous solutions,namely,1)wollastonite,a calcium silicate mineral,2)steelmaking slag,a by-product of steel production,and 3)paper bottom ash(PBA)from waste paper incineration.Aims were to achieve either a high carbonation degree and/or a pure carbonate product with potential commercial value.Producing a pure precipitated calcium carbonate(PCC)material that may find use in paper industry products puts strong requirements on purity and brightness.The parameters investigated were particle size,CO_(2)pressure,temperature,solid/liquid ratio,and the use of additives that affect the solubilities of CO_(2)and/or calcium carbonate.Temperatures and pressures were varied up to 180℃and 4 MPa.Data obtained with the wollastinite mineral allowed for a comparison between natural resources and the industrial by-product materials,the latter typically being more reactive.With respect to temperature and pressure trends reported by others were largely confirmed,with temperatures above 150℃introducing thermodynamic limitations depending on CO_(2)pressure.The influence of additives showed some promise,although costs may make recycling and reuse of additives a necessity for a largescale process.When using steelmaking slag,magnetic separation may remove some iron-containing material from the process(although this is far from perfect),while the addition of bicarbonate supported the removal of phosphorous,aside from improving calcium extraction.The experiments with paper bottom ash(PBA)gave new data,showing that its reactivity resembles that of steelmaking slag,while its composition results in relatively pure carbonate product.Also,with PBA no additives were needed to achieve this. | Ron ZEVENHOVEN Anders WIKLUND Johan FAGERLUND Sanni ELONEVA Ben IN’T VEEN Hans GEERLINGS Gert VAN MOSSEL Harold BOERRIGTER | 2010 | Frontiers of Chemical Science and Engineering2010，4，2： | 2 |
| 2 | Sulfuric acid leaching kinetics of South African chromite显示文摘The sulfuric acid leaching kinetics of South African chromite was investigated. The negative influence of a solid product layer constituted of a silicon-rich phase and chromium-rich sulfate was eliminated by crushing the chromite and by selecting proper leaching conditions. The dimensionless change in specific surface area and the conversion rate of the chromite were observed to exhibit a proportional relationship. A modified shrinking particle model was developed to account for the change in reactive surface area, and the model was fitted to experimental data. The resulting model was observed to describe experimental findings very well. Kinetics analysis revealed that the leaching process is controlled by a chemical reaction under the employed experimental conditions and the activation energy of the reaction is 48 kJ ·mol–1. | Qing Zhao Cheng-jun Liu Pei-yang Shi Bo Zhang Mao-fa Jiang Qing-song Zhang Ron Zevenhoven Henrik Saxén | 2015 | International Journal of Minerals,Metallurgy and Materials2015，22，3： | 2 |
| 3 | Production of precipitated calcium carbonate from calcium silicates and carbon dioxide显示文摘 | Sebastian Teir Sanni Eloneva Ron Zevenhoven | 2005 | Energy Conversion and Management2005，46，1819： | 1 |
| 4 | Sulfur Dioxide Capture under PFBC conditions:the influence of sorbent particle structure显示文摘 | Ron Zevenhoven etc | 1998 | Fuel1998，77，4： | 1 |
| 5 | Production of precipitated calcium carbonate from calcium silicates and carbon dioxide显示文摘 | Sebastian Teir Sanni Eloneva Ron Zevenhoven | 2005 | Energy Conversion and Management2005，46，： | 1 |
| 6 | Surfur dioxide capture under PFBC conditions:the influence of sorbent particle structure 显示文摘 | Ron Zevenhoven Patrik Yrjas Mikko Hupa | 1998 | Fuel1998，77，4： | 1 |
| 7 | Carbonation of magnesium silicate mineral using a pressurised gas/solid process显示文摘 | Johan Fagerlund Sebastian Teir Experience Nduagu Ron Zevenhoven | 2009 | Energy Procedia2009，，1： | 1 |
| 8 | Dissolution of steelmaking slags in acetic acid for precipitated calcium carbonate production显示文摘 | Sebastian Teir Sanni Eloneva Carl-Johan Fogelholm Ron Zevenhoven | 2006 | Energy2006，，4： | 1 |
| 9 | Production of precipitated calcium carbonate from calcium silicates and carbon dioxide显示文摘 | Sebastian Teir Sanni Eloneva Ron Zevenhoven | 2005 | Energy Conversion and Management2005，，18： | 1 |
| 10 | Mercury in waste in the European Union:sources,disposal methods and risks,Resources显示文摘 | Arun B Mukherjee Ron Zevenhoven Jens Brodersen | 2004 | Conservation and Recycling2004，，42： | 1 |
| 11 | Black liquor devolatilization and swelling-a detailed droplet model and experimental validation 显示文摘 | Mika J?rvinen Ron Zevenhoven Esa Vakkilainen | 2003 | Biomass and Bioenergy2003，24，： | 1 |
| 12 | A stepwise process for carbon dioxide sequestration using magnesium silicates显示文摘This work involves the production of magnesium in the form of Mg(OH)_(2)from serpentinite rock(nickel mine tailing)material followed by conversion into MgCO_(3)using a pressurised fluidised bed(PFB)reactor operating at 400℃-600℃and pressures up to 2.85 MPa.Our approach is rooted in the thermodynamic fact that the reaction between Mg(OH)_(2)and gaseous CO_(2)forming MgCO_(3)and water releases significant amounts of heat.The main problem is,however,the chemical kinetics;the reaction is slow and has to be accelerated in order to be used in an economically viable process for large-scale(~1 Mt/a)CO_(2)sequestration.We have constructed a labscale PFB reactor test-setup for optimising the carbonation reaction.At high enough temperatures and conversion levels the reaction should provide the heat for the proceeding Mg(OH)_(2)production step,making the overall process energy neutral.So far we have been able to achieve a conversion degree of 26%at 500℃and 2.85 MPa after 30 min(particle size 125-212μm).In this paper the test facility and our latest results and progress on CO_(2)mineral carbonation are summarised.Also,the possible integration of the iron as a feedstock for iron and steel production will be briefly addressed.An interesting side-effect of this carbon dioxide capture and storage(CCS)route is that significant amounts of iron are obtained from the serpentinite rock material.This is released during the Mg(OH)_(2)production and can be of great interest to the iron-and steel producing sector,which at the same time is Finland’s largest CO_(2)producer. | Johan FAGERLUND Experience NDUAGU Inês ROMÃO Ron ZEVENHOVEN | 2010 | Frontiers of Chemical Science and Engineering2010，4，2： | 1 |
| 13 | Effect of Ca/Mg molar ratio on the calcium-based sorbents显示文摘Steelmaking industry faces urgent demands for both steel slag utilization and CO_(2)abatement.Ca and Mg of steel slag can be extracted by acid solution and used to prepare sorbents for CO_(2)capture.In this work,the calcium-based sorbents were prepared from stainless steel slag leachate by co-precipitation,and the initial CO_(2)chemisorption capacity of the calcium-based sorbent prepared from steel slag with the Ca and Mg molar ratio of 3.64:1 was 0.40 g/g.Moreover,the effect of Ca/Mg molar ratio on the morphology,structure,and CO_(2)chemisorption capacity of the calcium-based sorbents were investigated.The results show that the optimal Ca/Mg molar ratio of sorbent for CO_(2)capture was4.2:1,and the skeleton support effect of MgO in calcium-based sorbents was determined.Meanwhile,the chemisorption kinetics of the sorbents was studied using the Avrami-Erofeev model.There were two processes of CO_(2)chemisorption,and the activation energy of the first stage(reaction control)was found to be lower than that of the second stage(diffusion control). | Yumeng Li Qing Zhao Xiaohui Mei Chengjun Liu Henrik Saxén Ron Zevenhoven | 2023 | International Journal of Minerals,Metallurgy and Materials2023，30，11： | 1 |
| 14 | Assessing the energy efficiency of a jaw sher显示文摘 | Daniel Legendre Ron Zevenhoven | 2014 | Energy2014，74，： | 1 |
| 15 | Emissions from Large-Scale Medium-Speed Diesel engines:Influence of Fuel Type and Operating Mode 显示文摘 | Arto Sarvi Fogelholm Carl-Johan Ron Zevenhoven | 2008 | Fuel2008，89，： | 1 |
| 16 | Mercury flow via coal and coal utilization by-products: A global perspective显示文摘 | Arun B. Mukherjee Ron Zevenhoven Prosun Bhattacharya Kenneth S. Sajwan Ryunosuke Kikuchi | 2007 | Resources, Conservation & Recycling2007，，4： | 1 |
| 17 | Production of precipitated calcium carbonate from calcium silicates and carbon dioxide显示文摘 | Sebastian Teir Sanni Eloneva Ron Zevenhoven | 2005 | Energy Conversion and Management2005，，18： | 1 |
| 18 | Chemical fixation of CO2 in carbonates: Routes to valuable products and long-term storage 显示文摘 | Ron Zevenhoven Sanni Eloneva Sebastian Teir | 2006 | Catalysis Today2006，115，： | 1 |
| 19 | Production of precipitated calcium carbonate from calcium silicates and carbon dioxide 显示文摘 | Sebastian Teir Sanni Eloneva Ron Zevenhoven | 2005 | Energy Conversion and Management2005，46，： | 1 |
| 20 | Mercury in waste in the European Union: Sources, disposal methods and risks显示文摘 | Arun B Mukherjee Ron Zevenhoven Jnes Brodersen | 2004 | Resources Conservation & Recycling2004，42，： | 1 |
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