For Finland, carbon dioxide mineralisation was identified as the only option for CCS （carbon capture and storage） application. Unfortunately it has not been embraced by the power sector. One interesting source-sink ...For Finland, carbon dioxide mineralisation was identified as the only option for CCS （carbon capture and storage） application. Unfortunately it has not been embraced by the power sector. One interesting source-sink combination, however, is formed by magnesium silicate resources at Vammala, located -85 km east of the 565 MWe coal-fired Meri-Pori Power Plant on the country＇s southwest coast. This paper assesses mineral sequestration of Meri-Pori power plant CO2, using Vammala mineral resources and the mineralisation process under development at Abo Akademi University. That process implies Mg（OH）E production from magnesium silicate-based rock, followed by gas/solid carbonation of the Mg（OH）2 in a pressurised fluidised bed. Reported are results on experimental work, i.e., Mg（OH）2 production, with rock from locations close to Meri-Pori. Results suggest a total CO2 fixation capacity -50 Mt CO2 for the Vammala site, although production of Mg（OH）2 from rock from the site is challenging. Finally, as mineralisation could be directly applied to flue gases without CO2 pre-capture, we report from experimental work on carbonation of Mg（OH）2 with CO2 and CO2-SO2-O2 gas mixtures. Results show that SO2 readily reacts with Mg（OH）2, providing an opportunity to simultaneously capture SO2 and CO2, which could make separate flue gas desulphurisation redundant.展开更多
针对燃煤电厂脱硫废水成分复杂、处理成本高等问题,该研究采用改进的摇椅式电容去离子技术对脱硫废水分盐与浓缩进行了实验研究。实验考察了电压、进水流量和离子浓度等参数对除盐效率和SO_(4)^(2-)分离效果的影响,同时分析了系统能耗...针对燃煤电厂脱硫废水成分复杂、处理成本高等问题,该研究采用改进的摇椅式电容去离子技术对脱硫废水分盐与浓缩进行了实验研究。实验考察了电压、进水流量和离子浓度等参数对除盐效率和SO_(4)^(2-)分离效果的影响,同时分析了系统能耗。结果表明,在电压为2 V,进水流量为46 m L·min^(-1),进水电导率为29500μS·cm^(-1)的条件下,RCDI系统的处理效果最佳,105 min时除盐率为77.19%,单位除盐量能耗为0.853 k Wh·kg^(-1)。SO_(4)^(2-)保留率稳定在90%以上,操作条件的改变对SO_(4)^(2-)分离效果的影响较小。改进后的RCDI系统通过增加极水通道和采用单价选择性阴离子交换膜,使SO42-被有效的阻隔在原水中,而Ca^(2+)、Mg^(2+)、Cl^(-)则顺利迁移并被浓缩,实现了同步分盐和浓缩的连续不间断运行,极大简化了操作流程,提升了系统的运行效率和稳定性。展开更多
通过土柱淋洗试验的方法,研究了脱硫副产物在改良碱性土壤过程中对碱性土壤化学指标(代换性钠、ESP、SAR、pH值)的影响。本研究采用两种碱性土壤(强度碱化土和碱土),两种土壤各分两个脱硫副产物施用水平(强度碱化土为3 g kg-1和3 6 g kg...通过土柱淋洗试验的方法,研究了脱硫副产物在改良碱性土壤过程中对碱性土壤化学指标(代换性钠、ESP、SAR、pH值)的影响。本研究采用两种碱性土壤(强度碱化土和碱土),两种土壤各分两个脱硫副产物施用水平(强度碱化土为3 g kg-1和3 6 g kg-1;碱土为7 g kg-1和8 4 g kg-1)。结果表明,经过施加烟气脱硫副产物和淋洗各种试验处理的代换性钠、ESP、SAR和pH值都有了明显的降低,碱性土壤得到了改良;同时,高烟气脱硫副产物施加水平的碱性土壤改良效果要优于低施加水平的碱性土壤;强度碱化土和碱土分别施加3 6 g kg-1、8 4 g kg-1烟气脱硫副产物后,在强度碱化土表层(0~40 cm)和碱土表层(0~20 cm)ESP<15、SAR<13和pH<8 5,已经降至中度碱化土水平,改良效果显著。展开更多
Percolation theory is improved and applied to analyze the catalytic effect of NaCl addi-tive on desu1phtirisation with limestones under the Fluidized Bed(FB) conditions. The autherproposed that NaCl not only enlarges ...Percolation theory is improved and applied to analyze the catalytic effect of NaCl addi-tive on desu1phtirisation with limestones under the Fluidized Bed(FB) conditions. The autherproposed that NaCl not only enlarges the average inner pore diameter but also improves thepore connectivity of CaO calcined by limestone, which can be proved by the changing ofBethe network coordination number(Z) from 6 without NaCl to 7.8 when NaCl is presentwith a content of 1.95 wt%.展开更多
文摘For Finland, carbon dioxide mineralisation was identified as the only option for CCS （carbon capture and storage） application. Unfortunately it has not been embraced by the power sector. One interesting source-sink combination, however, is formed by magnesium silicate resources at Vammala, located -85 km east of the 565 MWe coal-fired Meri-Pori Power Plant on the country＇s southwest coast. This paper assesses mineral sequestration of Meri-Pori power plant CO2, using Vammala mineral resources and the mineralisation process under development at Abo Akademi University. That process implies Mg（OH）E production from magnesium silicate-based rock, followed by gas/solid carbonation of the Mg（OH）2 in a pressurised fluidised bed. Reported are results on experimental work, i.e., Mg（OH）2 production, with rock from locations close to Meri-Pori. Results suggest a total CO2 fixation capacity -50 Mt CO2 for the Vammala site, although production of Mg（OH）2 from rock from the site is challenging. Finally, as mineralisation could be directly applied to flue gases without CO2 pre-capture, we report from experimental work on carbonation of Mg（OH）2 with CO2 and CO2-SO2-O2 gas mixtures. Results show that SO2 readily reacts with Mg（OH）2, providing an opportunity to simultaneously capture SO2 and CO2, which could make separate flue gas desulphurisation redundant.
文摘针对燃煤电厂脱硫废水成分复杂、处理成本高等问题,该研究采用改进的摇椅式电容去离子技术对脱硫废水分盐与浓缩进行了实验研究。实验考察了电压、进水流量和离子浓度等参数对除盐效率和SO_(4)^(2-)分离效果的影响,同时分析了系统能耗。结果表明,在电压为2 V,进水流量为46 m L·min^(-1),进水电导率为29500μS·cm^(-1)的条件下,RCDI系统的处理效果最佳,105 min时除盐率为77.19%,单位除盐量能耗为0.853 k Wh·kg^(-1)。SO_(4)^(2-)保留率稳定在90%以上,操作条件的改变对SO_(4)^(2-)分离效果的影响较小。改进后的RCDI系统通过增加极水通道和采用单价选择性阴离子交换膜,使SO42-被有效的阻隔在原水中,而Ca^(2+)、Mg^(2+)、Cl^(-)则顺利迁移并被浓缩,实现了同步分盐和浓缩的连续不间断运行,极大简化了操作流程,提升了系统的运行效率和稳定性。
文摘通过土柱淋洗试验的方法,研究了脱硫副产物在改良碱性土壤过程中对碱性土壤化学指标(代换性钠、ESP、SAR、pH值)的影响。本研究采用两种碱性土壤(强度碱化土和碱土),两种土壤各分两个脱硫副产物施用水平(强度碱化土为3 g kg-1和3 6 g kg-1;碱土为7 g kg-1和8 4 g kg-1)。结果表明,经过施加烟气脱硫副产物和淋洗各种试验处理的代换性钠、ESP、SAR和pH值都有了明显的降低,碱性土壤得到了改良;同时,高烟气脱硫副产物施加水平的碱性土壤改良效果要优于低施加水平的碱性土壤;强度碱化土和碱土分别施加3 6 g kg-1、8 4 g kg-1烟气脱硫副产物后,在强度碱化土表层(0~40 cm)和碱土表层(0~20 cm)ESP<15、SAR<13和pH<8 5,已经降至中度碱化土水平,改良效果显著。
文摘Percolation theory is improved and applied to analyze the catalytic effect of NaCl addi-tive on desu1phtirisation with limestones under the Fluidized Bed(FB) conditions. The autherproposed that NaCl not only enlarges the average inner pore diameter but also improves thepore connectivity of CaO calcined by limestone, which can be proved by the changing ofBethe network coordination number(Z) from 6 without NaCl to 7.8 when NaCl is presentwith a content of 1.95 wt%.
