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溶剂萃取法脱除褐煤中含氧化合物的工艺研究
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作者 汪爱国 栾海燕 +1 位作者 张谦 陈福明 《煤炭科学技术》 CAS 北大核心 2013年第11期113-115,119,共4页
为脱除褐煤中的含氧化合物,提高褐煤综合利用价值,采用碱溶液低温萃取与超临界甲醇耦合萃取对褐煤进行深度处理,考察了碱溶液萃取温度、碱液浓度以及溶煤比等因素对含氧化合物的脱除效果。试验结果表明,碱溶液萃取的最优工艺条件为萃取... 为脱除褐煤中的含氧化合物,提高褐煤综合利用价值,采用碱溶液低温萃取与超临界甲醇耦合萃取对褐煤进行深度处理,考察了碱溶液萃取温度、碱液浓度以及溶煤比等因素对含氧化合物的脱除效果。试验结果表明,碱溶液萃取的最优工艺条件为萃取温度180℃,碱液浓度1%,溶煤比6∶1,褐煤中氧脱除率达到32%。采用碱萃取耦合超临界甲醇萃取工艺,褐煤中氧脱除率提高到40%以上,对褐煤中羧基和酚羟基具有很好的脱除效果。 展开更多
关键词 褐煤 化合物 溶剂萃取法 腐植酸 氧脱除率 超临界甲醇
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Response surface optimization of process parameters for removal of F and Cl from zinc oxide fume by microwave roasting 被引量:2
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作者 李志强 李静 +4 位作者 张利波 彭金辉 王仕兴 马爱元 王宝宝 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2015年第3期973-980,共8页
Microwave was applied to roasting the zinc oxide fume obtained from fuming furnace for the removal of F and Cl. The effects of important parameters, such as roasting temperature, holding time and stirring speed, were ... Microwave was applied to roasting the zinc oxide fume obtained from fuming furnace for the removal of F and Cl. The effects of important parameters, such as roasting temperature, holding time and stirring speed, were investigated and the process conditions were optimized using response surface methodology (RSM). The results show that the effects of roasting temperature and holding time on the removal rate of F and Cl are the most significant, and the effect of stirring speed is the second. The defluorination rate reaches 92.6% while the dechlorination rate reaches 90.2%, under the process conditions of roasting temperature of 700 °C, holding time of 80 min and stirring speed of 120 r/min. The results indicate that the removal of F and Cl from fuming furnace production of zinc oxide fumes using microwave roasting process is feasible and reliable. 展开更多
关键词 zinc oxide fume F CL removal rate microwave roasting response surface methodology
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Multi-pollutants simultaneous removal from flue gas
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作者 Gao Xiang Wu Zuliang Luo Zhongyang Ni Mingjiang Cen Kefa 《Engineering Sciences》 EI 2010年第1期27-31,共5页
The multi-stages humidifier semi-dry flue gas cleaning technology, the CRS plasma flue gas cleaning technology and oxidative additive flue gas cleaning technology were investigated for multi-pollutants removal. The se... The multi-stages humidifier semi-dry flue gas cleaning technology, the CRS plasma flue gas cleaning technology and oxidative additive flue gas cleaning technology were investigated for multi-pollutants removal. The semi-dry flue gas cleaning technology using multi-stages humidifier and additive can improve oxidation and absorption, and it can achieve high multi-pollutants removal efficiency. The CRS discharge can produce many OH radicals that promote NO oxidation. Combining NaOH absorption can achieve high deSO2 and deNO, efficiencies. It is fit for the reconstruction of primary wet flue gas desulfurization (WFGD). In addition, using NaClO2 as additive in the absorbent of WFGD can obtain very high removal efficiency of SO2 and NOx. 展开更多
关键词 simultaneous removal SEMI-DRY PLASMA ADDITIVE
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High-efficiency removal of NOx by a novel integrated chemical absorption and two-stage bioreduction process using magnetically stabilized fluidized bed reactors
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作者 Zuoming Zhou Tianming Lin +2 位作者 Guohua Jing Bihong Lv Yixuan Liu 《Science China Chemistry》 SCIE EI CAS CSCD 2015年第10期1621-1630,共10页
To enhance the bioregeneration of Fe(II)EDTA and to avoid the inhibition of the components in nitrogen oxides(NOx) scrubbing solution, a novel integrated process of metal chelate absorption and two-stage bioreduction ... To enhance the bioregeneration of Fe(II)EDTA and to avoid the inhibition of the components in nitrogen oxides(NOx) scrubbing solution, a novel integrated process of metal chelate absorption and two-stage bioreduction was developed. In this process, magnetically stabilized fluidized beds(MSFB) were used as the bioreactors, and the phase diagram for the MSFB operation was determined. Factors including inlet NO, O2 and SO2 concentrations, magnetic field intensity, gas flow rate and liquid circulation rate, were studied experimentally to investigate their effects on NO removal. In addition, a mathematical model for NO removal in this integrated system was developed. The results revealed that the integrated system could be steadily operated with a high NO removal efficiency and elimination capacity, even under the condition of high NO and O2 shock-loading. The established model showed that NO removal efficiency was related to the spray column property and the active Fe(II)EDTA concentration, while the latter depends on the bioregeneration of the disabled absorbent in the MSFB. 展开更多
关键词 nitrogen oxides flue gas immobilized bacteria magnetically stabilized fluidized bed
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