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Preliminary study on washability and composition analysis of high- sulfur coal in some mining areas in Guizhou
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作者 QIU Yue-qin MAO Song +2 位作者 ZHANG Qin TIAN Ye LIU Zhi-hong 《Journal of Coal Science & Engineering(China)》 2011年第1期93-95,共3页
Preliminary sink-float experiments on high-sulfur coal was done in some mining areas and carried on elementary analysis, industrial analysis, and ashcontent analysis. Through the experiments, definite middlings, and g... Preliminary sink-float experiments on high-sulfur coal was done in some mining areas and carried on elementary analysis, industrial analysis, and ashcontent analysis. Through the experiments, definite middlings, and gangue, the phase analysis of sulfur was carried on, by which a good understanding of sulfur characters in raw coal was achieved. 展开更多
关键词 High-sulfur coal sink-float experiments composition analysis sulfur phase analysis
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SELECTIVE SULFUR DIOXIDE DETERMINATION BY GAS DIFFUSION FLOW INJECTION ANALYSIS WITH CHEMILUMINESCENT DETECTION
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作者 Yong He BAO Qi Jun SONG Department of Chemistry,XingJiang University,Urumchi,830046 《Chinese Chemical Letters》 SCIE CAS CSCD 1991年第4期313-314,共2页
Sulfur dioxide has been found to decrease the chemiluminescence of luminol-iodine system.A new determination method for sulfur dioxide in atmosphere is developed by applying this reaction to a flow injection gas diffu... Sulfur dioxide has been found to decrease the chemiluminescence of luminol-iodine system.A new determination method for sulfur dioxide in atmosphere is developed by applying this reaction to a flow injection gas diffusion separation system.This permits the determination of sulfur dioxide selectively and rapidly. 展开更多
关键词 FLOW SELECTIVE sulfur DIOXIDE DETERMINATION BY GAS DIFFUSION FLOW INJECTION analysis WITH CHEMILUMINESCENT DETECTION GAS
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Sulfur poisoning mechanism of three way catalytic converter and its grey relational analysis
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作者 蔡皓 刘亚飞 +3 位作者 龚金科 鄂加强 耿玉鹤 余立平 《Journal of Central South University》 SCIE EI CAS 2014年第11期4091-4096,共6页
Combining a detailed catalytic surface reaction mechanism with noble metal and promoter elementary reactions, a new three-way catalytic converter(TWC) reaction mechanism is established. Based on the new mechanism, ste... Combining a detailed catalytic surface reaction mechanism with noble metal and promoter elementary reactions, a new three-way catalytic converter(TWC) reaction mechanism is established. Based on the new mechanism, steady condition numerical simulation is carried out, and the change of light-off temperatures and conversion efficiency with various SO2 contents is obtained. By grey relational analysis(GRA), the relational grade between conversion efficiency and SO2 content is obtained. And, the result shows that SO2 content has the most important influence on C3H6 and NOX conversion efficiency. This provides an important reference to the improvement of activity design of TWC, and may provide guidance for the condition design and optimization of TWC. 展开更多
关键词 sulfur poisoning three-way catalytic converter reaction mechanism numerical simulation grey relational analysis
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Sulfur Flow Analysis for New Generation Steel Manufacturing Process 被引量:5
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作者 HU Chang-qing ZHANG Chun-xia +1 位作者 HAN Xiao-wei YIN Rui-yu 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2008年第4期12-15,37,共5页
Sulfur flow for new generation steel manufacturing process is analyzed by the method of material flow analysis, and measures for SO2 emission reduction are put forward as assessment and target intervention of the resu... Sulfur flow for new generation steel manufacturing process is analyzed by the method of material flow analysis, and measures for SO2 emission reduction are put forward as assessment and target intervention of the results. The results of sulfur flow analysis indicate that 90 % of sulfur comes from fuels. Sulfur finally discharges from the steel manufacturing route in various steps, and the main point is BF and BOF slag desulfurization. In sintering process, the sulfur is removed by gasification, and sintering process is the main source of SO2 emission. The sulfur content of coke oven gas (COG) is an important factor affecting SO2 emission. Therefore, SO2 emission reduction should be started from the optimization and integration of steel manufacturing route, sulfur burden should be reduced through energy saving and consumption reduction, and the sulfur content of fuel should be controlled. At the same time, BF and BOF slag desulfurization should be optimized further and coke oven gas and sintering exhausted gas desulfurization should be adopted for SO2 emission reduction and reuse of resource, to achieve harmonic coordination of economic, social, and environmental effects for sustainable development. 展开更多
关键词 material flow analysis sulfur flow analysis steel industry sustainable development SO2 emission
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Effects of Carbonation on Micro Structures of Hardened Cement Paste 被引量:2
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作者 柳俊哲 yao senyuan +2 位作者 ba mingfang he zhimin 李玉顺 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2016年第1期146-150,共5页
In order to investigate the effects of carbonation on the microstructure of cement concrete,the carbonation depth and microstructure of cement paste with 0.3,0.4 and 0.5 water/cement ratio after 7,14,21 and 28 d accel... In order to investigate the effects of carbonation on the microstructure of cement concrete,the carbonation depth and microstructure of cement paste with 0.3,0.4 and 0.5 water/cement ratio after 7,14,21 and 28 d accelerated carbonation were studied respectively.The results showed that with the increase of waterto-cement ratio and carbonation age,the carbonation depth was deepened with faster early carbonation speed and slower later carbonation rate.Carbonation densified the structure of hardened cement stone with refinement of pore structure and reduced porosity.Then,during the carbonation process from the surface to the inside of carbonation area,it was prone to form micro-cracks extending to the interior specimen,resulting in cement paste carbonation depth uneven.It is further illustrated that the color reaction method using phenolphthalein solution combined with X-CT and X-ray diffraction analysis is much more reasonable to evaluate the cement concrete carbonation degree.Moreover,during carbonation process sulfur element in cement paste migrated to the area un-carbonated and the concentrated shape of sulfur element is consistent with the coloring region in carbonation interface.Finally it was identified that carbonation not only reduced the p H value in cement concrete but also made prone to crack in carbonation zone,which increased the probability of reinforcement corrosion. 展开更多
关键词 hardened cement paste carbonation sulfur microstructure X-CT analysis
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Continuous desulfurization and bacterial community structure of an integrated bioreactor developed to treat SO_2 from a gas stream 被引量:6
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作者 Jian Lin Lin Li +2 位作者 Wenjie Ding Jingying Zhang Junxin Liu 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2015年第11期130-138,共9页
Sulfide dioxide(SO2) is often released during the combustion processes of fossil fuels. An integrated bioreactor with two sections, namely, a suspended zone(SZ) and immobilized zone(IZ), was applied to treat SO2... Sulfide dioxide(SO2) is often released during the combustion processes of fossil fuels. An integrated bioreactor with two sections, namely, a suspended zone(SZ) and immobilized zone(IZ), was applied to treat SO2 for 6 months. Sampling ports were set in both sections to investigate the performance and microbial characteristics of the integrated bioreactor. SO2 was effectively removed by the synergistic effect of the SZ and IZ, and more than 85%removal efficiency was achieved at steady state. The average elimination capacity of SO2 in the bioreactor was 2.80 g/(m3·hr) for the SZ and 1.50 g/(m3· hr) for the IZ. Most SO2 was eliminated in the SZ. The liquid level of the SZ and the water content ratio of the packing material in the IZ affected SO2 removal efficiency. The SZ served a key function not only in SO2 elimination, but also in moisture maintenance for the IZ. The desired water content in IZ could be feasibly maintained without any additional pre-humidification facilities. Clone libraries of 16 S r DNA directly amplified from the DNA of each sample were constructed and sequenced to analyze the community composition and diversity in the individual zones.The desulfurization bacteria dominated both zones. Paenibacillus sp. was present in both zones, whereas Ralstonia sp. existed only in the SZ. The transfer of SO2 to the SZ involved dissolution in the nutrient solution and biodegradation by the sulfur-oxidizing bacteria.This work presents a potential biological treatment method for waste gases containing hydrophilic compounds. 展开更多
关键词 Biological deodorization Integrated bioreactor sulfur dioxide sulfur bacteria DNA sequence analysis Clone library
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Temporal variation of microbial population in a thermophilic biofilter for SO_2 removal 被引量:2
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作者 Jingying Zhang Lin Li Junxin Liu 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2016年第1期4-12,共9页
The performance of a biofilter relies on the activity of microorganisms during the gas contaminant treatment process. In this study, SO2 was treated using a laboratory-scale biofilter packed with polyurethane foam cu... The performance of a biofilter relies on the activity of microorganisms during the gas contaminant treatment process. In this study, SO2 was treated using a laboratory-scale biofilter packed with polyurethane foam cubes(PUFC), on which thermophilic desulfurization bacteria were attached. The thermophilic biofilter effectively reduced SO2 within 10 months of operation time, with a maximum elimination capacity of 48.29 g/m^3/hr.Temporal shifts in the microbial population in the thermophilic biofilter were determined through polymerase chain reaction-denaturing gradient gel electrophoresis and deoxyribonucleic acid(DNA) sequence analysis. The substrate species and environmental conditions in the biofilter influenced the microbial population. Oxygen distribution in the PUFC was analyzed using a microelectrode. When the water-containing rate in PUFC was over 98%, the oxygen distribution presented aerobic–anoxic–aerobic states along the test route on the PUFC. The appearance of sulfate-reducing bacteria was caused by the anaerobic conditions and sulfate formation after 4 months of operation. 展开更多
关键词 Thermophilic biofilter sulfur dioxide Microbial population DGGE analysis O2 distribution
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