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一种高有机硫煤的化学药剂脱硫研究 总被引:6,自引:0,他引:6
选择复合脱硫剂在酸性条件下研究脱硫条件(煤浆浓度、处理时间、复合脱硫剂的浓度及溶液酸度)对高有机硫煤总硫、无机硫和有机硫脱硫率的影响.研究表明,煤浆浓度越低、处理时间越长、复合脱硫剂的浓度越大、处理溶液的酸度越大,总硫、无机硫和有机硫的脱硫率越大,最后对处理液和脱硫精煤进行了组分分析,探讨了酸性条件下复合脱硫剂脱除煤中总硫的反应及脱硫机理. 相似文献
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煤热解过程中硫的脱除 总被引:1,自引:0,他引:1
本文研究了山东省和四川省5个煤阶的7种高硫煤在400~900℃热解温度下有机硫的脱除、硫铁矿硫的分解及脱除,评价了煤阶、温度、硫分组成对脱硫效果的影响,并对热解脱硫机理进行了探讨。 相似文献
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采用微波联合超声波分别对潞安煤、西山煤、云南煤和阳泉煤进行脱硫研究.考察了氧化剂配比、微波辐照时间、超声波联合微波等条件对煤中有机硫脱除效果的影响.实验结果表明,不同氧化剂配比有不同的脱有机硫效果.其中,V(HAc):V(H2O2)=1∶1时,脱硫效果最佳;微波辐照时间对脱硫率有明显的影响,随着微波辐照时间的延长,有机... 相似文献
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本文叙述了氧化煤脱硫液中酒石酸钾钠的分离和测定方法。采用葡聚糖凝胶G-25过滤法分离脱硫液中VO_3~-、NO_2~-及有机干扰物质,然后用过碘酸钾容量法测定酒石酸钾钠。测定结果证明:酒石酸钾钠在氧化煤脱硫液中易起反应、迅速消失。因此,采用酒石酸钾钠作为氧化煤脱硫液中VO~(?)的络合剂是不适宜的。 相似文献
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煤中黄铁矿的电化学脱硫及动力学研究 总被引:2,自引:1,他引:2
为了降低煤的脱硫费用和提高脱硫效率,以硫酸为介质,以硫酸锰为脱硫催化剂,在以石墨为电极的无隔膜电解池中研究了煤的电化学催化脱硫。研究表明,在特定的电解电位下,煤中无机硫脱硫率随着锰离子的浓度增加,煤浆浓度的降低和电解温度的提高而提高。进而对这些数据进行了动力学分析。结果表明:煤中黄铁矿脱硫速率与煤中活性黄铁矿(易接近)和惰性黄铁矿(难接近)及脱硫反应有关,脱硫模型符合Langmuir-Hinshelwood近似,脱硫表观活化能为10.44kJ/mol。 相似文献
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《煤炭转化》2014,(3)
选取渭北石炭纪高有机硫煤与小麦秸秆进行共热解实验,采用正交实验考察了热解温度、升温速率、停留时间和煤与生物秸秆的混合比以及煤与生物秸秆成型压力等对热解脱有机硫及有机硫脱除规律的影响.结合FTIR和SEM分析了共热解半焦的结构特征、孔隙结构与发育情况,并讨论了低温溶剂萃取精制对煤与生物质共热解脱硫效果的影响.结果表明,热解温度对脱硫率的影响最显著.共热解制备较高脱硫率半焦所适宜的最佳水平为850℃,15℃/min,5min,1∶4和2MPa.共热解半焦孔结构发育整齐规则,孔壁薄,孔径较大,有利于热解过程中硫的析出与扩散.低温溶剂萃取提高了共热解脱硫率,尤其是热水精制煤与生物秸秆共热解脱硫率约为39%. 相似文献
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Gregory J. Olson 《Fuel Processing Technology》1994,40(2-3):103-114
Recent developments in microbiological desulfurization of coal are reviewed. Microbiological removal of organic sulfur from coal remains to be proven conclusively, but is under active study for petroleum biodesulfurization. Microbiological removal of pyritic sulfur from coal is well established in the laboratory and recent efforts have been aimed at scale-up designs and process considerations. Microbiological depyritization may be as inexpensive as other forms of advanced coal desulfurization but it has not been tested on a large scale. Processes based on ‘indirect’ bioleaching of pyrite from coal may also have applications. Other forms of sulfur in coal, such as elemental sulfur, are usually quantitatively insignificant, but nonetheless can be removed microbiologically. Thermophilic bacteria remove pyritic sulfur from coal at faster rates than mesophilic bacteria, in part due to faster abiotic rates of pyrite oxidation at elevated temperatures. Future work in biological desulfurization of coal should include studies on treatment of waste coal or refuse material. 相似文献
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微生物脱除煤中硫的技术进展 总被引:1,自引:0,他引:1
微生物脱硫技术在煤炭工业和环境保护等方面显示出潜在的优势。介绍了煤中硫的存在形式、脱硫微生物的分类和微生物脱硫机理以及微生物脱硫技术,并指出了微生物脱硫存在的问题和进一步研究的发展方向。 相似文献
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一种新的煤脱硫方法——加氢热解 总被引:4,自引:3,他引:4
大气中的二氧化硫是造成酸雨污染的最主要因素。有效脱除煤中的硫,控制二氧化硫的排放量是洁净利用高硫煤的关键。加氢热解是一种新的、具有很大潜力的煤综合利用途径和有效的脱硫方法。一系列的研究表明:加氢热解可以脱除煤中90%以上的硫,同时可获得有广泛用途的煤气、焦油和半焦产品。加氢热解过程中,不同形态硫的变迁以及矿物质与硫之间的相互作用研究,对于脱除煤中的硫有重要的理论指导意义。 相似文献
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通过对南桐矿务局多年来在高硫煤洗选加工,烟道气脱硫,燃烧固硫及高温固添加剂上所做工作的分析总结,提出“配煤+筛分降硫+洗选脱硫+固硫添加剂掺配+副产品选硫”等一条龙洁净煤技术的综合应用,是高硫动力煤合理分选,洁净利用的发展方向,与单纯烟道气脱硫,重庆市 相似文献
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引 言燃烧脱硫技术是在高温燃烧过程中将煤中的硫转化为硫酸盐或硫化物 ,因而其固硫率与硫酸盐或硫化物的热力学形成过程密切相关 .据文献报道 ,CaSO3和CaSO4 分别在 10 0 4℃[1] 和 1195~ 12 14℃[2 ] 就已开始分解 .纯CaSO4 在 12 5 0℃高温下的分解率为 85 % .纯BaSO4 的分解温度为 15 80℃[3] ,大大高于CaSO4 ,显示较高的热稳定性 .根据元素周期表递变规律 ,位于第 6周期的Ba较位Fig .1 Schematicofintelligentsulfurdetermination1—mainframeofin… 相似文献
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G. Olsson B.-M. Pott L. Larsson O. Holst H.T. Karlsson 《Fuel Processing Technology》1994,40(2-3):277-282
Several different microorganisms have been suggested for coal desulfurization. In the present investigation, the thermophilic archaea Acidianus brierleyi (DSM 1651), Sulfolobus acidocaldarius (DSM 639) and Sulfolobus solfataricus (DSM 1616) were compared with the mesophilic bacterium Thiobacillus ferrooxidans (DSM 583) concerning their capability of removing sulfur from coal. The desulfurization rate as well as the amount of sulfur removed by the microorganisms was studied.
Two of the investigated microorganisms, Thiobacillus ferrooxidans and Acidianus brierleyi, were capable of oxidizing pure pyrite as well as oxidizing sulfur in coal. A kinetic analysis was performed assuming first order reactions. The rate constant for oxidation of pure pyrite by A. brierleyi was observed to be higher than for T. ferrooxidans. The values of the rate constants for sulfur removal from coal were comparable for the two microorganisms, but were higher than for oxidation of pure pyrite. 相似文献
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The coal poly-generation system for the production of alcohol and ether fuels as well as power is one of advanced coal utilization techniques. The team leaded by Professor Xie Kechang is carrying out the research on the poly-generation system to produce the syngas from the combination of gasified and pyrolyzed coal gas (dual gas resources) for the alcohol ether synthesis. Gas desulfurization is one of the key technologies for this system. The desulfurization matching with dual gas resources based poly-generation system for the production of alcohol and ether fuels as well as power is presented according to gas components, sulfur content, sulfur species and desulfurization accuracy in this technology. This matching desulfurization is classified into hot gas desulfurization, normal gas desulfurization, warm gas desulfurization and organic sulfur catalytic conversion. The preparation of H2S removal sorbents, organic sulfur hydrolysis catalyst and the evaluation of their activities involved in the system were investigated. The H2S removal efficiencies of the crude and fine desulfurization sorbents prepared for hot gas desulfurization are 90% and 99% at 500 °C in simulating coal gas, and their sulfur capacities are 21.85 wt.% and 24.91 wt.%, respectively. The organic sulfur catalyst shows the high hydrolysis activity, and the hydrolysis conversion of COS is more than that of CS2 on the same catalyst. The research will provide necessary information for the matching desulfurization technology in the demonstration project on dual gas resources coal poly-generation system. 相似文献
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煤的化学氧化脱硫技术及其研究 总被引:3,自引:0,他引:3
以贵州省某煤矿炼焦煤为原料,采用了Fe3+、H2O2、HNO3等氧化剂进行了氧化脱硫处理,发现在较为温和的实验反应条件下,HNO3-HAC体系能够有效地脱除原煤中的大部分无机硫与部分有机硫,进而系统地考察了反应物用量、时间、温度等条件对脱硫效果的影响,结果表明,在HNO3-HAC溶液中,95℃左右反应1h,实验煤样全硫脱除率能够达到60%,有机硫脱除率可以达到50%以上。 相似文献