共查询到18条相似文献,搜索用时 62 毫秒
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评价了再生时间、循环次数、水热老化以及重金属污染对FCC硫转移助剂脱硫活性的影响。结果表明:随着再生时间的延长,硫转移助剂的活性增加,10 min之后达到稳定;随着反应再生次数的增加,脱硫活性逐渐降低,四个循环之后达到稳定;水热老化使助剂的脱硫活性降低了约40%;Ni会造成脱硫活性的降低,Ca对脱硫活性没有影响,V和Fe能够提高助剂的脱硫活性。 相似文献
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某催化裂化装置增设烟气脱硫设施后可实现外排烟气的环保达标,但是在实际运行中存在烟气脱硫设施吸收浆液循环量波动大和碱液消耗量大的问题。通过使用CSC硫转移剂,在催化原料性质基本不变的条件下,催化再生烟气中的SO2浓度大幅度下降,极大缓解了烟气脱硫设施的脱硫压力,不仅降低了烟气脱硫设施的运行成本,而且减缓了设备的腐蚀和结垢,有利于装置长周期运行。同时使用CSC硫转移剂对装置产品分布和产品收率无不良影响。 相似文献
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硫转移剂在催化裂化装置中的运用 总被引:3,自引:0,他引:3
通过分析催化裂化装置中硫分布的影响因素和SOx的转移机理,介绍了国内外硫转移剂的应用和研究情况。最后结合我厂的实际情况提出了一些建议。 相似文献
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This paper describes desulfurization characteristics of low sulfur coals prior to combustion and optimum conditions of three
different desulfurization processes. These processes include two thermal treatment processes (mild pyrolysis and air oxidation)
and an H2O2 leaching process. Dual processes composed of thermal and leaching processes were also evaluated. Low sulfur coals employed
were two imported bituminous coals and two domestic anthracite coals. The optimum reaction temperatures and times of the thermal
processes were 500–550 °C and 15–20 minutes, respectively. The optimum condition for the leaching process was obtained when
the experiment carried out for 60 min at 90 °C using 30% H2O2. The dual process showed the best sulfur removal efficiency as expected among the evaluated processes.
This paper is dedicated to Professor Hyun-Ku Rhee on the occasion of his retirement from Seoul National University. 相似文献
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An improved desulfurization process for removing sulfur from hydro treated diesel oil based on the oxidation of thiophenic type sulfur-containing compounds with H2O2 and acetic acid (AcOH) using H2SO4 as catalyst has been studied. The experimental results show that the sulfone content in the oxidation product increased rapidly with an increase in acetic acid and sulfuric acid ratios from 1:0 to 2:1 mole ratios. The maximum DBT conversion (wt.%) was at 2:1 mole ratio of acetic acid/sulfuric acid. This oxidation process is found to be capable of removing up to 90% of the sulfur compounds in hydro treated real fuels and can provide an alternative way to meet the future sulfur environmental requirements. 相似文献
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采用BBD(Box—BehnkenDesign)响应面法设计实验,利用实验室保存的菌株ND(Acin咖6口c衙sp.ND)研究了煤浆质量分数、菌种接种量、煤样粒度等因素对高硫煤中有机硫脱除率的影响。结果表明:菌株ND在煤浆质量分数20%、接种量50%(OD600=1.2)、煤样粒度0.125—0.097mm的条件下,经30℃,160r/min摇床培养8d后,高硫煤中有机硫脱除率达71.3l%;其中各因素对煤样有机硫脱除率影响的主次顺序为:煤样粒度〉煤浆质量分数〉接种量,煤样粒度和煤浆质量分数的交互作用显著,而煤样粒度与接种量及接种量与煤浆质量分数的交互作用不显著。最后通过对比脱硫前后煤样的红外光谱分析了有机硫的脱除机理,脱硫后煤的碳骨架变化小,但煤样的硫特征峰明显减弱,说明菌株ND能打断煤中S—O和-S-S-键,使之变为可溶性硫成分以实现有机硫的脱除。 相似文献
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