【作者】 王荷芳；

【导师】 王延吉；

【作者基本信息】 河北工业大学 ， 化学工艺， 2004， 硕士

【摘要】 开发了系列液化石油气配方脱硫剂和物理-化学复合脱硫剂，并对脱硫剂的泡沫性能进行了研究，对空间位阻胺-H₂S体系汽液相平衡进行了测定，用电解质溶液理论建立了空间位阻胺-H₂S体系汽液平衡模型。 首先采用GC-MS和FT-IR分析了液化石油气复合脱硫剂，对常用醇胺单剂及复合脱硫剂的脱硫效果进行了评价，对二异丙醇胺浓度对总硫脱除率的影响进行了考察。研究了浓度、温度对物理溶剂聚乙二醇二甲醚、环丁砜、N-甲基吡咯烷酮脱硫效果的影响，对解吸后物理溶剂的脱硫效果进行了考察，并对解吸后的物理溶剂对总硫的脱除率有所下降的原因进行了探索，提出了在实际生产过程中，防止溶剂氧化降解的措施。根据空间位阻胺的脱硫机理，开发液化石油气新型空间位阻胺脱硫剂二氮杂二环和六次甲基四胺，考察了浓度和温度对间位阻胺脱硫剂脱硫效果的影响。 以N-甲基二乙醇胺为主剂，分别考察了二乙醇胺、三乙醇胺二异丙醇胺或二氮杂二环的添加，对N-甲基二乙醇胺脱硫效果的影响，开发一系列配方脱硫剂。 用物理溶剂聚乙二醇二甲醚、环丁砜或N-甲基吡咯烷酮代替配方脱硫剂中的水，开发系列物理-化学复合脱硫剂，考察了温度对物理-化学复合脱硫剂的影响，发现低温有利于脱硫剂保持对总硫较高的脱除率。为降低脱硫剂成本，对筛选的物理-化学复合脱硫剂配方进行了优化，考察了原料气硫含量的波动对优选出的物理-化学复合脱硫剂的影响。在相同的评价条件下，将筛选出的物理-化学复合脱硫剂与YXS-99复合脱硫剂的脱硫效果进行比较，发现筛选出的物理-化学复合脱硫剂净化深度和硫负荷明显大于YXS-99复合脱硫剂。 考察了Fe（0H）₃、FeS和活性炭颗粒大小和浓度对N-甲基二乙醇胺溶液、SDS-1、SDS-3和SDS-5的泡沫性能影响，提出消除固体颗粒对脱硫剂影响的措施，考察了温度和N₂流量对N-甲基二乙醇胺溶液、SDS-1、SDS-3和SDS-5的泡沫性能的影响。 对二氮杂二环-H₂S体系汽液相平衡进行了测定，用电解质溶液理论法对二氮杂二环-H₂S体系汽液平衡进行预测，计算值与实验值的平均误差在±40％以内。更多还原

【Abstract】 A series of compound desulfurizers and physico-chemical compound desulfurizers for liquified petroleum gas were developed and the foaming properties of desulfurizers were studied. Vapour-liquid equilibrium of H2S in aqueous solution of sterically hindered amine was measured and the model of the vapour-liquid equilibrium was developed based on electrolyte solution theory.The composition of compound desulfurizers for liquified petroleum gas was determined by GC-MS and FT-IR. The desulfurization effect of ethanol-amine desulfurizers and compound desulfurizers was examined. The effect of concentration of diisopropanol amine on absorptivity for overall sulfur was investigated. The influence of concentration and operation temperature of physical solvents, such as polyethylene glycol dimethyl ethers, solfolane and N-methyl-2-pyrrolidone, on desulfurization effect was studied. The influence of those physical solvents after regeneration on desulfurization effect was also investigated. The reason that the absorptivity of physical solvents for overall sulfur decreased after regeneration was studied. A measure for prevention oxidation degration of the physical solvents in practical production process was proposed. New type sterically hindered amine desulfurizers, l,8-diazabicyclo-[5,4,0]-undec-7-ene and hexamethylenetetramine were developed based on desulfurization mechanism of sterically hindered amine. The influence of concentration and operation temperature of l,8-diazabicyclo-[5,4,0]-undec-7-ene and hexamethylenetetramine on desulfurization effect was studied.The effect of addition of diethanolamine, triacetamide, diisopropanol or 1,8-diazabi-cyclo-[5,4,0]-undec-7-ene on absorptivity of methyldiethanolamine solution for sulfur was investigated. A series of compound desulfurizers were developed.Physical solvents, such as polyethylene glycol dimethyl ethers, solfolane and N-methyl-2-pyrrolidone, replaced water in compound desulfurizers. A series of physico-chemical compound desulfurizers were developed. The influence of operation temperature on desulfurization effect of physico-chemical compound was studied. The result shows that low operation temperature was in favor of physico-chemical compound desulfurizers to keep higher absorptivity for overall sulfur. In order to reduce the cost, the composition of physico-chemical compound desulfurizers obtained was optimized. The influence of the sulfur content fluctuation of feed ondesulfurization effect of optimized physico-chemical compound desulfurizers was also investigated. The purified depth and sulfur load of the optimized physico-chemical compound desulfurizer were higher than YXS-99 compound desulfurizer.The effect of particles size and concentration of Fe(OH)3, FeS and active carbon on foaming property of methyldiethanolamine solution, SDS-1, SDS-3 and SDS-5 desulfurizers was studied. A measure for eliminating the effect of particles on desulfurizers was proposed. The effect of operation temperature and N2 flow rate on foaming property of methyldiethanolamine solution, SDS-1, SDS-3 and SDS-5 was also investigated.Vapour-liquid equilibrium data of H2S in aqueous solution of 1,8-diazabicyclo-[5,4,0]-undec-7-ene was obtained pour-liquid equilibrium model was developed based on the theory of electrolyte. The average deviation of predicted value from experimental value was less than ±40%.更多还原