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纤维液膜接触器内复配型溶剂高效脱除液化气中有机硫

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对比纤维液膜接触器与筛板塔的传质面积、N-甲基二乙醇胺(MDEA)与4种复配型溶剂(UDS-Ⅰ, UDS-Ⅱ,UDS-Ⅲ,UDS-Ⅳ)对有机硫的溶解性能,并在纤维液膜接触器内考察操作条件对优选溶剂脱硫效果的影响。结果表明:在纤维液膜接触器内以 UDS-Ⅳ为优选溶剂脱除液化气中的硫化物,可从提高传质面积、传质推动力等方面提高有机硫传质速率,从而提高有机硫脱除率;UDS-Ⅳ溶剂对总有机硫的脱除率较 MDEA 高45.7百分点,总有机硫在 UDS-Ⅳ溶剂-液化气体系的分配比较 MDEA-液化气体系增加6~9倍;在优化的工艺条件下,UDS-Ⅳ溶剂可将焦化液化气的 H2 S 和总硫分别脱除至1 mg/m3和240 mg/m3以下,总有机硫脱除率高达93%以上。
FORMULATED SOLVENT FOR ORGANOSULFURS REMOVAL FROM LPG IN FIBER FILM CONTACTOR
The mass transfer areas of the fiber film contactor and the sieve plate tower,and the sol-ubility for organosulfurs of N-methyldiethanolamine (MDEA )and formulated solvents (UDS-Ⅰ, UDS-Ⅱ,UDS-Ⅲ,UDS-Ⅳ)were compared. In addition,the influence of operation conditions on the desulfurization performance of the preferred formulated solvent UDS-Ⅳ was investigated. The results indicate that the process combining UDS-Ⅳ and a fiber film contactor can increase the removal rate for organic sulfurs from LPG with improved mass transfer area and driving force. The removal rate for total organosulfur of UDS-Ⅳ solvent is 45.7 percentage points higher than that of MDEA. Meanwhile,the distribution ratios of organosulfurs in UDS-Ⅳ solvent-LPG system are found 7—10 times as much as those in MDEA-LPG system. Under optimum operation conditions,UDS-Ⅳ solvent can reduce the con-tents of H2 S and total sulfur of the LPG to less than 1 and 240 mg/m3 ,respectively,and the removal ef-ficiency for total organosulfur is above 93%.

liquefied petroleum gasdesulfurization solventorganosulfurmethyl mercaptancar-bonyl sulfidefiber film contactor

张峰、沈本贤、孙辉、刘纪昌

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华东理工大学化学工程联合国家重点实验室,上海 200237

液化气 脱硫溶剂 有机硫 甲硫醇 羰基硫 纤维液膜接触器

十二五国家科技重大专项课题中央高校基本科研业务费专项资金资助项目中国石油化工股份有限公司“十条龙”科技攻关项目

2011ZX05017-00522A201514010112125

2015

石油炼制与化工
中国石油化工股份有限公司石油化工科学研究院

石油炼制与化工

CSTPCDCSCD北大核心
影响因子:0.825
ISSN:1005-2399
年,卷(期):2015.(6)
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