CAJ | 학술논문

基于分子管理理念，对脱有机硫复配型溶剂进行组成设计。采用两维溶解度参数理论，筛选出与甲硫醇溶解度参数接近的溶剂作为复配溶剂中提高甲硫醇脱除率的组分；并根据胺的碱性、空间位阻效应对其与 COS反应速率的影响规律，选择具有较小空间位阻效应和适当强度碱性的环状胺类作为提高COS脱除率的溶剂组分。根据原料气的有机硫分布特点，将所筛选的溶剂组分按一定比例配入 N-甲基二乙醇胺（MDEA）中，获得了两种复配溶剂（UDS-I，UDS-II）。脱硫实验结果表明，对于COS占有机硫总量94%的天然气，UDS-I溶剂的COS脱除率较MDEA高出近44个百分点，其净化天然气质量满足一类气的指标要求；对于甲硫醇占有机硫总量79%的焦化液化气，UDS-II溶剂的甲硫醇脱除率较MDEA高出近50个百分点，其净化液化气的总硫含量满足民用液化气指标要求。
기우분자관리이념，대탈유궤류복배형용제진행조성설계。채용량유용해도삼수이론，사선출여갑류순용해도삼수접근적용제작위복배용제중제고갑류순탈제솔적조분；병근거알적감성、공간위조효응대기여 COS반응속솔적영향규률，선택구유교소공간위조효응화괄당강도감성적배상알류작위제고COS탈제솔적용제조분。근거원료기적유궤류분포특점，장소사선적용제조분안일정비례배입 N-갑기이을순알（MDEA）중，획득료량충복배용제（UDS-I，UDS-II）。탈류실험결과표명，대우COS점유궤류총량94%적천연기，UDS-I용제적COS탈제솔교MDEA고출근44개백분점，기정화천연기질량만족일류기적지표요구；대우갑류순점유궤류총량79%적초화액화기，UDS-II용제적갑류순탈제솔교MDEA고출근50개백분점，기정화액화기적총류함량만족민용액화기지표요구。
Based on the molecular management theory,the rational formulations of mixed solvents for removing organic sulfurs were designed. Using a two-dimensional solubility parameter theory,the solvents,with similar solubility parameters for methyl mercaptan as compared with alkanolamines, were selected as key components of formulated solvents to remove methyl mercaptan. According to the influence of basicity and steric hindrance of amines on the reaction rates of amines with carbonyl sulfide,the heterocyclic amines with less steric hindrance and moderate basicity were used as key components to enhance removal efficiency for carbonyl sulfide. Depending upon the distributions of organic sulfur in feed gases,the selected solvent components were added to N-methyl diethanolamine (MDEA),then two kinds of formulated solvents (UDS-I and UDS-II) were obtained. The results of desulfurization experiments showed that for the natural gas in which carbonyl sulfide accounted for 94%of total organic sulfur,removal efficiency for carbonyl sulfide with UDS-I was approximately 44 percentage points higher than that of MDEA. The purified natural gas well satisfied the requirement of first-grade commercial gas. For the delayed coking LPG in which methyl mercaptan accounted for 79%of total organic sulfur,removal efficiency for methyl mercaptan of UDS-Ⅱ was about 50 percentage points higher than that of MDEA. The purified LPG could be directly used as civil LPG.