油砂沥青质对油砂沥青中甲苯残留的影响  

Effect of oil sand asphaltenes on toluene residue in oil sands bitumen

作　　者：宋焦焦 张自生[1,2] 隋红 何林[1,2] 李鑫钢 SONG Jiaojiao;ZHANG Zisheng;SUI Hong;HE Lin;LI Xingang(School of Chemical Engineering&Techonology,Tianjin University,Tianjin 300072,China;National Engineering Research Center for Distillation Technology,Tianjin 300072,China;Collaborative Innovation Center of Chemical Science and Engineering,Tianjin 300072,China)

机构地区：[1]天津大学化工学院,天津300072 [2]精馏技术国家工程研究中心,天津300072 [3]天津化学化工协同创新中心,天津300072

出　　处：《化工进展》2020年第1期65-71,共7页Chemical Industry and Engineering Progress

基　　金：国家重点研发计划(2018YFC1902104)

摘　　要：利用热重质谱联用仪(TG-MS)分析了三种油砂沥青(印尼油砂沥青、伊朗油砂沥青、加拿大油砂沥青)中的甲苯残留以及油砂沥青质含量对油砂沥青中甲苯残留的影响,并在此基础上,进一步研究了油砂沥青质中的甲苯残留。结果发现,不同油砂沥青中甲苯残留量存在一定差异,其中印尼油砂沥青中的甲苯残留量最多。进一步对沥青质质量分数分别为10%、19%、30%的油砂沥青样品进行热重质谱实验,发现随着油砂沥青中沥青质含量的增加,甲苯的残留量会成倍增加。以加拿大油砂沥青质为例,研究了油砂沥青质对溶剂残留的影响,发现油砂沥青质具有对甲苯分子的夹带能力,导致甲苯分子在超过自身沸点40℃以上才能从沥青质中分离出来。油砂沥青中其他组分的存在也会加剧沥青质对甲苯的夹带作用。此外,研究还发现,在350~650℃时,油砂沥青质可以热解产生甲苯,而且油砂沥青中的沥青质含量越高,热解生成的甲苯越多。The toluene residues in three oil sands bitumen(Indonesia oil sands bitumen, Iran oil sands bitumen, and Canadian oil sands bitumen), the oil sands bitumen with different asphaltenes content and the oil sands asphaltenes were analyzed by thermogravimetric mass spectrometer(TG-MS). It was found that toluene would remain in different oil sands bitumen, and the relative amount of toluene residues in Indonesian oil sands bitumen was the biggest. The TG-MS was carried out on oil sands bitumen samples with asphaltenes mass ratio of 10%, 19% and 30%, respectively. It showed that the entrainment amount of solvent(for example, toluene) increased exponentially with the increase of asphaltenes content in the oil sands bitumen. Taking Canadian oil sands asphaltenes as an example, the effect of oil sands asphaltenes on solvent residue was further studied. It was found that oil sands asphaltenes had the entrainment ability of toluene molecules. The toluene molecules were released from oil sands asphaltenes exceeded the boiling point of toluene by more than 40℃. The presence of other components of the bitumen exacerbates the entrainment of toluene solvent molecules. In addition, the experimental results also indicated that the pyrolysis of oil sands asphaltenes could produce toluene between 350-650℃, and the higher the content of asphaltenes in oil sands bitumen was, the bigger the amount of toluene produced by bitumen pyrolysis was.

关 键 词：油砂沥青质 油砂沥青 热重-质谱 甲苯残留 溶剂损失 

分 类 号：TE65[石油与天然气工程—油气加工工程]