Molecular characterization of polar heteroatom species in oilsands bitumen-derived vacuum residue fractions by Fourier transform ion cyclotron resonance mass spectrometry

A Canadian in situ oilsands bitumen-derived vacuum residue(VR)was subjected to supercritical fluid extraction and fractionation(SFEF)into 13 extractable fractions and an unextractable end-cut and characterized by positive-and negative-ion electrospray ionization(ESI)Fourier transform ion cyclotron resonance mass spectrometry(FT-ICR MS).The results of negative-ion ESI FT-ICR MS showed that the N1 class species was the most abundant and the multifunctional group compounds,such as N1 O1,N1 O2,N1 S1,N1 S2,and N2 class species became abundant as the SFEF fraction became heavier.In positive-ion ESI mode,the relative abundance of N1 class species decreased gradually in the heavy SFEF fractions while that of multifunctional group compounds increased.The relative abundance of N4 V1 O1 increased dramatically in heavy fractions and the end-cut.The distributions of polar heteroatom species of VR derived from oilsands bitumen were similar with those of VR derived from the Venezuela Orinoco extra heavy oil.

Diesel and Jet Fuels from Bitumen-derived Middle Distillates

Narrow fractions of light gas oils obtained from various upgrading processes of Athabasca oilsands bitumen were investigated as diesel and jet fuels. The relationship among the boiling range, cetane number, smoke point, and other properties such as aromatics content, aniline point, and the sulfur and nitrogen content was also studied. The study reveals that when appropriate processes and distillation boiling ranges are selected, oilsands bitumen can produce diesel and jet fuels that meet stringent environmental regulations and future product specifications. New correlations to predict CN and smoke point were developed as a function of density, boiling ranges by simulated distillation, and mono- and total aromatics by supercritical fluid chromatography. The correlations apply to bitumen-derived middle distillates that have a wide range of boiling points.

渣油中溶于正庚烷但不溶于正戊烷沥青质性质分析

利用GPC,XRD,1H-NMR,SEM及HyperChem模拟等技术手段对加拿大油砂沥青减压渣油VTB中溶于正庚烷但不溶于正戊烷的沥青质((C5-C7)沥青质)的性质进行了考察,并与正戊烷沥青质、正庚烷沥青质进行了比较。结果表明,(C5-C7)沥青质的质量分数为9.80%,主要由小分子组成,其芳香片层没有形成堆积结构,在三种沥青质中拥有最低的芳碳率和芳香环数,但环烷环数的数目最多(2.60个),与芳香环相连的烷基链的长度要高于另外两种沥青质0.5个碳原子,该种沥青质颗粒尺寸较大,表面光滑、平整,能量最高(266.73 kJ/mol),稳定性最差。

加入环戊烷对超临界溶剂脱沥青加工加拿大油砂沥青的影响

在超临界溶剂脱沥青耦合脱油沥青喷雾造粒装置上,将加拿大油砂沥青分离为脱沥青油及脱油沥青,通过对比在正戊烷中加入体积分数10%环戊烷前后得到的脱沥青油及脱油沥青性质变化来考察环戊烷对溶剂脱沥青的影响。结果表明,加入环戊烷可以提高脱沥青油质量收率1%～4%,当收率为67%～71%时,2种溶剂得到的脱沥青油性质接近,但是脱油沥青软化点比加入环戊烷之前却可以提高3～13℃,从而能够生产出优异的沥青粉。

改性沸石催化剂对油砂沥青的改质研究

本研究通过对天然斜发沸石进行HC1酸洗脱调节硅铝比,再负载Ni金属氧化物,经焙烧改性得到了同时具有对油砂沥青催化减黏、降低硫氮含量等性能的新型催化剂Clin-c,将该催化剂应用于新疆油砂沥青（露天含砂开采）和加拿大油砂沥青（蒸汽辅助重力泄油技术开采,SAGD）的改质反应.油砂沥青具有高黏度（～30 000 cP,40℃）、高硫（0.56％～4.8％）、高氮（0.73％～2.38％）、高沥青质含量（34.64％）等特点.采用改性斜发沸石催化剂改质后,新疆油砂沥青剂油比1∶1,在340℃催化裂化反应30 min,减黏率超过80％,脱氮率在45％～52％之间,脱硫率高于75％,同时大量非烃被催化裂化为轻质油.并用此优异的催化剂对加拿大油砂沥青进行了改质研究,剂油比1∶10发现减黏率超过75％,脱氮率在10％～32％之间.结果表明,改性斜发沸石催化剂对油砂沥青具有很好的催化减黏、脱硫氮性能.

菱沸石-粘土复合物在沥青精制中的应用(英文)

阿尔伯塔的油砂资源日益成为北美重要的战略性能源供给.本实验室通过采用碱性条件下在高岭土表面上组装菱沸石的方法,合成了新型的菱沸石-粘土复合材料,并证明此复合材料是比菱沸石更好的油砂沥青精制剂.XRD,SEM,TEM,N2物理吸附和XPS表面元素分析结果表明,菱沸石-粘土复合材料具有大体积烃类分子可及的独特的外表面,该复合材料不仅可降低油砂沥青的裂解反应温度,同时还可大幅度脱除沥青中的硫、氮、镍和钒等杂质.