当前位置: X-MOL 学术Appl. Petrochem. Res. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Enhancement of mesophase formation in paraffinic-rich clarified oil using transition metal catalysts (Cr and Cu)
Applied Petrochemical Research Pub Date : 2019-01-04 , DOI: 10.1007/s13203-018-0224-7
Subhash Kumar , Manoj Srivastava

In the present work, we have made attempts to prepare petroleum pitches from paraffinic-rich clarified oil (CLO) by giving thermal treatment at 370 °C in the presence of Cu and Cr catalysts. The feed CLO is predominantly paraffinic in nature, so it takes fairly large thermal soaking time (21 h) to convert into pitch having mesophase content below countable limits. To increase the mesophase content in the pitch or to make mesophase pitch, 3 wt % transition metal catalysts (Cu and Cr) were added to CLO. Addition of transition metal catalysts not only enhances mesophase formation but also helps to reduce thermal treatment time by promoting polymerization and condensation reactions at a faster rate. The mesophase formation pattern reveals that Cu and Cr catalysts increase the mesophase content from below countable limit to 12 and 9 vol %, respectively. This indicates that Cu and Cr showed better catalytic activity for mesophase formation growth. The effect of transition metal catalysts on physico-chemical properties (softening point, coking value, toluene insolubles and quinoline insolubles) as well as the optical texture and physical properties of mesophase pitches were investigated by optical microscope, FT-IR, SEM, NMR, TG/DTG and XRD.

中文翻译:

使用过渡金属催化剂(Cr和Cu)增强富含链烷烃的澄清油的中间相形成

在目前的工作中,我们已经尝试通过在Cu和Cr催化剂的存在下于370°C进行热处理,从富含链烷烃的澄清油(CLO)制备石油沥青。进料CLO本质上主要是链烷烃,因此要花费相当长的热浸时间(21 h)才能转化为中间相含量低于可计数极限的沥青。为了增加沥青中的中间相含量或使中间相沥青,将3重量%的过渡金属催化剂(Cu和Cr)添加至CLO。过渡金属催化剂的加入不仅增强了中间相的形成,而且还通过更快地促进聚合和缩合反应而有助于减少热处理时间。中间相的形成模式表明,Cu和Cr催化剂将中间相的含量分别从可计数的极限以下增加至12和9vol%。这表明Cu和Cr对中间相形成生长显示出更好的催化活性。用光学显微镜,FT-IR,SEM,NMR考察了过渡金属催化剂对物化性质(软化点,焦化值,甲苯不溶物和喹啉不溶物)以及中间相沥青的光学结构和物理性质的影响。 TG / DTG和XRD。
更新日期:2019-01-04
down
wechat
bug