Application of mesoporous carbon, carbon nanohorns and M-SBA-15 (M=Zr and Ti) as support to Ni-Mo hydrotreating catalysts

近年来，由于越来越严格的环境法规以及对重质原油砂衍生沥青的日益依赖，石油工业面临着巨大的挑战。Syncrude加拿大有限公司目前每天从油砂中生产25万桶合成原油。重质气油是合成原油的主要成分，它含有大量的硫（4 wt%）和氮（0.4 wt%），需要去除以满足下游炼油工艺的要求。虽然硫的脱除相对容易，但用上述加氢催化剂脱除油砂衍生油中的氮却比较困难。众所周知，Ni-Mo加氢处理催化剂的催化性能在一定程度上取决于所使用的载体。近年来，人们对将孔径扩展到介孔区的新型分子筛的合成越来越感兴趣。所制得的介孔分子筛具有不同的结构和孔径，可以在1.6-30nm的宽范围内控制。这些新型分子筛为受沸石微孔（通常小于1nm）限制的大型物种的形状选择性传感、吸附和催化提供了巨大的潜力。本课题旨在开发高表面积、宽孔M- sba -15 （M=Ti,Zr）、介孔碳和碳纳米角（CNHs）负载的高活性Ni-Mo硫化催化剂，用于Athabasca沥青衍生重质气（HGO）加氢脱氮（HDN）。高表面积、各种孔径的可用性、可变的表面官能团、易于通过燃烧载体回收金属、降低焦化倾向和抗氮中毒等特性有望提高Ni-Mo催化剂的活性。这些载体用于NiMo加氢处理催化剂，将有助于从重质原油的大块分子中去除N和S原子。这将有助于参与的辛克鲁德加拿大有限公司提高汽油的质量，以满足下游炼油工艺的要求。这项研究也有利于加拿大有效利用其丰富的石油资源。

In recent years, petroleum industries are facing tremendous challenges due to more stringent environmental regulations coupled with increasing reliance on heavy crude oil sands derived bitumen. Syncrude Canada Ltd. currently produces 250,000 bbl/day of synthetic crude oil from the oil sand. The heavy gas oil, which is a major component of this synthetic crude oil contains higher amounts of sulfur ( 4 wt%) and nitrogen ( 0.4 wt. %), which need to be removed to meet specifications of downstream refining processes. Although the removal of sulfur is relatively easy, it is difficult to remove nitrogen from oil sands derived oils with above hydroteating catalyst. It is well known that the catalytic performance of Ni-Mo hydrotreating catalyst depends on the support used to a certain extent, since. Recently there have been growing interests in the synthesis of new molecular sieves extending the pore diameter to the mesoporous region. The mesoporous molecular sieves are obtained with various structures and pore diameters that can be controlled over a wide range (1.6-30nm). These new molecular sieves offer great potential for the shape-selective sensing, adsorption, and catalysis of large species that were limited by the micropores (typically less than 1nm) of zeolites. The present research proposal aims at the development of highly active Ni-Mo sulfide catalysts supported on high surface area, wide pore M-SBA-15 (M=Ti,Zr), mesoporous carbon and Carbon Nano Horns (CNHs) for hydrodenitrogenation (HDN) of Athabasca bitumen derived heavy gas oil (HGO). The high surface area, availability of a large variety of pore sizes, variable surface functional groups, easy metal recovery by the burning of the support, reduced coking propensity, and resistance to nitrogen poisoning are expected to increase the activity of the Ni-Mo catalysts. The use of these supports for NiMo hydrotreating catalyst will facilitate the removal of N and S atoms from the bulky molecules of heavy crude oil. This will help the participating industry, Syncrude Canada Ltd. to improve the quality of gas oil, which will meet specifications of downstream refining processes. This research also benefits Canada by efficient utilization of its vast oil resources.