Development of Low Cost Production Process for Sulfur-free Light Hydrocarbon Fuels Using Oxidation-Adsorption

本项目的目的是开发一种新的氧化-吸附相结合的氧化脱硫工艺。这一过程将在大气压和低于100℃的温度下运行。制备了一系列氧化催化剂。采用流动固定床反应系统考察了该催化剂对含有噻吩类(T)、烷基噻吩类和苯并噻吩类(BT)的模拟汽油在十氢萘或异辛烷中的氧化反应活性。钼系催化剂表现出较高的催化活性。各含硫化合物的反应活性如下：BT&gt；2，3，5Trimethylthiophene&gt；2-methylthiophene&gt；2，5-Dimethylthiphene&gt；T.此外，模拟汽油中所有含硫化合物的氧化均符合一级反应。估算了氧化速率常数和活化能。此外，还优化了CAT-2催化剂的氧化条件。在氧化催化剂CAT-2和吸附剂AD-1的氧化-吸附脱硫中，模拟汽油的硫含量由15ppm降至0.10ppm。在氧化催化剂CAT-1和吸附剂AD-1的氧化-吸附脱硫中，工业煤油的硫含量由6.0ppm降至0.05ppm以下。

The aim of this project is to develop a novel oxidation desulfurization process using a combination of oxidation-adsorption. This process will operate under atmospheric pressure and at the temperature below 100℃. A series of oxidation catalysts were prepared. The catalytic activities of the catalysts were evaluated in the oxidation of a stimulant gasoline, which contains thiophene(T), alkyl-thiophenes and benzothiophene (BT) in decalin or isooctane, using a flow fixed-bed reaction system. The Mo-based catalysts showed higher activities. The reactivities of various sulfur compounds are as follows : BT>2,3,5Trimethylthiophene>2-methylthiophene>2,5-Dimethylthiphene>T. Further, the oxidation of all the sulfur compounds in the stimulant gasoline was fit using first-order reaction. The oxidation rate constants and the activation energies were estimated. Moreover, oxidation conditions using CAT-2 catalyst were optimized. In the oxidation-adsorption desulfurization using oxidation catalyst CAT-2 and adsorbent AD-1, the sulfur content in a stimulant gasoline decreased from 15 ppm to 0.10ppm. In the oxidation-adsorption desulfurization using oxidation catalyst CAT-1 and adsorbent AD-1, the sulfur content in a commercial kerosene decreased from 6.0ppm to less than 0.05ppm.