非负载型NiMoW催化剂催化萘一步加氢合成十氢萘

采用XRD、HRTEM方法对高活性硫化态非负载型NiMoW催化剂进行表征，并在连续流动高压加氢微反装置上对该非负载型NiMoW催化剂催化萘一步加氢合成十氢萘进行研究。XRD、HRTEM结果表明，高活性硫化态非负载型NiMoW催化剂具有明显的Ni3S2、MoS2/WS2特征衍射峰，MoS2/WS2片晶长度5～10nm，堆垛层数3～5层，均高于负载型参比催化剂。萘加氢合成十氢萘的实验结果表明，在反应温度240℃、压力6.0MPa、液时体积空速1.0 h-1的条件下，萘的转化率可达到100%，十氢萘的选择性为99.1%，高于参比催化剂十氢萘的选择性约54.1百分点；反应温度、压力的提高及空速的降低，有利于萘的转化及十氢萘的合成。

SYNTHESIS OF DECALIN BY ONE STEP HYDROGENATION OF NAPHTHALENE ON UNSUPPORTED NiMoW CATALYST

The synthesis of decalin by hydrogenation of naphthalene was studied using sulfided unsupported NiMoW catalyst in a continuous flow high-pressure micro-reactor. The catalyst was characterized by XRD and HRTEM. The characterization results show that the characteristic peaks of Ni3S2 and MoS2/WS2 exist on the sulfided unsupported NiMoW catalyst and the length of MoS2/WS2 crystal is about 5-10 nm with 3-5 stacking layers, while the crystal of reference supported NiMoW catalyst is 3-5nm long and 1-3 layers, respectively. The conversion of naphthalene is 100% and the selectivity of decalin is 99.1% on the sulfided unsupported NiMoW catalyst under the conditions of 240℃, 6.0MPa, Sv 1.0h-1, and the selectivity of decalin on reference catalyst is only 46%. It is revealed that the conversion of naphthalene and yield of decalin increase with the increase of temperature and pressure and with the decrease of liquid hourly space velocity (LHSV) on the sulfided unsupported NiMoW catalyst.