CAJ | 학술논문

采用低温热解次磷酸盐法制备了Ni2 P-L、Pr-Ni2 P-L和Ce-Ni2 P-L催化剂，并采用XRD、H2-TPR、BET、CO吸附、XPS等手段对制备得到的催化剂进行了表征。以二苯并噻吩( DBT)为模型化合物，研究了Pr、Ce稀土元素对低温还原法制备的Ni2 P-L催化剂加氢脱硫( HDS)性能的影响。结果表明，催化剂添加稀土Pr和Ce能够抑制Ni5 P4和其他杂晶的生成，从而促进活性相Ni2 P的生成；添加稀土能提高催化剂对联苯( BP)的选择性，但催化剂的总HDS活性略有降低。
채용저온열해차린산염법제비료Ni2 P-L、Pr-Ni2 P-L화Ce-Ni2 P-L최화제，병채용XRD、H2-TPR、BET、CO흡부、XPS등수단대제비득도적최화제진행료표정。이이분병새분( DBT)위모형화합물，연구료Pr、Ce희토원소대저온환원법제비적Ni2 P-L최화제가경탈류( HDS)성능적영향。결과표명，최화제첨가희토Pr화Ce능구억제Ni5 P4화기타잡정적생성，종이촉진활성상Ni2 P적생성；첨가희토능제고최화제대련분( BP)적선택성，단최화제적총HDS활성략유강저。
The Ni2 P-L, Pr-Ni2 P-L and Ce-Ni2 P-L catalysts were prepared by thermal decomposition of hypophosphites and reduced at low temperature; they were characterized by X-ray diffraction ( XRD ) , temperature programmed reduction with hydrogen ( H2-TPR) , nitrogen physisorption, CO adsorption, and X-ray photoelectron spectroscopy ( XPS) . The effect of the rare earth praseodymium ( Pr) or cerium ( Ce) elements on the activity of Ni2 P-L catalyst in hydrodesulfurization ( HDS) was investigated with dibenzothiophene ( DBT) as a model compound. The results indicated that the addition of Pr and Ce can suppress the formation of Ni5 P4 and other mixed crystal phases and then promote the formation of Ni2 P phase. After adding the rare earth metals, the selectivity to BP over the Ni2 P catalyst is enhanced greatly, though the total HDS activity is decreased slightly.