Research On The Preparation And Catalytic Performance Of Rare Earth Modified Mo₂C Loaded SAPO-11 Catalyst

With the deepening process of industrialization, environmental problems have become more serious, people’s awareness of environmental protection gradually increase. Petroleum refining industry began to pay their attention to energy conservation, environmental protection, and efficient. In alkanes isomerization reaction, catalyst with SAPO-11 molecular sieve as a carrier have no pollution, high efficiency. Therefore, further study on SAPO-11 molecular sieve catalyst carrier is needed. Recently the applications of catalyst in treating catalytic cracking, catalytic hydrogenation, alkane isomerization, isomerization dewaxing has got a success. But we did not do enough, for example, the control factors in synthesis of SAPO-11 molecular sieves is still need to study, Optional loading species is narrow, strict requirement on sulfur content, etc.Therefore, further study of the molecular sieve still needs.In this paper, heptane isomerization catalyst were prepared which SAPO-11 used as the carrier. In the metal-function of acid catalyst,the matching of acid center and metal bits is an important factor. Based on this theory, first, Mo2C who provide metal site was loaded on molecular sieve, the influences of impregnation increment, calcination temperature, and the loading process on n-heptane isomerization reaction; n-heptane isomerization conversion and selectivity can reach 20.34% and 30.45% respectively.Second, consider improving acidity, enable to reach metal function matching. Mo2C-La/SAPO-11and Mo2C-Ce/SAPO-11 catalyst were prepared, The catalyst preparation conditions and the influence of reaction conditions on the catalytic performance were studied. N-heptane isomerization conversion and selectivity of Mo2C-La/SAPO-11 can reach 42.72% and 62.03% respectively. For Mo2C-Ce/SAPO-11, n-heptane isomerization conversion and selectivity can reach 49.32% and 57.64%.