Diffusion-dependent upgrading of hydrocarbons synthesized by Co/zeolite bifunctional Fischer-Tropsch catalysts

被引：12

作者：

Park, Gyungah ^{[1
]}

Ahn, Chiwoong ^{[2
]}

Park, Sunyoung ^{[2
]}

Lee, Yunjo ^{[1
]}

Kwak, Geunjae ^{[1
,3
]}

Kim, Seok Ki ^{[1
,3
]}

机构：

[1] Korea Res Inst Chem Technol KRICT, C1 Gas & Carbon Convergent Res Ctr, POB 107,Gajeongro 141, Yuseong 34114, Daejeon, South Korea

[2] Korea Res Inst Chem Technol KRICT, Ctr Convergent Chem Proc, POB 107,Gajeongro 141, Yuseong 34114, Daejeon, South Korea

[3] Univ Sci & Technol, Adv Mat & Chem Engn, Daejeon 34113, South Korea

来源：

APPLIED CATALYSIS A-GENERAL | 2020年 / 607卷

基金：

新加坡国家研究基金会;

关键词：

Fischer-Tropsch; Bifunctional catalysts; Cobalt; Zeolite; Hydrocarbon upgrading; COBALT PARTICLE-SIZE; LIQUID FUELS; ZEOLITE CATALYSTS; HYBRID CATALYST; ISO-PARAFFINS; ACID STRENGTH; SYNGAS; GAS; HYDROGENATION; IMPREGNATION;

D O I：

10.1016/j.apcata.2020.117840

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The design of efficient zeolite-supported Co catalysts is essential for the further development of the one-step production of liquid fuels via the low-temperature Fischer-Tropsch synthesis (FTS). Herein, Co/zeolite catalysts were prepared from zeolites SSZ-13, ZSM-22, ZSM-11, ZSM-5, Mordenite, and Y. Their textural and acidic properties, Co dispersion, and internal diffusion behaviors were comprehensively analyzed, along with their FTS product mixtures. Counterintuitively, the degree of isomerization and hydrocarbon decomposition did not correlate with the acidic properties of the zeolite support. Instead, catalysts with high characteristic diffusivity delivered product mixtures with high degree of isomerization and decomposition, suggesting that the access of paraffinic hydrocarbons to the internal acid sites of the zeolite determines the upgrading performance of the bifunctional Co/zeolite catalyst in the low-temperature FTS reaction. Hence, the present findings support upcoming efforts on the design of new and effective FTS catalysts.

引用

页数：8

共 52 条

[1] Biomass to liquid transportation fuel via Fischer Tropsch synthesis - Technology review and current scenario [J].