Publication

Effect of potassium promoter on Fischer-Tropsch synthesis to light olefins over iron carbide catalysts encapsulated in graphene-like carbon

Tian, Z., Wang, C., Yue, J., Zhang, X. & Ma, L., 7-Jun-2019, In : Catalysis Science & Technology. 9, 11, p. 2728-2741 14 p.

Research output: Contribution to journalArticleAcademicpeer-review

APA

Tian, Z., Wang, C., Yue, J., Zhang , X., & Ma, L. (2019). Effect of potassium promoter on Fischer-Tropsch synthesis to light olefins over iron carbide catalysts encapsulated in graphene-like carbon. Catalysis Science & Technology, 9(11), 2728-2741. https://doi.org/10.1039/C9CY00403C

Author

Tian, Zhipeng ; Wang, Chengguan ; Yue, Jun ; Zhang , Xinghua ; Ma, Longlong. / Effect of potassium promoter on Fischer-Tropsch synthesis to light olefins over iron carbide catalysts encapsulated in graphene-like carbon. In: Catalysis Science & Technology. 2019 ; Vol. 9, No. 11. pp. 2728-2741.

Harvard

Tian, Z, Wang, C, Yue, J, Zhang , X & Ma, L 2019, 'Effect of potassium promoter on Fischer-Tropsch synthesis to light olefins over iron carbide catalysts encapsulated in graphene-like carbon', Catalysis Science & Technology, vol. 9, no. 11, pp. 2728-2741. https://doi.org/10.1039/C9CY00403C

Standard

Effect of potassium promoter on Fischer-Tropsch synthesis to light olefins over iron carbide catalysts encapsulated in graphene-like carbon. / Tian, Zhipeng; Wang, Chengguan; Yue, Jun; Zhang , Xinghua; Ma, Longlong.

In: Catalysis Science & Technology, Vol. 9, No. 11, 07.06.2019, p. 2728-2741.

Research output: Contribution to journalArticleAcademicpeer-review

Vancouver

Tian Z, Wang C, Yue J, Zhang X, Ma L. Effect of potassium promoter on Fischer-Tropsch synthesis to light olefins over iron carbide catalysts encapsulated in graphene-like carbon. Catalysis Science & Technology. 2019 Jun 7;9(11):2728-2741. https://doi.org/10.1039/C9CY00403C


BibTeX

@article{3c97d781e7f2480ea12f300860588a5c,
title = "Effect of potassium promoter on Fischer-Tropsch synthesis to light olefins over iron carbide catalysts encapsulated in graphene-like carbon",
abstract = "Iron carbide catalysts encapsulated in graphene-like carbon were synthesized via a facile method by pyrolysis of iron-glucose precursor. Different amounts of potassium (0-5 wt%) were in situ doped into the catalyst simultaneously. Glucose played a role both as the precursor to form a carbon support and a reducing agent that reduced iron oxides to θ-Fe3C during the catalyst preparation. θ-Fe3C underwent a phase transformation to χ-Fe5C2 as the active phase in Fischer-Tropsch synthesis. Characterization of structural and chemical properties of the prepared catalysts revealed a core-shell structure with iron carbides enwrapped by several layers of graphene. The addition of potassium increased the amount of defects on graphene layers and facilitated the formation of iron carbides during the catalyst preparation. Fischer-Tropsch synthesis under typical reaction conditions (320 oC, 20 bar, H2/CO=1, GHSV=15000 ml·gcat-1·h-1) was carried out in a fixed bed reactor. Higher light olefins selectivity was obtained than that on the common iron catalysts, probably because of the electron-rich surfaces of the prepared catalysts that made hydrogen hard to hydrogenate the unsaturated intermediates. A volcano-like evolution of light olefins selectivity was observed on the catalysts with different contents of K, and the highest olefins selectivity reached 41.9% on 2K-Fe3C@C catalyst (i.e., doped with 2 wt% of K). The induction period of the catalyst was shortened by K addition. No drastic changes in the catalyst morphology and performance during 100 h time on stream can be ascribed to the protection of graphene layers that prevented the supported iron particles from migration and aggregation under harsh conditions in Fischer-Tropsch synthesis.",
keywords = "ACTIVATED-CARBON, NANOPARTICLES, NANOTUBES, SUPPORT, HYDROCARBONS, REDUCTION, SURFACE, SYNGAS, GAS, FABRICATION",
author = "Zhipeng Tian and Chengguan Wang and Jun Yue and Xinghua Zhang and Longlong Ma",
year = "2019",
month = jun,
day = "7",
doi = "10.1039/C9CY00403C",
language = "English",
volume = "9",
pages = "2728--2741",
journal = "Catalysis Science & Technology",
issn = "2044-4753",
publisher = "ROYAL SOC CHEMISTRY",
number = "11",

}

RIS

TY - JOUR

T1 - Effect of potassium promoter on Fischer-Tropsch synthesis to light olefins over iron carbide catalysts encapsulated in graphene-like carbon

AU - Tian, Zhipeng

AU - Wang, Chengguan

AU - Yue, Jun

AU - Zhang , Xinghua

AU - Ma, Longlong

PY - 2019/6/7

Y1 - 2019/6/7

N2 - Iron carbide catalysts encapsulated in graphene-like carbon were synthesized via a facile method by pyrolysis of iron-glucose precursor. Different amounts of potassium (0-5 wt%) were in situ doped into the catalyst simultaneously. Glucose played a role both as the precursor to form a carbon support and a reducing agent that reduced iron oxides to θ-Fe3C during the catalyst preparation. θ-Fe3C underwent a phase transformation to χ-Fe5C2 as the active phase in Fischer-Tropsch synthesis. Characterization of structural and chemical properties of the prepared catalysts revealed a core-shell structure with iron carbides enwrapped by several layers of graphene. The addition of potassium increased the amount of defects on graphene layers and facilitated the formation of iron carbides during the catalyst preparation. Fischer-Tropsch synthesis under typical reaction conditions (320 oC, 20 bar, H2/CO=1, GHSV=15000 ml·gcat-1·h-1) was carried out in a fixed bed reactor. Higher light olefins selectivity was obtained than that on the common iron catalysts, probably because of the electron-rich surfaces of the prepared catalysts that made hydrogen hard to hydrogenate the unsaturated intermediates. A volcano-like evolution of light olefins selectivity was observed on the catalysts with different contents of K, and the highest olefins selectivity reached 41.9% on 2K-Fe3C@C catalyst (i.e., doped with 2 wt% of K). The induction period of the catalyst was shortened by K addition. No drastic changes in the catalyst morphology and performance during 100 h time on stream can be ascribed to the protection of graphene layers that prevented the supported iron particles from migration and aggregation under harsh conditions in Fischer-Tropsch synthesis.

AB - Iron carbide catalysts encapsulated in graphene-like carbon were synthesized via a facile method by pyrolysis of iron-glucose precursor. Different amounts of potassium (0-5 wt%) were in situ doped into the catalyst simultaneously. Glucose played a role both as the precursor to form a carbon support and a reducing agent that reduced iron oxides to θ-Fe3C during the catalyst preparation. θ-Fe3C underwent a phase transformation to χ-Fe5C2 as the active phase in Fischer-Tropsch synthesis. Characterization of structural and chemical properties of the prepared catalysts revealed a core-shell structure with iron carbides enwrapped by several layers of graphene. The addition of potassium increased the amount of defects on graphene layers and facilitated the formation of iron carbides during the catalyst preparation. Fischer-Tropsch synthesis under typical reaction conditions (320 oC, 20 bar, H2/CO=1, GHSV=15000 ml·gcat-1·h-1) was carried out in a fixed bed reactor. Higher light olefins selectivity was obtained than that on the common iron catalysts, probably because of the electron-rich surfaces of the prepared catalysts that made hydrogen hard to hydrogenate the unsaturated intermediates. A volcano-like evolution of light olefins selectivity was observed on the catalysts with different contents of K, and the highest olefins selectivity reached 41.9% on 2K-Fe3C@C catalyst (i.e., doped with 2 wt% of K). The induction period of the catalyst was shortened by K addition. No drastic changes in the catalyst morphology and performance during 100 h time on stream can be ascribed to the protection of graphene layers that prevented the supported iron particles from migration and aggregation under harsh conditions in Fischer-Tropsch synthesis.

KW - ACTIVATED-CARBON

KW - NANOPARTICLES

KW - NANOTUBES

KW - SUPPORT

KW - HYDROCARBONS

KW - REDUCTION

KW - SURFACE

KW - SYNGAS

KW - GAS

KW - FABRICATION

U2 - 10.1039/C9CY00403C

DO - 10.1039/C9CY00403C

M3 - Article

VL - 9

SP - 2728

EP - 2741

JO - Catalysis Science & Technology

JF - Catalysis Science & Technology

SN - 2044-4753

IS - 11

ER -

ID: 80822288