Two-Dimensional Layered Double Hydroxide Derived from Vermiculite Waste Water Supported Highly Dispersed Ni Nanoparticles for CO Methanation

Expanded multilayered vermiculite (VMT) was successfully used as catalyst support and Ni/VMT synthesized by microwave irradiation assisted synthesis (MIAS) exhibited excellent performance in our previous work. We also developed a two-dimensional porous SiO2 nanomesh (2D VMT-SiO2) by mixed-acid etchi...

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Veröffentlicht in:Catalysts 2017-03, Vol.7 (3), p.79
Hauptverfasser: Li, Panpan, Zhu, Mingyuan, Tian, Zhiqun, Han, Yang, Zhang, Yu, Zhou, Tuantuan, Kang, Lihua, Dan, Jianming, Guo, Xuhong, Yu, Feng, Wang, Qiang, Dai, Bin
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container_issue 3
container_start_page 79
container_title Catalysts
container_volume 7
creator Li, Panpan
Zhu, Mingyuan
Tian, Zhiqun
Han, Yang
Zhang, Yu
Zhou, Tuantuan
Kang, Lihua
Dan, Jianming
Guo, Xuhong
Yu, Feng
Wang, Qiang
Dai, Bin
description Expanded multilayered vermiculite (VMT) was successfully used as catalyst support and Ni/VMT synthesized by microwave irradiation assisted synthesis (MIAS) exhibited excellent performance in our previous work. We also developed a two-dimensional porous SiO2 nanomesh (2D VMT-SiO2) by mixed-acid etching of VMT. Compared with three-dimensional (3D) MCM-41, 2D VMT-SiO2 as a catalyst support provided a superior position for implantation of NiO species and the as-obtained catalyst exhibited excellent performance. In this paper, we successfully synthesized a layered double hydroxide (LDH) using the spent liquor after mixed-acid etching of VMT, which mainly contained Mg2+ and Al3+. The as-calcined layered double oxide (LDO) was used as a catalyst support for CO methanation. Compared with Ni/MgAl-LDO, Ni/VMT-LDO had smaller active component particles; therefore, in this study, it exhibited excellent catalytic performance over the whole temperature range of 250–500 °C. Ni/VMT-LDO achieved the best activity with 87.88% CO conversion, 89.97% CH4 selectivity, and 12.47 × 10−2·s−1 turn over frequency (TOF) at 400 °C under a gas hourly space velocity of 20,000 mL/g/h. This study demonstrated that VMT-LDO as a catalyst support provided an efficient way to develop high-performance catalysts for synthetic natural gas (SNG) from syngas.
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We also developed a two-dimensional porous SiO2 nanomesh (2D VMT-SiO2) by mixed-acid etching of VMT. Compared with three-dimensional (3D) MCM-41, 2D VMT-SiO2 as a catalyst support provided a superior position for implantation of NiO species and the as-obtained catalyst exhibited excellent performance. In this paper, we successfully synthesized a layered double hydroxide (LDH) using the spent liquor after mixed-acid etching of VMT, which mainly contained Mg2+ and Al3+. The as-calcined layered double oxide (LDO) was used as a catalyst support for CO methanation. Compared with Ni/MgAl-LDO, Ni/VMT-LDO had smaller active component particles; therefore, in this study, it exhibited excellent catalytic performance over the whole temperature range of 250–500 °C. Ni/VMT-LDO achieved the best activity with 87.88% CO conversion, 89.97% CH4 selectivity, and 12.47 × 10−2·s−1 turn over frequency (TOF) at 400 °C under a gas hourly space velocity of 20,000 mL/g/h. 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This study demonstrated that VMT-LDO as a catalyst support provided an efficient way to develop high-performance catalysts for synthetic natural gas (SNG) from syngas.</abstract><cop>Basel</cop><pub>MDPI AG</pub><doi>10.3390/catal7030079</doi><orcidid>https://orcid.org/0000-0002-1792-8564</orcidid><orcidid>https://orcid.org/0000-0001-6131-9662</orcidid><orcidid>https://orcid.org/0000-0002-8140-8344</orcidid><oa>free_for_read</oa></addata></record>
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source MDPI - Multidisciplinary Digital Publishing Institute; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals
subjects Aluminum
Catalysis
Catalysts
Chemical reactions
Etching
Hydroxides
Implantation
Methanation
Nanoparticles
Selectivity
Silicon dioxide
Spent liquors
Substitute natural gas
Synthesis gas
Vermiculite
Wastewater
title Two-Dimensional Layered Double Hydroxide Derived from Vermiculite Waste Water Supported Highly Dispersed Ni Nanoparticles for CO Methanation
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