NDLI: Direct synthesis of dimethyl ether from CO2 hydrogenation over Cu–ZnO–ZrO2/SO42−–ZrO2 hybrid catalysts: effects of sulfur-to-zirconia ratios

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Catalysis Science & Technology Vol - 5 Issue - 3

Catalysis Science & Technology Vol - 5 Issue - 2

Catalysis Science & Technology Vol -4

Catalysis Science & Technology Vol -3

Catalysis Science & Technology Vol -2

Catalysis Science & Technology Vol -1

Direct synthesis of dimethyl ether from CO₂ hydrogenation over Cu–ZnO–ZrO₂/SO₄²⁻–ZrO₂ hybrid catalysts: effects of sulfur-to-zirconia ratios

Content Provider	Royal Society of Chemistry (RSC)
Author	Permsirivanich, Tinnavat Warakulwit, Chompunuch Limtrakul, Jumras Kanjanasoontorn, Nawapon Faungnawakij, Kajornsak Chareonpanich, Metta Akkaraphataworn, Chalairat Witoon, Thongthai Seubsai, Anusorn
Copyright Year	2015
Abstract	Sulfated zirconia catalysts were prepared by a direct sulfation method and were admixed with a CuO–ZnO–ZrO2 catalyst for the direct synthesis of DME from CO2 hydrogenation. The effects of sulfur-to-zirconia ratios on the physicochemical properties, activity, selectivity and stability of the catalysts were investigated. The sulfur loading content significantly influenced the structure and surface chemistry of the catalysts. The addition of a small amount of sulfur (5–15 wt%) created numerous mesopores on the catalyst surface, remarkably enhancing the surface area and total pore volume. However, at high sulfur loading (20–30 wt%), the mesopores tended to merge and form a larger pore. The detailed characterization by FT-IR, XANES and NH3-TPD reveals that the sulfated zirconia with low sulfur content (5–10 wt%) mainly contained weak acid sites and acted as Lewis acids. Increasing the sulfur loading (15–30 wt%) resulted in the formation of Brønsted acid sites, thus increasing the acid strengths. The sulfated zirconia catalyst with 20 wt% sulfur loading achieved a superior DME productivity of 236 gDME kgcat−1 h−1 at a reaction temperature and pressure of 260 °C and 20 MPa. However, after 75 h of a time-on-stream experiment, the sulfated zirconia catalyst lost approximately 16.9% of its initial activity while a commercial H-ZSM-5 catalyst was more stable as only a 2.85% reduction was observed.
Starting Page	2347
Ending Page	2357
Page Count	11
File Format	HTM / HTML PDF
ISSN	20444753
Volume Number	5
Issue Number	4
Journal	Catalysis Science & Technology
DOI	10.1039/c4cy01568a
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Ammonia Acid Dimethyl ether X-ray absorption near edge structure Lewis Surface science Fourier-transform infrared spectroscopy Zirconium dioxide Sulfur Hydrogenation Sulfation
Content Type	Text
Resource Type	Article
Subject	Catalysis

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Direct synthesis of dimethyl ether from CO2 hydrogenation over Cu–ZnO–ZrO2/SO42−–ZrO2 hybrid catalysts: effects of sulfur-to-zirconia ratios

Improved three-way catalytic activity of bimetallic Ir–Rh catalysts supported on CeO₂–ZrO₂

One Step Dimethyl Ether (DME) Synthesis from CO2 Hydrogenation over Hybrid Catalysts Containing Cu/ZnO/Al2O3 and Nano-Sized Hollow ZSM-5 Zeolites

CO2 hydrogenation to methanol and hydrocarbons over bifunctional Zn-doped ZrO2/zeolite catalysts

Synthesis of DME by CO2 hydrogenation over La2O3-modified CuO-ZnO-ZrO2/HZSM-5 catalysts

Hydrogenation of tetralin over Pt catalysts supported on sulfated zirconia and amorphous silica alumina

Physico-Chemical Modifications Affecting the Activity and Stability of Cu-Based Hybrid Catalysts during the Direct Hydrogenation of Carbon Dioxide into Dimethyl-Ether.

Synthesis of Dimethyl Ether over Modified H-Mordenite Zeolites and Bifunctional Catalysts Composed of Cu/ZnO/ZrO2 and Modified H-Mordenite Zeolite in Slurry Phase

Nano magnetic sulfated zirconia (Fe₃O₄@ZrO₂/SO₄²⁻): an efficient solid acid catalyst for the green synthesis of α-aminonitriles and imines

Direct synthesis of dimethyl ether from CO₂ hydrogenation over Cu–ZnO–ZrO₂/SO₄²⁻–ZrO₂ hybrid catalysts: effects of sulfur-to-zirconia ratios

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