Catalytic hydrodeoxygenation of guaiacol over platinum supported on metal oxides and zeolites

Hellinger, Melanie; Carvalho, Hudson Wallace Pereira de; Baier, Sina; Wang, Di; Kleist, Wolfgang; Grunwaldt, Jan‐Dierk

doi:10.1016/j.apcata.2014.10.043

Cited by 121 publications

(75 citation statements)

References 66 publications

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“…% Ni loading was determined to be selected as proper metal loading for the following tests (Table S2). The results coincide well with the hydrogenolysis mechanism on noble metal catalysts that comprise the hydrogenation saturation of a benzene ring preferentially and the HDO of oxygenates after hydrogenation in the successive step [22,28] (Scheme 1). The main products of low temperature hydrogenation below 200 • C were methoxycyclohexanol, apart from a small amount of cyclohexanol, methoxycyclohexane, and cyclohexane.…”

Section: Guaiacol Hydrogenolysis Activity Of Prepared Catalystssupporting

confidence: 62%

“…As illustrated in Figure 3 and Table S1, H 2 temperature-programmed reduction (H 2 -TPR) experiments were performed to analyze the reducibility and reduction degrees of the Ni-based catalysts. The H 2 consumption peak around 300-400 • C was associated with the reduction of bulk nickel oxide [5,[28][29][30]. On the other hand, the reduction peak at higher temperatures (>500 • C) could be related to the reduction of nickel oxide species, which strongly interacted with the support and appeared to be difficult to reduce [4,5,31,32].…”

Section: Catalyst Characterizationmentioning

confidence: 97%

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Efficient Hydrogenolysis of Guaiacol over Highly Dispersed Ni/MCM-41 Catalyst Combined with HZSM-5

Qiu

Weng

et al. 2016

Catalysts

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Abstract:A series of MCM-41 supported Ni catalysts with high metal dispersion was successfully synthesized by simple co-impregnation using proper ethylene glycol (EG). The acquired Ni-based catalysts performed the outstanding hydrogenolysis activity of guaiacol. The effects of the synthesis parameters including drying temperature, calcination temperature, and metal loading on the physical properties of NiO nanoparticles were investigated through the use of X-ray diffraction (XRD). The drying temperature was found to significantly influence the particle sizes of NiO supported on MCM-41, but the calcination temperature and metal loading had less influence. Interestingly, the small particle size (≤3.3 nm) and the high dispersion of NiO particles were also obtained for co-impregnation on the mixed support (MCM-41:HZSM-5 = 1:1), similar to that on the single MCM-41 support, leading to excellent hydrogenation activity at low temperature. The guaiacol conversion could reach 97.9% at 150 • C, and the catalytic activity was comparative with that of noble metal catalysts. The hydrodeoxygenation (HDO) performance was also promoted by the introduction of acidic HZSM-5 zeolite and an 84.1% yield of cyclohexane at 240 • C was achieved. These findings demonstrate potential applications for the future in promoting and improving industrial catalyst performance.

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Section: Guaiacol Hydrogenolysis Activity Of Prepared Catalystssupporting

confidence: 62%

Section: Catalyst Characterizationmentioning

confidence: 97%

Efficient Hydrogenolysis of Guaiacol over Highly Dispersed Ni/MCM-41 Catalyst Combined with HZSM-5

Qiu

Weng

et al. 2016

Catalysts

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“…The influence of the support on the activity of a noble-metal-based catalyst in the hydrodeoxygenation of guaiacol was also confirmed by Hellinger et al [62]. It was demonstrated that acidic supports of Pt, such as H-MFI (mobil five) zeolites, provided the highest activity, while the order of the reactivity of metal oxide supports was Pt/SiO 2 > Pt/Al 2 O 3 ≈ Pt/ZrO 2 > Pt/TiO 2 .…”

Section: Bio-oil Upgrading Via Hydrodeoxygenation (Hdo)supporting

confidence: 55%

“…Besides the investigations focused on the hydrodeoxygenation of the pyrolysis oil originated from real biomass samples, a large group of studies is devoted to the HDO of model substrates, such as phenolic compounds [59][60][61][62], acetone [63], anisole [64], levulinic acid [65], and angelica lactone [66]. The presented results emphasize the importance of the use of catalyst.…”

Section: Bio-oil Upgrading Via Hydrodeoxygenation (Hdo)mentioning

confidence: 99%

Development of Heterogeneous Catalysts for Thermo-Chemical Conversion of Lignocellulosic Biomass

Grams

Ruppert

2017

Energies

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Lignocellulosic biomass is one of the most attractive renewable resources that can be used for the production of biofuels and valuable chemicals. However, problems associated with the low efficiency of its conversion and poor selectivity to desired products remain. Therefore, in recent years researchers have focused on the design of highly active and stable catalysts, enabling an increase in the effectiveness of lignocellulosic biomass processing. This work is devoted to the presentation of the latest trends in the studies of the heterogeneous catalysts used in thermo-chemical conversion of such feedstock. The systems applied for the production of both bio-oil and hydrogen-rich gas are discussed. Zeolites, mesoporous materials, metal oxides, supported metal catalysts, and modifications of their structure are described. Moreover, the impact of the physicochemical properties of the presented catalyst on their catalytic performance in the mentioned processes is demonstrated.

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“…In a recent screening work, we extended this approach and studied the conversion of guaiacol over several supported platinum catalysts in batch operation under mild conditions. Among those, Pt/SiO2 and Pt/H-MFI-90 appeared most attractive in a temperature range up to 200 °C [30]. In this previous study [30], as well as studies by Faglioni and Goddard [31] and Mortensen et al [32], hydrogenation followed by dehydration was found to be the preferred pathway at these lower reaction temperatures (T ≤ 250 °C).…”

Section: Introductionmentioning

confidence: 86%

Continuous Catalytic Hydrodeoxygenation of Guaiacol over Pt/SiO2 and Pt/H-MFI-90

et al. 2015

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Hydrodeoxygenation of guaiacol in the presence of 1-octanol was studied in a fixed-bed reactor under mild conditions (50-250 °C) over platinum particles supported on silica (Pt/SiO2) and a zeolite with framework type MFI at a Si/Al-ratio of 45 (Pt/H-MFI-90). The deoxygenation selectivity strongly depended on the support and the temperature. Both guaiacol and octanol were rapidly deoxygenated in the presence of hydrogen over Pt/H-MFI-90 at 250 °C to cyclohexane and octane, respectively. In contrast, Pt/SiO2 mostly showed hydrogenation, but hardly any deoxygenation activity. The acidic sites of the MFI-90 support lead to improved deoxygenation performance at the mild temperature conditions of this study. Significant conversions under reaction conditions applied already occurred at temperatures of 200 °C. However, during long-term stability tests, the Pt/H-MFI-90 catalyst deactivated after more than 30 h, probably due to carbon deposition, whereas Pt/SiO2 was more stable. The catalytic activity of the zeolite catalyst could only partly be regained by calcination in air, as some of the acidic sites were lost. OPEN ACCESSCatalysts 2015, 5 1153

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Catalytic hydrodeoxygenation of guaiacol over platinum supported on metal oxides and zeolites

Cited by 121 publications

References 66 publications

Efficient Hydrogenolysis of Guaiacol over Highly Dispersed Ni/MCM-41 Catalyst Combined with HZSM-5

Efficient Hydrogenolysis of Guaiacol over Highly Dispersed Ni/MCM-41 Catalyst Combined with HZSM-5

Development of Heterogeneous Catalysts for Thermo-Chemical Conversion of Lignocellulosic Biomass

Continuous Catalytic Hydrodeoxygenation of Guaiacol over Pt/SiO2 and Pt/H-MFI-90

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