Efficient depolymerization of lignins to alkylphenols using phosphided NiMo catalysts

Jessi Osorio Velasco,Hero J Heeres,Ilse Van Der Linden,Peter J Deuss

doi:10.1039/d1cy00588j

Jessi Osorio Velasco, Hero J Heeres + Show 2 more

Open Access

https://doi.org/10.1039/d1cy00588j

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Abstract

A series of phosphided NiMo catalysts on different supports was tested for the catalytic hydrotreatment of lignins to biobased building blocks like alkylphenols.

Highlights

Energy, transportation fuels, and chemicals obtained from fossil resources play an important role in our society
GC-MS analyses of the lignin oils were performed using a Hewlett Packard 5973 MSX attached to a Hewlett Packard 6890 GC equipped with a Restek Rxi-5Sil MS column (30 m × 0.25 mm × 0.25 μm), the injection volume was 1 μl and the injector temperature was set to 280 °C
The catalysts were reduced in an H2 atmosphere at 650 °C and passivated in an O2/Ar mixture at room temperature

Summary

Introduction

Transportation fuels, and chemicals obtained from fossil resources play an important role in our society. There is doubt about the stability of such catalysts when using sulfur-rich feeds like Kraft lignins.[13] Sulfided NiMo and CoMo catalysts, often supported on Al2O3, are well-known hydrotreatment catalysts and are commonly used in the oil industry for hydrodesulfurization.[14,15,16,17] They have been tested for the catalytic hydrotreatment for Kraft lignin as sulfur tolerant catalysts and monomer yields of 26% were obtained (Table 1, entry 2) using sulfided NiMo/MgO–La2O3 catalyst at 350 °C during 4 h of reaction time and 100 bar of initial H2 pressure. Electron micrographs were recorded at a working distance of 8.8–9.3 mm at a scanning voltage of 10 kV

C H N S β-O-4 β–β β-5

Results and discussion

Conclusions