Catalytic Fast Pyrolysis of Lignin Isolated by Hybrid Organosolv—Steam Explosion Pretreatment of Hardwood and Softwood Biomass for the Production of Phenolics and Aromatics

Document identifier: oai:DiVA.org:ltu-76789
Access full text here:10.3390/catal9110935
Keyword: Engineering and Technology, Industrial Biotechnology, Bioprocess Technology, Teknik och teknologier, Industriell bioteknik, Bioprocessteknik, Spruce and birch wood lignin, Hybrid organosolv—steam explosion pretreatment, Catalytic fast pyrolysis, Model compounds, Bio-oil, Phenolics and aromatics, Microporous and hierarchical ZSM-5 zeolite, Biokemisk processteknik, Biochemical Process Engineering
Publication year: 2019
Relevant Sustainable Development Goals (SDGs):
SDG 7 Affordable and clean energy
The SDG label(s) above have been assigned by OSDG.ai

Abstract:

Lignin, one of the three main structural biopolymers of lignocellulosic biomass, is the most abundant natural source of aromatics with a great valorization potential towards the production of fuels, chemicals, and polymers. Although kraft lignin and lignosulphonates, as byproducts of the pulp/paper industry, are available in vast amounts, other types of lignins, such as the organosolv or the hydrolysis lignin, are becoming increasingly important, as they are side-streams of new biorefinery processes aiming at the (bio)catalytic valorization of biomass sugars. Within this context, in this work, we studied the thermal (non-catalytic) and catalytic fast pyrolysis of softwood (spruce) and hardwood (birch) lignins, isolated by a hybrid organosolv–steam explosion biomass pretreatment method in order to investigate the effect of lignin origin/composition on product yields and lignin bio-oil composition. The catalysts studied were conventional microporous ZSM-5 (Zeolite Socony Mobil–5) zeolites and hierarchical ZSM-5 zeolites with intracrystal mesopores (i.e., 9 and 45 nm) or nano-sized ZSM-5 with a high external surface. All ZSM-5 zeolites were active in converting the initially produced via thermal pyrolysis alkoxy-phenols (i.e., of guaiacyl and syringyl/guaiacyl type for spruce and birch lignin, respectively) towards BTX (benzene, toluene, xylene) aromatics, alkyl-phenols and polycyclic aromatic hydrocarbons (PAHs, mainly naphthalenes), with the mesoporous ZSM-5 exhibiting higher dealkoxylation reactivity and being significantly more selective towards mono-aromatics compared to the conventional ZSM-5, for both spruce and birch lignin.

Authors

Ioannis Charisteidis

Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki, Greece
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Polykarpos Lazaridis

Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki, Greece
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Apostolos Fotopoulos

Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki, Greece
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Eleni Pachatouridou

Chemical Process and Energy Resources Institute, Centre for Research and Technology-Hellas (CPERI/CERTH), Thessaloniki, Greece
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Leonidas Matsakas

Luleå tekniska universitet; Kemiteknik
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Ulrika Rova

Luleå tekniska universitet; Kemiteknik
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Paul Christakopoulos

Luleå tekniska universitet; Kemiteknik
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Konstantinos Triantafyllidis

Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki, Greece
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