Gasification of Organosolv-lignin Over Charcoal Supported Noble Metal Salt Catalysts in Supercritical Water

Yamaguchi, Aritomo; Hiyoshi, Norihito; Sato, Osamu; Shirai, Masayuki

doi:10.1007/s11244-012-9857-4

Cited by 26 publications

(6 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Gasification of lignin produces synthesis gas (syngas) which is a mixture of hydrogen and carbon monoxide. − The synthesis gas can then be converted into liquid fuels by two different commercial processes: Fischer–Tropsch synthesis or methanol/dimethyl ether synthesis . Several reports in the literature use supercritical water (374 °C, 218 atm) for gasification of lignin. ,− In terms of thermal efficiency, this process offers the advantage of eliminating the need to dry the biomass, which is especially important for lignin with high moisture content. Four main processing units are needed for the above two routes: a lignin material gasifier, a gas cleanup unit, a water–gas shift reactor in certain cases to produce hydrogen with the coformation of carbon dioxide, and finally a syngas converter.…”

Section: Other Depolymerization Processmentioning

confidence: 99%

Catalytic Transformation of Lignin for the Production of Chemicals and Fuels

et al. 2015

View full text Add to dashboard Cite

show abstract

Section: Other Depolymerization Processmentioning

confidence: 99%

Catalytic Transformation of Lignin for the Production of Chemicals and Fuels

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Nevertheless, compared with homogeneous alkali catalysis [242], heterogeneous catalysts based on transition and noble metals have advantages. Ni-Co/Mg-Al catalysts have been evaluated and have demonstrated high flexibility and potential for gasification [243], while noble metals showed higher activity for the gasification, following this order: Ru > Rh > Pt > Pd > Ni [244][245][246][247]. All the component technologies needed for the production of biofuels or chemicals through gasification at a biorefinery are either already commercially used or are undergoing pilot-scale demonstrations ( Figure 6) and the corresponding technical and economic models have been developed for the simulation and evaluation of the complete process [248][249][250].…”

Section: Gasificationmentioning

confidence: 99%

Alternatives for Chemical and Biochemical Lignin Valorization: Hot Topics from a Bibliometric Analysis of the Research Published During the 2000–2016 Period

2018

View full text Add to dashboard Cite

A complete bibliometric analysis of the Scopus database was performed to identify the research trends related to lignin valorization from 2000 to 2016. The results from this analysis revealed an exponentially increasing number of publications and a high relevance of interdisciplinary collaboration. The simultaneous valorization of the three main components of lignocellulosic biomass (cellulose, hemicellulose, and lignin) has been revealed as a key aspect and optimal pretreatment is required for the subsequent lignin valorization. Research covers the determination of the lignin structure, isolation, and characterization; depolymerization by thermal and thermochemical methods; chemical, biochemical and biological conversion of depolymerized lignin; and lignin applications. Most methods for lignin depolymerization are focused on the selective cleavage of the β-O-4 linkage. Although many depolymerization methods have been developed, depolymerization with sodium hydroxide is the dominant process at industrial scale. Oxidative conversion of lignin is the most used method for the chemical lignin upgrading. Lignin uses can be classified according to its structure into lignin-derived aromatic compounds, lignin-derived carbon materials and lignin-derived polymeric materials. There are many advances in all approaches, but lignin-derived polymeric materials appear as a promising option.

show abstract

“…Comprehensive reviews of catalytic and non-catalytic gasification in HCW are available. , This section gives a brief account for type V gasification that converts organics in subcritical water at temperatures of 350 °C or lower, which results in the formation of CH 4 -rich syngas. According to previous reports, − complete or nearly complete gasification in subcritical water needs heterogeneous catalysts, such as Ni, Ru, Rh, and Pt, supported by ZrO 2 , TiO 2 , or carbon, and therefore, the organics to be gasified should be dissolved in the aqueous medium prior to the catalytic gasification.…”

Section: Type V Gasification With Subcritical Watermentioning

confidence: 99%

Low-Temperature Gasification of Biomass and Lignite: Consideration of Key Thermochemical Phenomena, Rearrangement of Reactions, and Reactor Configuration

et al. 2013

View full text Add to dashboard Cite

This paper discusses gasification of solid fuels, such as biomass and lignite, at temperatures well below 1000 °C, which potentially realizes a loss of chemical energy (LCE) smaller than 10% but encounters difficulty in fast and/or complete solid-to-gas conversion in conventional reactor systems. First, key thermochemical and catalytic phenomena are extracted from complex reactions involved in the gasification. These are interactions between intermediates (i.e., volatiles and char), catalysis of inherent and extraneous metallic species, and very fast steam gasification of nascent char. Second, some ways to control the key phenomena are proposed conceptually together with those to rearrange homogeneous/heterogeneous reactions in series/ parallel. Third, implementation of the proposed concepts is discussed assuming different types of gasifiers consisting of a singlefluidized bed, dual-fluidized bed, triple-bed circulating fluidized bed, and/or fixed (moving) bed. The triple-fluidized bed can attain gasification with a LCE as small as 10% by introducing enhancement and/or elimination of the key phenomena and another way to recuperate heat from gas turbine and/or fuel cells (i.e., power generators in gasification combined cycles) into chemical energy of fuel gas. A particular type of fixed-bed gasifier is proposed, which is separated from a pyrolyzer to realize not only control of the key phenomena but also temporal/spatial rearrangement of exothermic and endothermic reactions. This type of gasifier can make a LCE smaller than 4%. Even a conventional single-fluidized bed provides simple and effective gasification, when tar-free/reactive char is used as the fuel instead of parent the one and contributes to a novel integrated gasification fuel cell combined cycles with a theoretical electrical efficiency over 80%.

show abstract

Gasification of Organosolv-lignin Over Charcoal Supported Noble Metal Salt Catalysts in Supercritical Water

Cited by 26 publications

References 22 publications

Catalytic Transformation of Lignin for the Production of Chemicals and Fuels

Catalytic Transformation of Lignin for the Production of Chemicals and Fuels

Alternatives for Chemical and Biochemical Lignin Valorization: Hot Topics from a Bibliometric Analysis of the Research Published During the 2000–2016 Period

Low-Temperature Gasification of Biomass and Lignite: Consideration of Key Thermochemical Phenomena, Rearrangement of Reactions, and Reactor Configuration

Contact Info

Product

Resources

About