Efficient and controllable alcoholysis of Kraft lignin catalyzed by porous zeolite-supported nickel-copper catalyst

Kong, Lingdong; Liu, Chunze; Gao, Jian; Wang, Yuanyuan; Dai, Liyi

doi:10.1016/j.biortech.2019.01.015

Cited by 71 publications

(41 citation statements)

References 31 publications

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“…The linear MIK was likely obtained mainly due to the acetone through an aldol condensation reaction. Similar results were observed by Kong et al during Kraft lignin catalytic hydrodeoxygenation over some nickel‐based zeolite catalysts in a batch reactor system, [ 32 ] and Zhang et al during acetone HDO with NiMo carbide supported on SiO 2 in a fixed bed continuous reactor. [ 23 ] These results illustrated that there are few limitations on the hydrogenation step from acetone to MIK, but a strong thermodynamic equilibrium limitation of further condensation of MIK and acetone to aromatic hydrocarbons.…”

Section: Resultssupporting

confidence: 85%

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Catalytic upgrading of bio‐oil: Hydrodeoxygenation study of acetone as molecule model of ketones

et al. 2020

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The complexity of composition of bio‐oil from biomass makes it difficult to produce upgraded bio‐oil via hydrodeoxygenation. In this paper, acetone is thus considered as a model compound of the ketones family abundant in pyrolysis bio‐oil. Results showed that high conversion rates of acetone between 86.6% and 91.9% were observed with the use of HZSM‐5, 5% Ni2P/HZSM‐5, and 10% Ni2P/HZSM‐5 catalysts. In most cases, CO2, C2H6, C3H6, and C3H8 were the dominant non‐condensable gas products. For liquid phase, the selectivity was evaluated for different catalysts relative to ethanol, acetaldehyde, and aromatic hydrocarbons. A lower temperature favoured the formation of acetaldehyde and methyl isobutyl ketone with the 5% Ni2P/HZSM‐5 catalyst, while higher temperatures increased the proportion of aromatic hydrocarbons. The principal influencing parameters of acetone HDO were temperature and contact time followed by reaction pressure and H2 partial pressure. Optimal conditions give a selectivity of 49% of aromatics (benzene, toluene, and xylene) with the use of the 5% Ni2P/HZSM‐5 catalyst. The pathway of the main reactions of acetone HDO was also proposed. MIK and aromatic hydrocarbons were formed by a multiple step aldol condensation reaction of acetone molecules followed by further hydrogenation.

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Section: Resultssupporting

confidence: 85%

“…These pathways involve several basic reaction intermediates. [ 23,24,32,37,38 ] Reaction (1) corresponds to the demethylation of acetone to AA, together with the formation of CH 4 . Notably, AA is a primary product of acetone HDO.…”

Section: Proposed Reaction Pathways Of Acetone Hdomentioning

confidence: 99%

Catalytic upgrading of bio‐oil: Hydrodeoxygenation study of acetone as molecule model of ketones

et al. 2020

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“…Interestingly, a large number of aromatics (26 vol%) was detected. It was also clearly observed that oxygenate (1.5%) components were among the products from our experiment and the result obtained was rather similar to the products yield reported by Kong and coworkers on their use of nickel-copper catalyst for alcoholysis of Kraft lignin [86]. Hence, adequate aromatics content in the products boosted the octane number thereby blending with reformate (RON = 95) was not necessary in this case.…”

Section: Case III (Hdo Using Ru/c As Catalyst)supporting

confidence: 90%

Economic feasibility of gasoline production from lignocellulosic wastes in Hong Kong

Guan

Chua²,

Tsang³

et al. 2019

BMC Chem Eng

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In this study, the conceptual process flowsheet was developed and the economic feasibility of woody biomass conversion to biofuel as feedstock was analysed by considering several promising experimental processes for lignin depolymerization, such as hydrodeoxygenation and hydrogenolysis, along with lignocellulosic biomass fractionation processes. The engineering simulation process toward the commercial production of bio-gasoline from lignocellulosic biomass using SuperPro Designer® was modeled. The compatibility of the end products with the current gasoline specifications was evaluated and various blending options were investigated to meet the octane number and Reid vapor pressure requirement of the product. The economic potential of the simulated engineering process was then evaluated from an economic perspective. The operating costs and capital investment of three scenario using three different catalytic systems were estimated and discussed to assess of the potential of commercializing of woody biomass valorization process. The main potential market segments were identified, including the process by-products such as xylose and cellulose pulp. From the economic evaluation study, it was found that selling the biomass fractionation products alone does have a greater profit than valorization of lignin to produce bio-gasoline, with net present value of RMB 22,653,000 and RMB 177,000, respectively at the same return on investment if the plant is set up in Hong Kong. It was also found that catalysts play a pivotal role in determination of the profitability in the valorization process, not only because of the price of the catalyst, but also the product distributions obtained with various types of it. To obtain the same gross profit, the sale price of biogasoline has to be set higher with platinum catalysts than with ruthenium catalysts (nearly 10 folds). Thus, catalyst development and process improvement are crucial in the establishment of bio-based circular economy.

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“…Isopropanol is widely acknowledged for the catalytic transfer hydrogenolysis (CTH) of lignin . CTH of lignin was employed to valorize the lignin‐enriched residues from the ionic liquid (IL) pretreatment by Kim et al .…”

Section: Conventional Approach – Catalytic Depolymerization Of Technimentioning

confidence: 99%

Recent Advances in the Catalytic Depolymerization of Lignin towards Phenolic Chemicals: A Review

et al. 2020

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The efficient valorization of lignin could dictate the success of the 2nd generation biorefinery. Lignin, accounting for on average a third of the lignocellulosic biomass, is the most promising candidate for sustainable production of value‐added phenolics. However, the structural alteration induced during lignin isolation is often depleting its potential for value‐added chemicals. Recently, catalytic reductive depolymerization of lignin has appeared to be a promising and effective method for its valorization to obtain phenolic monomers. The present study systematically summarizes the far‐reaching and state‐of‐the‐art lignin valorization strategies during different stages, including conventional catalytic depolymerization of technical lignin, emerging reductive catalytic fractionation of protolignin, stabilization strategies to inhibit the undesired condensation reactions, and further catalytic upgrading of lignin‐derived monomers. Finally, the potential challenges for the future researches on the efficient valorization of lignin and possible solutions are proposed.

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Efficient and controllable alcoholysis of Kraft lignin catalyzed by porous zeolite-supported nickel-copper catalyst

Cited by 71 publications

References 31 publications

Catalytic upgrading of bio‐oil: Hydrodeoxygenation study of acetone as molecule model of ketones

Catalytic upgrading of bio‐oil: Hydrodeoxygenation study of acetone as molecule model of ketones

Economic feasibility of gasoline production from lignocellulosic wastes in Hong Kong

Recent Advances in the Catalytic Depolymerization of Lignin towards Phenolic Chemicals: A Review

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