The purification process and side reactions in the N-methylmorpholine-N-oxide (NMMO) recovery system

Guo, Yaoxian; Cai, Jianguo; Sun, Tianqi; Xing, Lin; Cheng, Chuanbing; Chi, Kedong; Xu, Jigang; Li, Ting

doi:10.1007/s10570-021-03929-0

Cited by 9 publications

(5 citation statements)

References 18 publications

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“…In particular, the costs for water evaporation greatly increase when concentrating NMMO from 70 to 86% [ 84 ]. The strong hydrogen bonds between water and NMMO require a further elevation of the evaporating temperature by 30 °C to obtain the 86% NMMO solution [ 84 ], increasing the process costs and the risk for NMMO degradation and side reactions [ 85 ]. Therefore, using the 73% NMMO solution proposed in the present study rather than the most commonly investigated 85% NMMO solution for LRs pretreatment could offset the overall costs of the NMMO pretreatment process.…”

Section: Discussionmentioning

confidence: 99%

“…30 h) NMMO pretreatment compared to that of the present study, and the use of propyl gallate to stabilise the reaction was not reported in that study. Therefore, the failure of reusing the NMMO solution shown by Kabir et al [ 25 ] for forest residues is likely to be due to the solvent degradation caused by side reactions occurring during the pretreatment [ 85 ].…”

Section: Discussionmentioning

confidence: 99%

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Use of N-Methylmorpholine N-oxide (NMMO) pretreatment to enhance the bioconversion of lignocellulosic residues to methane

Oliva

Tan

Papirio

et al. 2022

Biomass Conv. Bioref.

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Lignocellulosic residues (LRs) are one of the most abundant wastes produced worldwide. Nevertheless, unlocking the full energy potential from LRs for biofuel production is limited by their complex structure. This study investigated the effect of N-methylmorpholine N-oxide (NMMO) pretreatment on almond shell (AS), spent coffee grounds (SCG), and hazelnut skin (HS) to improve their bioconversion to methane. The pretreatment was performed using a 73% NMMO solution heated at 120 °C for 1, 3, and 5 h. The baseline methane productions achieved from raw AS, SCG, and HS were 54.7 (± 5.3), 337.4 (± 16.5), and 265.4 (± 10.4) mL CH4/g VS, respectively. The NMMO pretreatment enhanced the methane potential of AS up to 58%, although no changes in chemical composition and external surface were observed after pretreatment. Opposite to this, pretreated SCG showed increased porosity (up to 63%) and a higher sugar percentage (up to 27%) after pretreatment despite failing to increase methane production. All pretreatment conditions were effective on HS, achieving the highest methane production of 400.4 (± 9.5) mL CH4/g VS after 5 h pretreatment. The enhanced methane production was due to the increased sugar percentage (up to 112%), lignin removal (up to 29%), and loss of inhibitory compounds during the pretreatment. An energy assessment revealed that the NMMO pretreatment is an attractive technology to be implemented on an industrial scale for energy recovery from HS residues.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Use of N-Methylmorpholine N-oxide (NMMO) pretreatment to enhance the bioconversion of lignocellulosic residues to methane

Oliva

Tan

Papirio

et al. 2022

Biomass Conv. Bioref.

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“…Everything society produces and consumes leaves residues (waste), which will eventually degrade. 1 This is true for fossil-based synthetic materials as well as for biobased materials. Nevertheless, biobased materials are truly biodegradable, which means they are decomposable.…”

Section: Introductionmentioning

confidence: 99%

“…Sustainability guided by strict environmental regulations has been the focus of future products, which requires more of the deployment of biobased materials. Everything society produces and consumes leaves residues (waste), which will eventually degrade . This is true for fossil-based synthetic materials as well as for biobased materials.…”

Section: Introductionmentioning

confidence: 99%

Structure Formation by 3D-Printing of Cellulose from Cellulose-NMMO-Water Solutions: Analysis of Extrusion, Regeneration, and Drying Stages

Goncalves,

Garces,

Ngo

et al. 2024

Biomacromolecules

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“…The first element is described in detail, e.g. in (White 2001), and the latter by Guo et al (2021). From a plant design perspective, in addition to understanding the basic functions of the process elements, such as making dope, washing the fibre, or evaporating excess water from the dilute solvent, it is crucial to capture the reactions and phase changes of key process compounds.…”

Section: Introductionmentioning

confidence: 99%

Lyocell fibre production using NMMO – A simulation-based techno-economic analysis

Hytönen

Sorsamäki

Kolehmainen

et al. 2023

BioRes

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The demand for man-made cellulosic fibres is expected to grow in the future. One commercially-available concept to supply fibres is Lyocell manufacturing from dissolving wood pulps using N-Methylmorpholine N-oxide (NMMO) as the solvent. The literature qualitatively indicates that NMMO recycling efficiency is a key factor for profitable operation. Process design information and parameter data are however poorly available publicly to illustrate the cost factors. Therefore, systematic techno-economic analysis of a 50 kt/year Lyocell plant was conducted using steady-state process simulation and cost modeling. With the simulation models, the underlying technical process design and modelling decisions, and economic assumptions were studied. NMMO makeup need is an important cost item. The simulated makeup need is very dependent on the design of the solvent recovery system and the vapor-liquid equilibrium thermodynamic model selection. On the other hand, water use, fibre washing process design, and washing model parameterization have relatively lower impact on the cost of production. Raw material cost and capital expenses are most critical cost items when the NMMO recycling efficiency is high.

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The purification process and side reactions in the N-methylmorpholine-N-oxide (NMMO) recovery system

Cited by 9 publications

References 18 publications

Use of N-Methylmorpholine N-oxide (NMMO) pretreatment to enhance the bioconversion of lignocellulosic residues to methane

Use of N-Methylmorpholine N-oxide (NMMO) pretreatment to enhance the bioconversion of lignocellulosic residues to methane

Structure Formation by 3D-Printing of Cellulose from Cellulose-NMMO-Water Solutions: Analysis of Extrusion, Regeneration, and Drying Stages

Lyocell fibre production using NMMO – A simulation-based techno-economic analysis

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