Green Chemical Engineering最新文献_第2页

Integrated alkaline and deep eutectic solvent-based green strategy for lignin fractionation and thermochemical valorization 木质素分馏和热化学增值的碱性和深共晶溶剂型综合绿色策略

IF 7.6 Q1 ENGINEERING, CHEMICAL

Green Chemical Engineering

Pub Date : 2026-06-01 Epub Date: 2025-07-09 DOI: 10.1016/j.gce.2025.07.004

Penghui Li , Shubin Wu , Honghong Wang , Yuliang He

In this work, an efficient and green strategy for selective extraction and high-value utilization of lignin was proposed. Most of the hemicellulose in the feedstock was first removed by alkaline pretreatment to create a favorable structural environment for subsequent lignin dissolution. Subsequently, an acid-alcohol deep eutectic solvent (DES) system based on FeCl₃-ethylene glycol (FeCl₃-EG) was developed to achieve efficient and selective lignin dissolution. The results of characterization by Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), and Brunauer-Emmett-Teller (BET) showed that the lignin was removed significantly after the treatment, the cellulose structure was preserved, and the crystallinity and specific surface area were increased to 73.46% and 2.764 m²/g, respectively. The highest delignification rate of 96.53% was achieved when EG:FeCl₃ = 1:0.3. Gas chromatography-mass spectrometry (GC-MS) detected a variety of low molecular phenolic products. In-situ Raman spectroscopy revealed the dynamic process of lignin dissolution from the cell wall. The regenerated lignin was systematically characterized by FTIR, thermogravimetry (TG), elemental analysis, and two-dimensional heteronuclear single quantum coherence-nuclear magnetic resonance (2D HSQC-NMR), and it was found that as the FeCl₃ content in DES increased, the β-O-4 content decreased, and the thermal stability of lignin increased. The pyrolysis properties were further analyzed by in-situ infrared (IR) spectroscopy, pyrolysis gas chromatography-mass spectrometry (Py GC-MS), and U-tube device, which showed that the regenerated lignin pyrolysis products had a high yield of the liquid phase and good phenol selectivity (40.94%), which demonstrated good selectivity and application prospects. This study provides a theoretical basis and process reference for the green extraction of lignin and its platform compound conversion.

本文提出了一种高效、绿色的木质素选择性提取和高价值利用策略。原料中的大部分半纤维素首先通过碱性预处理去除，为随后的木质素溶解创造有利的结构环境。随后，开发了一种基于fecl3 -乙二醇（FeCl3-EG）的酸醇深度共晶溶剂（DES）体系，以实现高效、选择性的木质素溶解。傅里叶变换红外光谱（FT-IR）、x射线衍射（XRD）、BET （bruauer - emmet - teller）表征结果表明，处理后木质素被明显去除，纤维素结构保持不变，结晶度和比表面积分别提高到73.46%和2.764 m2/g。当EG:FeCl3 = 1:0.3时，脱木质素率最高，达96.53%。气相色谱-质谱联用技术（GC-MS）检测了多种低分子酚类产物。原位拉曼光谱揭示了木质素从细胞壁溶解的动态过程。利用FTIR、热重（TG）、元素分析和二维异核单量子相干核磁共振（2D HSQC-NMR）对再生木质素进行了系统表征，发现随着DES中FeCl3含量的增加，β-O-4含量降低，木质素的热稳定性提高。通过原位红外光谱（IR）、热解气相色谱-质谱（Py GC-MS）和u型管装置对其热解特性进行分析，结果表明再生木质素热解产物液相收率高，苯酚选择性好（40.94%），具有良好的选择性和应用前景。本研究为木质素的绿色提取及其平台化合物转化提供了理论依据和工艺参考。

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引用次数: 0

Fluffy LDH/GO 2D membrane for rapid removal of soluble pollutants and enhanced catalytic self-cleaning performance 蓬松的LDH/GO 2D膜，可快速去除可溶性污染物，增强催化自清洁性能

IF 7.6 Q1 ENGINEERING, CHEMICAL

Green Chemical Engineering

Pub Date : 2026-06-01 Epub Date: 2024-10-18 DOI: 10.1016/j.gce.2024.10.004

Ruilong Zhang , Jun Zhao , Qiangqiang Jia , Jian Ye , Xiaohua Tian , Lulu Wang , Ifunanya R. Akaniro , Prince N. Amaniampong , Jianming Pan , Jiangdong Dai

The rapid expansion of the chemical and pharmaceutical industries has resulted in the introduction of various sources of micropollutants into the environment, posing threats to drinking water quality and public health. Membrane separation technology offers a promising solution with low energy use, high-quality effluent, and operational simplicity. Here, we developed fluffy layered double hydroxides (LDH)/graphene oxide (GO) 2D membranes, specifically tannic acid-mediated LDH-GO/GO-TA composite membranes (LG/GT). The integration of GO nanosheets regulated the growth of LDH, enhancing electron transfer and adsorption-driven catalytic performance. This design enabled LDH-GO to activate peroxymonosulfate (PMS) and completely degraded Rhodamine B (RhB) within 10 min. The Gaussian calculation was combined with this finding, which could explain the catalytic self-cleaning in the separation process. The TA-mediated enhancement further increased the RhB rejection of LG/GT-7.5 to 99.23%. Additionally, the needle/sheet structure significantly improved permeance to 358.28 L m⁻² h⁻¹ bar⁻¹, surpassing the L/GT-7.5 performance (e.g. 338.53 L m⁻² h⁻¹ bar⁻¹), indicating superior pore formation and water mass transfer. The heterostructure between GO and LDH greatly improved cycling stability, with the membrane maintaining a permeance of 282.71 L m⁻² h⁻¹ bar⁻¹ and a rejection of 97.97% despite 20 cycles. This work demonstrated the potential of fluffy layered LDH 2D membranes for enhanced wastewater treatment applications. These findings suggested significant potential for practical implementation in industrial wastewater treatment processes, offering a sustainable and efficient solution to water pollution challenges.

化学和制药工业的迅速扩张导致各种微污染物进入环境，对饮用水质量和公众健康构成威胁。膜分离技术具有低能耗、高质量出水、操作简单等优点。在这里，我们开发了蓬松的层状双氢氧化物(LDH)/氧化石墨烯（GO） 2D膜，特别是单宁酸介导的LDH-GO/GO- ta复合膜（LG/GT）。氧化石墨烯纳米片的集成调节了LDH的生长，增强了电子转移和吸附驱动的催化性能。该设计使LDH-GO能够在10分钟内激活过氧单硫酸盐（PMS）并完全降解罗丹明B （RhB）。将高斯计算与这一发现相结合，可以解释分离过程中的催化自清洁现象。ta介导的增强进一步使LG/GT-7.5的RhB排斥反应增加到99.23%。此外，针/片结构显著提高了渗透率，达到358.28 L m−2 h−1 bar−1，超过了L/GT-7.5的性能（例如338.53 L m−2 h−1 bar−1），表明优越的孔隙形成和水质量传递。氧化石墨烯和LDH之间的异质结构极大地提高了循环稳定性，在循环20次后，膜的渗透率保持在282.71 L m−2 h−1 bar−1，截留率为97.97%。这项工作证明了蓬松层状LDH 2D膜在增强废水处理应用方面的潜力。这些发现表明了在工业废水处理过程中实际应用的巨大潜力，为水污染挑战提供了可持续和高效的解决方案。

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引用次数: 0

Ionic liquids with multiple hydrogen bonds as metal-free catalysts for efficient hydrolysis of PET under relatively mild conditions 具有多个氢键的离子液体作为无金属催化剂，在相对温和的条件下高效水解PET

IF 7.6 Q1 ENGINEERING, CHEMICAL

Green Chemical Engineering

Pub Date : 2026-06-01 Epub Date: 2024-12-13 DOI: 10.1016/j.gce.2024.12.001

Zhenyu Zhao , Jiayi Bai , Han Tao , Shenyao Wang , Kaili Wang , Wenjun Lin , Lili Jiang , Haoran Li , Congmin Wang

Due to the strong hydrophobicity of PET, chemical catalysts usually require harsh conditions. Herein, inspired by the catalytic sites of PETase, we reported a metal-free catalyst with both high stability and activity, which could achieve almost complete hydrolysis of PET (≥ 99%) under relatively mild conditions (100 °C, PH ≈ 8). Mechanistic investigations showed that hydrogen bonds played an important role. With the increase of hydrogen bond multiplicity and strength, the reaction barrier decreased gradually. We believe that this work might provide a direction for the development of efficient metal-free catalysts and have great industrial application prospects.

由于PET的强疏水性，化学催化剂通常需要苛刻的条件。本文中，受PETase催化位点的启发，我们报道了一种无金属催化剂，具有高稳定性和高活性，在相对温和的条件下（100°C, PH≈8）可以实现PET的几乎完全水解（≥99%）。机理研究表明，氢键起了重要作用。随着氢键数和强度的增加，反应势垒逐渐减小。本研究为高效无金属催化剂的开发提供了方向，具有广阔的工业应用前景。

引用次数: 0

OFC: Outside Front Cover OFC：外封面

IF 7.6 Q1 ENGINEERING, CHEMICAL

Green Chemical Engineering

Pub Date : 2026-03-01 Epub Date: 2025-10-31 DOI: 10.1016/S2666-9528(25)00081-0

引用次数: 0

Outside Back Cover 外封底

IF 7.6 Q1 ENGINEERING, CHEMICAL

Green Chemical Engineering

Pub Date : 2026-03-01 Epub Date: 2025-10-31 DOI: 10.1016/S2666-9528(25)00090-1

引用次数: 0

Mini-hydrocyclones in water: state-of-the-art 水中的小型水力旋流器：最先进的

IF 7.6 Q1 ENGINEERING, CHEMICAL

Green Chemical Engineering

Pub Date : 2026-03-01 Epub Date: 2024-09-10 DOI: 10.1016/j.gce.2024.09.002

Lin Liu , Yian Sun , Lixin Zhao , Yahong Wang , Zeth Kleinmeyer , Qinghai Yang , Diego Rosso

A mini-hydrocyclone (MHC) is known for its higher separation efficiency, particularly for fine or ultra-fine particles. However, the exact mechanism for enhancing the separation efficiency of MHCs has not been fully elucidated. This literature review fills the existing gap by comprehensively reviewing characteristics of the flow field inside MHCs, metrics of separation performance, applicable research methods, influence of physical and operating parameters, and provides references for future design and applications. Among them, the metrics of separation performance include grade separation efficiency, total separation efficiency, cut size, pressure drop, separation sharpness, and the fish hook effect, etc. This is the first time to comprehensively review the differences between MHCs and conventional hydrocyclones (CHCs) based on the above characteristics and metrics and analyze the separation advantages of MHCs. The fluid in MHC exhibits larger centrifugal acceleration, poor symmetry of tangential velocity, higher proportion of the wall friction loss, more obvious amplitude of partial sway of the air core, and smaller ratio of the locus of zero vertical velocity height to the total length of MHC. Challenges and further work on MHCs are also discussed in terms of potential applications and needed improvements.

微型旋流器（MHC）以其较高的分离效率而闻名，特别是对于细颗粒或超细颗粒。然而，提高mhc分离效率的确切机制尚未完全阐明。本文通过对mhc内部流场特征、分离性能指标、适用的研究方法、物理参数和操作参数的影响等方面的综述，填补了现有的空白，为今后的设计和应用提供参考。其中，分选性能指标包括品位分选效率、总分选效率、切割尺寸、压降、分选锐度、鱼钩效应等。本文首次综合评述了mhc与常规旋流器（CHCs）在上述特性和指标上的差异，并分析了mhc的分离优势。MHC内流体的离心加速度较大，切向速度对称性较差，壁面摩擦损失占比较高，空心偏摆幅值较明显，垂向零速度高度轨迹占MHC总长度的比例较小。从潜在的应用和需要改进的方面讨论了MHCs的挑战和进一步的工作。

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引用次数: 0

Emerging applications of N-heterocyclic carbenes and related materials in environmental decontamination n -杂环碳烯及其相关材料在环境净化中的新应用

IF 7.6 Q1 ENGINEERING, CHEMICAL

Green Chemical Engineering

Pub Date : 2026-03-01 Epub Date: 2024-09-27 DOI: 10.1016/j.gce.2024.09.010

Chengtao Yue , Xu Zhang , Hong Li , Chuanlei Luo , Fuwei Li

The increasingly environmental pollution have drawn global attentions to the development of new techniques that can effectively deal with the pollutants. With the unique set of electronic properties and structural diversities, N-heterocyclic carbenes (NHCs) and related materials are emerging as potential adsorbing materials for adsorptive decontamination of various pollutant-containing mediums. Recent investigations have revealed the feasibility of molecular and heterogeneous NHCs for adsorptive separation of harmful gases including CO₂, CO, NO_x, SO₂, etc. Rather than simple gas trapping, NHCs functions as effective catalytic centers that activating and transforming the captured gas molecules. Besides, heterogeneous NHCs and their complexes have been applied to adsorptive removal of various organic pollutants and heavy metal ions from water solution with high efficiencies. These advancements have illustrated the significant potential of NHCs and their related materials in environmental decontamination. Instead of the well-known catalytic applications of NHCs in organic transformations, this review aims to offer an overview of the emerging applications of NHCs in the field of environmental decontamination and provide a comprehensive understanding of the mechanisms behind the N-heterocyclic carbene material-mediated environmental decontamination processes. With this in mind, the structure, synthesis, application, and performance of NHCs and related materials in environmental processes including gas separation and wastewater treatment are summarized, and the structure-activity relationship is discussed. Besides, the current challenge and future development of NHC-mediated environmental treatments are proposed. This review is expected to serve as a preliminary database for the environmental applications of NHC and related materials and offer deep insights into the rational design of novel NHC-based environmental materials for greener and efficient environmental processes.

日益严重的环境污染已引起世界各国对开发有效治理污染物的新技术的关注。n -杂环碳烯（NHCs）及其相关材料由于其独特的电子性质和结构多样性，正成为各种含污染物介质吸附净化的潜在吸附材料。近年来的研究表明，分子和非均相NHCs对CO2、CO、NOx、SO2等有害气体的吸附分离是可行的。NHCs不是简单的气体捕获，而是作为有效的催化中心，激活和转化捕获的气体分子。此外，非均相NHCs及其配合物已被应用于高效吸附去除水中各种有机污染物和重金属离子。这些进展表明，NHCs及其相关材料在环境净化方面具有巨大潜力。本文不讨论NHCs在有机转化中的催化应用，而是综述了NHCs在环境净化领域的新兴应用，并全面了解了n -杂环碳材料介导的环境净化过程背后的机制。在此基础上，综述了NHCs及其相关材料的结构、合成、应用及其在气体分离和废水处理等环境过程中的性能，并对其构效关系进行了讨论。最后，提出了nhc介导的环境治理面临的挑战和未来的发展方向。本文旨在为NHC及其相关材料的环境应用提供一个初步的数据库，并为新型NHC基环境材料的合理设计提供深入的见解，以实现更绿色、更高效的环境过程。

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引用次数: 0

Environmentally sustainable production of biodiesel from low-cost lipid feedstock using a zirconium-based metal-organic framework sulfonated solid catalyst 使用锆基金属-有机框架磺化固体催化剂从低成本脂质原料中生产环境可持续的生物柴油

IF 7.6 Q1 ENGINEERING, CHEMICAL

Green Chemical Engineering

Pub Date : 2026-03-01 Epub Date: 2024-10-05 DOI: 10.1016/j.gce.2024.10.001

Balkis Hazmi , Umer Rashid , Bryan R. Moser , Mohd Hafizuddin Ab Ghani , Fahad A. Alharthi , Jeehoon Han , Jiyun Yoo

Heterogeneous acidic Zr-MOF (metal-organic framework) catalyst, UiO-66/SO₃H was synthesized for palm fatty acid distillate (PFAD)-methanol esterification. The characterizations for catalyst precursor and active catalyst were carried out using infrared spectroscopy, ammonia-temperature desorption analysis, thermogravimetric analyser, X-ray diffraction, surface textural analyser, and field emission scanning microscopy. The surface area of UiO-66 and UiO-66/SO₃H was 714.77 m²/g and 503.02 m²/g, respectively. Meanwhile, the acidity strength shown an increase in values, rising from 3.14 mmol/g to 7.98 mmol/g. Throughout the catalytic screening test under fixed parameters, UiO-66/SO₃H produced 72.3% of fatty acid methyl ester (FAME) while 45.9% catalyzed by UiO-66. Then, UiO-66/SO₃H was selected for response surface methodology-central composite design (RSM-CCD) optimization. Following 31 experiments, the optimized conditions were determined to be 75 °C, 1.3 h, 4.2 wt% catalyst, and a methanol to PFAD molar ratio of 21:1, resulting in a yield of 98.6% FAME. Reusability tests demonstrated that the catalyst maintained its activity for seven cycles, averaging 72.4% yield but subsequently dropping to 53.8% after the eighth cycle. Environmental sustainability was evaluated using life-cycle assessment (LCA) across seven impact categories: global warming potential, stratospheric ozone depletion, acidification potential, terrestrial ecotoxicity, freshwater ecotoxicity, marine ecotoxicity, and fossil resource scarcity. LCA analysis revealed that the PFAD process had a substantial global warming impact, with the exception of microalgae-based biodiesel. The PFAD process has lower acidification potential than soybean or lignocellulosic biomass. Our advanced biodiesel production method, with minimal methanol and low electricity, is an environmentally friendly alternative.

合成了棕榈脂肪酸馏出物(PFAD)-甲醇酯化非均相酸性Zr-MOF（金属-有机骨架）催化剂uuo -66/SO3H。采用红外光谱、氨温解吸分析、热重分析仪、x射线衍射、表面结构分析仪和场发射扫描显微镜对催化剂前驱体和活性催化剂进行了表征。UiO-66和UiO-66/SO3H的比表面积分别为714.77 m2/g和503.02 m2/g。与此同时，酸强度也有所增加，从3.14 mmol/g增加到7.98 mmol/g。在固定参数的催化筛选试验中，UiO-66/SO3H的脂肪酸甲酯（FAME）产率为72.3%，而UiO-66的产率为45.9%。然后选择UiO-66/SO3H进行响应面法-中心复合设计（RSM-CCD）优化。经过31次实验，确定最佳工艺条件为：75℃，1.3 h，催化剂重量为4.2 %，甲醇与PFAD的摩尔比为21:1，收率为98.6%。可重复使用性测试表明，该催化剂在7次循环中保持了活性，平均产率为72.4%，但在第8次循环后降至53.8%。利用生命周期评价法（LCA）对7个影响类别进行了环境可持续性评价：全球变暖潜势、平流层臭氧消耗、酸化潜势、陆地生态毒性、淡水生态毒性、海洋生态毒性和化石资源稀缺性。LCA分析显示，除微藻生物柴油外，PFAD过程对全球变暖有重大影响。与大豆或木质纤维素生物质相比，PFAD工艺具有较低的酸化潜力。我们先进的生物柴油生产方法，使用最少的甲醇和低电量，是一种环保的替代品。

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引用次数: 0

A high current density and long cycle life iron-chromium redox flow battery electrolyte 一种高电流密度、长循环寿命的铁铬氧化还原液流电池电解液

IF 7.6 Q1 ENGINEERING, CHEMICAL

Green Chemical Engineering

Pub Date : 2026-03-01 Epub Date: 2024-09-25 DOI: 10.1016/j.gce.2024.09.007

Yingchun Niu , Qingtan Gao , Runfa Zhao , Ziyu Liu , Ruichen Zhou , Shengwei Yuan , Jinfeng Yi , Wei Qiu , Chunming Xu , Quan Xu

The electrolyte in the flow battery is the carrier of energy storage, however, there are few studies on electrolyte for iron-chromium redox flow batteries (ICRFB). The low utilization rate and rapid capacity decay of ICRFB electrolyte have always been a challenging problem. Herein, the effect of Fe/Cr molar ratio, and concentration of HCl on the performance of ICRFBs at high current density (140 mA cm⁻²) are investigated. The average energy efficiency of the optimal electrolyte (1.25 M FeCl₂, 1.50 M CrCl₃, 3.0 M HCl) increases by 5.99% in the first 20 cycles, and the discharge capacity increases by 15.72% in the first cycle compared to the original commercial electrolyte (1.0 M FeCl₂, 1.0 M CrCl₃, 3.0 M HCl). This electrolyte also shows a longer cycle life. In addition, the COMSOL simulation on the concentration change of electrolyte in ICRFB is proposed, the effect of physical properties on the electrolyte is further explained. Through the simulation and analysis of this complex system, researchers can better understand the performance of flow battery systems. It is important to consider various challenges and constraints that might be encountered in practical applications. This work effectively saves the cost of ICRFB and further provides data support for their engineering applications.

液流电池中的电解液是储能的载体，但对铁铬氧化还原液流电池（ICRFB）电解液的研究较少。ICRFB电解液的利用率低、容量衰减快一直是一个具有挑战性的问题。本文研究了Fe/Cr摩尔比和HCl浓度对高电流密度（140 mA cm−2）下icrfb性能的影响。优化后的电解液（1.25 M FeCl2、1.50 M CrCl3、3.0 M HCl）在前20次循环中的平均能效比原商用电解液（1.0 M FeCl2、1.0 M CrCl3、3.0 M HCl）提高了5.99%，第一次循环的放电容量提高了15.72%。这种电解质也显示出更长的循环寿命。此外，提出了COMSOL模拟ICRFB中电解液浓度变化的方法，进一步解释了物理性质对电解液的影响。通过对这一复杂系统的仿真和分析，研究人员可以更好地了解液流电池系统的性能。考虑在实际应用中可能遇到的各种挑战和限制是很重要的。这项工作有效地节省了ICRFB的成本，并进一步为其工程应用提供了数据支持。

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引用次数: 0

Coupling pretreatment of lignocellulosic biomass for enzymatic hydrolysis with electrochemical reduction of CO2 for production of formic acid 木质纤维素生物质酶解预处理与电化学还原CO2制甲酸耦合研究

IF 7.6 Q1 ENGINEERING, CHEMICAL

Green Chemical Engineering

Pub Date : 2026-03-01 Epub Date: 2024-09-26 DOI: 10.1016/j.gce.2024.09.008

Xi Liu , Fangqian Wang , Yongrong Li , Xuebing Zhao

A new coupled electrolysis system has been developed by combining pretreatment of lignocellulosic biomass (corn stover) in alkaline anolyte for increasing cellulose digestibility with electrochemical reduction of CO₂ on the cathode to produce formic acid. Electrodeposition of Sn on calcinated copper foam results in preparation of an efficient cathode, ED-Sn@CuO_x, achieving 83.2% Faradaic efficiency of formate formation with a current density of 69.2 mA cm^-² in an H-type electrolysis cell. The ferricyanide/ferrocyanide redox couple plays an efficient electron mediator to improve the rate of electron transfer. Oxygen evolution reaction can be significantly suppressed, increasing the production rate of formate. Corn stover can be simultaneously pretreated by delignification in alkaline anolyte. Under the relatively optimal condition, the pretreated substrates obtained 96.6% glucose yield and 83.4% xylose yield. By inputting 1 kWh of electricity, the coupled system can obtain 0.27 kg formate with simultaneously pretreating 31.1 kg corn stover, resulting in the production of 14.2 kg fermentable sugars by subsequent enzymatic hydrolysis. Meanwhile, alkaline delignification in the anolyte also plays an important role in the increase of the pretreatment efficiency.

将木质纤维素生物质（玉米秸秆）在碱性阳极液中预处理以提高纤维素的消化率与阴极上电化学还原CO2生成甲酸相结合，建立了一种新的耦合电解系统。在h型电解池中，将Sn电沉积在煅烧的泡沫铜上，制备了高效阴极ED-Sn@CuOx，在电流密度为69.2 mA cm-2的情况下，形成甲酸盐的法拉第效率达到83.2%。铁氰化物/亚铁氰化物氧化还原偶对是提高电子转移速率的有效电子介质。可以明显抑制析氧反应，提高甲酸酯的产率。玉米秸秆可在碱性阳极液中同时进行脱木质素预处理。在相对最佳的条件下，预处理后的底物葡萄糖产率为96.6%，木糖产率为83.4%。通过输入1 kWh的电力，耦合系统可在预处理31.1 kg玉米秸秆的同时获得0.27 kg甲酸盐，并通过后续酶解生产14.2 kg可发酵糖。同时，阳极液中的碱性脱木质素作用对提高预处理效率也起着重要作用。

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引用次数: 0