Chemical Engineering and Processing - Process Intensification最新文献_第10页

Process intensification strategies for metal organic framework-based membrane photocatalysis in industrial wastewater treatment : A review 金属有机框架膜光催化在工业废水处理中的工艺强化策略综述

IF 3.9 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification

Pub Date : 2025-11-07 DOI: 10.1016/j.cep.2025.110618

Meitri Bella Puspa, Tutuk Djoko Kusworo, Andri Cahyo Kumoro, Aji Prasetyaningrum, Shalahudin Nur Ayyubi, Luthfi Kurnia Dewi, Muhammad Naufal Luqmanulhakim, Muallim Syahrir

Industrial wastewater often comprises diverse and recalcitrant pollutants that challenge conventional treatment approaches. Membrane photocatalysis, a hybrid technique that integrates membrane separation and photocatalytic degradation, has garnered increasing attention for its potential to address these complexities. Metal–Organic Frameworks (MOFs), known for their high porosity, tunable chemistry, and large surface area, have emerged as promising photocatalysts within such systems. However, limitations such as suboptimal photocatalytic performance, membrane fouling, and stability concerns under operational conditions remain major barriers to large-scale implementation. While numerous studies have explored MOF-based membranes, a focused investigation into process intensification (PI) strategies specifically targeting industrial applications is lacking. This review uniquely highlights and synthesizes diverse PI approaches including metal/non-metal doping, MOFs functionalization, heterojunction engineering, advanced light management, and reactor system design to enhance MOFs-based membrane photocatalysis. The novelty lies in consolidating these strategies within the industrial wastewater context, emphasizing not only performance enhancement but also scalability and cost-effectiveness. This work contributes toward bridging laboratory innovations with real-world applications, especially in resource-constrained settings. Furthermore, the study aligns with global sustainability priorities, notably SDGs 6, 12, and 14 by offering critical insights for stakeholders to develop efficient, environmentally sustainable, and cost-effective strategies for industrial water treatment.

工业废水通常包含各种顽固性污染物，对常规处理方法构成挑战。膜光催化是一种集膜分离和光催化降解为一体的混合技术，因其解决这些复杂问题的潜力而受到越来越多的关注。金属有机骨架（mof）以其高孔隙率、可调化学性质和大表面积而闻名，已成为这类系统中很有前途的光催化剂。然而，诸如次优光催化性能、膜污染和操作条件下的稳定性问题等限制仍然是大规模应用的主要障碍。虽然许多研究已经探索了基于mof的膜，但缺乏针对工业应用的过程强化（PI）策略的重点研究。本文综述了金属/非金属掺杂、MOFs功能化、异质结工程、先进光管理和反应器系统设计等多种膜光催化方法，以增强基于MOFs的膜光催化。新颖之处在于将这些策略整合到工业废水环境中，不仅强调性能提高，还强调可扩展性和成本效益。这项工作有助于将实验室创新与实际应用联系起来，特别是在资源受限的情况下。此外，该研究与全球可持续发展优先事项保持一致，特别是可持续发展目标6、12和14，为利益相关者制定高效、环境可持续和具有成本效益的工业水处理战略提供了重要见解。

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引用次数: 0

Kinetic insights into biomass char gasification for chemical looping reactor design 化学环反应器设计中生物质炭气化的动力学洞察

IF 3.9 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification

Pub Date : 2025-11-07 DOI: 10.1016/j.cep.2025.110617

Ishani Karki Kudva , Shekhar G. Shinde , Krutarth Pandit, Liang-Shih Fan

Biomass-based chemical looping offers a sustainable pathway for energy production and carbon-neutral fuels. A critical factor in designing such systems is the residence time of char, as it dictates the required reactor volume for targeted conversion. Accurate prediction of residence times prevents under- or over-design of equipment, ensuring efficient and cost-effective operation. In this work, biomass-derived char was tested in a thermogravimetric analyzer under a wide range of operating conditions, including particle size, temperature, and enhancer gas concentration. The experimental data were fitted to five kinetic models: homogeneous model, shrinking core model, n^th-order model, random pore model, and modified random pore model. The fitting procedure employed a nonlinear least-squares solver to minimize the error objective function. For each model, the best-fit kinetic parameters are determined. Among these, the RPM provided the best agreement with the experimental data. The obtained kinetic parameters were subsequently employed to simulate a packed-bed plug-flow reactor, representing a chemical looping reducer. The reactor model was then used to predict the residence times of char under non-isothermal operating conditions. The reactor model predicted a char residence time of approximately 21 min, resulting in 56.8% lower residence time as compared to that under isothermal conditions at 850 °C.

基于生物质的化学循环为能源生产和碳中性燃料提供了一条可持续的途径。设计这种系统的一个关键因素是焦炭的停留时间，因为它决定了目标转化所需的反应器体积。准确预测停留时间，防止设备设计不足或过度，确保高效和经济高效的运行。在这项工作中，在热重分析仪中，在各种操作条件下，包括粒径、温度和增强剂气体浓度，对生物质衍生的炭进行了测试。实验数据拟合了5种动力学模型：均匀模型、收缩核模型、n阶模型、随机孔隙模型和修正随机孔隙模型。拟合过程采用非线性最小二乘求解器，使误差目标函数最小。对于每个模型，确定了最适合的动力学参数。其中，转速与实验数据吻合最好。得到的动力学参数随后被用于模拟一个填充床塞流反应器，代表一个化学环减速剂。然后利用反应器模型预测了非等温操作条件下炭的停留时间。反应器模型预测焦炭停留时间约为21 min，与850℃等温条件下相比，停留时间缩短了56.8%。

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引用次数: 0

Axial dispersion in air-pulsed column with non-staggered circular slotted plates: A CFD study 非交错圆形槽板空气脉冲柱的轴向色散：CFD研究

IF 3.9 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification

Pub Date : 2025-11-05 DOI: 10.1016/j.cep.2025.110615

Anshuman Sharma , Nirvik Sen , K.K. Singh

A 2D axisymmetric Euler–Euler two-fluid CFD model is reported to estimate axial dispersion in a pulsed non-staggered circular slotted plate column (PNCSPC). Periodic steady-state velocity and pressure fields are obtained by solving the mass and momentum conservation equations for both phases along with equations of turbulence model. At discrete time instants within the pulsing cycle (snap-shots), steady-state equations for the first and second moments of species residence time distribution (RTD) are solved using the frozen flow field. This enables estimation of mean residence time and continuous-phase Peclet number (Pe) without solving conventional transient species transport equations. CFD predictions show 12.15 % average absolute relative deviation against experimental Pe data reported for classical pulsed disc-and-doughnut column (PDDC). The technique reported is faster than conventional one (∼90 times). Validated model is used to quantify effects of geometrical parameters - slot width, inter-plate spacing and fractional opening area – on Pe. An increase in fractional open area and inter-plate spacing increases Pe while an increase in slot width reduces Pe. 3-factor-3-level Box Behnken simulation design along with ANOVA study is used to identify the most influential parameter. A one-on-one comparison of PNCSPC vis-à-vis classical PDDC in terms of local flow structures and Pe is reported.

采用二维轴对称Euler-Euler双流体CFD模型对脉冲非交错圆形槽板柱（PNCSPC）的轴向色散进行了估计。通过求解两相的质量守恒方程和动量守恒方程以及湍流模型方程，得到了周期稳态速度场和压力场。在脉冲周期内的离散时刻（快照），利用冻结流场求解了种停留时间分布（RTD）的一阶矩和二阶矩的稳态方程。这使得估计平均停留时间和连续相佩莱特数（Pe），而无需解决传统的瞬态物质输运方程。计算流体力学（CFD）预测结果显示，与传统脉冲圆盘-甜甜圈柱（PDDC）的Pe实验数据相比，平均绝对相对偏差为12.15%。该技术的速度比传统技术快（约90倍）。利用验证模型定量分析了槽宽、板间间距和分数开口面积等几何参数对Pe的影响。分数开口面积和板间间距的增加会增加Pe，而槽宽的增加会降低Pe。采用3因素3水平Box Behnken模拟设计和方差分析研究来确定最具影响的参数。本文报道了PNCSPC与-à-vis经典PDDC在局部流结构和Pe方面的一对一比较。

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引用次数: 0

Extractive middle-wall dividing wall column with ionic liquid entrainer for enhanced ternary azeotrope separation 带离子液体夹带剂的萃取中壁分壁柱，增强了三元共沸物的分离

IF 3.9 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification

Pub Date : 2025-11-04 DOI: 10.1016/j.cep.2025.110613

Hengyan Zhou , Qingjun Zhang , Guoqiang Huang , Mingxin Hou , Wenyu Xiang , Chunjiang Liu

Conventional extractive distillation for ternary azeotrope separation suffers from excessive entrainer consumption, high energy demand, and capital costs. Process intensifications, such as heat-integrated distillation and top-wall dividing wall columns, have emerged to mitigate these limitations. However, these methods fail to address the fundamental challenge of coupling multiple extraction processes. To overcome this limitation, this study proposes an extractive middle-wall dividing wall column process (E-MDWC). The E-MDWC integrates two extractive processes, with the entrainer fed above the dividing wall, altering flow patterns and enhancing the mass-energy transfer in the column. This not only enhances separation efficiency but also reduces operating costs. In this paper, the COSMO-SAC model was employed to screen [BMIM][OAc] as the optimal entrainer for separating acetonitrile-ethanol-water azeotropes. The E-MDWC process was optimized using the NSGA-II to minimize the total annual cost (TAC) and CO₂ emissions. Compared to the conventional ternary extractive distillation process and the extractive top-wall dividing wall column process, the E-MDWC achieves reductions in TAC by 13.06 % and 9.43 %, and in CO₂ emissions by 10.45 % and 7.53 %, respectively, highlighting its superior performance. This study highlights the potential of E-MDWC as an advanced, economical, and sustainable solution for separating complex ternary azeotropes, particularly when utilizing low-volatility entrainers.

传统的萃取精馏分离三元共沸物，存在夹带剂消耗过多、能源需求高和资金成本高的问题。工艺强化，如热集成蒸馏和顶壁分壁柱，已经出现，以减轻这些限制。然而，这些方法未能解决耦合多个提取过程的根本挑战。为了克服这一局限性，本研究提出了萃取中壁分壁柱工艺（E-MDWC）。E-MDWC集成了两个萃取过程，夹带器在分离壁上方进料，改变了流动模式，增强了塔内的质能传递。这样既提高了分离效率，又降低了运行成本。本文采用cosmos - sac模型筛选[BMIM][OAc]作为分离乙腈-乙醇-水共沸物的最佳夹带剂。采用NSGA-II对E-MDWC工艺进行了优化，以最大限度地降低年总成本（TAC）和CO₂排放。与传统的三元萃取精馏工艺和萃取顶壁分壁塔工艺相比，E-MDWC的TAC分别降低了13.06%和9.43%，CO₂排放量分别降低了10.45%和7.53%，表现出其优越的性能。这项研究强调了E-MDWC作为一种先进、经济、可持续的分离复杂三元共沸物的解决方案的潜力，特别是在使用低挥发性夹带剂时。

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引用次数: 0

Elucidating deactivation characteristics and anti-deactivation mechanisms of oxygen vacancy-driven Fe-Co bimetallic-loaded goat manure-derived biochar catalyst via tar model compound removal 通过焦油模型化合物去除阐明氧空驱动铁钴双金属负载山羊粪便生物炭催化剂的失活特性和抗失活机理

IF 3.9 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification

Pub Date : 2025-11-04 DOI: 10.1016/j.cep.2025.110616

Xinjia Wang, Hui Jin, Jiankai Zhang, Haofeng Yang, Jinzheng Wang, Qinlong Hu, Haoyang Lou, Zhuqing Niu, Cong Dong, Yuanjun Tang, Zhongming Bu, Guoneng Li, Chao Ye

Biochar catalysts often suffer from rapid deactivation caused by carbon deposition during long-term operation. Here, we synthesized a Fe–Co bimetallic catalyst supported on goat manure-derived biochar via a one-pot method and evaluated its stability in toluene catalytic cracking. After 90 min of reaction, the Fe–Co catalyst sustained higher toluene conversion at 29.35 % and reduced carbon deposition to 20.31 %, compared with 23.06 % conversion and 35.90 % deposition for the Fe-only catalyst. Structural analysis revealed the coexistence of CoFe and CoFe₂O₄ phases, which inhibited graphitized carbon formation and metal sintering. The Fe–Co catalyst also exhibited higher oxygen-vacancy concentration, enabling more efficient adsorption and activation of lattice oxygen. Dynamic regulation of oxygen vacancies promoted oxygen migration and carbon removal, extending catalytic lifetime. These results demonstrate that the synergy between CO₂ activation and the Fe–Co bimetallic structure effectively enhances the resistance of biochar catalysts to deactivation.

生物炭催化剂在长期运行过程中，往往会因积碳而快速失活。本文采用一锅法合成了一种负载于羊粪生物炭上的Fe-Co双金属催化剂，并对其在甲苯催化裂化中的稳定性进行了评价。反应90 min后，Fe-Co催化剂的甲苯转化率为29.35%，碳沉积降至20.31%，而纯fe催化剂的甲苯转化率为23.06%，碳沉积为35.90%。结构分析表明，CoFe和CoFe2O4相共存，抑制了石墨化碳的形成和金属烧结。Fe-Co催化剂也表现出更高的氧空位浓度，使晶格氧的吸附和活化更有效。氧空位的动态调节促进了氧的迁移和碳的去除，延长了催化寿命。这些结果表明，CO2活化与Fe-Co双金属结构之间的协同作用有效地增强了生物炭催化剂的抗失活能力。

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引用次数: 0

Nanobubbles for process intensification: Modeling microbial growth and inactivation 纳米气泡过程强化：模拟微生物生长和灭活

IF 3.9 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification

Pub Date : 2025-11-04 DOI: 10.1016/j.cep.2025.110614

Karol Ulatowski, Tomasz Ciach, Paweł Sobieszuk

Nanobubbles (NBs) are increasingly recognized as powerful agents capable of intensifying chemical and biotechnological processes. Their unique physicochemical properties, including stability, prolonged residence in liquids, and the ability to modulate biological activity, create new opportunities for both microbial growth stimulation and sterilization. Numerous studies describe the effects of NBs on microorganisms, yet mechanistic explanations remain fragmented and often speculative. In this review, we gathered the promising data from literature and applied the classical bioprocess modeling to quantify and compare the impact of NBs on microbial cultures. Our aim is to show the ways of mathematical description of bioprocesses involving nanobubbles. This approach allows a systematic assessment of process intensification potential without relying on biological mechanisms, which are still not studied thoroughly enough. We have extracted the data from articles published in this subject, proposed the way of mathematical modelling (along with some guidelines about the choice of kinetic model for different purposes) and calculated the appropriate kinetic constants. The comparison of kinetic constants between cultures with and without nanobubles showed how NB dispersions alter growth rates, metabolite production, and inactivation dynamics. We ended the review with the conclusions describing our view on the needs for the future studies and experiments.

纳米气泡（NBs）越来越被认为是一种强大的试剂，能够加强化学和生物技术过程。它们独特的物理化学性质，包括稳定性，在液体中的长时间停留，以及调节生物活性的能力，为促进微生物生长和杀菌创造了新的机会。许多研究描述了NBs对微生物的影响，但机械解释仍然支离破碎，而且往往是推测性的。在这篇综述中，我们从文献中收集了有希望的数据，并应用经典的生物过程模型来量化和比较NBs对微生物培养的影响。我们的目的是展示涉及纳米气泡的生物过程的数学描述方法。这种方法可以在不依赖生物机制的情况下对过程强化潜力进行系统评估，生物机制的研究还不够彻底。我们从本学科发表的文章中提取了数据，提出了数学建模的方法（以及针对不同目的选择动力学模型的一些指导方针），并计算了适当的动力学常数。比较有纳米气泡和没有纳米气泡的培养物之间的动力学常数显示了NB分散体如何改变生长速率、代谢物产生和失活动力学。我们总结了我们对未来研究和实验需求的看法。

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引用次数: 0

A multicriteria decision making approach for wheat starch isolation intensification 小麦淀粉分离强化的多准则决策方法

IF 3.9 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification

Pub Date : 2025-11-02 DOI: 10.1016/j.cep.2025.110612

Alfonso Morales-Huerta , Angelica Roman-Guerrero , J. Alberto Ochoa-Tapia , E. Jaime Vernon-Carter , Jose Alvarez-Ramirez

Starch isolation processes from cereals involve the use of enzymes to improve yield by removing lipids, proteins and undesired polysaccharides. Experimental evidence shows that this strategy is successful, leading to yield increases of 15–30 % compared to traditional techniques using chemicals promoters. Although the use of enzymes can be labeled as green and sustainable, it may entail relatively low isolation yield. An approach is to use ultrasound to further increase isolation yield. Within the framework of process intensification, enzymes and ultrasound can be combined within a sole process to increase isolation yield and reduce the usage of disposable chemical substances. However, process intensification is not obtained without cost as it may entail some deterioration of desirable starch characteristics. Hence, the selection of optimal isolation conditions for starch isolation faces multiple conflicting objectives. This work addressed this problem by developing experiments to establish the effect of enzyme and ultrasound aimed at establishing the best isolation conditions considering not only yield but also color and in vitro digestibility criteria. The decision analysis used the popular TOPSIS approach in combination with Monte Carlo simulations to include experimental uncertainty. The analysis showed that the weighting given to decision criteria groups allows for the analysis of various manufacturing scenarios where nutritional aspects are weighted above other criteria. Experimental data uncertainty plays a significant role, as measurement error can decisively affect the best operating condition choice. Results presented here promote the use of computational multicriteria decision-making tools for process optimization and intensification in food industry.

从谷物中分离淀粉的过程包括使用酶通过去除脂质、蛋白质和不需要的多糖来提高产量。实验证据表明，这一策略是成功的，与使用化学促进剂的传统技术相比，产量提高了15 - 30%。虽然酶的使用可以被标记为绿色和可持续的，但它可能需要相对较低的分离产量。一种方法是利用超声进一步提高分离收率。在过程强化的框架内，酶和超声波可以在一个单一的过程中结合，以提高分离率，减少一次性化学物质的使用。然而，过程强化不是没有成本的，因为它可能会导致一些理想的淀粉特性的恶化。因此，淀粉分离的最佳分离条件的选择面临着多个相互冲突的目标。为了解决这一问题，本工作通过开展实验来确定酶和超声的影响，旨在建立最佳的分离条件，不仅考虑产量，而且考虑颜色和体外消化率标准。决策分析使用流行的TOPSIS方法与蒙特卡罗模拟相结合，以包括实验不确定性。分析表明，给予决策标准组的权重允许分析各种生产方案，其中营养方面的权重高于其他标准。实验数据的不确定度起着重要的作用，测量误差对最佳工况的选择具有决定性的影响。本文提出的结果促进了在食品工业过程优化和集约化中使用计算多标准决策工具。

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引用次数: 0

Investigation on the flame quenching and explosion suppression effect on combustible gas/oxygen mixtures by different random packing 不同随机填料对可燃气体/氧气混合物的灭焰抑爆效果研究

IF 3.9 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification

Pub Date : 2025-11-01 DOI: 10.1016/j.cep.2025.110611

Ru-Song Shang, Shou-Tao Ma, Hong-Wei Zhu, Wei Xu, Bing Sun

Gas-phase oxidation processes constitute vital chemical reaction systems that are extensively employed in the chemical engineering process. Given that the feedstocks involved in these reactions are predominantly composed of flammable gases, the presence of oxygen at a specific concentration within the reactant mixture gives rise to the formation of a combustible system. Under such circumstances, ignition sources have the potential to trigger explosions, which in turn pose significant safety hazards to both operating personnel and industrial equipment. This study examines the explosion overpressure suppression and flame quenching effects of Fenske spiral packing, Dixon ring packing, and Al₂O₃ spheres on propylene/air explosions in enclosed pipe. Novel findings include that random packings effectively suppress explosions via superior thermal conductivity and stacking-induced microchannels, with their efficacy showing pressure dependence: Fenske spiral packing performs best at 1.0 and 2.0 bar, while Dixon ring packing is superior at 1.5 bar. Compared to the blank experiment, the maximum overpressure in the pipe with random packing was reduced by 30 % and 50 % for the premixed gases. This work provides critical insights for selecting explosion-suppression packings, advances the design of inherently safe chemical processes, and bridges safety assurance with process intensification to support integrated, high-performance chemical process systems.

气相氧化过程是化学工程过程中广泛应用的重要化学反应系统。考虑到这些反应中涉及的原料主要由可燃气体组成，在反应物混合物中以特定浓度存在的氧气会形成可燃系统。在这种情况下，点火源有可能引发爆炸，从而对操作人员和工业设备构成重大安全隐患。本研究考察了Fenske螺旋填料、Dixon环填料和Al2O3球对封闭管道丙烯/空气爆炸的爆炸超压抑制和火焰淬火效果。新发现包括随机填料通过优越的导热性和堆积诱导的微通道有效抑制爆炸，其效果表现出压力依赖性：Fenske螺旋填料在1.0和2.0 bar时表现最佳，而Dixon环填料在1.5 bar时表现最佳。与空白实验相比，随机填料管道内的最大超压分别降低了30%和50%。这项工作为选择防爆填料提供了重要的见解，推进了固有安全化学过程的设计，并将安全保证与过程强化联系起来，以支持集成的高性能化学过程系统。

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引用次数: 0

Catalysts-free decomposition of CO2 to CO by synergistic effect of dielectric barrier discharge plasma and metal mesh 介质阻挡放电等离子体与金属网协同作用，无催化剂将CO2分解为CO

IF 3.9 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification

Pub Date : 2025-10-31 DOI: 10.1016/j.cep.2025.110609

Da Sun , Hang Liu , Hong Li , Jingsen Zhang , Xiuling Zhang , Yue Hua , Bin Li , Lanbo Di

Dielectric barrier discharge (DBD) plasma packed with cheap stainless steel, brass and copper mesh is developed and adopted for CO₂ decomposition to CO and O₂. Packing copper mesh exhibits the best performance, and its CO₂ decomposition rate is 1.3 times that of empty tube. When the CO₂ flow rate was 60 mL min^-1 and the input power was 30 W, the CO₂ decomposition rate and energy efficiency were 21.2 % and 14.4 %, respectively. It exhibits highly stable performance during 10 h continuous reaction. Plasma diagnostic results reveal that the incorporation of the metal mesh and the increased number of winding turns facilitate the transition of the discharge mode from volume discharge to surface discharge. This enhancement in reduced electric field strength elevates the population of high-energy electrons, while simultaneously augmenting the effective capacitance and expanding both heat transfer and discharge areas, thereby improving CO₂ decomposition. Furthermore, the copper mesh exhibits superior performance due to its excellent thermal conductivity, and the adhesion of oxygen atoms, which not only further increases CO₂ decomposition efficiency but also significantly reduces undesirable reverse reactions. Renewable electricity powered DBD-copper mesh synergistic system for decomposing CO₂ into CO offers multiple practical advantages, including simple electrode, cost-effectiveness, and excellent scalability.

采用廉价的不锈钢、黄铜和铜网包装介质阻挡放电等离子体，将CO2分解为CO和O2。填料铜网性能最好，其CO2分解率是空管的1.3倍。当CO2流量为60 mL min-1，输入功率为30 W时，CO2分解率和能效分别为21.2%和14.4%。在连续反应10 h内表现出高度稳定的性能。等离子体诊断结果表明，金属网的加入和绕组匝数的增加促进了放电方式从体积放电到表面放电的转变。电场强度的增强提高了高能电子的数量，同时增加了有效电容，扩大了传热和放电面积，从而改善了CO₂分解。此外，铜网由于其优异的导热性和氧原子的粘附性而表现出优异的性能，这不仅进一步提高了CO₂分解效率，而且显著减少了不良的逆反应。可再生电力驱动的dbd -铜网协同系统将CO₂分解为CO，具有多种实用优势，包括简单的电极，成本效益和出色的可扩展性。

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引用次数: 0

Numerical evaluation of operating conditions in an array micromix combustor: Effects of hydrogen enrichment and inlet bulk velocity on flame stability 阵列微混合燃烧室运行条件的数值评价：富氢和进口体速对火焰稳定性的影响

IF 3.9 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification

Pub Date : 2025-10-30 DOI: 10.1016/j.cep.2025.110608

Maoqi Lu , Tao Zhang , Xianqi Zhu , Rongtang Liu , Yong He , Kaidi Wan , Xinlu Han

The advancement of array micromix combustion technology supports hydrogen (H₂)-enriched fuel utilization, essential for reducing fossil fuel consumption and achieving carbon neutrality. However, comprehensive guidelines for safe operation across a wide range of parameters still need to be established. In this paper, numerical calculations are conducted to reveal the effects of H₂ enrichment and inlet velocity on flame behavior and combustion stability in an array micromix combustor. The results demonstrate that the combustor provides flexible combustion performance even under near-stoichiometric conditions, efficiently utilizing a wide range of fuels, including pure methane (CH₄) and pure H₂. Moreover, adjusting the equivalence ratio allows for low-emission performance. Blow-out of the H₂-enriched array flame starts at the outermost nozzle, and this behavior occurs under all inlet velocity conditions from 20 to 120 m/s. Based on this foundation, stability maps are constructed to illustrate the interdependence between the H₂ blending ratio and equivalence ratio, as well as the relationship between inlet velocity and equivalence ratio. The results indicate that higher H₂ enrichment expands the blow-out limit range. Two inflection points emerge in the blow-out limit curve during the transition from CH₄ to H₂. Additionally, increasing inlet velocity shifts the blow-out limit to higher equivalence ratios. However, this trend weakens as H₂ enrichment exceeds 80 %. A dimensionless Peclet model incorporating Reynolds number correction is proposed to predict flame blow-out limit curves, which offers assistance in design optimization for H₂-enriched fuel operating conditions to ensure the stability of array micromix combustors.

阵列微混合燃烧技术的进步支持氢（H2）富集燃料的利用，这对于减少化石燃料消耗和实现碳中和至关重要。然而，仍然需要建立广泛参数范围内的安全操作综合指南。本文通过数值计算揭示了H2富集和进口速度对阵列微混合燃烧室火焰行为和燃烧稳定性的影响。结果表明，即使在接近化学计量的条件下，燃烧器也能提供灵活的燃烧性能，有效地利用各种燃料，包括纯甲烷（CH4）和纯氢气。此外，调整等效比可以实现低排放性能。富h2阵列火焰的熄灭始于最外层的喷嘴，这种行为在20 ~ 120m /s的所有进口速度条件下都发生。在此基础上，构建了稳定性图，说明了混合H2比与当量比的相互关系，以及进口速度与当量比的关系。结果表明，H2富集程度越高，吹出极限范围越大。在CH4向H2的过渡过程中，井喷极限曲线出现了两个拐点。此外，增加进口速度会使喷流极限转向更高的等效比。然而，当H2富集超过80%时，这种趋势减弱。提出了一种考虑雷诺数校正的无量纲Peclet模型来预测火焰爆灭极限曲线，为富h2燃料工况优化设计提供了依据，保证了阵列微混合燃烧室的稳定性。

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引用次数: 0