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Eco-Friendly Synthesis of Porous Molybdenum Carbide Nanomaterials for Advanced Electrochemical Sensing Applications 用于先进电化学传感应用的多孔碳化钼纳米材料的生态友好合成
IF 1.8 4区 工程技术 Q3 ENGINEERING, CHEMICAL Pub Date : 2024-08-14 DOI: 10.1002/ceat.202400139
Hamid Ilbeygi, Craig Priest, Dario Arrua, Eva Alvarez de Eulate, Nicolas Riesen, Emily Hilder

A highly stable and electrochemically active porous molybdenum carbide (PMC) has been synthesized from agricultural waste by carburization of bagasse under inert conditions. The surface area and porous structure of the resulting PMCs can be tuned by varying the synthesis conditions. The PMCs obtained have been characterized via XRD, XPS, SEM, and gas physisorption techniques. The final PMC materials are highly crystalline with nanoscale porosity and with an active surface area of up to 717 m2.g−1. This work unlocks a promising avenue for developing highly active electrochemical nanomaterials using green synthesis, potentially eliminating the need for noble metals. The results demonstrate a six-fold increase in the electrochemical signal.

在惰性条件下,通过对甘蔗渣进行渗碳处理,从农业废弃物中合成了一种高度稳定且具有电化学活性的多孔碳化钼(PMC)。可以通过改变合成条件来调整所得到的 PMC 的表面积和多孔结构。通过 XRD、XPS、SEM 和气体物理吸附技术对获得的 PMC 进行了表征。最终得到的 PMC 材料具有高度结晶性和纳米级孔隙率,活性表面积高达 717 m2.g-1。这项工作为利用绿色合成技术开发高活性电化学纳米材料开辟了一条大有可为的途径,有可能消除对贵金属的需求。结果表明,电化学信号增加了六倍。
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引用次数: 0
Airborne Toluene Removal by Dynamic Adsorption on Fiber- and Granular-Activated Carbon 通过纤维和颗粒活性炭上的动态吸附去除空气中的甲苯
IF 1.8 4区 工程技术 Q3 ENGINEERING, CHEMICAL Pub Date : 2024-08-14 DOI: 10.1002/ceat.202300556
Dr. Vu Tung Lam Tran, Dr. Lan Huong Phung, Dr. Anh Vu Nguyen, Dr. Minh Ngoc Ha, Assoc. Prof. Dr. Pham Thanh Huyen

The selection of adsorbents is critical for developing an adsorption unit. In this study, a activated carbon fibers (ACF) and a granular-activated carbon (GAC) were evaluated in dynamic toluene adsorption to determine their benefits and limitations. A variety of physicochemical approaches were used to characterize the samples. Adsorption under varied circumstances demonstrated that ACF has a larger adsorption capacity and a longer saturation time than GAC. The Langmuir isotherm suited equilibrium data well. Thermodynamic characteristics showed that adsorption was spontaneous and exothermic. The adsorption kinetics were found to be dominated by the pseudo-first-order model, with GAC having a greater sorption rate. Thermal regeneration appeared to be more favorable for ACF.

吸附剂的选择对于开发吸附装置至关重要。本研究对活性炭纤维(ACF)和颗粒活性炭(GAC)进行了动态甲苯吸附评估,以确定它们的优点和局限性。采用了多种物理化学方法来描述样品的特性。不同情况下的吸附结果表明,与 GAC 相比,ACF 的吸附容量更大,饱和时间更长。朗缪尔等温线非常适合平衡数据。热力学特征表明,吸附是自发和放热的。吸附动力学以假一阶模型为主,GAC 的吸附率更高。热再生似乎对 ACF 更为有利。
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引用次数: 0
Efficient CoCu/SiO2 Catalyst Derived from Co(Cu) Silicate for Aqueous-Phase Furfural Hydrogenation 硅酸钴(铜)衍生的高效 CoCu/SiO2 水相糠醛加氢催化剂
IF 1.8 4区 工程技术 Q3 ENGINEERING, CHEMICAL Pub Date : 2024-08-12 DOI: 10.1002/ceat.202300265
Jinxin Zhang, Zhili Fan, Dongfang Wu

Converting the abundant biomass resources in nature into fine chemicals can not only reduce carbon emissions but also effectively deal with the depletion of fossil energy, which is of strategic significance for sustainable development. In this paper, by optimizing the content of bimetallic components, highly active co-doped Co1Cu3 bimetallic silicate was designed and synthesized. After reduction, a highly dispersed and stable Co1Cu3/SiO2 catalyst was obtained, which was used to catalyze the aqueous phase hydrogenation of furfural (FFR) to cyclopentanone (CPO). Compared with the traditional supported catalyst, the Co1Cu3/SiO2-ammonia evaporation (AE)-300 catalyst prepared by AE has the best performance. Under the optimal reaction conditions, the conversion of FFR was as high as 95.1 % and the selectivity of CPO was 88.6 %. This high activity can be attributed to the formation of highly dispersed and uniform metal active sites with low content of Co. At the same time, the formation of flocculent silicate enhances the synergism between CoCu and SiO2 support and increases the specific surface area of the catalyst. In addition, the experimental results show that the reaction carbon balance will be destroyed with the high concentration of FFR solution.

将自然界丰富的生物质资源转化为精细化学品,不仅可以减少碳排放,还能有效应对化石能源的枯竭,对可持续发展具有重要的战略意义。本文通过优化双金属成分的含量,设计合成了高活性共掺杂 Co1Cu3 双金属硅酸盐。还原后,得到了高度分散和稳定的 Co1Cu3/SiO2 催化剂,用于催化糠醛(FFR)水相加氢制环戊酮(CPO)。与传统的支撑催化剂相比,Co1Cu3/SiO2-氨蒸发(AE)-300 催化剂的性能最佳。在最佳反应条件下,FFR 的转化率高达 95.1%,CPO 的选择性为 88.6%。同时,絮状硅酸盐的形成增强了 CoCu 与 SiO2 载体之间的协同作用,增加了催化剂的比表面积。此外,实验结果表明,高浓度的 FFR 溶液会破坏反应碳平衡。
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引用次数: 0
Simulation of Modified Nanoporous Titanate Composite Membrane in Reverse Osmosis Desalination Process 改性纳米多孔钛酸酯复合膜在反渗透海水淡化过程中的应用模拟
IF 1.8 4区 工程技术 Q3 ENGINEERING, CHEMICAL Pub Date : 2024-08-09 DOI: 10.1002/ceat.202300550
Parinaz Deymi, Abdolrasoul Pouranfard, Daryoush Emadzadeh

Nowadays, due to the lack of drinking water and the increase in global demand, desalination by reverse osmosis (RO) has been developed. In this regard, activities have been carried out to increase water flux and salt removal, which are important indicators in this process, including membrane modification by loading nanoparticles (NPs). Process simulation plays an important role in reducing laboratory costs, improving efficiency, and investigating operational parameters in more detail. This is an important factor that leads us to process simulation. The simulation of the RO process by thin-film composite membranes modified with nanoporous titanate (mNTs) NPs has been conducted using COMSOL software. The performance of this process was checked by loading different amounts of mNTs with the desired membrane. The results revealed that by adding 0.01 w % of mNTs to the membrane composition, the performance of the process was improved in that the initial water flux through the membrane increased by about 95.4 %, while the salt rejection remained nearby 98 % and did not decrease much. Finally, to validate and expand the simulation results, the model outcomes were compared with experimental data, and the mean relative error for water flux and salt removal percentage was 1.15 % and 0.83 %, respectively.

如今,由于饮用水的缺乏和全球需求的增加,已经开发出了反渗透(RO)海水淡化技术。在这方面,已经开展了各种活动来提高水通量和盐去除率(这是该工艺的重要指标),包括通过添加纳米粒子(NPs)对膜进行改性。过程模拟在降低实验室成本、提高效率和更详细地研究操作参数方面发挥着重要作用。这是导致我们进行过程模拟的一个重要因素。我们使用 COMSOL 软件对使用纳米多孔钛酸(mNTs)NPs 改性的薄膜复合膜进行反渗透工艺模拟。通过在所需膜中加入不同量的 mNTs,检验了该工艺的性能。结果表明,在膜成分中添加 0.01 w % 的 mNTs 后,该工艺的性能得到了改善,通过膜的初始水通量增加了约 95.4 %,而盐排斥率保持在 98 % 附近,并没有大幅下降。最后,为了验证和扩展模拟结果,将模型结果与实验数据进行了比较,结果发现水通量和盐去除率的平均相对误差分别为 1.15 % 和 0.83 %。
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引用次数: 0
On the Role of Radial Dispersion in the Behavior of a Cooled Fixed-Bed Reactor: Numerical Investigation of Fischer–Tropsch Synthesis with a Cobalt-Based Catalyst 论径向分散在冷却固定床反应器行为中的作用:使用钴基催化剂进行费托合成的数值研究
IF 1.8 4区 工程技术 Q3 ENGINEERING, CHEMICAL Pub Date : 2024-07-31 DOI: 10.1002/ceat.202400201
Christoph Kern, Andreas Jess

The impact of radial dispersion of both heat and mass on the behavior of cooled fixed-bed reactors was explored using a two-dimensional reactor model. This study accounted for dispersion through an effective radial thermal conductivity (λrad) and a radial dispersion coefficient of mass (Drad), with Fischer–Tropsch synthesis serving as an illustrative process example. Under moderate reaction conditions and hence still rather gentle radial temperature profiles, the effect of mass dispersion on reactor performance was found to be minimal, even if disregarded (Drad = 0), whereas dispersion of heat (λrad) always significantly impacts reactor behavior. Nevertheless, for precise thermal runaway predictions by a reactor model, incorporating mass dispersion by a realistic Drad value is essential.

使用二维反应器模型探讨了热量和质量的径向分散对冷却固定床反应器行为的影响。该研究通过有效径向热传导率(λrad)和质量径向分散系数(Drad)来考虑分散问题,并以费托合成为例进行了说明。在中等反应条件下,径向温度曲线仍然相当平缓,即使不考虑质量分散(Drad = 0),质量分散对反应器性能的影响也微乎其微,而热量分散(λrad)始终对反应器行为产生重大影响。尽管如此,要通过反应器模型精确预测热失控,就必须通过现实的 Drad 值将质量弥散纳入其中。
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引用次数: 0
Acetylene Hydrogenation Processes Studied Using CFD in a Packed Bed Reactor 利用 CFD 研究填料床反应器中的乙炔加氢过程
IF 1.8 4区 工程技术 Q3 ENGINEERING, CHEMICAL Pub Date : 2024-07-31 DOI: 10.1002/ceat.202300436
Zhixin Guo, Siying Xin, Chongpeng Du Du, Dr. Hedan Yao, Dr. Liuyi Pan, Prof. Chenyang Lu, Prof. Dong Li

Acetylene hydrogenation reactions (AHR) are typically carried out in fixed bed reactors (FBRs) with high diameter-to-particle diameter (D/d). In this study, first, a real catalyst bed was built using the discrete element method, and the suitability of the bed was assessed using empirical equations. Second, a discrete element method-computational fluid dynamics (DEM-CFD) model was developed using CFD in conjunction with the reaction mechanism to simulate the AHR in the FBR and was compared with the experimental results. The results show that the DEM-CFD can well predict the 3D interactions of velocity, temperature, and species for different D/d. The results can provide favorable theoretical guidance for the optimization of FBR and process intensification.

乙炔加氢反应(AHR)通常在具有高直径/颗粒直径(D/d)的固定床反应器(FBR)中进行。在这项研究中,首先使用离散元法构建了一个真实的催化剂床,并使用经验方程评估了床的适用性。其次,利用 CFD 结合反应机理建立了离散元法-计算流体动力学(DEM-CFD)模型,以模拟 FBR 中的 AHR,并与实验结果进行了比较。结果表明,DEM-CFD 可以很好地预测不同 D/d 条件下速度、温度和物种的三维相互作用。这些结果可为 FBR 的优化和工艺强化提供有利的理论指导。
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引用次数: 0
Analysis of Solar Thermal Energy Integration in the Industry in Indonesia 印尼太阳能热利用在工业中的应用分析
IF 1.8 4区 工程技术 Q3 ENGINEERING, CHEMICAL Pub Date : 2024-07-30 DOI: 10.1002/ceat.202300607
Prof. Renanto Handogo, Dr. Rendra Panca Anugraha, Juwari Purwo Sutikno, Vibianti Dwi Pratiwi, Hamdan Ihsan, Faiqur Rifqi

This study focuses on designing a solar thermal system utilizing parabolic trough collectors to replace conventional heat requirements in industrial processes. The research also assesses the impact of implementing this system on reducing CO2 emissions and provides economic analysis for industrial cities from two geographically different islands in Indonesia: Java and Sulawesi. This study uses a parabolic trough collector to absorb energy from sunlight. Based on the calculation of the energy balance of the solar collector, the average heat absorbed by the collector is 545.5 kJ m−2 h−1 in Java and 606.5 kJ m−2 h−1 in Sulawesi. As a result, approximately 67.55 tonnes of CO2 per day will be mitigated by transitioning from conventional processes. The economic analysis indicates a payback period of 3.54 years, a net present value of 1.4 million USD, and an internal rate of return of 12 % based on fuel savings.

本研究的重点是利用抛物面槽式集热器设计太阳能热系统,以替代工业流程中的传统热需求。研究还评估了实施该系统对减少二氧化碳排放的影响,并为印度尼西亚两个地理位置不同的岛屿上的工业城市提供了经济分析:爪哇岛和苏拉威西岛。这项研究使用抛物面槽式集热器从太阳光中吸收能量。根据太阳能集热器的能量平衡计算,集热器吸收的平均热量在爪哇岛为 545.5 kJ m-2 h-1,在苏拉威西岛为 606.5 kJ m-2 h-1。因此,通过从传统工艺过渡,每天可减少约 67.55 吨二氧化碳。经济分析表明,投资回收期为 3.54 年,净现值为 140 万美元,根据节省的燃料计算,内部收益率为 12%。
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引用次数: 0
Enhanced Degradation of Ciprofloxacin Hydrochloride Using Hybrid Advanced Oxidation Process of Hydrodynamic Cavitation and Ozonation 利用水动力空化和臭氧混合高级氧化工艺提高盐酸环丙沙星的降解能力
IF 1.8 4区 工程技术 Q3 ENGINEERING, CHEMICAL Pub Date : 2024-07-27 DOI: 10.1002/ceat.202300469
Narendra Bodawar, Rohit Shetty, Sanjay Kamble, Prashant Kulkarni

The degradation of ciprofloxacin hydrochloride (CFX), an extensively utilized antibiotic for bacterial infections, has been studied through the application of advanced oxidation processes (AOPs) including hydrodynamic cavitation (HC), ozonation (O3), the Fenton reaction, chemical oxidation, and hybrid AOPs such as HC/O3 and Fenton/O3. Among these, the hybrid combination of HC/O3 demonstrated the highest CFX degradation of 99.82 % within 180 min having an initial concentration of 1000 ppm. The optimization of the HC/O3 process was conducted by varying parameters including initial concentration, pH, ozone (O3) gas flowrate, and temperature. Throughout the degradation process, CFX underwent intermediate formation, which gradually degraded over time.

盐酸环丙沙星(CFX)是一种广泛用于细菌感染的抗生素,研究人员通过应用高级氧化工艺(AOPs),包括水动力空化(HC)、臭氧氧化(O3)、芬顿反应、化学氧化以及 HC/O3 和 Fenton/O3 等混合 AOPs,对其进行了降解研究。其中,在初始浓度为 1000 ppm 的情况下,HC/O3 混合组合在 180 分钟内对 CFX 的降解率最高,达到 99.82%。通过改变初始浓度、pH 值、臭氧(O3)气体流量和温度等参数,对 HC/O3 工艺进行了优化。在整个降解过程中,CFX 会形成中间产物,并随着时间的推移逐渐降解。
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引用次数: 0
Cover Picture: Chem. Eng. Technol. 8/2024 封面图片:封面图片:Chem.Eng.Technol.8/2024
IF 1.8 4区 工程技术 Q3 ENGINEERING, CHEMICAL Pub Date : 2024-07-22 DOI: 10.1002/ceat.202470801

© xiaoliangge@AdobeStock

© xiaoliangge@AdobeStock
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引用次数: 0
Overview Contents: Chem. Eng. Technol. 8/2024 概述 内容:Chem.Eng.Technol.8/2024
IF 1.8 4区 工程技术 Q3 ENGINEERING, CHEMICAL Pub Date : 2024-07-22 DOI: 10.1002/ceat.202470803
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引用次数: 0
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