International Journal of Chemical Reactor Engineering最新文献_第5页

An experimental evaluation of green surfactants to stabilize silica nanofluids in saline conditions and its application in CO2 absorption 绿色表面活性剂在盐水条件下稳定二氧化硅纳米流体的实验评价及其在CO2吸收中的应用

IF 1.6 4区工程技术

International Journal of Chemical Reactor Engineering Pub Date : 2023-08-10 DOI: 10.1515/ijcre-2022-0241

Alpana Singh, Krishna Raghav Chaturvedi, Tushar Sharma

{"title":"An experimental evaluation of green surfactants to stabilize silica nanofluids in saline conditions and its application in CO2 absorption","authors":"Alpana Singh, Krishna Raghav Chaturvedi, Tushar Sharma","doi":"10.1515/ijcre-2022-0241","DOIUrl":"https://doi.org/10.1515/ijcre-2022-0241","url":null,"abstract":"Abstract Conventionally, it has been established that the salt ions have the tendency to reduce the surface charge of nanoparticles (NPs) and render them unstable, regulating the stability of nanofluids in a saline environment has been an issue for a long time. To overcome this problem, our work presents the application of a novel green surfactant obtained from Fenugreek seeds of an anionic nature for use as a stabilizing agent for 0.1 wt% silica nanofluids prepared using in DI water. To prevent phase separation, it is imperative to stabilize silica nanofluid solution during their use for subsurface applications. Thus, salt tolerant nanofluids can be prepared and utilized for further applications in enhanced oil recovery and carbon storage etc. The surfactant was extracted from fenugreek seeds by using Soxhlet extraction technique. The liquid solution of extracted surfactant thus derived was dried in hot air oven in order to get the powdered surfactant. The results obtained from dynamic light scattering and zeta-potential, the use of the green surfactant, even in limited concentration (0.2 wt%) not only increases the stability of the nanofluid (from 2 to 12 h) but also lowers the influence of salt, if it is present in moderate concentration (up to 2 wt% NaCl). In addition, when 4 wt% NaCl is dissipated in the solution, the presence of surfactant allows the nanofluid to remain stable for up to 4 h. Furthermore, the surfactant-enriched silica NPs showed higher CO2 absorption than conventional NPs due to higher surface area and better bubble breakage, paving the way for future field deployment of green-surfactant stabilized silica nanofluids for gas storage and enhanced oil recovery applications.","PeriodicalId":51069,"journal":{"name":"International Journal of Chemical Reactor Engineering","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45900207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Single and multi-objective dynamic optimization study of an industrial scale fed batch reactor 工业规模间歇投料反应器单目标和多目标动态优化研究

IF 1.6 4区工程技术

International Journal of Chemical Reactor Engineering Pub Date : 2023-08-07 DOI: 10.1515/ijcre-2023-0009

Bhowmick Patidar, Nitin U. Padhiyar

引用次数: 0

Influence of different influence parameters on mixing characteristics of silicon particles in cassette 不同影响参数对硅颗粒在盒内混合特性的影响

IF 1.6 4区工程技术

International Journal of Chemical Reactor Engineering Pub Date : 2023-08-04 DOI: 10.1515/ijcre-2022-0217

Haifeng Fang, Han-xiao Sun, MingQiang Wang, R. Liu, Zheng Rong

{"title":"Influence of different influence parameters on mixing characteristics of silicon particles in cassette","authors":"Haifeng Fang, Han-xiao Sun, MingQiang Wang, R. Liu, Zheng Rong","doi":"10.1515/ijcre-2022-0217","DOIUrl":"https://doi.org/10.1515/ijcre-2022-0217","url":null,"abstract":"Abstract The numerical simulation length of the cassette model is determined by studying the effects of the cassette frame rotated alone and the rotated together with the agitator on mixing under different cassette lengths. The effects of different rotating speed, filling ratio of silicon particles, shape and number of agitators on the mixing characteristics of silicon particles in the cassette are studied when the outer frame of the cassette rotated alone and the cassette rotated together with the agitator. The mixing degree is quantitatively analyzed by particle trajectory, mixing index and rate, and the optimum working conditions of each influencing parameter are obtained. The results show that considering the computation time and the influence of the two motion modes on the mixing index and rate, the numerical simulation length of the cassette model is 115 mm. In order to obtain the best mixing effect and mixing speed, it is recommended that the rotating speed of the cassette is 8.91 rad/s, the filling rate is 23.60 %, and the shape of the agitator is rectangular and the number is 6. When the cassette and agitator rotate together, the filling rate has little effect on particle mixing. Considering the production efficiency, mixing effect and rate, as well as the stability of mixing, the recommended speed is 4.08 rad/s, the filling rate is 41.40 %, and the rectangular shape and number of six agitators are ideal choices.","PeriodicalId":51069,"journal":{"name":"International Journal of Chemical Reactor Engineering","volume":"0 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66992995","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Determining and modeling of density and viscosity of biodiesel-diesel and biodiesel-diesel-butanol blends 生物柴油-柴油和生物柴油-丁醇混合物密度和粘度的测定与建模

IF 1.6 4区工程技术

International Journal of Chemical Reactor Engineering Pub Date : 2023-07-20 DOI: 10.2139/ssrn.4141428

Milind H. Joshipura, P. Saxena, N. Shah, A. Dwivedi, S. Pillai, Madhu Aggrawal

{"title":"Determining and modeling of density and viscosity of biodiesel-diesel and biodiesel-diesel-butanol blends","authors":"Milind H. Joshipura, P. Saxena, N. Shah, A. Dwivedi, S. Pillai, Madhu Aggrawal","doi":"10.2139/ssrn.4141428","DOIUrl":"https://doi.org/10.2139/ssrn.4141428","url":null,"abstract":"Abstract In the present work jatropha, palm, and karanja-based biodiesel and diesel blends, as well as biodiesel diesel and butanol blends, were studied. 112 density data for biodiesel-diesel blends in the temperature range of 30–65 °C were generated. 651 data for viscosity for these blends were generated in the temperature range of 25–65 °C. Blends with butanol were studied only at room temperature. The addition of butanol has not made much of a difference in the density or viscosity of the blends. Empirical models available in the literature were fitted to the data. The linear model in volume fraction and temperature was accurate for density. A generalized model was proposed representing the density for the biodiesel/diesel blend comprising all three biodiesels. A new empirical model for viscosity was also proposed in the study. The proposed model performed well compared to other models, with % an OARD of 3.74 %. A generalized model for viscosity was also proposed. The generalized models could estimate the density and viscosity with % OARD of 0.673  and 5.25 %, respectively.","PeriodicalId":51069,"journal":{"name":"International Journal of Chemical Reactor Engineering","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43914008","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Green and recyclable mesoporous silica supported WO3–ZrO2 solid acid catalyst for biodiesel production by transesterification of Ankol seed oil with methanol 绿色可回收介孔二氧化硅负载WO3–ZrO2固体酸催化剂用于安康籽油与甲醇酯交换制备生物柴油

IF 1.6 4区工程技术

International Journal of Chemical Reactor Engineering Pub Date : 2023-07-17 DOI: 10.1515/ijcre-2023-0069

S. Manimaran, R. Tschentscher, A. Pandurangan, Gopalakrishnan Govindasamy

{"title":"Green and recyclable mesoporous silica supported WO3–ZrO2 solid acid catalyst for biodiesel production by transesterification of Ankol seed oil with methanol","authors":"S. Manimaran, R. Tschentscher, A. Pandurangan, Gopalakrishnan Govindasamy","doi":"10.1515/ijcre-2023-0069","DOIUrl":"https://doi.org/10.1515/ijcre-2023-0069","url":null,"abstract":"Abstract Biodiesel, an important sustainable fuel used in the transportation sector, demands a stable, recyclable and green catalyst for its economical and environmentally benign production. A novel green heterogeneous acid catalyst was developed by extracting sodium silicate from bamboo leaf ash (BLA), using which SBA-16 (BLA) was synthesized and then impregnated with 10 wt% each of WO3 and ZrO2, characterized and evaluated for the transesterification of Ankol seed oil with methanol to biodiesel. XRD, SEM, TEM and pore size characterization indicated that impregnated WO3 and ZrO2 were present outside the mesopores of SBA-16 (BLA) as monoclinic phases, thus 3D cubic cage-like Im3m mesopores of SBA-16 were unaltered. NH3-TPD indicated the presence of acid sites of two distinct strengths, attributed to the Lewis and Brønsted acidity of WO3–ZrO2 impregnated into SBA-16 (BLA) and hence gave the highest biodiesel yield of 98 %. In contrast 10 wt% of WO3 and 10 wt% of ZrO2 separately impregnated into SBA-16 gave 65  and 57 % of biodiesel yield respectively, possibly due to the presence of Lewis acidity alone in them. Among the WO3(10 %)–ZrO2(10 %) impregnated mesoporous supports viz. SBA-16 (BLA), SBA-16 (synthesized using tetraethyl orthosilicate), SBA-15, MCM-41, MCM-48, KIT-6, FDU-5, and TUD-1, the highest biodiesel yield of 98 % was given by SBA-16 (BLA), attributed to its spherical morphology and strong interaction with WO3–ZrO2 as inferred from SEM and XPS characterizations respectively. From the effect of process parameters on the WO3(10 %)–ZrO2(10 %)/SBA-16 (BLA) catalyst, maximum biodiesel yield was obtained at the temperature of 65 °C, catalyst amount of 200 mg, methanol:oil weight ratio of 10:1 and reaction time of 3 h. Under these reaction conditions, it retained the same biodiesel yield for six recycles after regeneration every time, confirmed its catalytic stability and recyclability.","PeriodicalId":51069,"journal":{"name":"International Journal of Chemical Reactor Engineering","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48153116","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

On the extremum dissipation for steady state incompressible flow past a sphere at low Reynolds number 低雷诺数下稳态不可压缩流过球的极限耗散

IF 1.6 4区工程技术

International Journal of Chemical Reactor Engineering Pub Date : 2023-07-17 DOI: 10.1515/ijcre-2023-0033

R. Arya, Devyani Thapliyal, A. Thakur, Rahul Kumar, G. Verros

引用次数: 0

Hydrocracking of hydrotreated light cycle oil for optimizing BTEX production: a simple kinetic model 加氢处理轻循环油加氢裂化优化BTEX生产的简单动力学模型

IF 1.6 4区工程技术

International Journal of Chemical Reactor Engineering Pub Date : 2023-07-12 DOI: 10.1515/ijcre-2022-0230

G. Laredo, Eli H. Olmos-Cerda, P. Pérez-Romo, Ricardo Águeda-Rangel, A. García-López

{"title":"Hydrocracking of hydrotreated light cycle oil for optimizing BTEX production: a simple kinetic model","authors":"G. Laredo, Eli H. Olmos-Cerda, P. Pérez-Romo, Ricardo Águeda-Rangel, A. García-López","doi":"10.1515/ijcre-2022-0230","DOIUrl":"https://doi.org/10.1515/ijcre-2022-0230","url":null,"abstract":"Abstract The effect of the experimental conditions on the hydrocracking (HCK) of a hydrotreated light cycle oil (HDT LCO) was studied in this work. The catalyst tested was a 50/50 weight mixture of nickel-molybdenum-phosphorous on alumina (NiMo/Al2O3) and a commercial ZSM5 zeolite (HCK 50/50). The experimental conditions tested were 340, 350, 360, and 370 °C; 7.5 MPa; 0.9, 1.2, 1.5, and 1.8 h−1 LHSV, and H2/HC of 752 m3/m3. Two phases: gas and liquid, were obtained as HDK products. The gas phase consisted mostly of C1–C5 paraffins, iso-paraffins, and olefins. The liquid phase was characterized by GC-PIONA and was distributed in lumps as follows: NAPA by C11 to C13-naphthalenes; TET by C11 to C13-tetralins; IND by C9 to C13-indanes and indenes; AKB by C9 to C13-alkylbenzenes; BTEX by benzene, toluene, ethylbenzene, and xylenes; NAPE by C9 to C13-naphthenes; and PIP by C3 to C14 paraffin, iso-paraffin, and olefin type hydrocarbons. Using this classification, the results showed that increments in temperature and decrements in LHSV produced increments in the formation of gases, PIP, BTEX, and NAPE. At the same conditions, AKB, TET, NAPA, and IND decreased sharply. TET and NAPA derivatives were no longer present at high temperatures (360–370 °C). It seemed to be a limit of the BTEX formation directly related to the TET and IND presence, and it did not seem to depend on the transalkylation process of AKB hydrocarbons. Instead, AKB hydrocarbons were directly correlated to NAPE hydrocarbon formation by hydrogenation. A kinetic model was prepared. The model presented correlation coefficients higher than 98 %. The kinetic model that was made predicted that neither increasing the temperature nor lowering the LHSV would improve the BTEX formation when departing from this feedstock.","PeriodicalId":51069,"journal":{"name":"International Journal of Chemical Reactor Engineering","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45737254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical investigations on hydrothermal flame characteristics of water-cooled hydrothermal burner 水冷式水热燃烧器水热火焰特性的数值研究

IF 1.6 4区工程技术

International Journal of Chemical Reactor Engineering Pub Date : 2023-07-11 DOI: 10.1515/ijcre-2023-0040

Yiran Geng, Shuzhong Wang, Fan Zhang, Zicheng Li, Xinyin Zhang, Yanhui Li, Wenqiang He

{"title":"Numerical investigations on hydrothermal flame characteristics of water-cooled hydrothermal burner","authors":"Yiran Geng, Shuzhong Wang, Fan Zhang, Zicheng Li, Xinyin Zhang, Yanhui Li, Wenqiang He","doi":"10.1515/ijcre-2023-0040","DOIUrl":"https://doi.org/10.1515/ijcre-2023-0040","url":null,"abstract":"Abstract Supercritical hydrothermal combustion, as a quick homogeneous oxidizing process, offers a promising treatment option for industrial wastewater. This paper established a computational fluid dynamics model of a water-cooled hydrothermal combustion burner to investigate the thermal flame characteristics. The effects of the fuel mass flow rate, fuel concentration, initial reactor temperature, reaction pressure, and oxidant temperature on the thermal combustion ignition were revealed. The results indicate that the fuel concentration (from 10 wt% to 60 wt%) and initial reactor temperature (from 623 to 773 K) had less effect on the ignition temperature. In contrast, the ignition temperature increases by 398 K with increasing fuel mass flow rate (from 24 kg h−1 to 1080 kg h−1). As the oxygen temperature increases (from 273 to 673 K), the ignition temperature gradually decreases to 573 K and then increases. An increase in reaction pressure can facilitate a decrease in ignition temperature to a certain extent, and the optimal reaction pressure is 25 MPa. This study provides a vital reference for a hydrothermal burner’s scale-up design and ignition operation.","PeriodicalId":51069,"journal":{"name":"International Journal of Chemical Reactor Engineering","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49049433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hydrodynamic comparison of different geometries of square cross-section airlift bioreactor using computational fluid dynamics 用计算流体力学比较不同几何形状的方形横截面气升生物反应器

IF 1.6 4区工程技术

International Journal of Chemical Reactor Engineering Pub Date : 2023-07-07 DOI: 10.1515/ijcre-2023-0010

M. Esperança, M. Cerri, V. T. Mazziero, R. Béttega, A. C. Badino

{"title":"Hydrodynamic comparison of different geometries of square cross-section airlift bioreactor using computational fluid dynamics","authors":"M. Esperança, M. Cerri, V. T. Mazziero, R. Béttega, A. C. Badino","doi":"10.1515/ijcre-2023-0010","DOIUrl":"https://doi.org/10.1515/ijcre-2023-0010","url":null,"abstract":"Abstract The hydrodynamics of airlift bioreactors, which offer an interesting alternative to conventional stirred-tank bioreactors, has generally been evaluated using experimental approaches, requiring time, energy, and reagents. However, computational fluid dynamics (CFD) has emerged as an important and valuable tool for the analysis and design of these devices, saving time and experimental effort, while providing a large amount of information. In this study, four geometries of a square cross-section 10-L split airlift bioreactor operating with distilled water were simulated using CFD, and the hydrodynamics variables gas hold-up and liquid velocity were evaluated. CFD satisfactorily predicted the hydrodynamic parameters, when compared to experimental data, allowing adequate prediction of the shear rate distribution in airlift bioreactors. The results indicated that different shear rate distributions were obtained by geometric modifications in the bioreactor, showing that its design should be considered to satisfy different specific bioprocess requirements.","PeriodicalId":51069,"journal":{"name":"International Journal of Chemical Reactor Engineering","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45652388","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preparation of bimodal mesoporous CoCe composite oxide for ethanol complete oxidation in air 用于乙醇在空气中完全氧化的双峰介孔CoCe复合氧化物的制备

IF 1.6 4区工程技术

International Journal of Chemical Reactor Engineering Pub Date : 2023-07-07 DOI: 10.1515/ijcre-2023-0037

Hongmei Xie, Sijia Song, Jia Zeng, Guizhi Zhang, Shuang Chen

{"title":"Preparation of bimodal mesoporous CoCe composite oxide for ethanol complete oxidation in air","authors":"Hongmei Xie, Sijia Song, Jia Zeng, Guizhi Zhang, Shuang Chen","doi":"10.1515/ijcre-2023-0037","DOIUrl":"https://doi.org/10.1515/ijcre-2023-0037","url":null,"abstract":"Abstract The CeO2 and CeCoO composite oxide catalysts with bimodal mesopore structures were prepared by hard-template method and used for ethanol complete oxidation in air. The physicochemicalphysicochemical properties of the prepared catalysts were characterized by XRD, BET, TEM, XPS, H2-TPR, and O2-TPD. The Co species can be dissolved into CeO2 lattice to form Ce–O–Co solid solution, which promotes reactive oxygen species to be formed on the prepared CeCoO oxide catalysts surface. The bimodal mesopore structures can be obtained by the used hard-template method, and the pore structures of the prepared CeCoO oxide catalysts can be affected by the introduction of Co species. The synergistic effects from bimodal mesopore structures and reactive oxygen species can effectively boost ethanol complete oxidation to final product CO2. The CeCo2 catalyst with Ce/Co mole ratio of 2.0 exhibites superior ethanol complete oxidation activity and service stability, the ethanol oxidation conversion and final oxidation product CO2 selectivity reached 99.8 % and 99.2 % at 200 °C, respectively. This work indicates that the bimodal mesoporous CeCoO solid solution composite oxide catalyst is a promising candidate for OVOCs oxidation elimination from air.","PeriodicalId":51069,"journal":{"name":"International Journal of Chemical Reactor Engineering","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48695879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0