International Journal of Chemical Reactor Engineering最新文献_第7页

De–NO x conversion of selective catalytic reduction system for diesel engine using dual catalyst coated ceramic monoliths 采用双催化剂涂层陶瓷单体的柴油发动机选择性催化还原系统的脱硝转化

IF 1.6 4区工程技术

International Journal of Chemical Reactor Engineering Pub Date : 2023-05-09 DOI: 10.1515/ijcre-2023-0027

Devakaran Karaiellapalayam Palanisamy, A. Jayabalan

{"title":"De–NO x conversion of selective catalytic reduction system for diesel engine using dual catalyst coated ceramic monoliths","authors":"Devakaran Karaiellapalayam Palanisamy, A. Jayabalan","doi":"10.1515/ijcre-2023-0027","DOIUrl":"https://doi.org/10.1515/ijcre-2023-0027","url":null,"abstract":"Abstract Selective Catalytic Reduction (SCR) is a well-known method for reducing Oxides of Nitrogen (NO x ) emissions from the exhaust manifold of the engine. Retrofitting SCR system to the diesel engines and, enhancing the catalyst activity along with injection controller of this system has become necessary because of stringent emission standards. In this work, dual catalyst is used to increase catalytic activity and, controlled urea injection is applied to decrease the slip of SCR system for stationary diesel engine. First, a pair of ceramic monolith substrate is selected and, coated with cerium oxide and Cu–zeolite for oxidation and SCR catalyst, respectively. XRD, BET and TGA–DSC are used to analyze the structural, and electrochemical behavior of the synthesized catalyst. The morphology and element composition of dual catalyst coated over the substrates are studied using FE-SEM and XEDS. Second, the thermocouple and rotary encoder are used to control the injector of SCR system, which injects the urea when the burned NO x leaves the engine exhaust manifold and enters the SCR. Finally, the diesel engine performance indicators and emission reduction due to the SCR system are evaluated under Non Road Steady Cycle (NRSC). From the experimental results, it is observed that the combined action of catalyst provides wide operating range between 153 and 425 °C and, controlled urea injection at 220° of exhaust valve opening with rate of 24.44 ms per cycle achieved a high De–NO x conversion efficiency of 93.4 % for SCR system, with a marginal reduction in engine Brake Thermal Efficiency (BTE) at maximum Brake Power (BP) condition. Thus, diesel engine exhaust retrofitted with SCR system proposed in this work will meet the Euro-VI emission standards.","PeriodicalId":51069,"journal":{"name":"International Journal of Chemical Reactor Engineering","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41689531","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

Modeling and simulation of trickle bed reactors for the purification of 1-butene 1-丁烯净化滴流床反应器的建模与仿真

IF 1.6 4区工程技术

International Journal of Chemical Reactor Engineering Pub Date : 2023-04-26 DOI: 10.1515/ijcre-2022-0191

J. A. Alves, Germán García Colli, O. M. Martinez, G. Barreto

{"title":"Modeling and simulation of trickle bed reactors for the purification of 1-butene","authors":"J. A. Alves, Germán García Colli, O. M. Martinez, G. Barreto","doi":"10.1515/ijcre-2022-0191","DOIUrl":"https://doi.org/10.1515/ijcre-2022-0191","url":null,"abstract":"Abstract In this contribution, a mathematical model of an industrial trickle-bed reactor employed in the purification of a C4 cut by selective hydrogenation of acetylenic or dienes compounds to obtain high purity 1-butene is presented. A reaction network of ten reactions is included in the model, with kinetics expressions and parameter estimation obtained from previous experimental studies on a commercial catalyst. Internal mass transfer resistances in the catalyst particles are significant; therefore the reaction-diffusion equations must be solved. External mass transfer resistances in the liquid phase were retained, while those in the vapor phase were negligible. The model was employed to analyze the reactor behavior by varying the inlet molar flow rate of hydrogen, the operating pressure, inlet temperature and the level of activity of the catalyst, taking into account its deactivation. It was demonstrated that the mass transfer resistances, inside and outside the catalyst particles, have a significant impact on the selectivity, but a careful operation of the reactor can improve the selectivity and extent the catalyst life. On the other hand, an alternative system was proposed, with two beds and a distributed input of H2, which led to a significant improvement in the selectivity.","PeriodicalId":51069,"journal":{"name":"International Journal of Chemical Reactor Engineering","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45777505","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

Enhancement investigation of mass transfer and mixing performance in the static mixers with three twisted leaves 三扭叶静态混合器传质与混合性能的强化研究

IF 1.6 4区工程技术

International Journal of Chemical Reactor Engineering Pub Date : 2023-04-07 DOI: 10.1515/ijcre-2023-0021

Yanfang Yu, Y. Li, Huibo Meng, Huanchen Liu, Bo Li, DeAo Li

{"title":"Enhancement investigation of mass transfer and mixing performance in the static mixers with three twisted leaves","authors":"Yanfang Yu, Y. Li, Huibo Meng, Huanchen Liu, Bo Li, DeAo Li","doi":"10.1515/ijcre-2023-0021","DOIUrl":"https://doi.org/10.1515/ijcre-2023-0021","url":null,"abstract":"Abstract The mass transfer and mixing performance in the static mixers with three twisted leaves (TKSM) were investigated by the computational fluid dynamics coupled population balance model. A high-precision and efficient gas-liquid two phase model were evaluated by considering several drag models based on experimental bubble size distributions. The bubble size prediction matched well with experimental data and the mean relative error of Sauter mean diameter (d32) between the prediction and experiment values is 4.93 %. The drag correction factor considering hindering effect of small bubbles can improve the accuracy of cumulative probability distribution (CPD) prediction by 10.06 %. Bubble breakup capacity is quantized via gas-liquid interfacial area, and an empirical correlation between Eo and bubble aspect ratio (γ) have been proposed to predict morphological characteristics of bubble swarms. The effect of liquid Re on the mass transfer rate is much more significant than that of gas volume fraction (αd). The coefficients of variation profiles show that RL-TKSM has better mixing efficiency compared with LL-TKSM and perfect mixing could be achieved after seven mixing elements. The micro mixing efficiency of RL-TKSM is 1.06–1.14 times that of LL-TKSM, which indicates that RL-TKSM has excellent mixing and mass transfer performances.","PeriodicalId":51069,"journal":{"name":"International Journal of Chemical Reactor Engineering","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43510368","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

Smith-predictor based enhanced Dual-DOF fractional order control for integrating type CSTRs 基于smith预测器的积分型cstr增强双自由度分数阶控制

IF 1.6 4区工程技术

International Journal of Chemical Reactor Engineering Pub Date : 2023-04-03 DOI: 10.1515/ijcre-2022-0216

Rammurti Meena, Dipjyoti Das, Vipin Chandra Pal, S. Chakraborty

{"title":"Smith-predictor based enhanced Dual-DOF fractional order control for integrating type CSTRs","authors":"Rammurti Meena, Dipjyoti Das, Vipin Chandra Pal, S. Chakraborty","doi":"10.1515/ijcre-2022-0216","DOIUrl":"https://doi.org/10.1515/ijcre-2022-0216","url":null,"abstract":"Abstract Continuously Stirred Tank Reactors (CSTR) are one of the widely used reactors in the chemical industry. Controlling such reactors is challenging because many times it demonstrates a model which is having a pole at the origin of the s-plane. Moreover, the presence of a dead time necessitates more effective control measures. This work presents a modified smith predictor-based control for integrating type CSTRs with time delay in order to provide adequate servo and regulatory closed-loop responses. Numerous researches on dual DOF control suggested different controller settings for outer and inner-loop controllers. But, in the current study, both the controllers are proposed to be the same which drastically reduces the complexity of the design. To offer good robustness in the closed-loop response, the controller is synthesized with a user-defined maximum sensitivity. Case studies on CSTRs for both the nominal and disturbed process models are conducted and the same is compared with recently developed control laws. Lastly, a performance comparison on ISE, ITAE, and IAE is provided.","PeriodicalId":51069,"journal":{"name":"International Journal of Chemical Reactor Engineering","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42098931","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: 1

Investigation into a multiple input/output bifurcated biochemical reaction with substrate inhibition in a real CSTR based on Cholette’s model 基于Cholette模型的CSTR中底物抑制的多输入/输出分叉生化反应研究

IF 1.6 4区工程技术

International Journal of Chemical Reactor Engineering Pub Date : 2023-03-28 DOI: 10.1515/ijcre-2022-0176

C. Yang, Ding-Chi Tsai, Yu-Shu Chien

{"title":"Investigation into a multiple input/output bifurcated biochemical reaction with substrate inhibition in a real CSTR based on Cholette’s model","authors":"C. Yang, Ding-Chi Tsai, Yu-Shu Chien","doi":"10.1515/ijcre-2022-0176","DOIUrl":"https://doi.org/10.1515/ijcre-2022-0176","url":null,"abstract":"Abstract CSTR operations entailing high nonlinearity and complexity such as multiple input and output steady-states present a real challenge to chemical engineers and process designers. The input multiplicity in chemical reactions leads to control probems such as process instability and low efficiency. Therefore, it is of critical importance to predict and avoid the multiplicity regions during reactor operation. Since the bifurcation analysis of biochemical processes with nonideal mixing has been carried out by the authors in the previous publication (Yang, C. Y., D. C. Tsai, and Y. S. Chien. 2021. “The Strategy Developed for High Conversion and the Multiplicity Problems of Biochemical Reaction in a Real CSTR with Cholette’s Model.” International Journal of Chemical Reactor Engineering 19: 1245–70), the goal of the present work is to use Sturm’s method, Routh stability criteria and the discriminator roots method with the tangent analysis method to derive the input multiplicity conditions in substrate inhibition in a real CSTR based on Chollete’s model. Four kinetic schemes are used in the analysis as examples to show that all three methods can precisely obtain the bifurcation starting point for the input multiplicity. In addition to the multiple input steady-states, the start-up diagram obtained by the discriminator root method is of critical importance to avoid operating in the input multiplicity regions.","PeriodicalId":51069,"journal":{"name":"International Journal of Chemical Reactor Engineering","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47983796","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

Preface of the special issue dedicated to the International Energy Conference, IEC 2021: sustainable energy as a platform for post-pandemic economic recovery 国际能源大会特刊前言，IEC 2021：可持续能源作为疫情后经济复苏的平台

IF 1.6 4区工程技术

International Journal of Chemical Reactor Engineering Pub Date : 2023-03-22 DOI: 10.1515/ijcre-2023-0053

M. González‐Brambila, C. Castillo-Araiza

引用次数: 0

Two-stage adsorber design for malachite green and methylene blue removal using adsorbents derived from banana peel 利用香蕉皮提取的吸附剂去除孔雀石绿和亚甲基蓝的两级吸附器设计

IF 1.6 4区工程技术

International Journal of Chemical Reactor Engineering Pub Date : 2023-03-17 DOI: 10.1515/ijcre-2022-0204

Eng Hock Pua, Azrul Nurfaiz Mohd Faizal, S. Lawal, M. Zaini

引用次数: 0

Eco friendly synthesis of epoxidized palm oleic acid in acidic ion exchange resin 在酸性离子交换树脂中环保合成环氧化棕榈油酸

IF 1.6 4区工程技术

International Journal of Chemical Reactor Engineering Pub Date : 2023-03-14 DOI: 10.1515/ijcre-2023-0017

M. Rahman, I. S. Azmi, Mohd Zulkipli Ab Kadir, Noorfazlida Mohamed, M. Jalil

{"title":"Eco friendly synthesis of epoxidized palm oleic acid in acidic ion exchange resin","authors":"M. Rahman, I. S. Azmi, Mohd Zulkipli Ab Kadir, Noorfazlida Mohamed, M. Jalil","doi":"10.1515/ijcre-2023-0017","DOIUrl":"https://doi.org/10.1515/ijcre-2023-0017","url":null,"abstract":"Abstract Global raw material use has moved from a non-renewable to a renewable resource. Additionally, the research on epoxidation has produced a safer, more cost-effective, and ecologically friendly product than non-renewable resources. At present, there are limited studies on the production of epoxidized palm oleic acid using eco-friendly ion exchange resin method. Consequently, the objective of this study is to optimise the reaction conditions of epoxidation palm oleic acid using ion exchange resin (amberlite IR 120H) as a catalyst. Epoxidized palm oleic acid was prepared using performic acid formed in situ by mixing formic acid with hydrogen peroxide. The results showed that the optimum reaction conditions for the production of oxirane content were a temperature of 75 °C and a hydrogen peroxide concentration of 30%. The maximum relative conversion of palm oleic acid to oxirane was achieved using the optimum conditions with up to 75%. Finally, a mathematical model was developed using MATLAB and the fourth-order Runge–Kutta method was integrated with the genetic algorithm to determine the reaction rate, which was consistent with the experimental data. This study proved that palm oleic acid was successfully converted into a green epoxide that promotes the use of palm oil as a raw material.","PeriodicalId":51069,"journal":{"name":"International Journal of Chemical Reactor Engineering","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46390724","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

Performance of photocatalytic oxidation surface with new geometry for indoor environment application: experimental and simulation 新型几何光催化氧化表面在室内环境中的应用性能：实验与模拟

IF 1.6 4区工程技术

International Journal of Chemical Reactor Engineering Pub Date : 2023-03-06 DOI: 10.1515/ijcre-2022-0173

Fateme Khoshpasand, A. Nikpay, Mehrdad Keshavarz

{"title":"Performance of photocatalytic oxidation surface with new geometry for indoor environment application: experimental and simulation","authors":"Fateme Khoshpasand, A. Nikpay, Mehrdad Keshavarz","doi":"10.1515/ijcre-2022-0173","DOIUrl":"https://doi.org/10.1515/ijcre-2022-0173","url":null,"abstract":"Abstract Many studies of the photocatalytic oxidation process investigated on the removal efficiency and other variables of the input and output photoreactor. In the laboratory scale, it’s impossible, examination of the removal efficiency details, such as mass and energy transfer with air flow rate. Also, experimental methods request time consumption and money. For this reason, the simulation method can be used. The aim of this study was to prove that the validation of modeling approach in the photocatalytic oxidation process in the removal of toluene from air. Investigation of bed surface morphology, with FESEM, BET and TGA, shows acceptable monotonous of TiO2 nanoparticles on the ss plate. Furthermore, it was observed good adherence of nanoparticles on it. Experimental results on photocatalytic bed surface exhibited in the toluene concentration range of 10–40 ppm and flow rate of 2–5 l/min, with increasing flow and decreasing concentration, removal efficiency increased. The optimum removal point was 59% and 25 g/m3 min for 3.75 ppm and 5.61 l/min. For bed surface performance, the correlation between experimental results and simulation data was obtained 98%. According to the results, the photocatalytic oxidation process performed well for removal of low concentration of toluene from air. In addition, the obtained simulation method eliminated the random factors which can be affected by photocatalytic bed surface and it can show dependence of results based on reality.","PeriodicalId":51069,"journal":{"name":"International Journal of Chemical Reactor Engineering","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46496063","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

Value-added biochar production from microwave pyrolysis of peanut shell 微波热解花生壳制备生物炭的研究

IF 1.6 4区工程技术

International Journal of Chemical Reactor Engineering Pub Date : 2023-03-03 DOI: 10.1515/ijcre-2023-0005

Sichen Fan, Longfei Cui, Hui Li, Mengmeng Guang, Hui Liu, Tianhao Qiu, Yaning Zhang

{"title":"Value-added biochar production from microwave pyrolysis of peanut shell","authors":"Sichen Fan, Longfei Cui, Hui Li, Mengmeng Guang, Hui Liu, Tianhao Qiu, Yaning Zhang","doi":"10.1515/ijcre-2023-0005","DOIUrl":"https://doi.org/10.1515/ijcre-2023-0005","url":null,"abstract":"Abstract In order to seek efficient resource utilization, the carbonization of agricultural and forestry wastes through microwave pyrolysis technology is an important research hotspot to develop value-added products. The main objective is to produce value-added biochar through microwave pyrolysis of peanut shell in this study. The product yields, functional groups, and biochar HHVs caused by pyrolysis temperature (400, 450, 500, 550, and 600 °C), microwave power (350, 450, 550, 650, and 750 W), and residence time (10, 20, 30, 40, and 50 min) were investigated, and the energy recovery efficiencies were evaluated. It was obtained that the biochar yield declined monotonously within the range of 45.3–86.0 wt% with the enhancement of pyrolysis temperature, microwave power, or residence time. The pyrolysis temperature of 400 °C, microwave power of 350 W, and residence time of 10 min generated the maximum biochar yield (86.0 wt%). The value-added biochar was obtained with high HHV (20.15–31.02 MJ/kg) and abundant oxygen-contained functional groups (C–O bonds and C=O bonds). The maximum energy recovery efficiency during the whole process reached 97.96%. The results indicated that the peanut shell could reach high biochar yield through microwave pyrolysis, and potentially be transformed into value-added products with high energy recovery efficiency.","PeriodicalId":51069,"journal":{"name":"International Journal of Chemical Reactor Engineering","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42944203","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: 1