首页期刊导航|Journal of the Taiwan Institute of Chemical Engineers
期刊信息/Journal information
Journal of the Taiwan Institute of Chemical Engineers
c/o Department of Chemical Engineering, National Taiwan University
Journal of the Taiwan Institute of Chemical Engineers

c/o Department of Chemical Engineering, National Taiwan University

1876-1070

Journal of the Taiwan Institute of Chemical Engineers/Journal Journal of the Taiwan Institute of Chemical EngineersEISCIISTP
正式出版
收录年代

    CFD simulation of hydrodynamics characteristics in a tank with forward-reverse rotating impeller

    Li, LiangchaoXu, Bin
    13页
    查看更多>>摘要：Background: A forward-reverse rotating impeller was used in an unbaffled tank to improve the mixing efficiency. Flow field and power characteristics in the tank were numerically studied. Methods: Computational fluid dynamics(CFD) simulations were performed to investigate hydrodynamics in the unbaffled tank. The Reynolds stress turbulence (RST) model along with a sliding mesh approach was used to predict instantaneous flow fields in the stirred tank. Significant findings: Fluid in the unbaffled tank flows periodically with the forward-reverse impeller agitation. Zonal flow phenomenon was found for the fluid affected by agitation in different directions. The effects of operating conditions on instantaneous fluid velocity vary with positions in the tank. Flow field characteristics in the forward-reverse agitated unbaffled tank are very different from those in constant agitated unbaffled and baffled tanks. Generally, transient power consumption is only the function of its corresponding transient rotational speed. The averaged impeller power number is a constant and is not affected by maximum rotational speed and cycle time. The averaged power number is the largest in the unbaffled tank with forwardreverse agitation, followed by the baffled tank at a constant agitation, and the smallest in the unbaffled tank at a constant impeller speed. (C) 2021 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
      原文链接:
    • NSTL
    • Elsevier

    The effect of reducing gases on raw iron ore catalyst for Fischer-Tropsch synthesis

    Ramutsindela, Franscina K.Okoye-Chine, Chike G.Mbuya, Christel O. L.Mubenesha, Samuel...
    7页
    查看更多>>摘要：Background: Catalyst replacement is one of the significant costs of the Fischer-Tropsch (FT) synthesis Operational Expenses (OPEX) that needs to be considered to make the process viable, necessitating the need to explore cheaper options precursors such as iron ore. Methods: In this study, raw iron ore catalyst was ground and sieved into 1-2 mm particle sizes then characterized using different characterization techniques. TPR studies were carried out on the catalyst using three different reducing agents: hydrogen (H-2), carbon monoxide (CO), and syngas (a mixture of H-2 and CO). In addition, the catalyst was reduced in situ with three different reducing agents and tested for FT synthesis at the same operating conditions. The TPR results were linked to the raw iron ore FT activity to probe the effect of the reducing agent(s) on the catalytic performance. Significant findings: The TPR showed that the raw iron ore reduced with CO requires a lower temperature for complete reduction than when H-2 or syngas are used as reducing agents. The CO reduced catalyst exhibited the highest CO conversion of 94.1%, followed by the H-2 reduced catalyst with CO conversion of 80.1%, and while the syngas reduced catalyst showed the least CO conversion of 54.1%. (C) 2021 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
      原文链接:
    • NSTL
    • Elsevier

    Corn stover conversion into bioethanol and xylitol through an integral bioprocess: Kinetic study and modelling

    Hodaifa, GassanMartinez Nieto, LeopoldoKowalska, Malgorzata
    13页
    查看更多>>摘要：Background: Corn stover residue is an important lignocellulosic material with a biochemical composition that arouses an interest in transforming into bioethanol and high added value product, such as e.g., xylitol. Methods: Hydrolysis experiments were carried out in a semi-pilot reactor of 12 L capacity. Fermentation experiments were conducted in a 1 L batch bioreactor capacity. Detailed kinetic study of the Candida guilliermondii NRC 5578 growth was carried out. Fermentation and the xylitol production process were modelled. Significant Findings: The used crude corn stover residue was composed of 11.1 % of lignin, 27.1 % of hemicellulose, 32.6 % cellulose, 24.5 % pentosanes, and 33.0 % of alpha-cellulose. Reconditioning liquid fractions of prehydrolysate and hydrolysate at 1.4 % (w/v) of H2SO4 were determined for the prehydrolysate 5.31 g/L, 9.07 g/L, 3.07 g/L, 11.2 g/L, 3.24 g/L, 3.89 and 2.56 g/L for pentoses, hexoses, arabinose, xylose, mannose, glucose, and fructose, respectively, and for hydrolysate 15.2 g/L of glucose. The higher values of maximum specific growth rate were registered for control experiments and compared to prehydrolysated and hydrolysated cultures. The highest ethanol formation rates of 2.29 g/(g L) and 0.117 g/(g L) in synthetic and hydrolysated cultures, respectively, were registered when 7 g/L glucose was used as carbon source. (C) 2022 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
      原文链接:
    • NSTL
    • Elsevier

    Seed-assisted synthesis of SAPO-34 zeolites: Genetic effect of seeds

    He, PengZhang, RuiMeng, XianghaiYue, Yuanyuan...
    11页
    查看更多>>摘要：Background: In the past decades, seed-assisted synthesis of zeolites has become one of the research focuses. Understanding the effect of the seeds on their derived products, and thus tuning the physicochemical properties of those products by selecting suitable seeds is pivotal for synthesizing zeolites via seed-assisted method. Methods: In this work, four kinds of SAPO-34 with different physicochemical properties were synthesized and used as seeds to prepare their corresponding products via the seed-assisted method. The physicochemical properties of the seeds and the corresponding products were characterized by XRD, SEM, N-2 adsorption-desorption, NH3-TPD, and Si-29 MAS NMR techniques. Significant Findings: The results showed that the particle size, textural and acidity properties, and the silicon coordination of the seed-derived products are strongly correlated to their corresponding seeds, exhibiting genetic effects. By investigating the crystallization kinetics, we speculated that the genetic effects should be attributed to the incomplete dissolution of the seeds. During the crystallization process, the incompletely dissolved seed fragments are directly incorporated into the product and serve as models. These models then require the final zeolites to grow according to their patterns, retaining and inheriting their original characteristics. (C) 2022 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
      原文链接:
    • NSTL
    • Elsevier

    One-step route to alpha-Bi2O3/BiOX (X = Cl, Br) heterojunctions with Bi2O3 ultrafine nanotubes closely adhered to BiOX nanosheets

    Liu, Huan-ZhenHan, Qiao-FengDing, Hui-WeiYu, Hui-Mei...
    10页
    查看更多>>摘要：Background: Developing efficient photocatalysts is identified as one of the most promising methods for removing pollutants under sunlight. It is significant and challenging to explore an easy one-step route to fabricate alpha-Bi2O3/BiOX heterojunction with optimized microstructure and photocatalytic performance. Methods: alpha-Bi2O3/BiOX (X = Cl, Br) heterojunctions were synthesized successfully via a facile one-step water bath route at 50 degrees C with pH similar to 11.3 for 2 h, and the possible photocatalytic mechanism was investigated through active species trapping experiments. Significant Findings: Significant Findings The heterojunction alpha-Bi2O3/BiOBr-0.375 exhibited excellent photocatalytic performance for the degradation of antibiotic tetracycline (TC) and rhodamine B (RhB), which could be completely removed within 80 min and 120 min of visible-light illumination, respectively. Especially, the photodegradation efficiency of TC could reach 88.8% within the first 10 min of irradiation. In addition, the asobtained alpha-Bi2O3/BiOCl-1 also presented preeminent visible-light photocatalytic performance for TC and RhB removal. Compared with the reported two-step method for the preparation of alpha-Bi2O3/BiOX, the onestep method generated embedded structures due to the co-nucleation and crystallization of alpha-Bi2O3 and BiOX, where, alpha-Bi2O3 ultrafine nanotubes were closely adhered to BiOX nanosheets, which thus greatly benefits the separation and migration of photogenerated carriers and the improvement of photocatalytic performance. (C) 2021 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
      原文链接:
    • NSTL
    • Elsevier

    Kinetic model studies of controlled nutrient release and swelling behavior of combo hydrogel using Acer platanoides cellulose

    Rizwan, MuhammadGilani, Syeda RubinaNaseem, SobiaDurrani, Arjumand Iqbal...
    11页
    查看更多>>摘要：Background: Sustainable agriculture exclusively relies on the effective management of fertilizers and plays a significant role in reducing environmental threats. Herein, using a controlled release combo hydrogel (CRCH) can improve agronomy practices by increasing nutrient availability and thereby enhancing plant growth. It is accomplished by fabricating a CRCH and coating over the essential nutrient fertilizers to get significant results. Method: The CRCH fabrication comprises cellulose extraction from Acer platanoides and incorporating with acrylic acid (AA) and n-isopropyl acrylamide (nIPAM) in the presence of initiator (K2S2O8) and a crosslinker MBA to develop a 3D crosslinked polymeric structure. Extracted cellulose and controlled release combo hydrogel were characterized by FTIR, XRD, and TGA. Significant findings: Kinetic study of swelling and nutrient release, using Korsmeyer-Peppa Model, explained that the diffusion process took place through non-fickian mechanism and fitting of other kinetic models also evaluated. CRCH showed 88.8%, 74.4%, and 60.1% swelling ratio in deionized water, tap water, and in 0.9% NaCl solution respectively. An analysis of nutrient release profiles in deionized water, NaCl, and CaCl2 revealed that phosphorus has a relatively slower release than nitrogen. The findings coincide with other studies and proved its controlled nutrient release behavior that is valuable for agriculture. (C) 2021 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
      原文链接:
    • NSTL
    • Elsevier

    Insight into the Elemental Sulfur Corrosion of Carbon Steel in Chloride Bearing Media Using Electrochemical and Non-electrochemical Techniques

    Erfanian, AsiehMoayed, Mohammad HadiMirjalili, MostafaPahlavan, Sohrab...
    12页
    查看更多>>摘要：Background: This paper studies elemental sulfur-induced corrosion of carbon steel in chloride bearing media. The issue is of great importance in industries dealing with sour gas environment and its mechanism is yet not entirely understood. Methods: The aim of this study was sought using various electrochemical (such as potentiodynamic polarization, linear polarization resistance technique, electrochemical impedance spectroscopy and zero resistance ammeter technique) and non-electrochemical techniques (such as scanning electron microscopy and Raman spectroscopy). Findings: It was found that reduction of dissolved oxygen is not the main cathodic reaction in the process of the sulfur-induced corrosion. Besides, severe corrosion primarily occurs at near peripheral region of sulfur deposition, leading to formation of a ring of FeS. However, the FeS accumulation reduces the corrosion rate, over the time. In the long term, a galvanic couple is established between the near peripheral and remote regions of the sulfur deposition. Occurrence of the consequent galvanic corrosion could cause severe corrosion at the regions which are far from the sulfur deposition and are not influenced by the sulfur-based species. (C) 2021 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
      原文链接:
    • NSTL
    • Elsevier

    Simultaneous separation of ternary mixture using modified dual compression middle vessel batch distillation column: Control and dynamic optimization

    Desikan, BharathKrishna, PranavRao, Chinta Sankar
    14页
    查看更多>>摘要：Background: Multivessel batch distillation has been found to be an effective method for the separation of multi-component mixtures. In this article, an effort has been made to devise a fast middle vessel batch distillation column (MVBDC) for the ternary separation of an Ethanol/Propanol/Butanol mixture by the means of inducing vapor compression in the system. Methods: ASPEN PLUS V12 has been used to generate the initial steady-state flowsheet of the process for equipment sizing. In contrast, ASPEN Dynamics was used to evaluate the performance of the batch distillation with various control structures and to perform a dynamic optimization on the proposed batch distillation column. MATLAB was used to identify single-input single-output transfer functions for more effective PID controller tuning. Significant Findings: The proposed Middle vessel batch distillation was found to separate each component of the mixture to a purity of 99 mol% in 22 h (for the cascade control structures) and 21.73 h (for the temperature control structure). This was found to be significantly lesser than the batch time of a conventional batch distillation column (28.12 h), while the energy consumed by the proposed column was 3.4 MMkcal lesser than the energy consumed by the conventional column. Dynamic optimization further reduced the batch time by 14.4% while simultaneously reducing the energy consumed by 20.3%. (C) 2022 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
      原文链接:
    • NSTL
    • Elsevier

    Modulating C(5+)selectivity for Fischer-Tropsch synthesis by tuning pyrolysis temperature of MOFs derived Fe-based catalyst

    Nisa, Mehar U.Chen, YaoLi, XinJiang, Xiangning...
    11页
    查看更多>>摘要：Background: Fischer-Tropsch synthesis have been of great importance since decades to yield efficient catalysts for C5+ products. High C5+ selectivity is often at the expense of reduced CO conversion which is tried to overcome. Methods: In this research, the Fe@C catalysts were successfully synthesized through direct pyrolysis of FeMIL-88B with MOFs structure at high temperature (600, 700 and 800 degrees C), then reduced and tested the FTS performance. Furthermore, pyrolysis temperature effects on textural properties and FTS performance were studied via TEM, SEM, XRD, N-2 physisorption, Raman spectroscopy Significant findings: The result indicated that the obtained catalysts depicted high Fe loading and transformation from needle-like precursor to highly porous sponge shaped crystalline. Moreover, the catalyst Fe@C-800 pyrolyzed at 800 degrees C achieved an exceptionally high C5+ hydrocarbon selectivity near 90% with good reaction stability. Meanwhile, the catalyst Fe@C-700 showed the highest CO conversion among these catalysts that can be credited to more Fe5C2 carbide phase which is a known active phase for FTS system. This demonstrates that the MOFs derived Fe-based catalysts are potential for high C5+ selectivity toward FTS without reduction of CO conversion. (C) 2021 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
      原文链接:
    • NSTL
    • Elsevier

    Electrosynthesis of electrochromic polymers based on bis-(4-(N-carbazolyl)phenyl)-phenylphosphine oxide and 3,4-propylenedioxythiophene derivatives and studies of their applications in high contrast dual type electrochromic devices

    Kuo, Chung-WenChang, Jui-ChengLee, Li-TingChang, Jeng-Kuei...
    18页
    查看更多>>摘要：Five phenylphosphine oxide-containing polymers (PBCPO (poly(bis-(4-(N-carbazolyl)phenyl)-phenylphosphine oxide)), P(BCPO-co-ProD-Me-2), P(BCPO-co-ProD-Et-2), P(BCPO-co-ProD-Bz(2)), and P(BCPO-co-ProD)) are electrodeposited on indium tin oxide (ITO) coated glass slide and their electrochromic performances are characterized. The optical band gap of PBCPO is 3.14 eV. P(BCPO-co-ProD-Bz(2)) attains a high transmittance change (Delta T = 55% at 740 nm) and shows multicolored electrochromism from light tan (0.0 V), grayish-green (0.4 V), greenish-gray (1.1 V) to deep gray (1.2 V). Electrochromic devices (ECDs) containing phenylphosphine oxide-based polycarbazoles and poly(3,4-ethylenedioxythiophene) (PEDOT) as active electrode layers are constructed. PBCPO/PEDOT ECD displays light gray, gray, and greenish-gray at 0.0, 0.8, and 1.9 V, respectively. P(BCPO-co-ProD-Bz(2))/PEDOT ECD displays a high optical contrast (Delta T = 42.5% at 630 nm) and P(BCPO-co-ProD)/PEDOT ECD shows a high coloration efficiency (eta = 454.1 cm(2).C-1 at 630 nm). In addition, P(BCPOco-ProD derivatives)/PEDOT ECDs have adequate optical memories and long-term redox cyclic stability. Background: Polycarbazoles can create considerably stable radical cations (polarons) and dications (bipolarons) when increasing potentials or doping chemicals. Moreover, carbazole and phenylphosphine oxide are donor (D) and acceptor (A) units in BCPO, respectively. The incorporation of phenylphosphine oxide in polycarbazoles gives rise to the improvement of charge balances and carrier mobilities. It is interesting to investigate the absorption spectra and multicolored electrochromisms of five phenylphosphine oxide-containing polycarbazoles and their corresponding ECDs upon undergoing a redox process. Methods: A series of phenylphosphine oxide-containing anodic polymers (PBCPO, P(BCPO-co-ProD-Me-2), P(BCPO-co-ProD-Et-2), P(BCPO-co-ProD-Bz(2)), and P(BCPO-co-ProD)) are electrodeposited on ITO coated glass. The absorption spectra, color variations, response time, and long-term electrochemical stability of PBCPO/PEDOT, P(BCPO-co-ProD-Me-2)/PEDOT, P(BCPO-co-ProD-Et-2)/PEDOT, P(BCPO-co-ProD-Bz(2))/PEDOT, and P(BCPO-co-ProD)/PEDOT ECDs are investigated comprehensively. Significant findings: The as-prepared phenylphosphine oxide-containing polycarbazoles exhibit multicolored electrochromism and high transmittance change (Delta T= 55% at 740 nm), which provide new structural insights to develop new generation electrochromic electrodes. (C) 2021 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
      原文链接:
    • NSTL
    • Elsevier