{"title":"Exciting Changes for the New Year","authors":"Michael Baldea, ","doi":"10.1021/acs.iecr.5c0022110.1021/acs.iecr.5c00221","DOIUrl":"https://doi.org/10.1021/acs.iecr.5c00221https://doi.org/10.1021/acs.iecr.5c00221","url":null,"abstract":"","PeriodicalId":39,"journal":{"name":"Industrial & Engineering Chemistry Research","volume":"64 6","pages":"3102 3102"},"PeriodicalIF":3.8,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143385997","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Robert F. DeJaco, Brandon Burghardt, Christine Parrish
{"title":"Modeling, Simulation, and Pilot Prediction of a Facilitated-Transport Membrane with Two-phase Permeate Flow for Olefin–Paraffin Separation","authors":"Robert F. DeJaco, Brandon Burghardt, Christine Parrish","doi":"10.1021/acs.iecr.4c03721","DOIUrl":"https://doi.org/10.1021/acs.iecr.4c03721","url":null,"abstract":"We present a mathematical model and numerical scheme tailored to our Optiperm Propane–Propylene spiral-wound membrane. To use simulation for accurate scale-up designs, we model a diverse array of physical phenomena. These include nonideal, temperature-dependent descriptions of flux and humidification induced by liquid water flow on the permeate side of the membrane. To enable monitoring of membrane performance with parameter optimization, we approximate the change in direction along the permeate side as a combination of cross and counter-current flow regions, as well as a finite difference technique implemented in the C programming language. As an application of the computational methodology, we perform a series of experiments and use numerical optimization to identify membrane transport parameters. We then perform simulations with these optimal properties to predict the purities and stage cuts of a membrane installed at Braskem. With absolute differences in stage cut and purity of 2.9 ± 2.8 and 1.4 ± 0.8%, respectively (and smaller in commercially relevant regimes), simulations enable accurate design and reduce risk in the transition from lab to commercialization.","PeriodicalId":39,"journal":{"name":"Industrial & Engineering Chemistry Research","volume":"1 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143385266","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Enhancing Mixing Efficiency of Shear-Thinning Liquids in Split-and-Recombine Microdevices","authors":"Amritendu Bhuson Ghosh, Arnab Atta","doi":"10.1021/acs.iecr.4c03256","DOIUrl":"https://doi.org/10.1021/acs.iecr.4c03256","url":null,"abstract":"Efficient mixing of shear-thinning fluids is crucial in many industries, with micromixers playing a key role in improving fluid handling. This study introduces innovative passive micromixer designs aimed at enhancing chaotic advection through secondary flows, especially in curved channels. We examined various split-and-recombine (SAR) microchannels, including a flow-focusing straight type, using numerical simulations across a range of Reynolds numbers with carboxymethyl cellulose solutions of different power-law indices. Performance metrics such as mixing index, pressure drop, and mixing energy cost were evaluated. While SAR configurations induced higher pressure drops, their relatively higher mixing index values resulted in lower mixing energy costs compared to the straight-type channel. Dean flow analysis showed that the splitting and recombining mechanism in SAR configurations generated stronger secondary flows, promoting greater stretching and folding of fluid elements. This significantly enhanced chaotic advection in curved geometries, leading to superior mixing efficiency over the straight-type configuration. These findings offer valuable insights into optimizing micromixer designs, balancing enhanced mixing with energy efficiency for shear-thinning fluids.","PeriodicalId":39,"journal":{"name":"Industrial & Engineering Chemistry Research","volume":"50 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143385267","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Design of the Transition for Sustainable Plastic Waste Management under Carbon Policies in the United States","authors":"Oluwadare Badejo, Borja Hernández, Marianthi Ierapetritou","doi":"10.1021/acs.iecr.4c03942","DOIUrl":"https://doi.org/10.1021/acs.iecr.4c03942","url":null,"abstract":"The growing environmental and economic challenges posed by plastic waste demand innovative and strategic solutions. This study presents a decision-making framework using mathematical programming to determine the technologies, their location, and the transportation method (electric or with conventional trucks) under different scenarios: maximizing profit, maximizing decarbonization, maximizing plastic circularity, and maximizing profit under carbon tax and carbon cap policies. Results suggest upcycling by pyrolysis for maximizing profit; hydrocracking and mechanical recycling for maximizing the decarbonization; hydrocracking, pyrolysis, and mechanical recycling for carbon tax and carbon cap schemes; and mechanical recycling combined with chemical recycling for maximizing circularity. These results highlight the challenges of simultaneously maximizing circularity and meeting the 2050 decarbonization targets proposed by the Paris agreement as chemical recycling involves pyrolysis, a highly energy intensive technology. The assessment of the policies shows that current carbon taxes are not sufficient for achieving those decarbonization targets. To address this, either higher taxes or a carbon cap policy mechanism are needed with four recommended technologies: upcycling based on pyrolysis and hydrocracking, chemical recycling, and mechanical recycling.","PeriodicalId":39,"journal":{"name":"Industrial & Engineering Chemistry Research","volume":"32 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143385268","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yi-Fan Yao, Yi-Hai Zhao, Mei-Juan Xie, Ying Yang, Xi Wang, Fan Xu, Yun-Xiang Xu
{"title":"New Insights into the Strengthening Mechanism of Nanofillers in Terminally Functionalized Polyisoprene Rubbers","authors":"Yi-Fan Yao, Yi-Hai Zhao, Mei-Juan Xie, Ying Yang, Xi Wang, Fan Xu, Yun-Xiang Xu","doi":"10.1021/acs.iecr.4c02989","DOIUrl":"https://doi.org/10.1021/acs.iecr.4c02989","url":null,"abstract":"To overcome the problems of reduced elasticity and increased energy consumption resulting from large amounts of nanofillers, the reinforcement mechanism of low loading nanofillers is quite attractive but still obscure, especially considering the interactions with special polymer structures. Herein, two special nanofillers with low loading levels were used to interact noncovalently with polar end groups to form distinct aggregates. Nonpolar olefin-rich groups were introduced into the other end of the rubber chain to provide an anchoring effect and restrain the network. The analysis of the viscoelastic behavior and the evolution process of the secondary structure showed a difference between the two polar aggregates. The sample containing the nanofiller pentaalanine (5A) showed viscoelastic behavior similar to that of nonfilled rubber, with very low hysteresis loss, excellent resilience, and improved dimensional stability because of its relatively stable aggregate structures. The samples containing the HMWCNT nanofiller significantly improved the mechanical properties and strain-induced crystallization behavior due to their strong orientation ability. Besides, the 5A composite showed certain recyclability and presented excellent mechanical strengths of recycled samples compared to the reported ones, which are much superior to the HMWCNT composites.","PeriodicalId":39,"journal":{"name":"Industrial & Engineering Chemistry Research","volume":"10 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143375712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ying Han, Hao Jiang, Xiulian Chen, Jun Liu, Ruiqian Zhang, Shiping Song, Yijun Li
{"title":"Identifying Syndiotactic Polypropylene as a Promising Candidate for Polymer Laser Powder Bed Fusion and Neutron Shielding Materials","authors":"Ying Han, Hao Jiang, Xiulian Chen, Jun Liu, Ruiqian Zhang, Shiping Song, Yijun Li","doi":"10.1021/acs.iecr.4c03755","DOIUrl":"https://doi.org/10.1021/acs.iecr.4c03755","url":null,"abstract":"With the development of nuclear energy technology for microreactor power sources, shielding components with complex geometries is becoming increasingly important. However, conventional manufacturing methods, such as compression and injection molding, are limited to producing two-dimensional plate-shaped products. In this study, syndiotactic polypropylene (sPP) was demonstrated to be an ideal material for powder bed fusion of polymers using a laser beam (PBF-LB/P), due to its low crystallinity and wide sintering window (SW). Under a laser power of 40 W and a scan spacing of 0.3 mm, the sintered sPP specimens exhibited a tensile strength of 16.54 MPa, an elongation at break of 15.4%, a warping degree of only 1.42°, and a dimensional deviation of less than 0.4 mm. Compared to other polymers processed by PBF-LB/P, sPP’s high hydrogen content shows promising potential for neutron-shielding structural parts. Therefore, this study not only advances the processing of sPP in PBF-LB/P technology but also provides new insights into the development of complex, lightweight shielding components.","PeriodicalId":39,"journal":{"name":"Industrial & Engineering Chemistry Research","volume":"41 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143375715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Promising Thermal Insulation Silicone Rubber Composite Foams with High Expansion Ratios via Fluorosilicone Rubber Blending and Cell Structure Design","authors":"Wanyu Tang, Bo Wang, Ruyun Xu, Xiaohan Wang, Guangxian Li, Xia Liao","doi":"10.1021/acs.iecr.4c03793","DOIUrl":"https://doi.org/10.1021/acs.iecr.4c03793","url":null,"abstract":"The production of high-expansion-ratio silicone rubber foam has posed a longstanding challenge, particularly due to insufficient porosity, limiting its application as a thermal insulation material in battery packs for new energy electric vehicles, crucial for ensuring battery longevity at low temperatures. Herein, poly(methylvinylsiloxane) (PMVS) was selected as the matrix, and fluorosilicone rubber (FVMQ) with high viscosity and heterogeneous nucleation effects was introduced as a secondary phase to increase the expansion ratio of silicone rubber. By analysis of the vulcanization characteristics and foaming behavior of PMVS/FVMQ composites, the influence mechanism of FVMQ on the cell structure was investigated. PMVS/FVMQ composite foams with superior expansion ratios compared to both PMVS and FVMQ foams were successfully fabricated. Leveraging FVMQ’s low inherent thermal conductivity and its ability to promote the expansion ratio, the thermal conductivity of PMVS/FVMQ (8:2) composite foams was reduced by 32.8% compared to PMVS foams under identical preparation conditions. Furthermore, two saturation processes, namely, the “temperature-raise process” and “high-temperature & high-pressure process”, were devised to simultaneously promote cell nucleation and cell growth, leading to significantly reduced cell sizes while maintaining high expansion ratios. The more refined cell structure further improves the thermal insulation performance, achieving a thermal conductivity as low as 0.033 W/m·K, approaching that of air.","PeriodicalId":39,"journal":{"name":"Industrial & Engineering Chemistry Research","volume":"55 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143375716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kwabena Koranteng Asiedu, Luke E. K. Achenie, Tracy Asamoah, Emmanuel Kwesi Arthur, Nana Yaw Asiedu
{"title":"Incorporating Mechanistic Insights into Structure–Property Modeling of Metal–Organic Frameworks for H2 and CH4 Adsorption: A CGCNN Approach","authors":"Kwabena Koranteng Asiedu, Luke E. K. Achenie, Tracy Asamoah, Emmanuel Kwesi Arthur, Nana Yaw Asiedu","doi":"10.1021/acs.iecr.4c03301","DOIUrl":"https://doi.org/10.1021/acs.iecr.4c03301","url":null,"abstract":"In this paper, we introduce a novel approach for understanding gas adsorption mechanisms in Metal–Organic Frameworks (MOFs) by combining a tailored Crystal Graph Convolutional Neural Network (AG-CGCNN) with game theory through Shapley Additive Explanations (SHAP). Our technique identifies the root causes of suboptimal performance in crystal structures through the analysis of softmax probabilities of performance outcomes, alongside the marginal contributions of crystalline and geometric features to these outcomes. Specifically, our approach discerns whether poor performance stems from inefficient atom–atom interactions indicating suboptimal gas molecule capture or from the subpar distribution of geometric characteristics, including surface area, pore limiting diameter (PLD), or largest cavity diameter (LCD). Additionally, the modeling framework adopted in this study clearly captures how intrinsic atomic features facilitate excess adsorption while volumetric spatial characteristics account for bulk absorption in complex porous MOF networks. Furthermore, we have introduced an innovative technique to quantitatively evaluate the amount of both excess gas absorbed within site interactions and bulk gas within the void spaces in a single MOF unit cell using a modified CGCNN regression model and SHAP. Additionally, we highlight the excellent performance of three 100 K-trained AG-CGCNN and demonstrate how its architecture can be used to determine the efficiency of a MOF gas capture system.","PeriodicalId":39,"journal":{"name":"Industrial & Engineering Chemistry Research","volume":"47 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143375713","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Atif Ansari, Tapas Ranjan Mohanty, Subramanian Ramakrishnan, S. K. P. Amarnath, Nikhil K. Singha
{"title":"Design of Silyl Functionalized Emulsion SBR and its Application in Green Tire","authors":"Atif Ansari, Tapas Ranjan Mohanty, Subramanian Ramakrishnan, S. K. P. Amarnath, Nikhil K. Singha","doi":"10.1021/acs.iecr.4c04125","DOIUrl":"https://doi.org/10.1021/acs.iecr.4c04125","url":null,"abstract":"In this investigation, the nonpolar emulsion-based styrene-butadiene rubber (ESBR) was modified by grafting 3-(triethoxysilyl)propyl methacrylate (TESPMA) using the AIBN initiator at 80 °C temperature. The silyl-modified ESBR (Si-ESBR) was analyzed by using <sup>1</sup>H NMR, FT-IR, XPS, and thermal analyses. The synthesized Si-ESBR has been formulated with ESBR and a blend of ESBR/natural rubber (NR) along with silica and silica/CB fillers regarding “green tire” tread application (ESBR-silica and ESBR/NR-silica/CB). The implementation of Si-ESBR enhanced the silica and silica/CB fillers dispersion in the ESBR and ESBR/NR matrix. Consequently, the physical characteristics, including modulus, tensile strength, and reinforcing index of composites, are increased. The DMA analysis revealed that the composite ESBR/Si-ESBR2-silica had a 12.2% lower rolling resistance indicator; in contrast, dry, wet, and ice tractions were increased by 20.6%, 37%, and 14.5%, respectively, compared to the pure ESBR-silica composite. Also, composite ESBR/NR/Si-ESBR2-silica/CB had a 12.6% lower rolling resistance indicator, and traction properties (dry, wet, and ice traction) were enhanced by 20.5%, 61%, and 67%, respectively, in contrast to the ESBR/NR-silica/CB composite. Therefore, incorporating the Si-ESBR mechanism might provide a potential pathway for improving dispersion of fillers (silica and silica/CB) in the nonpolar elastomer matrix.","PeriodicalId":39,"journal":{"name":"Industrial & Engineering Chemistry Research","volume":"63 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143385270","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"MOF UiO-66 Membranes for Pervaporation Prepared by Secondary Growth Using Zr(n-OPr)4","authors":"Shenyi Tang, Chenglian Luo, Zhi Wang, Xinlei Liu","doi":"10.1021/acs.iecr.4c04644","DOIUrl":"https://doi.org/10.1021/acs.iecr.4c04644","url":null,"abstract":"A defect-free and stable metal–organic framework (MOF) membrane is a promising candidate for the separation of methanol/methyl tertiary butyl ether (MeOH/MTBE) mixtures. In this work, a structural-integrity and low-thickness (∼400 nm) UiO-66 membrane was fabricated by regulating the metal ion/ligand molar ratio in the synthesis solution and optimizing the preparation process using the secondary growth method with safer and more environment-friendly Zr(<i>n</i>-OPr)<sub>4</sub> metal source. Based on the effective pore size and inherent amphiphilic structure of UiO-66, the membrane exhibits exceptional pervaporation (PV) performance. For the separation of MeOH/MTBE (5:95 wt/wt %) mixtures, the membrane displays an outstanding separation performance with an average separation factor of 2.23 × 10<sup>4</sup> and an average total flux of 3.61 kg·m<sup>–2</sup>·h<sup>–1</sup> at 40 °C, which is superior to most membranes reported for the PV separation of MeOH/MTBE mixtures. In addition, a 72 h PV process was used to further confirm the structural stability of the membrane.","PeriodicalId":39,"journal":{"name":"Industrial & Engineering Chemistry Research","volume":"31 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143367388","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}