Recent Innovations in Chemical Engineering (Formerly Recent Patents on Chemical Engineering)最新文献

{"title":"Influence of SDS on the Growth of Natural Gas Hydrates in a Sand Bed Depending on Saturation and Mineralization of Pore\u0000Moisture","authors":"Aleksey M. Reshetnikov","doi":"10.2174/0124055204283697231224155414","DOIUrl":"https://doi.org/10.2174/0124055204283697231224155414","url":null,"abstract":"\u0000\u0000Evaluate the effect of SDS on induction time and conversion of water to hydrate in a porous medium model depending on the saturation and salinity of pore moisture.\u0000\u0000\u0000\u0000\u0000The work presents data on the formation of natural gas hydrates in sand bed fraction of 200-500 μm. The silica sand was saturated with water, solutions of SDS or NaCl, or a mixture of these. The saturation was 50% or 100%. The experiments were carried out under isochoric conditions at a temperature of 275 K and an initial pressure of 8 MPa.\u0000\u0000\u0000\u0000It was shown that the main hydrate formation occurred in the first 60 minutes. The addition of SDS 0.05-0.2 wt.% in the sand bed does not exhibit a promoting effect, as was previously shown for pure water. The addition of NaCl 3 wt.% reduces the conversion of water to hydrate by 1.6 and 2 times for 50% and 100% saturation of the sand bed.\u0000\u0000\u0000\u0000The optimal concentration of the SDS additive to the salt solution has been found to reduce the inhibitory effect of the salt. The data obtained can be used to develop technologies for storing and transporting natural gas using sand and seawater.\u0000","PeriodicalId":20833,"journal":{"name":"Recent Innovations in Chemical Engineering (Formerly Recent Patents on Chemical Engineering)","volume":"54 20","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139531826","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Valorization of Corn Steep Liquor for Improved Value-added\u0000Products: A Review","authors":"A. Taiwo, P. Musonge","doi":"10.2174/0124055204282376231219095404","DOIUrl":"https://doi.org/10.2174/0124055204282376231219095404","url":null,"abstract":"\u0000\u0000Corn steep liquor (CSL) is a by-product of wet steeping corn and is a source of vitamins, minerals, and amino acids. Depending on how food processing firms dispose of waste, CSL might have a negative impact on the environment. However, when CSL is used properly, it can promote economic growth and sustainability and prevent adverse environmental effects. However, the nutritional content of CSL and the high concentration of its organic matter suggest it is a rich source of feedstock. It can be used as a nutrient supplement or precursor to other products with even more value. CSL has been studied as a feedstock and additive for the sustainable production of chemicals and industrial products. A variety of bioproducts, including ethanol, acetoin, vanillin, and a variety of other biofuels, can be made from CSL due to its low cost and availability of components (nitrogen and carbon). The study seeks to highlight and present comprehensive novel uses of corn steep liquor in the circular economy to produce highervalued products with reduced carbon footprints.\u0000","PeriodicalId":20833,"journal":{"name":"Recent Innovations in Chemical Engineering (Formerly Recent Patents on Chemical Engineering)","volume":"23 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139534256","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Acoustical Analysis of Dextran+urea: Insights into Molecular Interactions","authors":"Subhraraj Panda","doi":"10.2174/0124055204271465231204112233","DOIUrl":"https://doi.org/10.2174/0124055204271465231204112233","url":null,"abstract":"The aim of this study is to determine the acoustic parameters of polymer dextran with urea. Recent years have seen an increase in the use of ultrasonic research to describe the physiochemical and thermodynamic characteristics of liquid solutions at various temperatures and frequencies. The size of the pure component and the mixtures had an impact on various interactions, molecular mobility, and kinds of interaction. Which were studied using the acoustical and thermodynamic characteristics? To ascertain how the solvent urea interacts with the solute dextran at the molecular level. Dextran (molecular weight of 70000) with 6(M)urea was used. The solution's density using a pycnometer, viscosity using an Ostwald viscometer, and ultrasonic velocity using an ultrasonic interferometer were examined. The physical properties of the medium are affected by the transmission of ultrasonic waves, which also teaches us about the physics of liquids and solutions. Understanding the interactions between the solutes and the solvent in the solution of dextran and urea, both the evaluated parameters were used, such as free volume, internal pressure, absorption coefficient, Rao's constant, and Wada's constant, as well as the observed values, such as ultrasonic velocity, density, and viscosity. Based on the modification of these parameters with varied temperature and frequency, molecular mobility, different types of intermolecular interaction, and the strength of the bond between the solute (dextran 0.5%) and solvent (6(M) urea) are investigated. The findings have been explained in terms of a structural reorganisation in the aqueous dextran solution. At all the temperatures used for the investigation, the solute-solvent interactions are more significant. The change in the acoustic properties is small because the frequency variation causes the molecules to move swiftly and have little chance to interact. Investigating molecular interactions, including electrostriction, acceptor-donor association, dipole-dipole association, and hydrogen bonding, has used these properties. Understanding molecular interactions helps one to comprehend the core issues surrounding the mechanisms of chemical and biological catalysis and the routes of chemical reactions.","PeriodicalId":20833,"journal":{"name":"Recent Innovations in Chemical Engineering (Formerly Recent Patents on Chemical Engineering)","volume":"6 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139176050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preparation and Catalytic Properties of Graphene Oxide/Phosphotungstic Acid Composites","authors":"Xiao Wang, Ping Zhang, Yousheng Tao","doi":"10.2174/0124055204263490231103114459","DOIUrl":"https://doi.org/10.2174/0124055204263490231103114459","url":null,"abstract":"This work make a step forward to the utilization of cellulose. Cellulose molecules are of stable crystalline structure. The hydrolysis of cellulose to small reducing sugars is difficult, but essential for its utilization. To investigate the effect of graphene oxide (GO) loading on the catalytic performance of phosphotungstic acid (HPW) for the catalyzed hydrolysis of cellulose, with the purpose to get high yield of total reducing sugar (TRS). We prepared graphene oxide/phosphotungstic acid (GO/HPW) composites, which were were applied to catalyze hydrolysis of microcrystalline cellulose in 1-butyl-3-methylimidazole chloride ionic liquid ([Bmim]Cl). The samples were characterized by XRD, FT-IR, SEM, pyridine IR and acid-base chemical titration. The Brønsted acidic sites were the main source of acidity in the composites and its concentration was 0.96 mmol/g. With the use of the GO/HPW composite as catalysts for cellulose hydrolysis, TRS yield of 90.5 % was obtained. GO/HPW composites retained the functional groups of both materials. It was the Brønsted acidic sites in the materials that effectively promoted the cellulose hydrolysis reaction. The structures of GO/HPW with the agglomeration of HPW scattered on GO were beneficial to the accessibility of acidic sites and mass transfer such as the reducing sugars generated by hydrolysis to the outside of the catalysts in time to prevent their further conversion into by-products. TRS yield of 90.5 % was obtained from the hydrolysis of cellulose catalyzed by the GO/HPW (1:1.5) composites at 115 ℃ for 4 h using catalysts to celulose 1:1 ratio. None.","PeriodicalId":20833,"journal":{"name":"Recent Innovations in Chemical Engineering (Formerly Recent Patents on Chemical Engineering)","volume":"15 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139257428","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Numerical Investigation and Machine Learning-Based Prediction of the Effect of Using Ring Turbulators on Heat Transfer Characteristics in a Counterflow Heat Exchanger","authors":"Özgür Solmaz, Eşref Baysal, M. Ökten","doi":"10.2174/0124055204273603231004071130","DOIUrl":"https://doi.org/10.2174/0124055204273603231004071130","url":null,"abstract":"Pipe-type heat exchangers are commonly used in industrial applications to facilitate heat transfer between two fluids at different temperatures without mixing them. In this study, turbulators were employed in a counterflow concentric pipe-type heat exchanger. Water at a flow rate of 50 l/h and a temperature of 298.14 K, and air at a temperature of 350 K were directed through the inner pipe. The different stages of circular turbulators placed inside the inner pipe were numerically investigated using the feasible κ-ε turbulence model. Heat transfer characteristics were examined for a turbulator-free heat exchanger and for turbulator-heat exchanger models with helical turbulators of 25, 50, 75, and 100 mm pitch at Reynolds numbers ranging from 4000 to 26000. The governing equations for three-dimensional and turbulent flow conditions in a steady state were solved using a computational fluid dynamics program based on the finite volume method. Temperature distributions and velocity contours in the heat exchanger were generated using the data obtained from numerical analysis. Additionally, predictions were made using artificial neural networks. The results revealed that the highest enhancement in heat transfer, amounting to 233.08% compared to the empty tube case, was achieved with the 25 mm pitch turbulator. The predictions made using artificial neural networks were in good agreement with the numerical analysis results. The designed turbulators for the heat exchanger model promoted turbulent flow, increased the heat transfer area, and led to an improvement in heat transfer.","PeriodicalId":20833,"journal":{"name":"Recent Innovations in Chemical Engineering (Formerly Recent Patents on Chemical Engineering)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139326147","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Annual Performance Evaluation of a Novel Industrial-Scale Solar Dryer for Phosphogypsum Waste","authors":"H. El-Ghetany, Sh. El Rafie, M.H. El-Awady, Randa M. Osman, Ahmed M. Awad Abouelata","doi":"10.2174/0124055204264579231003111214","DOIUrl":"https://doi.org/10.2174/0124055204264579231003111214","url":null,"abstract":"Solar drying is considered one of the most promising technologies for drying the phosphogypsum “Calcium Sulfate Dehydrate” material as a clean source of energy and saving the environment from its negative impact if it is dried in an open landfill. The dried phosphogypsum (PG) may be recycled and utilized in many useful applications. The presented design of the trapezoidal-shaped greenhouse solar dryer is the preferable solution to perform the drying process in the daytime with solar energy. It may be usable at night, during cloudy and rainy periods, using evacuated tube solar collectors via sensible heat solar thermal energy storage. The system can be operated for 24 hours by solar energy. From theoretical calculations, it was found that the drying time decreased as the gypsum layer in the drying trays decreased due to the improvement of the heat transfer mechanism. The designed solar dryer was studied at various loading capacities depending on the gypsum thickness on the dryer trays. Capacities were 8280 kg, 6624 kg, 4968 kg, 3312 kg, and 1656 kg, corresponding to gypsum thickness of 5 cm, 4 cm, 3 cm, 2 cm, and 1 cm, respectively. The daily collected amount of water and the daily moisture content were estimated with different gypsum thicknesses during all months of the year. It was found that the solar dryer with a capacity of 1,656 kg weight was technically and economically feasible. It was also found that the maximum reduction of moisture content occurred during the summer season, while the minimum values were achieved during winter. With a mass of gypsum equal to 1,656 kg weight, the moisture content of gypsum started to decrease from its initial value (35%) until it reached the final value (10%) in 4 scenarios: the first one, 2 days from April to September, 3 days from March to November, more than 3 days in other months while the minimum moisture content, i.e., 20%, was reported in the first day in June.","PeriodicalId":20833,"journal":{"name":"Recent Innovations in Chemical Engineering (Formerly Recent Patents on Chemical Engineering)","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139326576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bioleaching Extraction of Valuable Metal From E-Wastes: A Mini Review","authors":"Mingjun Jiang, Siyu He, Yongkui Zhang","doi":"10.2174/0124055204271800230926111857","DOIUrl":"https://doi.org/10.2174/0124055204271800230926111857","url":null,"abstract":"Electrical waste (E-waste) is a significant global issue, with an annual generation of over 50 million tons, causing detrimental effects on both the environment and human health. However, E-waste is also known as a secondary valuable metal resource. Although hydrometallurgy and pyrometallurgy are still the preferred methods for metal recovery from E-wastes, bioleaching has gained significant attention as a promising alternative for metal recovery from E-wastes due to its sustainability, environmental friendliness, and cost efficiency. In this review, different chemical principles of bioleaching were first discussed. Major bacterial groups that can be applied in bioleaching were then introduced. The bioleaching procedures and applications have been summarized and analyzed. Finally, a few perspectives were made on potential future research on bioleaching.","PeriodicalId":20833,"journal":{"name":"Recent Innovations in Chemical Engineering (Formerly Recent Patents on Chemical Engineering)","volume":"177 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139327810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Meet the Associate Editor","authors":"Sambhaji Shinde","doi":"10.2174/240552041605231218123439","DOIUrl":"https://doi.org/10.2174/240552041605231218123439","url":null,"abstract":"","PeriodicalId":20833,"journal":{"name":"Recent Innovations in Chemical Engineering (Formerly Recent Patents on Chemical Engineering)","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139326062","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preparation of Carbon Nanotubes-Supported CuMn2O4 Nanocomposites for Highly Efficient Degradation of Methylene Blue Dye","authors":"Xuyi Chen, Tianlu Chen, N. Fathy, Yousheng Tao","doi":"10.2174/0124055204262886231002031407","DOIUrl":"https://doi.org/10.2174/0124055204262886231002031407","url":null,"abstract":"Waste water containing dyes causes serious environmental problems in both aesthetic and toxicological aspects. Although physicochemical and biological treatment processes have been investigated, functional materials are highly demanded for improving the removal efficiency of dye from wastewater To synthesize a heterojunction nanocomposite of CuMn2O4/carbon nanotubes (CNTs) with outstanding catalytic performance for the effective degradation of methylene blue (MB) dye. Copper manganese oxide-carbon nanotubes (CuMn2O4/CNTs) nanocomposite was prepared by a solvothermal method. The structure and morphology of the samples were characterized with X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopic (TEM), and nitrogen adsorption/desorption on the samples at 77 K. The degradation of methylene blue dye was studied using the prepared nanocomposite as a catalyst. CuMn2O4 of small particles was loaded on CNTs, forming a porous structure with a specific surface area of 43.5 m2/g and a total pore volume of 0.17 cm3/g. The optimum conditions for achieving full breakdown in 10 minutes are 1g/L of catalyst dosage and a range of initial concentrations at 50-100 mg/L of MB dye at pH 4. The synthesized CuMn2O4/CNTs nanocomposite exhibited a good prospect as catalyst materials for the decontamination of wastewater polluted with dyes.","PeriodicalId":20833,"journal":{"name":"Recent Innovations in Chemical Engineering (Formerly Recent Patents on Chemical Engineering)","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139328970","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Recent Innovations and Patents of Lithium Extraction Techniques from Various Lithium Bearing Solutions","authors":"Sewar Aljarrah, A. Al-Rawajfeh, Muhammad Kashif Shahid, Qamar Ul Islam","doi":"10.2174/0124055204266229230927035347","DOIUrl":"https://doi.org/10.2174/0124055204266229230927035347","url":null,"abstract":"Lithium, with its exceptional properties, such as remarkable redox activity and high specific heat capacity, finds widespread applications in thermonuclear fusion reactors, ceramics, batteries, aerospace, glass, metal additives, and photo-electricity. The growing demand for clean technology, especially electric cars and energy storage, has led to a significant rise in global lithium production. Brines now constitute a major portion of the world's lithium output, driving research in lithium extraction and purification methods. This study examines recent innovative research and patents, including various extraction techniques, sorbents, electrolysis-based approaches, and cost-effective methods. The study identifies gaps and limitations in existing lithium extraction technology and proposes future research areas to advance the field. The bibliographic analysis underscores the importance of further investigation to overcome current obstacles and drive progress in lithium extraction.","PeriodicalId":20833,"journal":{"name":"Recent Innovations in Chemical Engineering (Formerly Recent Patents on Chemical Engineering)","volume":"16 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139352937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}