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Huang Q, Li G, Wang J, Niu B, Fang F, Quan D, Long D, Zhang Y. Adaptive Force Field Parameter Optimization for Expanding Reaction Simulations within Wide-Ranged Temperature. J Phys Chem A 2024. [PMID: 38502940 DOI: 10.1021/acs.jpca.3c07770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/21/2024]
Abstract
Large-scale and long-term simulation of chemical reactions are key research topics in computational chemistry. However, there are still difficulties in simulating high-temperature reactions, such as polymer thermal decomposition. Herein, we introduce an adaptive potential parameter optimization framework designed to automatically fine-tune parameters, and the application of it to optimize ReaxFF parameters enhances the accuracy of chemical reaction simulations conducted at experimental temperatures. To achieve this, we leverage the power of Random Forests and interpretable machine learning techniques that enable the identification and selection of parameters that exert a substantial influence on the target attribute. By training deep neural network (NN) models, we established optimized parameter associations with reference properties. We train deep neural network (NN) models to establish the relationship between the optimized parameters and reference properties. We employ a Genetic Algorithm (GA) to utilize the surrogate NN model and the quantum mechanical targets to speed up the search for the optimal parameters. Our simulation results of resin pyrolysis show that the adaptive optimized ReaxFF can predict the peak temperature more accurately and obtain reasonable product composition under conditions that more closely resemble experimental scenarios. This work facilitates advances in force field parameter optimization for more accurate and universal reaction simulations.
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Affiliation(s)
- Qingfu Huang
- Key Laboratory of Special Functional Polymeric Materials and Related Technology (Ministry of Education), School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Guixiang Li
- Key Laboratory of Special Functional Polymeric Materials and Related Technology (Ministry of Education), School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Junjie Wang
- Key Laboratory of Special Functional Polymeric Materials and Related Technology (Ministry of Education), School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | | | - Fang Fang
- Innovation & Research Institute of HIWING Technology Academy of CASIC, Beijing 100854, China
| | - Dongliang Quan
- Innovation & Research Institute of HIWING Technology Academy of CASIC, Beijing 100854, China
| | - Donghui Long
- Key Laboratory of Special Functional Polymeric Materials and Related Technology (Ministry of Education), School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Yayun Zhang
- Key Laboratory of Special Functional Polymeric Materials and Related Technology (Ministry of Education), School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
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Mei L, Chen X, Liu B, Zhang Z, Hu T, Liang J, Wei X, Wang L. Experimental Study on Bubble Dynamics and Mass Transfer Characteristics of Coaxial Bubbles in Petroleum-Based Liquids. ACS OMEGA 2023; 8:17159-17170. [PMID: 37214672 PMCID: PMC10193418 DOI: 10.1021/acsomega.3c01526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Accepted: 04/24/2023] [Indexed: 05/24/2023]
Abstract
Petroleum-based liquids are from an important petroleum-based polymer, whose application and preparation involve multiple operations related to gas-liquid two-phase flow. Due to insufficient research on gas-liquid two-phase flow, there is a gap in bubble dynamics and mass transfer characteristics in petroleum-based liquids. Accordingly, we have systematically investigated the bubble formation process, bubble rising dynamics, and mass transfer of coaxial bubbles. Herein, the contour of bubbles was obtained for analyzing the bubble formation process. It was found that the increase of gas flow rate contributed to the increase of bubble generation size, while the liquid viscosity had an inhibitory influence on the increase of bubble generation size. Moreover, the variation of bubble rising velocity was considered and the force analysis of the rising bubble was provided. A new model of drag coefficient applicable to petroleum-based liquids was proposed. Finally, variations in the amount of dissolved oxygen in the liquid were measured to analyze the mass transfer characteristics. The increase in nozzle inner diameter and gas flow rate both promoted mass transfer, but the increased liquid viscosity hindered mass transfer.
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Affiliation(s)
- Li Mei
- School
of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Petrochemical
Resource Processing and Process Intensification Technology, Guangxi University, Nanning 530004, PR China
| | - Xiaopeng Chen
- School
of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Petrochemical
Resource Processing and Process Intensification Technology, Guangxi University, Nanning 530004, PR China
| | - Bei Liu
- PetroChina
Guangxi Tiandong Petrochemical Co., Ltd., Tiandong 531599, China
| | - Zhongyao Zhang
- School
of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Petrochemical
Resource Processing and Process Intensification Technology, Guangxi University, Nanning 530004, PR China
| | - Tingting Hu
- School
of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Petrochemical
Resource Processing and Process Intensification Technology, Guangxi University, Nanning 530004, PR China
| | - Jiezhen Liang
- School
of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Petrochemical
Resource Processing and Process Intensification Technology, Guangxi University, Nanning 530004, PR China
| | - Xiaojie Wei
- School
of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Petrochemical
Resource Processing and Process Intensification Technology, Guangxi University, Nanning 530004, PR China
| | - Linlin Wang
- School
of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Petrochemical
Resource Processing and Process Intensification Technology, Guangxi University, Nanning 530004, PR China
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Feng L, Tian B, Zhang L, Yang M. Pyrolysis of hydrazine hydrate waste salt: Thermal behaviors and transformation characteristics of organics under aerobic/anaerobic conditions. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 323:116304. [PMID: 36261970 DOI: 10.1016/j.jenvman.2022.116304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Revised: 09/04/2022] [Accepted: 09/15/2022] [Indexed: 06/16/2023]
Abstract
The production of large quantities of industrial waste salts is becoming an issue of increasing concern with the adoption of the "zero liquid discharge" process for wastewater treatment. Recovery of waste salts as a useful resource after purification provides the best means of solving this problem. In this study, pyrolysis was studied as a purification technique to treat waste salt generated during hydrazine hydrate production (N2H4 WS) within the temperature range of 25-600 °C under aerobic and anaerobic conditions. Aerobic pyrolysis achieved 99.3% organic removal at a temperature that was 50 °C lower than was that achieved by anaerobic pyrolysis (600 °C). The formation of strong fluorescent species at 400 °C during anaerobic pyrolysis was detected using fluorescence excitation emission matrix (FEEM). These species were confirmed to be heterocyclic-N compounds, including pyridinic N and pyrrolic N, that were formed through cyclization reactions, as revealed by Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and thermogravimetric-Fourier transform infrared spectroscopy-mass spectrometry (TG-FTIR-MS). Harmful gases such as HCN and NH3 were released during anaerobic pyrolysis, and this may have been partially associated with the decomposition of heterocyclic-N compounds. Moreover, aerobic pyrolysis effectively reduced CO2 emissions by 8.7% based on energy consumption calculations. Therefore, aerobic pyrolysis is preferable for the purification of N2H4 WS owing to its low decomposition temperature, minimal release of harmful gaseous compounds, and low carbon emissions.
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Affiliation(s)
- Ling Feng
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, 100049, Beijing, China
| | - Binghui Tian
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, 100085, China; National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, 100049, Beijing, China.
| | - Lili Zhang
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, 100049, Beijing, China
| | - Min Yang
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, 100085, China; National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, 100049, Beijing, China.
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Windt X, Scott EL, Seeger T, Schneider O, Asadi Tashvigh A, Bitter JH. Fourier Transform Infrared Spectroscopy for Assessing Structural and Enzymatic Reactivity Changes Induced during Feather Hydrolysis. ACS OMEGA 2022; 7:39924-39930. [PMID: 36385893 PMCID: PMC9648064 DOI: 10.1021/acsomega.2c04216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Accepted: 09/28/2022] [Indexed: 06/16/2023]
Abstract
Chicken feathers are major byproducts of the livestock processing industry with high potential in the feed sector. In this study, we present a new approach using Fourier transform infrared (FTIR) spectroscopy to detect the structural changes of feather keratin and its availability for enzymatic hydrolysis (AEH) induced by the thermal pressure hydrolysis (TPH) process. Compared to time-consuming in vitro measurement techniques, the proposed method provides rapid information about the structural changes during TPH which enables quick adaptation of TPH conditions as the quality of the incoming feather changes. By analyzing the FTIR spectra of raw and processed feathers, it was found that AEH negatively relates to the β-sheet content (represented by two IR peaks centered at 1635 and 1689 cm-1), while it positively relates to a new series of peaks centered around 1700 cm-1 appearing after the TPH process. The proposed FTIR technique provides a reliable and rapid approach to determine the digestibility indicated by AEH of the processed feather and may be used in process control and optimization.
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Affiliation(s)
- Xinhua Windt
- Biobased
Chemistry and Technology, Wageningen University
& Research, Bornse Weilanden 9, 6708WGWageningen, Netherlands
- Saria
International GmbH, Norbert-Rethmann-Platz
1, 59379Selm, Germany
| | - Elinor L. Scott
- Biobased
Chemistry and Technology, Wageningen University
& Research, Bornse Weilanden 9, 6708WGWageningen, Netherlands
| | - Thorsten Seeger
- Saria
International GmbH, Norbert-Rethmann-Platz
1, 59379Selm, Germany
| | - Oliver Schneider
- Saria
International GmbH, Norbert-Rethmann-Platz
1, 59379Selm, Germany
| | - Akbar Asadi Tashvigh
- Biobased
Chemistry and Technology, Wageningen University
& Research, Bornse Weilanden 9, 6708WGWageningen, Netherlands
| | - Johannes H. Bitter
- Biobased
Chemistry and Technology, Wageningen University
& Research, Bornse Weilanden 9, 6708WGWageningen, Netherlands
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Dynamics of bubble formation and ascent motion on submerged orifices under different Mo number of petrol-based random copolymer solutions. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2022.04.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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