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1. Nucleation mechanisms of iodic acid in clean and polluted coastal regions

Author:
Rong, Hui; Liu, Jiarong; Zhang, Yujia; Du, Lin; Zhang, Xiuhui; Li, Zesheng
Source:
Chemosphere 2020 v.253 pp. 126743
ISSN:
0045-6535
Subject:
sulfuric acid,   etc   ; ammonia; coasts; hydrogen bonding; iodine; quantum mechanics; winter;     Show all 7 Subjects
Abstract:
... In coastal regions, intense bursts of particles are frequently observed with high concentrations of iodine species, especially iodic acid (IA). However, the nucleation mechanisms of IA, especially in polluted environments with high concentrations of sulfuric acid (SA) and ammonia (A), remain to be fully established. By quantum chemical calculations and atmospheric cluster dynamics code (ACDC) simu ...
DOI:
10.1016/j.chemosphere.2020.126743

2. One-pot synthesis of (E)-3-benzylideneflavanones from 2-hydroxyacetophenones and aromatic aldehydes

Author:
Yang, Lishou; Wang, Enhua; Fan, Yanhua; Yang, Juan; Luo, Zhongsheng; Wang, Yu; Peng, Mei; Deng, Tingfei; Yang, Xiaosheng
Source:
Tetrahedron letters 2020 v.61 no.15 pp. 151180
ISSN:
0040-4039
Subject:
sulfuric acid,   etc   ; aldehydes; chemical reactions; chemical structure; synthesis;     Show all 5 Subjects
Abstract:
... An efficient and practical PPA/H₂SO₄ promoted synthesis of (E)-3-benzylideneflavanones from 2-hydroxyacetophenones and aromatic aldehydes was developed. Various (E)-3-benzylideneflavanones were produced in good to excellent yields. ...
DOI:
10.1016/j.tetlet.2019.151180

3. Theoretical study of the hydration effects on alkylamine and alkanolamine clusters and the atmospheric implication

Author:
Ge, Pu; Luo, Gen; Huang, Wei; Xie, Hongbin; Chen, Jingwen; Luo, Yi
Source:
Chemosphere 2020 v.243 pp. 125323
ISSN:
0045-6535
Subject:
sulfuric acid,   etc   ; dimethylamine; ethanolamine; humidity; models; thermodynamics; trimethylamine;     Show all 7 Subjects
Abstract:
... Amines are important atmospheric nucleation precursors in polluted areas. However, specific roles of various amines in enhancing the stability of pre-nucleation clusters are poorly understood. Herein, different roles of trimethylamine (TMA) and monoethanolamine (MEA) in the formation of sulfuric acid (SA)-based pre-nucleation clusters were investigated. The hydration effects of up to four water (W ...
DOI:
10.1016/j.chemosphere.2019.125323

4. A Simple Model for the Hygroscopy of Sulfuric Acid

Author:
Kiradjiev, Kristian B.; Nikolakis, Vladimiros; Griffiths, Ian M.; Beuscher, Uwe; Venkateshwaran, Vasudevan; Breward, Christopher J. W.
Source:
Industrial & engineering chemistry process design and development 2020 v.59 no.10 pp. 4802-4808
ISSN:
1520-5045
Subject:
sulfuric acid,   etc   ; absorption; mathematical models; prediction; relative humidity;     Show all 5 Subjects
Abstract:
... Sulfuric acid is a highly hygroscopic substance, increasing its volume by absorbing water from a high relative-humidity environment. In this paper, we present a mathematical model that describes the hygroscopy of a uniform layer of sulfuric acid with a given initial concentration and relative humidity of the surrounding gaseous environment. We assume that water is absorbed across the gas–liquid in ...
DOI:
10.1021/acs.iecr.9b06018

5. Evidence for cross-polymerization between the biomass-derived furans and phenolics

Author:
Sun, Kai; Zhang, Lijun; Xu, Qing; Zhang, Zhanming; Shao, Yuewen; Dong, Dehua; Gao, Guanggang; Liu, Qing; Wang, Shuang; Hu, Xun
Source:
Renewable energy 2020 v.154 pp. 517-531
ISSN:
0960-1481
Subject:
sulfuric acid,   etc   ; biofuels; carbon; furfural; furfuryl alcohol; guaiacol; polymerization; polymers; sugars; thermal stability; vanillin;     Show all 11 Subjects
Abstract:
... The high tendency of bio-oil towards polymerization is one of the key challenges in hydrotreatment of bio-oil for production of bio-fuels. However, such properties of bio-oil could be used to produce carbon materials, but the mechanism for the polymerization has not been clarified. Bio-oil contains sugars, derivatives of sugars (i.e. furans et al.), phenolic monomers and oligomers. Among of them, ...
DOI:
10.1016/j.renene.2020.03.030

6. Responses of gaseous sulfuric acid and particulate sulfate to reduced SO2 concentration: A perspective from long-term measurements in Beijing

Author:
Li, Xiaoxiao; Zhao, Bin; Zhou, Wei; Shi, Hongrong; Yin, Rujing; Cai, Runlong; Yang, Dongsen; Dällenbach, Kaspar; Deng, Chenjuan; Fu, Yueyun; Qiao, Xiaohui; Wang, Lin; Liu, Yongchun; Yan, Chao; Kulmala, Markku; Zheng, Jun; Hao, Jiming; Wang, Shuxiao; Jiang, Jingkun
Source:
The Science of the total environment 2020 v.721 pp. 137700
ISSN:
0048-9697
Subject:
sulfuric acid,   etc   ; air quality; cities; issues and policy; models; oxidation; sulfates; sulfur; sulfur dioxide; China;     Show all 10 Subjects
Abstract:
... SO₂ concentration decreased rapidly in recent years in China due to the implementation of strict control policies by the government. Particulate sulfate (pSO42−) and gaseous H₂SO₄ (SA) are two major products of SO₂ and they play important roles in the haze formation and new particle formation (NPF), respectively. We examined the change in pSO42− and SA concentrations in response to reduced SO₂ con ...
DOI:
10.1016/j.scitotenv.2020.137700

7. Optimization of a liquid-phase plasma discharge process for biodiesel synthesis from pure oleic acid

Author:
Wu, Sarah; Bashir, Muhammad Aamir; Zhu, Jun
Source:
Fuel processing technology 2020 v.202 pp. 106368
ISSN:
0378-3820
Subject:
sulfuric acid,   etc   ; biodiesel; liquids; methanol; models; oleic acid; regression analysis; response surface methodology; uncertainty analysis;     Show all 9 Subjects
Abstract:
... A novel liquid phase plasma discharge (LPPD) process was developed and optimized for converting pure oleic acid to biodiesel. Independent variables including weight ratio of H₂SO₄ to oleic acid (CAT, %) at 0, 1, 2, 3, and 4% and the methanol to oleic acid molar ratio (MOMR) at 4, 6, 8, 10, and 12 were chosen and examined. Central Composite Design (CCD) coupled with Response Surface Methodology (RS ...
DOI:
10.1016/j.fuproc.2020.106368

8. Electrospun cyclodextrin nanofibers as precursor for carbon nanofibers

Author:
Patil, Bhushan; Yildiz, Zehra Irem; Uyar, Tamer
Source:
Journal of materials science 2020 v.55 no.13 pp. 5655-5666
ISSN:
0022-2461
Subject:
sulfuric acid,   etc   ; X-ray diffraction; carbon; carbon nanofibers; carbonization; chemical treatment; cyclodextrins; oxygen; pyrolysis;     Show all 9 Subjects
Abstract:
... The carbon nanofibers (CNF) based on the electrospun polymer-free hydroxypropyl-β-cyclodextrin (HPβCD) nanofibers were obtained by the combination of chemical and thermal (pyrolysis) treatment. The thermal and chemical decomposition of HPβCD makes it challenging to obtain persistent CNF from HPβCD nanofibers. The chemical treatment of HPβCD nanofibers by using 0.6 mM H₂SO₄ partially dissolves nano ...
DOI:
10.1007/s10853-020-04374-3

9. A molecular-scale study on the role of methanesulfinic acid in marine new particle formation

Author:
Ning, An; Zhang, Haijie; Zhang, Xiuhui; Li, Zesheng; Zhang, Yunhong; Xu, Yisheng; Ge, Maofa
Source:
Atmospheric environment 2020 v.227 pp. 117378
ISSN:
1352-2310
Subject:
sulfuric acid,   etc   ; aerosols; atmospheric chemistry; catalytic activity; density functional theory; dimethylamine; phase transition; sulfur; temperature; thermodynamics;     Show all 10 Subjects
Abstract:
... Sulfur species have profound impacts on the formation of secondary organic aerosols in marine regions. As one of the most important organic-sulfur components over the ocean, methanesulfinic acid (MSIA) has received attention. However, its potential role in new particle formation (NPF) is still not fully raveled at the molecular level. Using density functional theory (DFT) combined with the Atmosph ...
DOI:
10.1016/j.atmosenv.2020.117378

10. Facile synthesis of Nafion-supported Pt nanoparticles with ultra-low loading as a high-performance electrocatalyst for hydrogen evolution reaction

Author:
Yu, Jianguo; Wei, Dan; Zheng, Zhe; Yu, Wenjie; Shen, Honghui; Qu, Yuning; Wen, Shuya; Kwon, Young-Uk; Zhao, Yongnan
Source:
Journal of colloid and interface science 2020 v.566 pp. 505-512
ISSN:
0021-9797
Subject:
sulfuric acid,   etc   ; catalysts; catalytic activity; dispersants; durability; electrochemistry; hydrogen production; nanoparticles; platinum; synergism;     Show all 10 Subjects
Abstract:
... x%Pt-Naf-CV (Pt-Nafion-Cyclic Voltammetry) catalysts with homogeneously distributed platinum nanoparticles and ultra-low Pt loading are successfully synthesized by using a facile potential cycling approach. The as-synthesized 0.8%Pt-Naf-CV catalyst exhibits an enhanced electrocatalytic activity for hydrogen evolution reaction (HER) in 0.5 M H₂SO₄ solution, which obtains a low overpotential of 34 m ...
DOI:
10.1016/j.jcis.2019.10.112

11. Atmospheric implications of hydration on the formation of methanesulfonic acid and methylamine clusters: A theoretical study

Author:
Chen, Dongping; Li, Danfeng; Wang, Changwei; Luo, Yi; Liu, Fengyi; Wang, Wenliang
Source:
Chemosphere 2020 v.244 pp. 125538
ISSN:
0045-6535
Subject:
sulfuric acid,   etc   ; chemistry; density functional theory; methylamine; relative humidity; sulfonic acids; temperature; thermodynamics;     Show all 8 Subjects
Abstract:
... The effect of hydration on the formation mechanism of clusters consisting of methanesulfonic acid (MSA) and methylamine (MA) is investigated by quantum chemistry (Density Functional Theory, DFT) and kinetics simulation (Atmospheric Chemical Dynamic Code, ACDC) methods. The results showed that the process of hydration is favorable from the thermodynamic point of view, and the presence of water mole ...
DOI:
10.1016/j.chemosphere.2019.125538

12. Cellulose II nanocrystal: a promising bio-template for porous or hollow nano SiO2 fabrication

Author:
Kuang, Yishan; Li, Xia; Luan, Pengcheng; Zhang, Xi; Xu, Jun; Mo, Lihuan; Gong, Jie; Li, Jun
Source:
Cellulose 2020 v.27 no.6 pp. 3167-3179
ISSN:
0969-0239
Subject:
sulfuric acid,   etc   ; acid hydrolysis; cellulose; mercerization; nanocrystals; porosity; porous media; silica;     Show all 8 Subjects
Abstract:
... Cellulose nanocrystal (CNC) particles have been widely used as template for porous materials synthesis. The pore size of porous materials is closely related to the dimension of CNC templates. In the present study, the initial crystal size of raw cellulose material was changed by a simple mercerization treatment, and elliptical- or granule-like CNC with allomorph of cellulose II (CNC-II) was obtain ...
DOI:
10.1007/s10570-020-02973-6

13. Heat recovery from sulfuric acid plants for seawater desalination using RO and MED systems

Author:
Saifaoui, D.; Nachtane, M.; Tarfaoui, M.; Rouway, M.; Aroussy, Y.
Source:
Applied water science 2020 v.10 no.4 pp. 99
ISSN:
2190-5487
Subject:
sulfuric acid,   etc   ; desalination; energy requirements; heat production; heat recovery; power plants; reverse osmosis; seawater; thermal energy;     Show all 9 Subjects
Abstract:
... Conforming to the factor characteristics of electricity–water cogeneration power plants, an improved multieffect desalination (MED) and reverse osmosis (RO) are the most current techniques for seawater desalination. A principal change between these operations consists of their various energy requirements, thermal energy for MED and mechanical energy for RO plants. The main improvement ideas of RO ...
DOI:
10.1007/s13201-020-01182-7

14. Influence of atmospheric conditions on sulfuric acid-dimethylamine-ammonia-based new particle formation

Author:
Li, Hao; Ning, An; Zhong, Jie; Zhang, Haijie; Liu, Ling; Zhang, Yunling; Zhang, Xiuhui; Zeng, Xiao Cheng; He, Hong
Source:
Chemosphere 2020 v.245 pp. 125554
ISSN:
0045-6535
Subject:
sulfuric acid,   etc   ; agricultural land; altitude; amines; ammonia; quantitative analysis; rural areas; temperature; winter; China;     Show all 10 Subjects
Abstract:
... A recent quantitative measurement of rates of new particle formation (NPF) in urban Shanghai showed that the high rates of NPF can be largely attributed to the sulfuric acid (SA)-dimethylamine (DMA) nucleation due to relatively high DMA concentration in urban atmosphere (Yao et al., Science. 2018, 361, 278). In certain atmospheric conditions, the release of DMA is accompanied with the emission of ...
DOI:
10.1016/j.chemosphere.2019.125554

15. Visual chemo-chronometric assay for quantifying ethanol in alcoholic drinks by the colorimetric Belousov-Zhabotinsky oscillator

Author:
Sansuk, Sira; Juntarakod, Paramust; Tongphoothorn, Wimonrat; Sirimungkala, Atchara; Somboon, Titikan
Source:
Food control 2020 v.110 pp. 107042
ISSN:
0956-7135
Subject:
sulfuric acid,   etc   ; alcoholic beverages; calibration; colorimetry; ethanol; image analysis; malonic acid; mobile telephones;     Show all 8 Subjects
Abstract:
... A simple chemo-chronometric method utilizing the Belousov-Zhabotinsky (BZ) oscillating reaction for the efficient detection of ethanol in alcoholic beverages has been developed. This visual detecting strategy only required a smartphone, without implemented instrumental detection systems, to video a unique colorimetric alternating (red-to-blue) feature of the BZ solution system containing 0.50 M br ...
DOI:
10.1016/j.foodcont.2019.107042

16. Facile synthesis of diarylsulfones from arenes and 3CdSO4·xH2O via mechanochemistry

Author:
Qin, Shuai; Zhang, Pu; Qin, Yu-Jun; Guo, Zhi-Xin
Source:
Tetrahedron letters 2020 v.61 no.10 pp. 151567
ISSN:
0040-4039
Subject:
sulfuric acid,   etc   ; Lewis acids; aromatic hydrocarbons; chemical reactions; chemical structure; mechanochemistry; milling; phosphorus pentoxide;     Show all 8 Subjects
Abstract:
... A variety of substituted diarylsulfones could be synthesized by simple arenes and 3CdSO₄·xH₂O in the presence of P₂O₅ under high-speed ball milling. It was suggest the aromatic sulfonation was performed by arene and in situ generated H₂SO₄, following-up by electrophilic substitution with another arene to give diarylsulfone. ...
DOI:
10.1016/j.tetlet.2019.151567

17. Redox electroactive group-modified carbon cloth as flexible electrode for high performance solid-state supercapacitors

Author:
Liu, Juanli; Wang, Qi; Liu, Peng
Source:
Colloids and surfaces 2020 v.588 pp. 124388
ISSN:
0927-7757
Subject:
sulfuric acid,   etc   ; additives; capacitance; carbon; carbon electrodes; electrochemical capacitors; electrochemistry; electrolytes; hydrazine; oxidation; quinones;     Show all 11 Subjects
Abstract:
... Redox electroactive species have been widely used as redox additives in electrolytes or modifiers for carbon-based electrodes to increase the charge storage capacity of supercapacitors. Here, redox electroactive group-modified carbon cloth (ROCC-DAA) was designed to improve its electrochemical property as flexible electrode for supercapacitors, by facile covalent modification of the oxidized carbo ...
DOI:
10.1016/j.colsurfa.2019.124388

18. Lightweight, flexible MXene/polymer film with simultaneously excellent mechanical property and high-performance electromagnetic interference shielding

Author:
Wan, Yan-Jun; Li, Xing-Miao; Zhu, Peng-Li; Sun, Rong; Wong, Ching-Ping; Liao, Wei-Hsin
Source:
Composites 2020 v.130 pp. 105764
ISSN:
1359-835X
Subject:
sulfuric acid,   etc   ; composite films; composite materials; electromagnetic interference; polymers; sulfonates; tensile strength;     Show all 7 Subjects
Abstract:
... How to obtain high strength while remain the good shielding performance of MXene film is a big challenge, which limits its further application. Herein, we report on fabrication of mechanically strong and high-performance EMI shielding Ti₃C₂Tx composite film by incorporating of poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) (PEDOT/PSS) and then treatment with concentrated sulfuric acid to ...
DOI:
10.1016/j.compositesa.2020.105764

19. Role of glycine on sulfuric acid-ammonia clusters formation: Transporter or participator

Author:
Li, Danfeng; Chen, Dongping; Liu, Fengyi; Wang, Wenliang
Source:
Journal of environmental sciences (China) 2020 v.89 pp. 125-135
ISSN:
1001-0742
Subject:
sulfuric acid,   etc   ; ammonia; density functional theory; evaporation; glycine (amino acid); hydrogen bonding; temperature;     Show all 7 Subjects
Abstract:
... Glycine (Gly) is ubiquitous in the atmosphere and plays a vital role in new particle formation (NPF). However, the potential mechanism of its on sulfuric acid (SA) - ammonia (A) clusters formation under various atmospheric conditions is still ambiguous. Herein, a (Gly)ₓ·(SA)y·(A)z (z ≤ x + y ≤ 3) multicomponent system was investigated by using density functional theory (DFT) combined with Atmosphe ...
DOI:
10.1016/j.jes.2019.10.009

20. Vapor–liquid and chemical equilibria model for formaldehyde–trioxane–sulfuric acid–water mixtures

Author:
Jiang, Siqi; Zhang, Xianming; Hu, Yufeng; Yin, Liuyi; Qi, Jianguang; Ren, Chunxiao; Mo, Shuqin
Source:
Journal of chemical technology and biotechnology 2020 v.95 no.3 pp. 719-729
ISSN:
0268-2575
Subject:
sulfuric acid,   etc   ; byproducts; catalysts; catalytic activity; distillation; energy; formaldehyde; formic acid; models; prediction; separation;     Show all 11 Subjects
Abstract:
... BACKGROUND: Trioxane (C₃H₆O₃) is industrially produced from aqueous formaldehyde (HCHO) solutions through catalytic distillation catalyzed by sulfuric acid (H₂SO₄). Optimizing industrial process of the synthesis and developing new catalysts require a reliable model for the vapor–liquid equilibria in reaction mixture HCHO–C₃H₆O₃–H₂SO₄– H₂O and a deep understanding of the role of H₂SO₄ in the indust ...
DOI:
10.1002/jctb.6254