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1. A model for predicting the separation performance of a coupling cyclone with a built-in granular bed filter

Author:
Ming Chang; Yiping Fan; Jinzhuang Fu; Yongqi Li; Chunxi Lu
Source:
Powder technology 2022 v.399 pp. 116941
ISSN:
0032-5910
Subject:
couplings; cyclone separators; data analysis; dust; dusting; filters; gases; models; powders; prediction
Abstract:
... A separator coupling cyclone with built-in granular bed filter was proposed for gas purification. By analyzing available data in published literature and experimental results, a new model for predicting the separation performance of the coupled separator was obtained by regressing against a broad range of parameter governing the dusts collection in the coupled separator. In particular, the mutual ...
DOI:
10.1016/j.powtec.2021.10.049

2. A novel way to facilely degrade organic pollutants with the tail-gas derived from PHP (phosphoric acid plus hydrogen peroxide) pretreatment of lignocellulose

Author:
Miao Lei; Fei Shen; Jinguang Hu; Li Zhao; Mei Huang; Jianmei Zou; Dong Tian; Gang Yang; Yongmei Zeng; Shihuai Deng
Source:
Journal of hazardous materials 2022 v.424 pp. 127517
ISSN:
0304-3894
Subject:
cytotoxicity; decolorization; feedstocks; fuel production; gases; hexachlorobenzene; hydrogen peroxide; latex; lignocellulose; malachite green; methyl orange; methylene blue; phosphoric acid; pollutants; resorcinol; rhodamines; silicone; spectrometers; survival rate; tetracycline
Abstract:
... The abundantly released tail-gas from lignocellulose pretreatment with phosphoric acid plus hydrogen peroxide (PHP) was found to accelerate the aging of latex/silicone textural accessories of the pretreatment device. Inspired by this, tail-gas was utilized to control organic pollutants. Methylene blue (MB), as a model pollutant, was rapidly decolorized by the tail-gas, and oxidative degradation wa ...
DOI:
10.1016/j.jhazmat.2021.127517

3. Effect of Cage Occupancy on Stability and Decomposition of Methane Hydrate

Author:
Dilare Kainai; Dongsheng Bai
Source:
Journal of physical chemistry 2022 v.126 no.2 pp. 492-502
ISSN:
1520-5207
Subject:
concentrates; concentrating; exhibitions; gas hydrate; gases; journals; melting; methane; surface area; wills
Abstract:
... Gas hydrates usually contain a certain number of empty cages that will both affect the hydrate stability and reduce the gas storage capacity. In this work, by MD simulations, we found that the hydrate stability is related to the cage occupancy, the empty cage types, and especially the distribution of empty cages. With the decrease of overall occupancy, the stability of hydrate becomes worse. Under ...
DOI:
10.1021/acs.jpcb.1c07582

4. Long-term environmental surveillance of PM2.5-bound polycyclic aromatic hydrocarbons in Jinan, China (2014–2020): Health risk assessment

Author:
Zhigang Yu; Hong Wang; Xin Zhang; Shuping Gong; Zhen Liu; Ning Zhao; Cuiqin Zhang; Xiaorui Xie; Kaige Wang; Zhong Liu; Jia-Sheng Wang; Xiulan Zhao; Jun Zhou
Source:
Journal of hazardous materials 2022 v.425 pp. 127766
ISSN:
0304-3894
Subject:
coal; environmental monitoring; gases; health effects assessments; lung neoplasms; people; thyroid neoplasms; toxicity; traffic; winter; China
Abstract:
... We established long-term surveillance sites in Jinan city to monitor PM₂.₅ particles (PM2.5) and PM2.5-bound PAHs (2014–2020). The range of PM2.5 was 15–230 µg/m³. The average annual ƩPAH₁₆ were 433 ± 271 ng/m³ (industrial area) and 299 ± 171.8 ng/m³ (downtown). PAHs captured in winter accounted for 61.5% (industrial area) and 59.1% (downtown) of total PAHs. A hazardous seasonal benzo[a]pyrene lev ...
DOI:
10.1016/j.jhazmat.2021.127766

5. New Insights into the Occurrence and Implications of Mobile Water in Gas Hydrate Systems

Author:
Ray Boswell; Koji Yamamoto; Machiko Tamaki; Timothy S. Collett; George Moridis; Evgeniy Myshakin
Source:
Energy & fuels 2022 v.36 no.5 pp. 2447-2461
ISSN:
1520-5029
Subject:
energy; fields; gas hydrate; gases; production technology; seals; water reservoirs; wells
Abstract:
... Gas hydrate production technologies commonly feature reservoir depressurization. Depressurization occurs when a pressure gradient is established in a well, drawing mobile water from the reservoir and reducing reservoir pressure. As such, the occurrence of mobile water is a necessary condition for effective gas production from gas hydrate reservoirs using common borehole-based methods. However, rec ...
DOI:
10.1021/acs.energyfuels.1c04101

6. Study on dry desulfurization performance of MnOx hydrothermally loaded halloysite desulfurizer

Author:
Zhang Lei; Shu Hao; Wang Yusu; Jia Yang
Source:
Environmental technology & innovation 2022 v.26 pp. 102308
ISSN:
2352-1864
Subject:
chitosan; desulfurization; environmental technology; gases; gels; halloysite; hot water treatment; manganese; manganese monoxide; microparticles; pollutants; pollution; temperature
Abstract:
... The quenching process has the characteristics of complex pollutant composition, high purification difficulty, and serious environmental pollution. In order to meet the national emission standards, the coke quenching tail gas containing SO₂ must be treated. In this paper, halloysite is selected as carrier, modified by low-temperature molten salt etching, manganese oxide is supported by hydrothermal ...
DOI:
10.1016/j.eti.2022.102308

7. A flexible microporous framework with temperature-dependent gate-opening behaviours for C2 gases

Author:
Zhenyu Ji; Yerong Fan; Mingyan Wu; Maochun Hong
Source:
Chemical communications 2021 v.57 no.31 pp. 3785-3788
ISSN:
1364-548X
Subject:
ambient temperature; behavior; chemical communication; gases; porous media
Abstract:
... Herein we report a two-fold interpenetrating pillar-layer microporous material, whose framework severely shrinks after losing guest molecules and transforms into a stable nonporous one. More importantly, the guest-free framework has rarely seen temperature-dependent gate-opening behaviours for C2 gases around room temperature. ...
DOI:
10.1039/d1cc00014d

8. A fully implicit coupled pore-network/free-flow model for the pore-scale simulation of drying processes

Author:
K. Weishaupt; T. Koch; R. Helmig
Source:
Drying technology 2022 v.40 no.4 pp. 697-718
ISSN:
1532-2300
Subject:
couplings; drying; dynamic models; energy flow; equations; gases; simulation models; technology
Abstract:
... We present a fully coupled pore-network/free-flow model providing pore-scale insight into drying processes. We solve the Navier–Stokes equations with component transport in the free-flow region, coupled to a dynamic two-phase, two-component pore-network model (PNM) in the porous domain. The dynamic multi-physics model allows to temporally resolve drying processes in-between capillary equilibrium s ...
DOI:
10.1080/07373937.2021.1955706

9. A green and efficient route for simultaneous recovery of low valence of vanadium and chromium, titanium and iron from vanadium slag

Author:
Zhenghao Wang; Liang Chen; Zhifeng Qin; Ke Yang; Bin Liang; Guoquan Zhang; Changjun Liu; Dongmei Luo
Source:
Resources, conservation, and recycling 2022 v.178 pp. 106046
ISSN:
0921-3449
Subject:
alloys; batteries; chromium; gases; industry; iron; leachates; slags; sulfuric acid; sustainable development; sustainable technology; temperature; titanium; toxicity; vanadium; wastewater
Abstract:
... Traditional methods to recover vanadium from vanadium slag by oxidizing V(III) in slag to V(V) at above 800 °C, result in discharge of significant amount of residue containing Cr, Ti, Fe, and wastewater containing highly toxic V(V) and Cr(VI). Then V₂O₅ was reduced to low valence vanadium (LVV) for applications, such as vanadium flow battery, vanadium alloy. It is necessary to effectively utilize ...
DOI:
10.1016/j.resconrec.2021.106046

10. A review on the potentials of flare gas recovery applications in Iran

Author:
Amirhossein Khalili-Garakani; Mona Iravaninia; Mahya Nezhadfard
Source:
Journal of cleaner production 2021 v.279 pp. 123345
ISSN:
0959-6526
Subject:
burning; emissions; exhibitions; financial economics; gases; greenhouse gases; methodology; power generation; value-added products; Iran
Abstract:
... Due to safety and control considerations, gas flaring is inevitable in chemical processes. In 2018, 17.3 billion cubic meters of flare gas had burned in Iran, which implies a significant economic loss and the emission of almost 150 million metric tons of greenhouse gases to the atmosphere. This significant amount of flaring has made Iran the third largest flaring country in the world. Various meth ...
DOI:
10.1016/j.jclepro.2020.123345

11. An Illustrative Analysis of Atypical Gas Production Profiles Obtained from In Vitro Digestibility Studies Using Fecal Inoculum

Author:
Mewa S. Dhanoa; Secundino López; Christopher D. Powell; Ruth Sanderson; Jennifer L. Ellis; Jo-Anne M. D. Murray; Anna Garber; Barbara A. Williams; James France
Source:
Animals 2021 v.11 no.4 pp. -
ISSN:
2076-2615
Subject:
animals; digestibility; equations; gases; inoculum; mathematical models
Abstract:
... Gas production profiles typically show a monotonically increasing monophasic pattern. However, atypical gas production profiles exist whereby at least two consecutive phases of gas production or additional extraneous features that distort the typical profile are present. Such profiles are more likely to occur with the use of a fecal inoculum and are much less well described. The presence of multip ...
DOI:
10.3390/ani11041069

12. An Overview of Ammonia Separation by Ionic Liquids

Author:
Lu Zhang; Haifeng Dong; Shaojuan Zeng; Zongyuan Hu; Shahid Hussain; Xiangping Zhang
Source:
Industrial & engineering chemistry process design and development 2021 v.60 no.19 pp. 6908-6924
ISSN:
1520-5045
Subject:
absorption; ammonia; diffusivity; energy conservation; gases; industrial applications; mass transfer; pollutants; pollution; process design; solubility; toxicity; vapor pressure
Abstract:
... Ammonia (NH₃) is an important chemical in several fields, such as agriculture, pharmaceutical, material, and chemicals manufacturing. However, NH₃ is a toxic gaseous pollutant and NH₃ release results in environment pollution. Minimizing NH₃ emission is of great significance for solving NH₃-related environmental issues and promoting the reuse of NH₃ resources. Ionic liquids (ILs) are energy-saving ...
DOI:
10.1021/acs.iecr.1c00780

13. Carbon molecular sieve hollow fiber membranes derived from dip-coated precursor hollow fibers comprising nanoparticles

Author:
Yuhe Cao; Kuang Zhang; Chen Zhang; William J. Koros
Source:
Journal of membrane science 2022 v.649 pp. 120279
ISSN:
0376-7388
Subject:
carbon; coatings; composite materials; gases; journals; methodology; nanoparticles; sieves; sieving; skinning
Abstract:
... We report a novel approach to economically fabricate dual-layer composite nanoparticle-containing carbon molecular sieve (CMS) hollow fiber membranes having excellent gas separation performance. The economically favored process comprises dip coating engineered support layer fibers to form a dense skin layer in a CMSCMS precursor. The coated fibers are then pyrolyzed to form a high-performance CMS ...
DOI:
10.1016/j.memsci.2022.120279

14. Cleanly synthesizing rotten potato-based activated carbon for supercapacitor by self-catalytic activation

Author:
Ao Wang; Kang Sun; Ruting Xu; Yunjuan Sun; Jianchun Jiang
Source:
Journal of cleaner production 2021 v.283 pp. 125385
ISSN:
0959-6526
Subject:
activated carbon; biomass; capacitance; catalysts; electrochemical capacitors; energy density; exhibitions; gases; materials; metals; potatoes; pyrolysis; reliability; surface area; wastes
Abstract:
... A novel self-catalytic activation approach is developed for the preparation of hierarchically porous carbon from rotten potato wastes. Metals already existing within the rotten potatoes were used as the catalysts and gases emitted during pyrolysis were used as the activating reagents, leading to the cleaner production of hierarchically porous carbon materials without additional reagents. The as-ma ...
DOI:
10.1016/j.jclepro.2020.125385

15. Conceptual design, optimization and thermodynamic analysis of a CO2 capture process based on Rectisol

Author:
Sheng Yang; Lu Zhang; Dongran Song
Source:
Energy 2022 v.244 pp. 122566
ISSN:
0360-5442
Subject:
byproducts; carbon dioxide; environmental protection; exergy; gases; models; temperature
Abstract:
... Reducing CO₂ emission is particularly important for environmental protection. Much absorbed CO₂ in the conventional Rectisol process is discharged as tail gas due to the lacked attention to the by-product CO₂. In this paper, a novel CO₂ capture process, which is improved from the conventional Rectisol process, is proposed to reduce the emission of CO₂. The revised CPA model shows a good performanc ...
DOI:
10.1016/j.energy.2021.122566

16. Design of a gas-system for testing the phosphine protection of canisters in respirators

Author:
Pengcheng Cui; Changyao Shan; Xin Chen; Lijun Wang; Xiao He; Tao Zhang
Source:
Journal of stored products research 2022 v.95 pp. 101920
ISSN:
0022-474X
Subject:
equipment; fumigants; fumigation; gases; humidity; nitrogen; phosphine; research; temperature
Abstract:
... The canister is a critical component of non-powered air-purifying respirators that protects operators from fumigation environments but which typically lacks equipment for the detection of harmful agents. Based on research of the common fumigant phosphine, a device is herein designed to test the phosphine filtering ability of different canisters, and methods of device operation are discussed. The e ...
DOI:
10.1016/j.jspr.2021.101920

17. Different bubble behaviors in gas-solid fluidized bed of Geldart group A and group C+ particles

Author:
Yandaizi Zhou; Jingrui Xu; Jesse Zhu
Source:
Powder technology 2021 v.384 pp. 431-441
ISSN:
0032-5910
Subject:
behavior; bubbles; fluidized beds; gases; particles; powders; technology
Abstract:
... A gas-solid fluidized bed reactor composed of Geldart Group C fine powers with the addition of nano-additives (Group C⁺) has recently been shown to have higher reaction conversion and better contact efficiency than the same reactor composed of Geldart Group A particles due to the increased gas holdup in the dense phase and the increased gas-solid interfacial area. Based on our earlier findings tha ...
DOI:
10.1016/j.powtec.2021.02.033

18. Effect of CO₂/H₂O on adsorptive removal of H₂S/SO₂ mixture

Author:
Jianyu Xuan; Chenyang Wang; Lin Zhang; Qun Cui; Haiyan Wang
Source:
Environmental technology 2022 v.43 no.13 pp. 2069-2079
ISSN:
1479-487X
Subject:
activated carbon; adsorption; carbon dioxide; desulfurization; environmental technology; gases; sulfur; sulfuric acid
Abstract:
... Few studies focus on the simultaneous removal performance and mechanism of H₂S and SO₂ mixture in Claus tail gas with a high concentration of H₂O (20–30 vol.%) and CO₂ (8–10 vol.%). In this paper, the effects of H₂O and CO₂ on the simultaneous removal of H₂S and SO₂ for the by activated carbon (TL-1) were studied. Fresh (TL-1-F) and desulfurisation sulfur-loaded TL-1 activated samples (TL-1-E1 and ...
DOI:
10.1080/09593330.2020.1866084

19. Effective aperture tuning of a zeolitic-imidazole framework CdIF-1 by controlled thermal amorphization

Author:
Sunghwan Park; Hae-Kwon Jeong
Source:
Journal of materials chemistry A 2022 v.10 no.9 pp. 4992-4998
ISSN:
2050-7496
Subject:
adsorption; exhibitions; gases; journals; materials; screening; separation; sieves; sieving; temperature
Abstract:
... Sodalite zeolitic-imidazole frameworks (ZIFs) show great potential due to their effective aperture sizes suitable for small gas separations. Numerous efforts have, therefore, been made in tuning their effective aperture sizes to control and enhance their molecular sieving properties. Herein, we present a new strategy to finely tune the effective aperture size of CdIF-1, a cadmium-substituted ZIF-8 ...
DOI:
10.1039/d1ta10706b

20. Effects of Agriculture and Animal Husbandry on Heavy Metal Contamination in the Aquatic Environment and Human Health in Huangshui River Basin

Author:
Long Zhang; Xianfeng Tan; Hongnian Chen; Yalin Liu; Zhaojie Cui
Source:
Water 2022 v.14 no.4 pp. -
ISSN:
2073-4441
Subject:
animal husbandry; aquatic environment; arsenic; atmospheric deposition; cadmium; carcinogenicity; gases; health effects assessments; heavy metals; human health; industrial wastewater; models; nickel; risk; risk assessment process; rivers; traffic; water; watersheds; China
Abstract:
... Huangshui River (HSR) is the mother river of Qinghai province. Croplands and grasslands cover more than 76% of the total area, and highland agriculture and animal husbandry are the dominant industries. The use of pesticides, fertilizers, and feed additives increases the risk of heavy metal (HM) contamination. In this study, the concentration of HMs in the main stream and tributaries of HSR were in ...
DOI:
10.3390/w14040549