Air Filtration: A Controlled Design of Ripple-Like Polyamide-6 Nanofiber/Nets Membrane for High-Efficiency Air Filter (Small 10/2017)

Each combustion turbine installation has peculiar to it site-related characteristics that, if considered carefully, will define the type of inlet system that best fits the operational requirements. Historically, and unless owner specified, the OEM/Packager supplies his standard, all-purpose air filter configuration as an integral part of the package. The standard may or may not be the best selection for filtering combustion inlet air at the intended specific site location. This technical paper will match inlet air filtration systems to several typical ambient conditions, using laboratory tests and actual site experience. This paper can also be used as a technically current selection guide for those considering various inlet air filtration requirements for new and retrofit systems.

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Development of SPI/AC/PVA nano-composite for air-filtration and purification

Research Journal of Textile and Apparel ◽

10.1108/rjta-09-2019-0044 ◽

2020 ◽

Vol 24 (1) ◽

pp. 72-83 ◽

Cited By ~ 1

Author(s):

Gobi Nallathambi ◽

Berly Robert ◽

Sharon Preethi Esmeralda ◽

Janani Kumaravel ◽

Vinitha Parthiban

Keyword(s):

Particulate Matter ◽

Soy Protein ◽

Active Sites ◽

High Efficiency ◽

High Surface ◽

Nanofibrous Membrane ◽

Dual Function ◽

Air Filtration ◽

Air Filter ◽

Content Type

Purpose Development of high efficiency nanofibrous air filter membrane by electrospinning process, to address the air pollution (both the particulate matter and the gaseous components) problem, which has become a major environmental concern. Design/methodology/approach By exploiting the advantage of active sites on soy protein isolate (SPI), the very high surface area of micro-pore rich activated carbon (AC) and the biocompatibility and biodegradable nature of polyvinyl alcohol (PVA). The authors have developed a SPI/AC/PVA hybrid membrane. Spun-bond nonwoven substrate was used as the support material to enhance the mechanical properties and also the filter handling properties. The properties of nanofibrous membrane including morphology, air permeability, filtration efficiency and formaldehyde absorption test were carried out as per standard test methods. Findings SPI-based membrane offers a great potential in air filtration/purification applications. Its potential to capture glancing pollutants at the molecular level is because of the presence of numerous functional groups on the soy protein surface, which enhances the adsorption of particulate matter and toxic gases, even bacteria and viruses to its surface. Originality/value The results are anticipated to provide a potential method to promote the development of a nanofibrous membrane, which can act as a high performance, dual function and eco-friendly air filter/purifier.

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The Effect of Mobile Indoor Air Cleaners on the Risk of Infection with SARS-CoV-2 in Surgical Examination and Treatment Rooms with Limited Ventilation Options

Austin Journal of Public Health and Epidemiology ◽

10.26420/austinjpublichealthepidemiol.2021.1094 ◽

2021 ◽

Vol 8 (1) ◽

Author(s):

Oberst M ◽

◽

Klar T ◽

Heinrich A ◽

◽

...

Keyword(s):

Indoor Air ◽

High Efficiency ◽

Air Filtration ◽

Air Filter ◽

Filter System ◽

Air Cleaner ◽

Air Cleaners ◽

Total Particle ◽

Poor Ventilation ◽

Examination Room

Objective: Due to the airborne transmission of the Coronavirus Disease (Covid-19) via aerosols, we investigated the effect of a mobile air filter system in a surgical examination room. Methods: A mobile indoor air cleaner (AP 90, DEMA-airtech, Germany) was run during regular surgical consulting hour in our outpatient’s clinic. Aerosol concentration was measured by Fidas Frog fine dust monitoring system (Palas, Germany) by constantly recording PM1.0, PM2.5, PM4, PM10 and the total particle load PMtot. Results: The use of the air filter system led to a significant reduction of aerosols in the room despite the fact that there were various numbers of persons in the room constantly. Conclusion: The use of a high efficiency air filtration device, especially in examination rooms with poor ventilation, e.g., lack of windows or local exhaust is recommendable.

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A Controlled Design of Ripple-Like Polyamide-6 Nanofiber/Nets Membrane for High-Efficiency Air Filter

Small ◽

10.1002/smll.201603151 ◽

2017 ◽

Vol 13 (10) ◽

pp. 1603151 ◽

Cited By ~ 65

Author(s):

Shichao Zhang ◽

Hui Liu ◽

Fenglei Zuo ◽

Xia Yin ◽

Jianyong Yu ◽

...

Keyword(s):

High Efficiency ◽

Polyamide 6 ◽

Air Filter

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Air filtration improvement of konjac glucomannan-based aerogel air filters through physical structure design

International Journal of Low-Carbon Technologies ◽

10.1093/ijlct/ctab011 ◽

2021 ◽

Author(s):

Hong Qian ◽

Ying Fang ◽

Kao Wu ◽

Hao Wang ◽

Bin Li ◽

...

Keyword(s):

Pore Size Distribution ◽

Pore Size ◽

Size Distribution ◽

Surface Area ◽

Physical Structure ◽

Structure Design ◽

Air Filtration ◽

Air Filters ◽

Air Filter ◽

Purification Time

Abstract This study presents two methods to improve the air filtration performance of konjac glucomannan (KGM)-based aerogel air filters through physical structure design by changing the pore-size distribution and the surface area, using an air purifier. Results indicated that KGM-based aerogels had a comparable filtration effect with the commercial air filter with a longer purification time. This purification time could be shortened by over 50%, by changing the pore-size distribution from large size to small size or increase the surface area with the fold structure. This should boost the development of polysaccharide-based aerogel used as the air filter.

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Awareness of aerosol-related transmission of COVID-19 among the dentists of Nepal

BDJ Open ◽

10.1038/s41405-021-00079-0 ◽

2021 ◽

Vol 7 (1) ◽

Author(s):

Nashib Pandey ◽

Buddha Bahadur Basnet ◽

Sushmit Koju ◽

Anju Khapung ◽

Alka Gupta

Keyword(s):

Social Sciences ◽

Particle Size ◽

High Efficiency ◽

Emergency Services ◽

Uv Light ◽

Ventilation System ◽

Age Groups ◽

Air Filtration ◽

Online Questionnaire ◽

Dental Practitioners

Abstract Objective To access the awareness of dental practitioners of Nepal towards COVID-19 transmission through aerosols. Materials and methods The study involved 384 dentists from all over Nepal and was conducted for a period of 3 months. A self-reported online questionnaire was developed using Google forms and the link was shared. It emphasized the awareness related to the aerosol and ventilation system in their daily practices was prepared. The data were analyzed in Statistical Package for Social Sciences version 20.0 software. Results The majority of participants were female 52.9% (n = 203) and within the age groups of <30 years 57% (n = 219). Participants from Bagmati Province were 60.4% (n = 232), with least from Sudurpaschim Province 0.5% (n = 2). 60% of participants provided only emergency services during the COVID-19 pandemic and few (7%) provided consultations via telephone. The current ventilation system used was a well-ventilated room with open windows 65.4% (n = 251). However, 52.8% (n = 203) preferred specialized operatory incorporating high-efficiency particulate air (HEPA) filters and ultraviolet (UV) light. More than 60% of respondents were unaware of the particle size of the aerosol. Conclusions The obtained results signify the need for the proper ventilation system with appropriate air filtration systems in dental clinical setups.

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Evolution of Gas Turbine Intake Air Filtration in a 420 MW Cogeneration Plant

Volume 3A: Coal, Biomass and Alternative Fuels; Cycle Innovations; Electric Power; Industrial and Cogeneration ◽

10.1115/gt2014-25670 ◽

2014 ◽

Cited By ~ 1

Author(s):

Steve Ingistov ◽

Michael Milos ◽

Rakesh K. Bhargava

Keyword(s):

Gas Turbine ◽

Gas Turbines ◽

Economic Benefits ◽

Cogeneration Plant ◽

Air Filtration ◽

Air Filter ◽

Filter System ◽

Turbine Performance ◽

Filtration System ◽

Operational Data

A suitable inlet air filter system is required for a gas turbine, depending on installation site and its environmental conditions, to minimize contaminants entering the compressor section in order to maintain gas turbine performance. This paper describes evolution of inlet air filter systems utilized at the 420 MW Watson Cogeneration Plant consisting of four GE 7EA gas turbines since commissioning of the plant in November 1987. Changes to the inlet air filtration system became necessary due to system limitations, a desire to reduce operational and maintenance costs, and enhance overall plant performance. Based on approximately 2 years of operational data with the latest filtration system combined with other operational experiences of more than 25 years, it is shown that implementation of the high efficiency particulate air filter system provides reduced number of crank washes, gas turbine performance improvement and significant economic benefits compared to the traditional synthetic media type filters. Reasons for improved gas turbine performance and associated economic benefits, observed via actual operational data, with use of the latest filter system are discussed in this paper.

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High-efficiency particulate air filter test stand and aerosol generator for particle loading studies

Review of Scientific Instruments ◽

10.1063/1.2771421 ◽

2007 ◽

Vol 78 (8) ◽

pp. 085105 ◽

Cited By ~ 7

Author(s):

R. Arunkumar ◽

Kristina U. Hogancamp ◽

Michael S. Parsons ◽

Donna M. Rogers ◽

Olin P. Norton ◽

...

Keyword(s):

High Efficiency ◽

Test Stand ◽

Particle Loading ◽

Air Filter ◽

Aerosol Generator ◽

Filter Test

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Biological safety cabinetry.

Clinical Microbiology Reviews ◽

10.1128/cmr.4.2.207 ◽

1991 ◽

Vol 4 (2) ◽

pp. 207-241 ◽

Cited By ~ 36

Author(s):

R H Kruse ◽

W H Puckett ◽

J H Richardson

Keyword(s):

Antineoplastic Agents ◽

High Efficiency ◽

Class Ii ◽

Class Iii ◽

Clean Room ◽

Air Filter ◽

Biological Safety ◽

Design Function ◽

Laboratory Workers ◽

The One

The biological safety cabinet is the one piece of laboratory and pharmacy equipment that provides protection for personnel, the product, and the environment. Through the history of laboratory-acquired infections from the earliest published case to the emergence of hepatitis B and AIDS, the need for health care worker protection is described. A brief description with design, construction, function, and production capabilities is provided for class I and class III safety cabinets. The development of the high-efficiency particulate air filter provided the impetus for clean room technology, from which evolved the class II laminar flow biological safety cabinet. The clean room concept was advanced when the horizontal airflow clean bench was manufactured; it became popular in pharmacies for preparing intravenous solutions because the product was protected. However, as with infectious microorganisms and laboratory workers, individual sensitization to antibiotics and the advent of hazardous antineoplastic agents changed the thinking of pharmacists and nurses, and they began to use the class II safety cabinet to prevent adverse personnel reactions to the drugs. How the class II safety cabinet became the mainstay in laboratories and pharmacies is described, and insight is provided into the formulation of National Sanitation Foundation standard number 49 and its revisions. The working operations of a class II cabinet are described, as are the variations of the four types with regard to design, function, air velocity profiles, and the use of toxins. The main certification procedures are explained, with examples of improper or incorrect certifications. The required levels of containment for microorganisms are given. Instructions for decontaminating the class II biological safety cabinet of infectious agents are provided; unfortunately, there is no method for decontaminating the cabinet of antineoplastic agents.

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