• Title/Summary/Keyword: $VOC_s$

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Toxicity Reduction of VOCs by Catalytic Oxidation Mechanism (VOCs의 촉매산화 메커니즘에 의한 독성 저감효과)

  • 이재동
    • Journal of environmental and Sanitary engineering
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    • v.15 no.3
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    • pp.88-93
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    • 2000
  • The objective of this study was to depict the kinetic behavior of the platinum catalyst for the deep oxidation of VOCs and their mixture. The oxidation characteristics of VOCs, which were benzene, toluene, and styrene, was studies on a 0.5% $Pt/{\gamma}-Al_2O_3$ catalyst. The reactivity increases in order benzene>toluene>styrene. In mixtures, remarkable effects on reaction rate and selectivity have been evident ; the strongest inhibiting effect was shown by styrene and increases in a reverse order with respect to that of reactivity. The reaction model reveals that there is a competition between the two reactants for the oxidized catalyst. Thus, the nontoxic catalytic oxidation process was suggested as the new VOCs control technology.

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Re-illumination of VOC analysis

  • Bae SungMin
    • Proceedings of the Korean Society for Quality Management Conference
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    • 2004.04a
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    • pp.633-638
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    • 2004
  • Main purpose of existing VOC (the voice of customer) analysis is suppressing the VOC occurrence. But, in real situation, it is impossible to reduce the VOC occurrence to the zero level. Company's strategy to decrease specific customer complaints may cause another customer's complaints increase. Especially, in a financial industry, customer complaints are directly connected with company's profit. That is, the VOC from their profitable customer, product and channel is major concern of companies. In this paper, 1 reveal the relationship between CRM (customer relationship management) activity and VOC analysis and various analysis methods.

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Trends and Control Technologies of Volatile Organic Compound (국내의 휘발성유기화합물(VOC) 현황 및 관리기술)

  • Kim, Jo-Chun
    • Journal of Korean Society for Atmospheric Environment
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    • v.22 no.6
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    • pp.743-757
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    • 2006
  • Volatile organic compound (VOC) has been well-known to Korea since the end of 1990's however, it has not been well documented until now. In this study, present ambient VOC levels, VOC emission sources, and VOC control technologies were reviewed and discussed. In addition, VOC management strategies to cut down ozone concentrations were suggested based on the present VOC database. For anthropogenic VOC reduction, VOC emitted from painting processes and automobiles should be controlled in the first place in large cities such as Seoul, Daegu, and Incheon. For natural VOC management, low emission trees need to be planted in those cities. It is also very significant to keep updating present and future VOC emission inventories for efficient VOC control strategies. As a conclusion, more systematic VOC control road-map based on BACT (best available control technology) needs to be made up. and more economical and efficient VOC control techniques have to be developed under strong national support in order to lower toxic VOC and photochemical oxidant levels.

A Integrated VOC Management Schema in Large-Scale Manufacturing Companies: A Case Study on Implementation for Construction Equipment Division in 'H' Heavy Industry (대규모 제조업에서의 통합 VOC 관리 방안 및 시스템 구축: 'H' 중공업 건설장비 부문 적용 사례)

  • Jang, Gil-Sang
    • Journal of the Korea Society of Computer and Information
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    • v.14 no.8
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    • pp.127-136
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    • 2009
  • Voice of the customer(VOC) is a term used in business and information technology(IT) to describe the process of capturing a customer's requirements in enterprises or various organizations. Recently, in order to satisfy customer's needs, enterprises try to utilize VOC at recurrence prevention of problems and their improvement activities, planning and development of product/service by processing, storing, and analyzing VOC. Until now, VOC management systems are introduced around service industries such as hotel business and insurance/financial business, etc. This paper proposes an integrated management scheme of VOC which are captured by various communication channels and describes a case of implementing an integrated VOC management system on the basis of the proposed scheme for the large-scale manufacturing company. By the implemented system, VOC are stored and utilized as the important knowledge assets of enterprises.

Micrometeorological measurements of VOC fluxes from Nan-Ji-Do landfill area during Spring 2000 (미기상학적 기법을 이용한 난지도 매립지에서 VOCs의 Air/Soil 교환량 측정)

  • 김민영;김기현;이강웅
    • Proceedings of the Korea Air Pollution Research Association Conference
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    • 2000.11a
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    • pp.76-77
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    • 2000
  • 최근 들어 대도시와 그 주변지역을 중심으로 빈번하게 발생하는 광화학적 오염에 VOCs가 기여하는 바가 크다는 것은 주지의 사실이다. VOCs가 이와 같은 국지적인 광화학적 오염에 지대한 영향을 줄뿐만 아니라 지역 규모에서도 대기 중의 화학적인 조성과 산화력을 결정하고 있어서 이들의 발생, 화학적 변환, 소멸에 따른 기작과 동태를 규명하는 것이 대기 화학에서 중요한 부분으로 생각되고 있다. (중략)

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A study on the Emission Characteristics and the Estimation of Emission for VOCs from Landfills (매립지에서의 VOCs 배출특성과 배출량 산정에 관한 연구)

  • 임지영;최용흠;신원근;김기현;홍지형;선우영
    • Proceedings of the Korea Air Pollution Research Association Conference
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    • 2003.05b
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    • pp.297-298
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    • 2003
  • 대기 광화학반응에서 오존 및 기타 광산화물을 생성하는 VOCs의 경우, 그 물질 자체가 갖는 독성도 물질에 따라 매우 큰 것으로 알려져 있다. 따라서 이와 관련된 많은 연구가 진행되어 왔으며, 이에 대한 규제방안 역시 지속적으로 논의되고 있으나, 이러한 연구 및 정책의 기본 자료인 VOCs의 배출량에 관련된 자료 및 연구가 매우 부실한 실정이다. 또한 이들 연구는 대부분 VOCs의 주요 배출원이라 할 수 있는 도장산업이나 자동차에 집중됨으로써 대기오염이 심각한 도시지역에 소규모로 넓게 분포하고 있는 VOCs의 배출원에 대한 연구가 미진하고, 이에 따라 전체 VOCs의 배출량에 많은 오차를 나타낼 수 있는 조건을 만들고 있다. (중략)

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The Comparison of $VOC_s$ Concentration in Several Industrial Complex Using Passive Sampler (Passive Sampler를 활용한 공업단지별 $VOC_s$ 농도 비교)

  • 정의석;인치경;박민수;김선태
    • Proceedings of the Korea Air Pollution Research Association Conference
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    • 1999.10a
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    • pp.141-142
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    • 1999
  • 차량의 증가와 각종 산업분야에서의 유기용제 사용에 따른 VOC 물질의 증가는 발암성과 관련된 환경보건 및 오존의 전구물질 등 기타 복잡한 대기화학과도 긴밀하게 연루되어 있다. 또한, VOC는 공단지역에서 지역주민에게 악취를 유발시키는 있어 악취와 건강보건에 있어서 집중적인 관리가 요구된다고 하겠다.(중략)

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Intelligent VOC Analyzing System Using Opinion Mining (오피니언 마이닝을 이용한 지능형 VOC 분석시스템)

  • Kim, Yoosin;Jeong, Seung Ryul
    • Journal of Intelligence and Information Systems
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    • v.19 no.3
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    • pp.113-125
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    • 2013
  • Every company wants to know customer's requirement and makes an effort to meet them. Cause that, communication between customer and company became core competition of business and that important is increasing continuously. There are several strategies to find customer's needs, but VOC (Voice of customer) is one of most powerful communication tools and VOC gathering by several channels as telephone, post, e-mail, website and so on is so meaningful. So, almost company is gathering VOC and operating VOC system. VOC is important not only to business organization but also public organization such as government, education institute, and medical center that should drive up public service quality and customer satisfaction. Accordingly, they make a VOC gathering and analyzing System and then use for making a new product and service, and upgrade. In recent years, innovations in internet and ICT have made diverse channels such as SNS, mobile, website and call-center to collect VOC data. Although a lot of VOC data is collected through diverse channel, the proper utilization is still difficult. It is because the VOC data is made of very emotional contents by voice or text of informal style and the volume of the VOC data are so big. These unstructured big data make a difficult to store and analyze for use by human. So that, the organization need to automatic collecting, storing, classifying and analyzing system for unstructured big VOC data. This study propose an intelligent VOC analyzing system based on opinion mining to classify the unstructured VOC data automatically and determine the polarity as well as the type of VOC. And then, the basis of the VOC opinion analyzing system, called domain-oriented sentiment dictionary is created and corresponding stages are presented in detail. The experiment is conducted with 4,300 VOC data collected from a medical website to measure the effectiveness of the proposed system and utilized them to develop the sensitive data dictionary by determining the special sentiment vocabulary and their polarity value in a medical domain. Through the experiment, it comes out that positive terms such as "칭찬, 친절함, 감사, 무사히, 잘해, 감동, 미소" have high positive opinion value, and negative terms such as "퉁명, 뭡니까, 말하더군요, 무시하는" have strong negative opinion. These terms are in general use and the experiment result seems to be a high probability of opinion polarity. Furthermore, the accuracy of proposed VOC classification model has been compared and the highest classification accuracy of 77.8% is conformed at threshold with -0.50 of opinion classification of VOC. Through the proposed intelligent VOC analyzing system, the real time opinion classification and response priority of VOC can be predicted. Ultimately the positive effectiveness is expected to catch the customer complains at early stage and deal with it quickly with the lower number of staff to operate the VOC system. It can be made available human resource and time of customer service part. Above all, this study is new try to automatic analyzing the unstructured VOC data using opinion mining, and shows that the system could be used as variable to classify the positive or negative polarity of VOC opinion. It is expected to suggest practical framework of the VOC analysis to diverse use and the model can be used as real VOC analyzing system if it is implemented as system. Despite experiment results and expectation, this study has several limits. First of all, the sample data is only collected from a hospital web-site. It means that the sentimental dictionary made by sample data can be lean too much towards on that hospital and web-site. Therefore, next research has to take several channels such as call-center and SNS, and other domain like government, financial company, and education institute.

A Trend of VOC(Volatile Organic Compound) Control and Patent Analysis on the VOC Control Technical (국내의 VOC 제거 및 회수에 대한 연구동향 및 특허분석)

  • Kim, Pilh-Hwan;Hua, Jin-Mei;Lee, Byung-Ho;Jeong, Hyo-Min;Chung, Han-Shik
    • Proceedings of the SAREK Conference
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    • 2007.11a
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    • pp.132-135
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    • 2007
  • VOCs(Volatile Organic Compounds) have been recently enacted by several regulations to the environment since the end of 1990's. So, it need to control emissions of VOCs from industrial cite. VOC controls include all technologies which either collect the VOCs for recovery and reuse or destroy the VOCs. In this study, the VOC control technical trend was searched. Additionally, it was compared to the number of patent along to the year in Korea.

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ADZ500 흡착제에 의한 아세톤 증기 중 수분의 선택흡착에 관한 연구

  • Na, Yeong-Su;Yun, Yeong-Sam;Jeong, Jae-Hyeon;Lee, Gwang-Ho;An, Chang-Deok
    • Proceedings of the Korean Environmental Sciences Society Conference
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    • 2007.05a
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    • pp.65-68
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    • 2007
  • 수분선택흡착-VOCs흡착-압축응축식 hybrid 공정에서 수분의 선택분리가 가능한 흡착제를 선정하였다. 또한 수분흡착탑에서 미리 수분을 제거하여 VOCs의 흡착효율을 높임으로써 배출환경기준을 만족시키고 수분 혼합성 VOCs와 수분 비혼합성 VOCs 회수가 가능한 공정 운영이 가능함을 알 수 있었고, 회수된 VOCs를 곧바로 생산 공정에 재투입할 수 있는 원료물질 수준으로 회수가 가능하였다.

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