Maintenance Performance Evaluation of an RCM Implementation: A Functional Oriented Case Study

Supriyanto, Hari; Kurniati, Nani; Supriyanto, M. F. R.

doi:10.18178/ijmerr.10.12.702-709

Cited by 12 publications

(15 citation statements)

References 26 publications

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“…Regarding the mechanism of pyrolysis, in polymers, such as polypropylene and polyethylene, the main constituents of face masks, the thermal decomposition process occurs by radical chain reactions and hydrogen transfer steps that gradually break the main chain through the elimination of small molecules. The mechanism has been previously discussed by other authors [48][49][50][51][52][53].…”

Section: Characterization Of Liquid Fractionmentioning

confidence: 70%

Characterization of the Products of the Catalytic Pyrolysis of Discarded COVID-19 Masks over Sepiolite

Ortega

Martín-Lara

Pula³

et al. 2023

Applied Sciences

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This research aims to develop a new strategy to valorize wasted COVID-19 masks based on chemical recycling by pyrolysis to convert them into useful products. First, surgical and filtering face piece masks, as defined in Europe by the EN 149 standard (FFP2), were thermally pyrolyzed at temperatures of 450, 500, and 550 °C, and the yields of valuable solid (biochar), liquid (biooil), and syngas products and their characteristics were determined. At low temperatures, biochar formation was favored over biooil and syngas production, while at high temperatures the syngas product yield was enhanced. The highest yield of biooil was found at a pyrolysis temperature of 500 °C, with both surgical and FFP2 masks achieving biooil yields of 59.08% and 58.86%, respectively. Then, the pyrolysis experiments were performed at 500 °C in a two-stage pyrolysis catalytic reactor using sepiolite as a catalyst. Sepiolite was characterized using nitrogen adsorption–desorption isotherms and Fourier-transform infrared spectroscopy. Results showed that the two-stage process increased the final yield of syngas product (43.89% against 39.52% for surgical masks and 50.53% against 39.41% for FFP2 masks). Furthermore, the composition of the biooils significantly changed, increasing the amount of 2,4-Dimethyl-1-heptene and other olefins, such as 3-Eicosene, (E)-, and 5-Eicosene, (E)-. Additionally, the methane and carbon dioxide content of the syngas product also increased in the two-stage experiments. Ultimately, the effect of sepiolite regeneration for its use in consecutive pyrolysis tests was examined. Characterization data showed that, the higher the use-regeneration of sepiolite, the higher the modification of textural properties, with mainly higher changes in its pore volume. The results indicated that the pyrolysis of face masks can be a good source of valuable products (especially from biooil and syngas products).

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Section: Characterization Of Liquid Fractionmentioning

confidence: 70%

Characterization of the Products of the Catalytic Pyrolysis of Discarded COVID-19 Masks over Sepiolite

Ortega

Martín-Lara

Pula³

et al. 2023

Applied Sciences

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“…1) Post-event maintenance and preventive maintenance. For the failure that does not cause excessive safety impact of the first level, and the way of post-maintenance is a more economical maintenance method, post-event maintenance is adopted, otherwise preventive maintenance is adopted [10].…”

Section: Maintenance Tasks and Maintenance Methodsmentioning

confidence: 99%

Optimizing maintenance strategies for reciprocating compressors using reliability-centered maintenance and on-line fault diagnosis system

Luo,

Lv,

Zheng

et al. 2024

Fourth International Conference on Mechanical Engineering, Intelligent Manufacturing, and Automation Technology (MEMAT 2023)

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Reciprocating compressors are important equipment for oil companies, which undertake the task of transporting BOG gas. With the use of China's reciprocating compressor online fault diagnosis system, the efficiency and economy of the maintenance and management of reciprocating compressor equipment can be further improved. RCM theory is a widely used theory in the international preventive maintenance decision-making, this paper introduces RCM theory into the maintenance decision of reciprocating compressor, combines the failure frequency, safety consequences, maintenance consequences and other factors, improves the content of FMECA analysis, and determines the risk of each equipment and failure of reciprocating compressor. Finally, combined with the fault diagnosis system installed by the enterprise, a new maintenance logic decision-making scheme and process are proposed.

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“…There are three stages used to solve the problem in this study, namely (1) providing data, (2) processing data, and (3) presenting the results of data analysis. Research data was obtained through literature study and first-level semiotic reading techniques, which are better known as heuristic reading, (Supriyanto, 2021). If the data collection in this study was carried out using a heuristic method, then the data analysis technique was carried out using a hermeneutic method.…”

Section: Methodsmentioning

confidence: 99%

The Cultural Identity of the Characters in the Film Scenario Ngeri-Ngeri Sedap by Bene Dion Rajagukguk

2023

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Clash and cultural identity fighting in film scenarios Ngeri-Ngeri Sedap karya Bene Dion Rajagukguk is a phenomenon of a very perfect cultural identity conflict. Cultural identity can affect social relations between characters. For this reason, it is very important to know the cultural identity of each character. Cultural identity can be known through semiotic studies. By knowing the language code, literary code, and cultural code we can find out the cultural identity of the character. This research uses Teeuw's semiotic theory. The data collection method used is the first level of semiotics reading. The results of this study are the language code used by the characters in the film scenario Ngeri-Ngeri Sedap karya Bene Dion Rajagukguk using Indonesian, but its use is mixed with the term Batak. The literary code is found from the facts of the story namely elements of characters and characterizations, plot, and background. Cultural code can be seen in cultural elements such as traditional ceremonies sulang-sulang pahoppu, tor-tor dance and ulos, Batak special songs, and special food mie gomak. From these codes can be seen the social relationships of the characters in accordance with the theory of social relations between individuals, and social relations between individuals and groups. This research is expected to be able to motivate the community to protect the culture they have but do not close themselves to the times. Keywords: identity; cultural; semiotic; scenario; figure

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Maintenance Performance Evaluation of an RCM Implementation: A Functional Oriented Case Study

Cited by 12 publications

References 26 publications

Characterization of the Products of the Catalytic Pyrolysis of Discarded COVID-19 Masks over Sepiolite

Characterization of the Products of the Catalytic Pyrolysis of Discarded COVID-19 Masks over Sepiolite

Optimizing maintenance strategies for reciprocating compressors using reliability-centered maintenance and on-line fault diagnosis system

The Cultural Identity of the Characters in the Film Scenario Ngeri-Ngeri Sedap by Bene Dion Rajagukguk

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