Thaioil Public Company Ltd

Chon Buri, Thailand

Thaioil Public Company Ltd

Chon Buri, Thailand

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Patent
THAI OIL PUBLIC COMPANY Ltd | Date: 2016-12-01

Present example embodiments relate generally to methods, systems, devices, computer readable medium, and logic for managing a plurality of alarms initiated by a plurality of alarm sensors. The method comprises receiving the plurality of initiated alarm. The method further comprises prioritizing the initiated alarms. The method further comprises creating an initiated alarm being a condition-based alarm when an initiated alarm satisfies an event condition. The method further comprises reprioritizing an initiated alarm when said initiated alarm satisfies a reprioritization condition. The method further comprises suppressing an initiated alarm. The method further comprises reporting an unsuppressed initiated alarm based on the prioritizing of said alarm. The method further comprises providing information comprising an operator action for the unsuppressed initiated alarm and an initiated alarm suppressed based on the unsuppressed initiated alarm.


Saewong S.,Chulalongkorn University | Wungtanagorn C.,Thaioil Public Company Ltd | Jitkarnka S.,Chulalongkorn University
AIChE 2012 - 2012 AIChE Annual Meeting, Conference Proceedings | Year: 2012

Aromatics are not only produced from conventional petroleum-based feedstocks, but they can be also converted from bioethanol via the catalytic dehydration, which is an alternative process that has gained high attention from petrochemical industries. Modified HZSM-5 catalysts were proven to be effective catalysts for the direct conversion of ethanol to aromatics. Since ethylene is an intermediate for aromatic formation via ethanol dehydration, the aromatic production was expected to be improved by using a dual-bed catalytic system, which ethylene is produced in the first bed and aromatics are formed from ethylene aromatization in the second consecutive bed. The objective of this work was to compare the activity of single-bed catalytic systems (using Ga2O3/HZSM-5 or ZnO/HZSM-5) with that of dual-bed systems (using MgHPO4/Al2O3 as the ethylene-producing catalyst coupled with one of the modified HZSM-5 as aromatization catalysts). The HZSM-5 and Ga2O3- and ZnO-doped HZSM-5 were individually tested in the single-bed system for their activity on aromatic production under the temperature of 500°C. For the dual-bed systems, the first catalytic bed contained 0.5 wt% MgHPO4/Al2O3, which was fixed for all experiments, whereas the second bed contained either Ga2O3/HZSM-5 or ZnO/HZSM-5. The temperatures of the 1st and 2nd beds were separately controlled at 370°C and 500°C, respectively. The results revealed that the ethanol conversion range of 83-85% was observed from all cases for both systems. The aromatic yields gained from the single-bed systems were found increasing in the order: HZSM-5 (9.1 %) < ZnO/HZSM-5 (12.7%) < Ga2O3/HZSM-5 (16.8%). Using the dual-bed systems, the aromatic yield was increased by 70.3% and 31.5% with using the HZSM-5 and Ga2O3/HZSM-5 as the second-bed catalysts, respectively. In contrast, the aromatic yield obtained from using ZnO/HZSM-5 in the second bed was slightly decreased by 3.1 %. In conclusion, the aromatic yield can be significantly enhanced by using the dual-bed system of MgHPO4/Al2O3 coupled with a catalyst that has high ethylene aromatization activity.


Intanoo P.,Chulalongkorn University | Rangsunvigit P.,Chulalongkorn University | Namprohm W.,Thaioil Public Company Ltd | Thamprajamchit B.,Thaioil Public Company Ltd | And 2 more authors.
International Journal of Hydrogen Energy | Year: 2012

The objective of this study was to investigate hydrogen production from alcohol wastewater using an anaerobic sequencing batch reactor (ASBR) under thermophilic operation and at a constant pH of 5.5. Under the optimum COD loading rate of 68 kg/m3d, the produced gas contained 43% H 2 without methane and the system provided a hydrogen yield and specific hydrogen production rate of 130 ml H2/g COD removed and 2100 ml H2/l d, respectively, which were much higher than those obtained under the mesophilic operation. Under thermophilic operation, both nitrogen and phosphate uptakes were minimal at the optimum COD loading rate for hydrogen production and most nitrogen uptake was derived from organic nitrogen. Under the thermophilic operation for hydrogen production, the nutrient requirement in terms of COD:N:P was found to be 100:6:0.5, which was much higher than that for the methenogenic step for methane production under both thermophilic and mesophilic operations and for the acidogenic step for hydrogen production under mesophilic operation. © 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights.


Taechapoempol K.,Chulalongkorn University | Sreethawong T.,Chulalongkorn University | Rangsunvigit P.,Chulalongkorn University | Namprohm W.,Thaioil Public Company Ltd | And 3 more authors.
Applied Biochemistry and Biotechnology | Year: 2011

The three highest hydrolysis-capacity-value isolates of Bacillus subtilis (A 002, M 015, and F 018) obtained from Thai higher termites, Microcerotermes sp., under different isolation conditions (aerobic, anaerobic, and anaerobic/aerobic) were tested for cellulase activities-FPase, endoglucanase, and β-glucosidase-at 37 °C and pH 7.2 for 24 h. Their tolerance to an ionic liquid, 1-butyl-3-methylimidazolium chloride ([BMIM]Cl), was also investigated. The results showed that the isolate M 015 provided the highest endoglucanase activity whereas the highest FPase and β-glucosidase activities were observed for the isolate F 018. The isolate F 018 also showed the highest tolerance to [BMIM]Cl in the range of 0.1-1.0 vol.%. In contrast, the isolate A 002 exhibited growth retardation in the presence of 0.5-1.0 vol.% [BMIM]Cl. © Springer Science+Business Media, LLC 2010.


Chaitanarit A.,Petroleum and Petrochemical College | Wungtanagorn C.,Thaioil Public Company Ltd | Jitkarnka S.,Petroleum and Petrochemical College
AIChE 2012 - 2012 AIChE Annual Meeting, Conference Proceedings | Year: 2012

In recent years, with the global warming problem and the energy crisis, the production of chemicals from renewable resources has been paid more attention. Light olefins (ethylene and propylene); one of the important chemicals, can be produced from renewable resources as well. Recently, there are few reports on the production of ethylene from bio-ethanol; that is a renewable resource, using a silicoaluminophosphate zeolite (SAPO-34) catalyst through the catalytic dehydration process. The suitable temperature for the highest production of ethylene is 350°C, after which it decrease. However, the selectivity to propylene at high reaction temperatures and low space velocity had not yet been investigated. In this work, the objective was to study the effect of using SAPO-34 in the catalytic conversion of bio-ethanol to light olefins at various operating conditions aiming to find the optimal condition for the high propylene production. The reaction temperature and liquid hourly space velocity (LHSV) were varied in the range of 350°C to 500°C and 0.2 h-1 to 1.0 h-1, respectively. As a result, the reaction temperature and LHSV had the influences on catalytic activity. Low temperature or high LHSV are highly effective for the production of ethylene whereas high temperature or low LHSV are highly effective for the production of C4+ products. The reaction temperature of 400°C and the LHSV of 0.5 h-1 were found to be the suitable conditions for a high production of propylene with 92.5% ethanol conversion and 12.6% propylene selectivity. The reaction temperature and the LHSV also affected to the coke formation on the catalyst. The amount of coke increased with the increase of reaction temperature and the decrease of LHSV.


Patent
THAI OIL PUBLIC COMPANY Ltd | Date: 2013-02-21

Present example embodiments relate generally to methods, systems, computing devices, and logic for managing a plurality of alarms initiated by a plurality of alarm sensors. The method comprises the steps of: receiving the plurality of initiated alarm, prioritizing the initiated alarms, creating an initiated alarm being a condition-based alarm when an initiated alarm satisfies an event condition, reprioritizing an initiated alarm when said initiated alarm satisfies a reprioritization condition, suppressing an initiated alarm, reporting an unsuppressed initiated alarm based on the prioritizing of said alarm, and providing information comprising an operator action for the unsuppressed initiated alarm and an initiated alarm suppressed based on the unsuppressed initiated alarm.

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