Imorb, Karittha

Preferred name

Imorb, Karittha

Alternative Name

Im-orb, Karittha

Im-Orb, Karittha

Im-orb, K.

Main Affiliation

School of Food Industry

karittha.im@kmitl.ac.th

Now showing 1 - 8 of 8

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Exergy and exergoeconomic analyses of sustainable furfural production via reactive distillation
(2021-07-01)
Wiranarongkorn, Kunlanan
;
Im-orb, Karittha
;
Panpranot, Joongjai
;
Maréchal, François
;
Arpornwichanop, Amornchai
Lignocellulosic biomass is a potential renewable resource for production of high-value, sustainable products. Furfural is among the important bio-based chemicals in biorefineries. However, the conventional process of furfural production using a reaction-separation network entails low product yield but high fixed and operating costs owing to the complex process of separation. In this study, a process of furfural production via reactive distillation (RD) was investigated and designed based on the concept of process intensification. Exergy and exergoeconomic analyses were applied to evaluate the process performance. When the RD column was operated at its optimal configuration, furfural production of 81.78 kg h−1 was achieved with xylose conversion and furfural yield of 97.9% and 97.4%, respectively. The exergy efficiency of furfural production was 56.41%, while the RD column exhibited the maximum exergy destruction rate among all components with an exergy efficiency of 69.82%. The exergy destruction rate declined with decrease in the reboiler duty of the RD column and increase in xylose concentration. The exergoeconomic analysis revealed that decreasing the reboiler duty had the highest impact on the total cost of furfural production. Decreases in feedstock and catalyst costs as well as interest rate additionally lowered the total cost rate of the system.
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Assessment and analysis of multi-biomass fuels for sustainable electricity generation
(2021-12-01)
Wiranarongkorn, Kunlanan
;
Phajam, Picharporn
;
Im-orb, Karittha
;
Saebea, Dang
;
Arpornwichanop, Amornchai
Many biomass power plants are not flexible, using only one fuel type, and have high CO<inf>2</inf> emissions. In this study, a new methodology to assess the multi-biomass utilization for a power plant is proposed. The results provide that the proportions of mixed biomass residues in different regions of Thailand are appropriate with lower chloride content and slagging inclination than the standard specification. However, high alkali metal oxides in biomass in the southern region lead to high fouling inclination with high fly ash deposition. The electricity production using multi-biomass fuel is more efficient with lower fuel consumption than that with single-type biomass. To generate 103.43 MW electricity production, 107.89 t h−1 consumption of mixed biomass fuels in the central is lower than that with multi-biomass in other regions. However, it generates a maximum of 12.5 mol% CO<inf>2</inf> in exhaust gases which can be captured by suitable amine-based absorbents with 90.82% efficiency.
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Process analysis of an integrated gasification and methanol synthesis process for bio-methanol production from untreated and torrefied biomass
(2021-01-01)
Im-Orb, Karittha
;
Arpornwichanop, Amornchai
The integrated biomass gasification and methanol synthesis process is investigated in this study. The different types of biomass i.e., the untreated and torrefied biomass at 250 oC (TB250) and torrefied biomass at 300 oC (TB300) are considered feedstock. The influence of torrefying temperature on the yield and composition of raw syngas derived gasifier is investigated. The biomass processed torrefaction leads to an increase in syngas and methanol yields. Moreover, the bio-methanol production process using torrefied biomass releases lower amount of CO2 than the raw one. An energy analysis is also performed using overall energy consumption and cold gas efficiency (CGE) of the integrated process as the indicators. The TB300 offers better performance in methanol production and CO2 emission. However, it requires high energy for methanol synthesis unit and offers low CGE.
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Process intensification approach for design and optimization of biodiesel production from palm fatty acid distillate
(2021-06-01)
Im-orb, Karittha
;
Arpornwichanop, Amornchai
;
Simasatitkul, Lida
Design of the biodiesel production from palm fatty acid distillate (PFAD) using process intensification approach is studied in technical, economic and environmental view points. Firstly, the transport phenomena analysis is performed to select the suitable intensified unit. The reactive distillation is selected and used in esterification – transesterification process and hydrolysis – esterification process. The optimum condition of reactive distillation in esterification – transesterification is achieved when the methanol is fed at the 3rd stage of the 4-stage column and the liquid holdup is maintained at 6 m3. The intensified esterification – transesterification process offers higher biodiesel yield and consumes less energy compared with the intensified hydrolysis – esterification process. The economic analysis shows that the intensified esterification-transesterification process is found to be economically feasible. Finally, environment assessment based on life cycle analysis (LCA) indicates that the environmental impact of both processes are similar.
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Comparative techno-economic assessment of bio-methanol and bio-DME production from oil palm residue
(2022-04-15)
Im-orb, Karittha
;
Arpornwichanop, Amornchai
The techno-economic assessment was performed to investigate and compare the production of bio-methanol and bio-dimethyl ether (bio-DME) via the combined gasification and chemical synthesis processes (i.e., gasification-methanol (MeOH) and gasification-DME). The combined processes were simulated using oxygen as a gasifying agent and the oil palm trunk, the agricultural waste generated from the palm oil industry, as feedstock. The gasification-MeOH process offered a higher amount of valuable product (methanol) and released a larger amount of CO<inf>2</inf>. The energy analysis indicated the two biomass conversion processes were exothermic process. The gasification-DME process presented a higher biomass conversion efficiency of 59.5% compared to 47.6% of the gasification-MeOH. The pinch analysis of gasification-MeOH and the gasification-DME processes indicated threshold pinch that required only cold utility of 0.5542 kW and 0.7258 kW, respectively. Regarding the economic aspect, the two processes were still not economically feasible, and the methanol and DME prices and the project lifetime influenced their economic performance. However, due to the high product price, the gasification-DME process was approximately 7% more economically feasible than the gasification-MeOH process.
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Energy analysis and life cycle assessment of furfural and 5-hydroxymethylfurfural integrated biorefinery processes with heat pump-assisted reactive distillation
(2025-03-15)
Wiranarongkorn, Kunlanan
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Im-Orb, Karittha
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Saebea, Dang
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Patcharavorachot, Yaneeporn
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Arpornwichanop, Amornchai
Bio-based products, such as biochemicals and bioenergy, have received considerable attention in efforts to mitigate the effects of climate change. In this study, an integrated biorefinery process for the production of furfural and 5-hydroxymethylfurfural (HMF) using sugarcane bagasse is proposed. Three process scenarios were compared: the integrated process of HMF and furfural production using (i) conventional reactive distillation (RD), (2) heat pump-assisted RD, and (3) heat pump-assisted RD with heat integration. The comparison focused on energy efficiency and life cycle analysis. The simulation results revealed that the overall energy efficiency of the proposed process could increase by 14.5 % with the additional heat pump to the RD column at a pressure ratio of 1.4 due to a reduction of external energy consumption. This improvement reduced the environmental impact of natural gas combustion for utility production. Specifically, the global warming potential of processes involving heat pump-assisted RD without and with heat integration decreased by 16.66 % and 80.08 %, respectively, compared to conventional RD. These results indicate that incorporating heat pump-assisted RD and implementing effective heat management within the integrated biorefinery process significantly decreased external energy consumption, leading to substantial environmental benefits.
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Sustainable Production of Biomethanol and Its Environmental Impacts
(2025-01-01)
Detchusananard, Thanaphorn
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Im-Orb, Karittha
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Wiranarongkorn, Kunlanan
;
Chen, Yong Song
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Arpornwichanop, Amornchai
Utilizing biomass and biogas sourced from various organic waste materials as renewable feedstocks for biomethanol production offers a sustainable alternative to fossil fuels such as coal, petroleum oil, and natural gas. This chapter provides an exploration of several technologies employed in biomethanol production, including biomass gasification, biomass pyrolysis, and biogas upgrading. Syngas production and conditioning, methanol synthesis and separation, and integrating systems with other renewable energy sources are found to be crucial stages towards achieving sustainable production. The chapter comprehensively evaluates the technical, economic, and environmental aspects of each biomethanol production process. Furthermore, it delves into ongoing efforts to improve and develop biomethanol-production processes to achieve the carbon neutrality goals. The chapter also outlines emerging trends and future research directions in the field of biomethanol production.
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Production of bio-dimethyl ether from oil palm residue via integrated gasification and direct DME synthesis process
(2023-09-12)
Im-Orb, Karittha
;
Arpornwichanop, Amornchai
The production of bio-dimethyl ether via an integration of biomass gasification and direct DME synthesis (IBG-DME) was studied. The oil palm residue was a considered feedstock. The parametric analysis was done to examine the impact of gasifying temperature on the product composition, energy demand of each unit and overall process using the developed Aspen plus model. The high gasifying temperature offered high production rate of valuable products (bio-DME and bio-methanol), and low CO2 emission. The IBG-DME process could operate at thermal self-sufficient condition when gasifying temperature was maintained at 882 °C. The maximum yield of bio-DME of 0.3472 kg.h-1 could be achieved at gasifying temperature of 950 °C. At this condition, the CO2 emission, overall energy consumption and energy efficiency were 0.7457 kg.h-1, 0.00776 kW and 59.76 %, respectively.

Imorb, Karittha

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