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 - 10 of 12

Some of the metrics are blocked by your
consent settings
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.
Some of the metrics are blocked by your
consent settings
A Review on the Technical and Economic Prospects of Biofuel Production from Integrated Biomass Gasification and Fischer-Tropsch Processes
(2020-01-01)
Im-orb, Karittha
;
Arpornwichanop, Amornchai
Concerns in energy shortage and the impact of greenhouse gas emissions motivate the production of transportation fuel via a combined biomass gasification (BG) and Fischer-Tropsch (FT) process. This review explains the basic background of the BG-FT process, including the gasification, gas cleaning, and FT processes. Numerous aspects of this process, such as the influence of the feedstock type and characteristics and the processing conditions, efficient process design, and FT-catalyst performance improvement, are reviewed based on laboratory-scale research reported in the literature. The tar removal process used to produce the synthesis gas satisfying the FT specification is also focused in this review. Moreover, the technical and economic prospects of the current BG-FT process to produce transportation fuels are reviewed and compared. Finally, trends in the future research of the BG-FT process are examined.
Some of the metrics are blocked by your
consent settings
Process and sustainability analyses of the integrated biomass pyrolysis, gasification, and methanol synthesis process for methanol production
(2020-02-15)
Im-orb, Karittha
;
Arpornwichanop, Amornchai
Technical and sustainability analyses of the methanol production via the integrated biomass pyrolysis, gasification, and methanol synthesis (IBPGM) process using rice straw as feedstock, are performed. The utilization of emitted CO<inf>2</inf> by recycling to a gasifier as a gasifying agent is investigated for technical and environmental reasons. The effects of CO<inf>2</inf> recirculation on the product distribution and energy consumption of the IBPGM process are examined. The production rate of methanol is improved with the increased CO<inf>2</inf> recycle fraction, while that of bio-oil does not change. The IBPGM is a highly exothermic process, with the largest energy-releasing unit being the methanol reactor. The energy consumption at the gasifier exhibits the same trend and thermal self-sufficiency is consequently achieved when the recycle fraction is raised to 0.76. Environmental assessment using a life cycle analysis tool reveals that the energy management of methanol synthesis unit and syngas processor needs to be improved as they highly contribute toward the carbon footprint and potential environmental impact. The technical and environmental factors of the IBPGM process are evaluated by the analysis hierarchy process, calculated by a multi-criteria decision analysis method. The IBPGM process with the CO<inf>2</inf> recycle fraction of 0.2 offers the best performance. Under this condition, the methanol and bio-oil production rates of 0.23 and 0.09 kmol h−1, respectively, and the energy efficiency of 60.7% can be achieved, based on the biomass feed rate of 1 kmol h−1.
Some of the metrics are blocked by your
consent settings
Bio-methanol production from oil palm residues: A thermodynamic analysis
(2020-12-15)
Im-orb, Karittha
;
Phan, Anh N.
;
Arpornwichanop, Amornchai
The thermodynamic analysis of bio-methanol production from oil palm residues was performed using a process model developed in Aspen Plus. Among the different types of oil palm residues, i.e., trunk, frond, and empty fruit bunch, the trunk residue offers the highest synthesis gas (syngas) (H<inf>2</inf> and CO) yields via the gasification process; therefore, it was selected as the biomass model compound. The effect of gasification operating conditions on the syngas composition, yield, bio-methanol production, energy consumption, and exergy performance was examined. The yield of syngas increased with increasing gasifying temperature, whereas that of bio-methanol exhibited the opposite trend due to the decrease in H<inf>2</inf> concentration of the syngas. The gasifier was an important unit for enhancing the exergy efficiency of the system, which was decreased when the equivalent ratio (ER) and gasifying temperature increased. Recirculating pressure swing adsorption offgas to the gasifier did not benefit bio-methanol production, nor did it improve energy and exergy performance. The maximum yield of bio-methanol was achieved by a once-through process that maintained the gasifying temperature at 750 °C and ER at 0.25. Under these conditions, the maximum energy and exergy efficiencies were 38.57 and 25.44%, respectively.
Some of the metrics are blocked by your
consent settings
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.
Some of the metrics are blocked by your
consent settings
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.
Some of the metrics are blocked by your
consent settings
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.
Some of the metrics are blocked by your
consent settings
Analysis of the sorption-enhanced chemical looping biomass gasification process: Performance assessment and optimization through design of experiment approach
(2020-09-15)
Detchusananard, Thanaphorn
;
Im-orb, Karittha
;
Maréchal, François
;
Arpornwichanop, Amornchai
In this study, the performance of high-purity hydrogen production through the sorption-enhanced chemical looping gasification (SECLG) process, involving a gasifier, calciner, and air reactor, was investigated. In this process, the biomass feedstock was wood residue, and steam, calcium oxide (CaO), and nickel oxide (NiO) were used as a gasifying agent, CO<inf>2</inf> sorbent, and oxygen carrier, respectively. First, the influences of key operational parameters (i.e., steam to carbon (S/C) molar ratio, gasifying temperature, and NiO to carbon (NiO/C) molar ratio) on product gas yields and net energy consumption of the process were studied. According to the first and second laws of thermodynamics, performance indicators of the SECLG process demonstrated that increases in energy and exergy efficiencies occurred with increases in S/C molar ratio and/or gasifying temperature. Then, mathematical models indicative of correlations between energy efficiency, exergy efficiency, and major operating parameters (e.g., S/C molar ratio and gasifying temperature) were developed through the design of experiment (DOE) method and used for process optimization. The optimal conditions offering maximum energy (70%) and exergy (56%) efficiencies were a S/C molar ratio of 4.5 and gasifying temperature of 700 °C, under which all reactors operated at thermal self-sufficient conditions.
Some of the metrics are blocked by your
consent settings
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.
Some of the metrics are blocked by your
consent settings
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
;
Im-Orb, Karittha
;
Saebea, Dang
;
Patcharavorachot, Yaneeporn
;
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.

Imorb, Karittha

Filters

Settings

Sort By

Results per page