Imorb, Karittha

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Performance Analysis of Integral Process of Bio-Oil Production, Bio-Oil Upgrading, and Hydrogen Production from Sewage Sludge
(2023-09-14)
Simasatitkul, Lida
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Lakkhanasombut, Apiwat
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Morin, Worawit
;
Jedsadajerm, Supachai
;
Amornraksa, Suksun
This research investigated the production of bio-oil through the hydrothermal liquefaction (HTL) process using sewage sludge from wastewater, along with the hydrotreating of the bio-oil. The simulation process began with a wastewater flow rate of 460 tonnes/day, where the feedstock was divided into two streams. The first stream underwent the HTL process, while the other was directed towards hydrogen production. The resulting products included gaseous products, crude bio-oil, and heavy liquid. The crude bio-oil was further upgraded by introducing hydrogen, which was obtained through gasification and purified by gas separation using a palladium membrane. The primary product mainly comprised alkane, with a carbon content of 85.89% and hydrogen content of 14.11%. For the purification of gasoline, kerosene, diesel, and fuel oil, a fractionation distillation tower arrangement was designed. In addition, Additionally, the gaseous products underwent fractionation distillation to obtain 98% nitrogen and 99.9% liquid carbon dioxide. Considering the carbon footprint, it was observed that the bio-oil production process resulted in the highest greenhouse gas (GHG) emissions.
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Effect of tray drying temperature and drying time on properties of cricket powder
(2025-01-23)
Simasatitkul, Lida
;
Thongprom, Kittisak
;
Jaroensang, Thunyapisit
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Im-Orb, Karittha
This research studied the production of cricket powder via tray drying and powdering processes by investigating the effect of drying temperature of 80, 90, 100oC and drying time ranging of 30 - 240 min on the properties of cricket powder. The drying rate increased while the moisture content decreased as drying temperature and drying time increased causing it easy to be ground and had good solubility. The cricket powder had dark brown color and its lightness decreased with increasing drying temperature. The produced cricket powder could reach equilibrium moisture content of approximately 5% and the water activity was decreased with increasing drying temperature. Regarding the nutrient content, the change in drying temperature in a range of 80-100oC had no significant effect on the nutrient content. The suitable drying condition of crickets offering the highest protein content of 70.35% was achieved at drying temperature of 80oC and drying time of 240 min. At this condition, 55.57% yield of cricket powder satisfying dry food specification (moisture content of 5.32% and aw of 0.3539) was obtained.
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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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