แจ้งเอกสารไม่ครบถ้วน, ไม่ตรงกับชื่อเรื่อง หรือมีข้อผิดพลาดเกี่ยวกับเอกสาร ติดต่อที่นี่ ==>
หากไม่มีอีเมลผู้รับให้กรอก thailis-noc@uni.net.th
หากไม่มีอีเมลผู้รับให้กรอก thailis-noc@uni.net.th
Anusorn Boonpoke. Development of Biomass-Based Adsorbents for Carbon Dioxide Capture Technology. Doctoral Degree(Food Engineering). King Mongkut's University of Technology Thonburi. KMUTT Library.. : King Mongkut's University of Technology Thonburi, 2009.
Development of Biomass-Based Adsorbents for Carbon Dioxide Capture Technology
Name: Anusorn Boonpoke
keyword:
Carbon dioxide
Abstract:
Agricultural residues were used as precursors for synthesizing activated carbon and
MCM-41 and used as absorbents. Bagasse and rice husk were activated by ZnCh with
weight ratio of 1:1 and calcined at 500 C for I h (BAC and RAC, respectively). Rice husk
was used as silica source for MCM-41 synthesis. The extraction was carried out by
refluxing with 5M of hydrochloric acid at 80 C and then calcined at 650 C for 4 h.
R-MCM-4l was then synthesized hexadecyltrimethylammoiurn bromide (CTAB) as a
template. The molar composition ratio was 1.0SiOz: 1.INaOH: 0.13CTAB: 0.12HzO. The
mesoporous structure was completely crystallized within 48 h aging at pH 10 and then
calcined at 550 C for 5 h. Na adsorption isotherm of synthesized activated carbons and
R-MCM-41 exhibited type I and type IV adsorption isotherm according to IUPAC
classification, respectively. Surface area of HAC, RAC, and R-MCM-41 was 923.39,
926.53, and 602.00, respectively. The porosity of HAC and RAC was 99.19 and 926.53%,
respectively. Proximate analysis indicated that HAC and RAC contain high fixed carbon
content of 84.5 and 62.8 MOJO, respectively. Thermal weight loss analysis indicated that the
biomass-based adsorbents was suitable to use at high adsorption temperature due to very
small weight loss was found. Surface function group modification of parent adsorbents
was performed using amines impregnation method. With the increase in amine loading, the
surface area, pore volume of the loaded amine activated carbon and R-MCM-41 adsorbent
decreased.
Carbon dioxide adsorption experiment was performed using thermal gravimetric
analyzer (TGA) and tubular reactor connected to mass spectrometer (MS). The adsorption
temperature was varied over 30-100 ?C. TGA adsorption (gravimetric measurement) was
conducted to investigate the adsorption characteristics of parent materials using COz
concentration of 99.9 %v/v. At 30 C HAC, RAC, R-MCM-41 provided the highest
adsorption capacity of 76.89, 57.13, and 23.32 mg-Cfri/g-adsorbent, respectively.
Physisorption was the major adsorption mechanism. The results by using tubular reactor
with MS suggested that amine impregnated materials enhanced the adsorption capacity at a
relatively high adsorption temperature. Polyethylenimine (PEl) impregnated BAC and
R-MCM-41 at 5 and 25 wfllo exhibited higher capacity than the parent BAC and R-MCM-
41 at temperature higher than 30?C. The maximum capacity was obtained with the highest
initial C02 concentration gas stream at 30 C; 1.541, 1.118, 0.782 and 0.766 mol/kg for
BAC, BAC-PEI5, BAC-PEI 25 and BAC-PEI50, respectively. At amine loading rate of 50
wt%, the maximum capacity of 0.274,0.331 and 0.172 mol/kg of BAC-PEI 50, BAC-ANL
50 and BAC-MEA50, respectively. PEl modified R-MCM-41 provided the highest
adsorption capacity compared to other amines (Monoethanolamine, Aniline, and (3-
Aminopropyl) trimethoxysilane). The maximum capacity of PEl modified R-MCM-41 was
found at 75?C of 0.929, 0.782 and 0.459 mol/kg for R-MCM-41-PEI 50, R-MCM-41-PEI
25 and R-MCM-PEI 5, respectively. Chemisorption process likely contributes to the C02
adsorption. Moreover, the capacity was increased with increasing initial CO2
concentration.
R-MCM-41 was.also utilized as a supporter of Ni catalyst using wet impregnation
method for CO2 dry reforming of CH4. Sample with loading ratio of Si/Ni = 2.5 and 5
showed high CO2 and CH4 conversions. However, deactivation due to carbon formation
was occurred during long time stability test at 750 C. The research suggested that rice
husk have the potential to be used as raw material of catalyst supporter for dry reforming
reactions.
King Mongkut's University of Technology Thonburi. KMUTT Library.
Address:
BANGKOK
Email:
info.lib@mail.kmutt.ac.th
Name: Amnat Chidthaisong
Role:
Supervisor
Created:
2009
Modified:
2011-01-30
Issued:
2011-01-24
วิทยานิพนธ์/Thesis
application/pdf
CallNumber:
JGSEE230
eng
DegreeName: Doctor of Philosophy
Level: Doctoral Degree
Descipline: Food Engineering
©copyrights King Mongkut's University of Technology Thonburi
RightsAccess:
ใช้เวลา
0.019037 วินาที
Anusorn Boonpoke
| Title | Contributor | Type |
|---|---|---|
| Development of Biomass-Based Adsorbents for Carbon Dioxide Capture Technology
มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี Anusorn Boonpoke | Amnat Chidthaisong | วิทยานิพนธ์/Thesis |
| Synthesis of activated carbon and MCM-41 from bagasse and rice husk and their carbon dioxide adsorption capacity
มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี Anusorn Boonpoke;Siriluk Chiarakorn;Navadol Laosiripojana;Sirintornthep Towprayoon;Amnat Chidthaisong | บทความ/Article |
Amnat Chidthaisong