Fabrication of La0.8Sr0.2CrO3-based perovskite film via flame-assisted vapor fdeposition for H2 production by reforming

บทความในวารสาร

ผู้เขียน/บรรณาธิการ

กลุ่มสาขาการวิจัยเชิงกลยุทธ์

ไม่พบข้อมูลที่เกี่ยวข้อง

รายละเอียดสำหรับงานพิมพ์

รายชื่อผู้แต่ง: Sansernnivet M., Laosiripojana N., Assabumrungrat S., Charojrochkul S.

ปีที่เผยแพร่ (ค.ศ.): 2010

Volume number: 16

Issue number: #

หน้าแรก: 311

หน้าสุดท้าย: 321

จำนวนหน้า: 11

นอก: 0948-1907

eISSN: 0948-1907

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-78650778943&doi=10.1002%2fcvde.201006857&partnerID=40&md5=b089a605cecc26ed9034672d62ec35a2

ภาษา: English-Great Britain (EN-GB)

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บทคัดย่อ

Flame-assisted vapor deposition (FAVD) has a principle similar to conventional CVD in which a film is deposited from a vapor phase. It is a simple and cost-effective technique as it is operated in an open atmosphere. The microstructure of the deposited films is controlled by varying the processing parameters. In our research, an oxide film of lanthanum chromite perovskite-based (La0.8Sr0.2CrO3) material is fabricated, using the FAVD technique, on a stainless steel substrate (SS430) for an application in solid oxide fuel cells (SOFC). The precursor solution for La0.8Sr0.2CrO3 film is prepared from metal nitrate compounds with a concentration in the range 0.0125โ-โ0. 0500โM. Dense and porous films are fabricated, depending on various processing parameters such as fuel to water ratio, air pressure, flow rate of a precursor, and the distance between the spray nozzle and the substrate. The effect of various processing parameters on the microstructure and phase formation of the deposited film are investigated using scanning electron microscopy (SEM) and X-ray diffraction (XRD). The deposition temperature resulting from the total heat of combustion from the combination of all the deposition parameters is very important in determining the properties of the films. According to the SEM images, a small particle size on the nanometer scale is found at high deposition temperature. On the other hand, the particles are connected into a dense film at low deposition temperatures. The main phase of LaCrO3 is found in all deposition temperatures (temp range). For hydrogen production, the methane steam reforming over the porous film of La 0.8Sr0.2CrO3 at 900โฐC is investigated. Under specific operating conditions (low inlet H 2O/CH4 ratio), its catalytic reactivity is comparable to metallic-based catalysts but with less inlet steam required. Dense and porous La0.8Sr0.2CrO3 films for use in Solid Oxide Fuel Cells are fabricated on stainless steel using a flame-assisted CVD route, starting from a solution of the corresponding metal nitrates. The interrelations between the processing parameters and the film morphology and microstructure are investigated by SEM and XRD. The functional properties of the obtained systems in H2 production by methane steam reforming are also presented and discussed. Copyright ฉ 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

คำสำคัญ

FAVD, Lanthanum chromite (La0.8Sr0.2CrO3), Perovskite, Solid oxide fuel cells