สืบค้นงานวิจัย
Reactivity of Au/La1-xSrxCr1-yNiyO3-8 Catalyst toward Oxidative Coupling of Methane for Light Hydrocarbon Production
Hatairat Worraphon - ไม่ระบุหน่วยงาน
ชื่อเรื่อง (EN): Reactivity of Au/La1-xSrxCr1-yNiyO3-8 Catalyst toward Oxidative Coupling of Methane for Light Hydrocarbon Production
ผู้แต่ง / หัวหน้าโครงการ (EN): Hatairat Worraphon
บทคัดย่อ (EN): Lanthanum chromite (LaCrO3) based perovskite material is interesting for high temperature electrochemical and catalytic applications. Nevertheless, pure LaCrO3 has major limitations in term of the sinterability, the electrical conductivity, and surface area. The properties of LaCrO3 could be improved by the substitution of a lower-valent ion at A and/or B site. Therefore, strontium (Sr) and nickel (Ni) were selected as substitution elements at A and B sites of LaCrO3 for improving the physical properties. In the present work, La0.8Sr0.2Cr0.9Ni0.1O3 (LSCN) was synthesized by the coprecipitation technique and calcined in either air or hydrogen atmosphere (LSCN-air, LSCN-H2) for comparison. Then, gold was deposited on synthesized perovskite by a deposition-precipitation technique integrated with ultrasound in order to improve the catalytic activity toward the oxidative coupling of methane (OCM) reaction. Prior to the reaction testing, the prepared samples were characterized by various techniques (i.e., BET, SEM-EDS, TEM, XRD and XRF). It was found that both perovskite materials calcined in air and hydrogen were crystalline as La0.8Sr0.2Cr0.905Ni0.095O3 (JCPDS #01-076-2809), which is orthorhombic structure. Importantly, the perovskite calcined in hydrogen enhanced higher surface area and porosity than those calcined in air. Regarding the gold-doped samples, the particle size of Au supported on La0.8Sr0.2Cr0.9Ni0.1O3 calcined in hydrogen (Au/LSCN-H2) was relatively smaller than Au supported on La0.8Sr0.2Cr0.9Ni0.1O3 calcined in air (Au/LSCN-air). In order to study the potential use of LSCN and Au/LSCN materials as catalyst, the OCM reaction was selected since it is an important reaction for converting low-cost methane to valuable C2 and C3 hydrocarbons (ethylene, ethane, propane and propylene). The optimum OCM conditions were studied under various conditions. It was found that LSCN-H2 provides better activity than LSCN-air. This result corresponded to the characteristics of prepared perovskite. In addition, the doping of Au (as Au/LSCN-H2) improved the catalyst stability toward OCM reaction by increasing the resistance of carbon formation on catalyst surface during the reaction. From this study, it is summarized that the suitable conditions for Au/LSCN-H2 were operated under reducing atmosphere during heating up process, aging for 13 hours before reaction test, at 900 ํC. Regarding the effect of reactants ratio, the CH4:O2 ratio of 2:1 shows the best catalytic performance in term of light hydrocarbon production yield. As for the effect of CO2 addition with CH4 and O2, it was found that the presence of CO2 strongly increases the amount of C3H8 in product. Nevertheless, it should also be noted that several by-products (i.e., H2, CO2 and CO) were always formed along with C2 and C3 hydrocarbons under all OCM conditions.
บทคัดย่อ: ไม่พบข้อมูลจากหน่วยงานต้นทาง
ภาษา (EN): en
เอกสารแนบ (EN): http://dcms.thailis.or.th/dcms/dccheck.php?Int_code=54&RecId=13386&obj_id=37839
เผยแพร่โดย (EN): มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี
คำสำคัญ (EN): Lal-xSrxCrl-yNiyO3-8 perovskite
เจ้าของลิขสิทธิ์ (EN): มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี
หากไม่พบเอกสารฉบับเต็ม (Full Text) โปรดติดต่อหน่วยงานเจ้าของข้อมูล

การอ้างอิง

Hatairat Worraphon. "Reactivity of Au/La1-xSrxCr1-yNiyO3-8 Catalyst toward Oxidative Coupling of Methane for Light Hydrocarbon Production". ไม่ระบุหน่วยงาน. ม.ป.ป.

Hatairat Worraphon. "Reactivity of Au/La1-xSrxCr1-yNiyO3-8 Catalyst toward Oxidative Coupling of Methane for Light Hydrocarbon Production". ไม่ระบุหน่วยงาน. ม.ป.ป.. Print.



TARR Wordcloud:
Reactivity of Au/La1-xSrxCr1-yNiyO3-8 Catalyst toward Oxidative Coupling of Methane for Light Hydrocarbon Production
Hatairat Worraphon
มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี
ไม่ระบุวันที่เผยแพร่
Life Cycle Greenhouse Gas Emission from Biodiesel Production including land-use change aspects Biological Ethanol Production from Glycerol Effect of Mycobacterium Tuberculosis on the production of interleukin 2 Environmental Assessment of Electricity Production in Tanzania Carbon Sequestration in Charcoal Production for Mangrove Plantation Measurement of eco-efficiency for pulp and paper production in Myanmar Chicken Slaughterhouse Lipid Waste Management and Potential for Biohydrogen Production Bio-oil Production from Various Biomass Feedstocks by Vacuum Pyrolysis Examination of Suitable Torrefaction Conditions for Bio-oils Production from Selected Biomass Optimization of Recombinant Hemagglutinin Protein Production from Baculovirus Expression Vector System
คัดลอก URL
กระทู้ของฉัน
ผลการสืบค้นทั้งหมด โพสต์     เรียงลำดับจาก
พัฒนาระบบโดยศูนย์ความรู้เฉพาะด้านวิศวกรรมความรู้และวิศวกรรมภาษาDeveloped by Center of Excellence for Unified Knowledge and Language Engineering
สนับสนุนโดยสำนักงานพัฒนาการวิจัยการเกษตร (องค์การมหาชน)Supported by the Agricultural Research Development Agency (Public Organization)
แบบสำรวจความพึงพอใจQuestionair