Energy Technologies and CO2 Management Symposium: Poster Session
Sponsored by: TMS Extraction and Processing Division, TMS: Energy Committee
Program Organizers: Xiaobo Chen, RMIT University; Yu Lin Zhong, Griffith University; Lei Zhang, University of Alaska Fairbanks; John Howarter, Purdue University; Alafara Baba, University of Ilorin; Neale Neelameggham, IND LLC; Cong Wang, Northeastern University; Ziqi Sun, Queensland University of Technology
Monday 5:30 PM
February 24, 2020
Room: Sails Pavilion
Location: San Diego Convention Ctr
E-46 (Invited): Return of Manmade CO2 to Earth: Neale Neelameggham1; Huimin Lu2; 1IND LLC; 2Beihang University
About 55% of the manmade CO2 emissions return back to earth. This trend has been seen during the past 6 decades since quantification of CO2 emissions have been routine. This is true in-spite of the total emissions have been increasing and that the amount returning back to earth is much more than what was emitted 60 years ago. The poster presents the science behind these return of manmade CO2 to earth and how this knowledge can be used in a gainful fashion.
E-47: Advanced Skutterudite-based Unicouples for A Proposed Enhanced Multi-mission Radioisotope Thermoelectric Generator: Brian Phan1; 1Jet Propulsion Laboratory
In order to enable explorations into deep space, spacecraft power systems must be carefully designed to be robust and sustainable over the lifetime of missions. Radioisotope Thermoelectric Generators (RTG’s) have been employed on several NASA missions; most recently, on Mars, Curiosity rover’s Multi-Mission Radioisotope Thermoelectric Generator (MMRTG) has provided the necessary power to deliver all of its groundbreaking discoveries. An effort began to produce an Enhanced Multi-Mission Radioisotope Thermoelectric Generator (eMMRTG) that would replace the MMRTG materials with skutterudite (SKD) based thermoelectric materials that are not only intrinsically more efficient than the MMRTG thermoelectric materials, but will allow for higher operating temperature. Approximately 25% more power at beginning of life and 50% more power at end of mission could be gained by eMMRTG compared to MMRTG. The progress on manufacturability and performance validation through life test data on the SKD unicouples that have been developed and tested will be discussed.
E-48: CaO Poisoning on Mn-Ce/AC Catalyst for Selective Catalytic Reduction of NO with NH3 at Low Temperature: Zenghui Su1; Shan Ren1; Jie Yang1; Tianshi Zhang1; Zelong Cai1; Lin Chen1; Ming Kong1; Qingcai Liu1; Jian Yang1; Jiangling Li1; 1ChongQing University
A series of Ca-doped Mn-Ce/AC catalyst were prepared by impregnation method and used for selective reduction(SCR) of NO with NH3 at the temperature range of 75-250 oC. SEM, BET, XRD, XPS NH3-TPD and FT-IR was carried out to study the deactivation reasons of CaO poisoned catalysts. Results showed that CaO resulted in a significant decrease of NO conversion efficiency. The doping of CaO resulted in a decrease in the specific surface area and total pore volume of the AC. The loading of CaO would cause a decrease in the concentration of Mn4+ on the surface of the catalyst and the redox capacity of the catalyst. The strong acid sites on the surface of the Ca-Mn-Ce/AC catalyst migrated to the high temperature zone, resulting in a decrease in the ammonia adsorption capacity of the catalyst. All of these would reduce denitrification activity of activated carbon catalysts.
E-49: Enabling Corrosion-resistant Magnesium Through Cross-linking Polymerized Inorganic Sol Coatings: Wei Wang1; Xiaona Yang1; Yong Fan1; Xiaobo Chen2; 1Jilin University; 2RMIT University
Magnesium (Mg) alloys, the lightest structural materials, suffer from poor corrosion resistance. Sol-gel coating is a common method to protect Mg alloys from corrosive attacks, however, the protective efficiency is compromised owing its inherent weakness. Herein, a SiO2@ZrO2 based sol coating with defect-free and high-stability characteristics was prepared through mimicking the epoxy-curing mechanism to address the corrosion issues of pure Mg. The occurrence of cross-linking process, analogues to a compact polymer, and incorporation of stable inorganic compounds, synergically enable the resulting sol coatings strong adhesion and superior protection to Mg in NaCl solution. Post-exposure observation manifests that surface morphology and topography of the coatings remain intact and no evident corrosion products over 672 h immersion. This work illustrates a simple and effective strategy for improving corrosion-resistance of Mg-based materials.
Cancelled
E-50: MnOx-decorated Fe-Zr Based Nano-catalysts for Low Temperature NH3-SCR: Improvement of Catalytic Activity: Chen Yang1; Jian Yang1; Qingrui Jiao1; Yuanmeng Tian1; Qingcai Liu1; Shan Ren1; Jiangling Li1; 1ChongQing University
MnOx modified Fe-Zr based nano-catalysts (donated as Mn(co)/Fe-Zr and Mn(im)/Fe-Zr) were synthesized with the co-precipitation impregnation method and impregnation method, respectively, and then were used for low-temperature selective catalytic reduction of NO with NH3 (SCR). Among these catalysts, the Mn(co)/Fe-Zr catalyst exhibits the highest NH3-SCR activity (94%) at 225°C when WHSV=300000 mL•g-1•h-1. Meanwhile, the properties of catalysts had been characterized by XRD、BET、XPS and H2-TPR. As determined by BET, the addition of MnOx increased the surface area and pore volume of the catalyst. The XRD results suggest that the Mn(co)/Fe-Zr possessed highly dispersed MnOx on the surface of the catalyst. The results of XPS revealed that the Mn(co)/Fe-Zr had highest concentrations of Mn4+ and Fe3+.
E-51: Modeling the Rate of Heat Loss from the Stack of a Natural Gas Pressure Reducing Station Heater: Amin Kazemi; Ali Kianifar1; 1Ferdowsi University of Mashhad
In Natural gas pressure reduction stations, gas with temperature 15 °C enters to station, as the gas pressure drops, temperature drops too, this can cause condensation or frosting gas compounds, resulting block in flow path. To avoid this phenomenon, station inlet should be pre-heated before going to regulators and pressure reduction process, using heaters installed in station; much of heat from burning gas is transferred to environment through body and specially stack. this article tries to calculate amount of wasted energy using experimental results of field research and data collection from a sample heater of gas pressure reducing station, by numerical modeling of the stack in Ansys software. modeling and analyzing the results determined daily 3.46Kwh energy as heat from body and 55.2Kwh energy output from stack to environment is wasted, considering the heater’s functions annually and many of these heaters in whole country, considerable energy source can be retrieved.