Iodine Confinement into Metal–Organic Frameworks (MOFs): Low-Temperature Sintering Glasses To Form Novel Glass Composite Material (GCM) Alternative Waste Forms

2011 ◽  
Vol 51 (2) ◽  
pp. 614-620 ◽  
Author(s):  
Dorina F. Sava ◽  
Terry J. Garino ◽  
Tina M. Nenoff
Keyword(s):  
Composite Material ◽  
Low Temperature ◽  
Metal Organic Frameworks ◽  
Low Temperature Sintering ◽  
Glass Composite ◽  
Waste Forms ◽  
Metal Organic

Atmospheric low-temperature plasma for direct post-synthetic modification of UiO-66

2020 ◽  
Vol 56 (43) ◽  
pp. 5803-5806
Author(s):  
Juan He ◽  
Fujian Xu ◽  
Yunfei Tian ◽  
Chenghui Li ◽  
Xiandeng Hou
Keyword(s):  
Low Temperature ◽  
Hydroxy Group ◽  
Metal Organic Frameworks ◽  
Low Temperature Plasma ◽  
Temperature Plasma ◽  
Modification Method ◽  
Metal Organic

A low-temperature plasma-based post-synthetic modification method was developed to directly introduce the hydroxy group into UiO-66 metal–organic frameworks (MOFs).

Low-temperature and highly sensitivity H2S gas sensor based on ZnO/CuO composite derived from bimetal metal-organic frameworks

2020 ◽  
Vol 46 (10) ◽  
pp. 15858-15866 ◽  
Author(s):  
Xu Wang ◽  
Sihan Li ◽  
Lili Xie ◽  
Xia Li ◽  
Donghai Lin ◽  
...  
Keyword(s):  
Low Temperature ◽  
Gas Sensor ◽  
Metal Organic Frameworks ◽  
H2s Gas Sensor ◽  
Metal Organic

Immobilisation process for contaminated zeolitic ion exchangers from Fukushima

MRS Advances ◽  
2016 ◽  
Vol 1 (62) ◽  
pp. 4089-4094 ◽  
Author(s):  
D. Pletser ◽  
R. K. Chinnam ◽  
M. Kamoshida ◽  
W.E. Lee
Keyword(s):  
Composite Material ◽  
Thermal Treatment ◽  
Low Temperature ◽  
Glass Composition ◽  
Glass Frit ◽  
Maximum Temperature ◽  
Sintering Process ◽  
Volatile Species ◽  
Glass Composite ◽  
Fukushima Daiichi

AbstractThe clean-up of the Fukushima Daiichi site, after the March 2011 earthquake and tsunami, continues to generate large amounts of spent adsorbents. These adsorbents need to be disposed of permanently in a low temperature immobilisation process to avoid volatilising radioactive Cs and Sr species. To this end an immobilisation process with a maximum temperature of 600 °C was developed by sintering model waste with glass frit to form a dense Glass Composite Material (GCM) wasteform. A zeolitic model wasteform, chabazite, was sintered with a lead borosilicate glass composition at a maximum temperature of 600 °C. The sintering process was optimised with various thermal treatment steps to ensure that volatile species, aqueous or otherwise, were released before full sintering to yield a dense final wasteform. With this process dense wasteforms of up to 40 wt. % chabazite have been achieved.

scholarly journals Mechanistic studies on the conversion of NO gas on urea-iron and copper metal organic frameworks at low temperature conditions: in situ infrared spectroscopy and Monte Carlo investigations

2021 ◽  
Author(s):  
Ahmed Eid ◽  
Mohammad Aminur Rahman ◽  
Hind A. Al-Abadleh
Keyword(s):  
Monte Carlo ◽  
Infrared Spectroscopy ◽  
Low Temperature ◽  
Catalytic Reduction ◽  
Metal Organic Frameworks ◽  
Chemical Properties ◽  
Surface Species ◽  
Temperature Conditions ◽  
Metal Organic

Nitrogen oxides (NOx) emissions from high temperature combustion processes under fuel-lean conditions continue to be a challenge for the energy industry. Selective catalytic reduction (SCR) has been possible with metal oxides and zeolites. There is still the need to identify catalytic materials that are efficient in reducing NOx to environmentally benign nitrogen gas at temperatures lower than 200°C. Metal-organic frameworks (MOFs) emerged as a class of highly porous materials with unique physical and chemical properties. This study is motivated by the lack of systematic investigations on SCR using MOFs under industrially-relevant conditions. Here, we investigate the extent of NO conversion with two commercially-available MOFs; Basolite F300 (Fe-BTC) and HKUST-1 (Cu-BTC), mixed with solid urea as a source for the reductant, ammonia gas. For comparison, experiments were also conducted using cobalt ferrite (CoFe2O4) as a non-porous counterpart to relate its reactivity to those obtained from MOFs. Fourier-transform infrared spectroscopy (FTIR) was utilized to identify gas and surface species the temperature range 115 -180°C. Computational analysis was performed using Monte Carlo (MC) simulations to quantify adsorption energies of different surface species. The results show that the rate of ammonia production from the in situ solid urea decomposition was higher using CoFe2O4 than Fe-BTC and Cu-BTC, and that there is very limited conversion of NO on the mixed solid urea-MOF systems due to site blocking. The main conclusions from this study is that MOFs have limited abilities in converting NO under low temperature conditions, and that surface regeneration requires additional experimental steps.

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