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K.S. Bharathi, S.P.T. Ramesh, Fixed-bed column studies on biosorption of crystal violet from aqueous solution by Citrullus lanatus rind and Cyperus rotundus. Appl. Water Sci. 3(4), 673–687 (2013) Rhenium (Re) is not a very common element in heterogeneous catalysis, and it is only sometimes considered to be a noble metal. An example of its application in heterogeneous catalysis is the deoxydehydration (DODH) of biomass-derived polyols to produce adipic acid over ReO x supported on ZrO 2 [ 126]. There has, however, recently been a handful of reports where Re is studied as a promoter in Ni-based catalysts for methanation. Lastly, Pandey et al. [ 77] performed a study in which they used unsupported NiO as a catalyst precursor and introduced various Fe amounts. Similarly to many of their supported counterparts [ 26, 39], Ni catalysts modified with Fe in a stoichiometry of Ni/Fe > 1 exhibited an increase in catalytic activity for CO 2 methanation compared to metallic Ni catalyst. The catalysts that consisted of Ni-rich NiFe alloys with 10% Fe and 25% Fe yielded the best results. The one with 10% Fe was shown to be the most active and the higher activity was ascribed to the absence of unalloyed Fe in this catalyst [ 77]. When Ni nanowires were used instead of Ni powder, the higher surface area of the 1D nanostructure led to a higher CO 2 methanation catalytic activity, with 100% CO 2 conversion being reached at just 179 °C.
Fenton催化剂Fe/AC [ 15]。首先，用去离子水洗涤AC 3次，并在105 ℃下烘干8 h；然后，将6 g AC置于自封袋中，加入3.3 mL 0.52 g·mL −1的Fe(NO 3) 3·9H 2O溶液，立即将自封袋封口，摇晃使其浸渍均匀，于室温放置2 h后，在60 ℃干燥12 h；最后，在200 ℃马弗炉中热处理4 h，制备得到Fe/AC催化剂。 KO C H, FAN C, CHIANG P N, et al. P-nitrophenol, phenol and aniline sorption by organo-clays[J]. Journal of Hazadrous Materials, 2007, 149(2): 275-282. doi: 10.1016/j.jhazmat.2007.03.075 Lane Departure Warning Unit, Emergency Pad Switch, IBU, Console Switch, ATM Shift Lever Indicator, AWD ECU, Sport Mode SwitchIf desired, you can also set options such as grouping of activities or warnings before the start of an activity. NiRe bimetallic catalysts were supported on coal combustion fly ash (CCFA) from industrial waste. Re addition improved Ni dispersion and the catalyst resistance towards sintering and coking, leading to better performance for CO 2 methanation.
Hazard Relay, Hazard Switch, BCM, Instrument Cluster (IND.), Multifunction Switch (Light), Rear Combination Lamp (OUT) LH/RH, Head Lamp LH/RH TIAN J N, ZHAO J X, AYOBAMI M O, et al. Effective degradation of rhodamine B by electro-Fenton process, using ferromagnetic nanoparticles loaded on modified graphite felt electrode as reusable catalyst: In neutral pH condition and without external aeration[J]. Environmental Science and Pollution Research, 2016, 23: 15471-15482. doi: 10.1007/s11356-016-6721-2 S. Bhattacharjee, C. Chen, W.-S. Ahn, Chromium terephthalate metal-organic framework MIL-101: synthesis, functionalization, and applications for adsorption and catalysis. RSC Adv. 4(94), 52500–52525 (2014) Ru addition on Ni/CeO 2-ZrO 2 could increase surface basicity and promote Ni dispersion. Thus, the formation of a NiRu bimetallic catalyst enhanced the low-temperature catalytic activity for CO 2 methanation.
The transition metals Fe and Co offer the obvious advantage of being cheap like Ni and their similar size and electronic properties allow for their intricate interaction with the Ni primary phase and their easy dissolution into the Ni lattice, forming NiFe and NiCo alloys, respectively. The composition of the formed alloy is of great importance, since only specific bimetallic combinations can lead to an optimal CO 2 methanation performance, especially in the case of NiFe alloys. The combined bimetallic catalysts can also offer additional advantages, such as higher stability, as well as resistance towards oxidation and sulphur poisoning. U. Daiminger, W. Lind, Adsorption Processes for Natural Gas Treatment (Engelhard Corp, USA, 2004), p. 14 Please note: The old connections to your smartphone, tablet or calendar application won't be working anymore. Initially, Han et al. [ 127] screened 63 different elements as potential promoters in Ni/Al 2O 3 catalysts for the methanation of CO, with the help of data mining technology. Their model predicted that promoting a Ni/Al 2O 3 catalyst with Re could potentially lead to the largest drop in the temperature for 50% conversion (T 50) by 78 °C, compared to the unpromoted Ni/Al 2O 3. In another computational study, Yuan et al. [ 128] showed that the high oxygen affinity of Re can render it a favourable element to facilitate C-O bond scission during CO 2 methanation. Their calculations indicated that isolated Re atoms on top of Ni(111) facets can accommodate O adatoms cleaved from COOH*/HCOO* and CHO*/CO* intermediates, whereas CO* and H* can be found adsorbed on the Ni(111) surface. The synergistic collaboration between the Ni surface and Re dopant atoms could promote the scission of C-O bonds, increasing CH 4 selectivity and favouring the overall catalytic activity for CO 2 methanation.
Sometimes this menu allows you to choose a group or filter a timetable to only show activities of a certain type, for example exams. This can also be done for a group of timetables (e.g., a study year) at once, using the button to the right of the group name. Semestry is the processor of this data and will therefore not carry out processing operations without permissions from Falmouth University, unless required due to legal obligations. H. Rajati, A.H. Navarchian, S. Tangestaninejad, Preparation and characterization of mixed matrix membranes based on Matrimid/PVDF blend and MIL-101(Cr) as filler for CO 2/CH 4 separation. Chem. Eng. Sci. 185, 92–104 (2018)
Audio, audio / video and navigation head unit, instrument cluster, air conditioning control module, low voltage dc converter (audio / amplifier), head-up display, rain sensor, rear passenger warning (ROA) sensor, driver IMS control module, module driver's door, driver / passenger electric outside mirror, power tailgate module You can open an iCalendar-, or iCal file for short, using calendar applications such as Microsoft Outlook or Apple Calendar. It has been previously mentioned that CeO 2 support can offer significant advantages regarding the CO 2 methanation performance of Ni-based catalysts, when compared with other metal oxide supports [ 12]. However, Fe modification of Ni catalysts supported on CeO 2-based supports appears to exert a negative influence on CO 2 methanation. Winter et al. [ 68] studied CeO 2-supported NiFe catalysts with low metal loadings of Ni and Fe (1.5% Ni and 0.5–1.5% Fe). In contrast to the ZrO 2 supported catalysts reported by Yan et al. [ 65], Fe modification, even in small amounts, led to a significant drop in CO 2 conversion and rise in CO selectivity. The majority of Fe remained oxidized according to X-ray absorption near edge structure (XANES) analysis and these oxidized Fe species probably led to a weakened interaction between metal and intermediate CO, thus facilitating CO desorption and higher CO selectivity [ 68].
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