Natural Gas Steam Reforming over Rhodium/Alumina Catalysts: Experimental and Numerical Study of the Carbon Deposition from Ethylene and Carbon Monoxide

2014 ◽  
Vol 53 (31) ◽  
pp. 12270-12278 ◽  
Author(s):  
Claudia Eßmann ◽  
Lubow Maier ◽  
Aijun Li ◽  
Steffen Tischer ◽  
Olaf Deutschmann
Keyword(s):  
Carbon Monoxide ◽  
Natural Gas ◽  
Steam Reforming ◽  
Carbon Deposition ◽  
Numerical Study ◽  
Alumina Catalysts

Hydrogen Production by Steam Reforming of Natural Gas Over Vanadium–Nickel–Alumina Catalysts

2018 ◽  
Vol 18 (9) ◽  
pp. 6541-6546 ◽  
Author(s):  
Jaekyeong Yoo ◽  
Seungwon Park ◽  
Ji Hwan Song ◽  
In Kyu Song
Keyword(s):  
Hydrogen Production ◽  
Natural Gas ◽  
Steam Reforming ◽  
Alumina Catalysts

Numerical study on laminar flame speed of natural gas-carbon monoxide-air mixtures

2010 ◽  
Vol 4 (4) ◽  
pp. 411-416
Author(s):  
Chen Dong ◽  
Qulan Zhou ◽  
Qinxin Zhao ◽  
Tongmo Xu ◽  
Shi’en Hui
Keyword(s):  
Carbon Monoxide ◽  
Natural Gas ◽  
Laminar Flame ◽  
Numerical Study ◽  
Flame Speed ◽  
Laminar Flame Speed

Ultra-Low Amounts of Palladium (0.005-0.05 Wt% Pd) Supported on Titania: Remarkable Low-Temperature Activity for NO Reduction with CO and Structure-Function Property Relationships in Methane Oxidation

2020 ◽  
Author(s):  
Konstantin Khivantsev ◽  
Libor Kovarik ◽  
Nicholas R. Jaegers ◽  
János Szanyi ◽  
Yong Wang
Keyword(s):  
Nitric Oxide ◽  
Carbon Monoxide ◽  
Methane Oxidation ◽  
Steam Reforming ◽  
Methane Steam Reforming ◽  
Oxide Reduction ◽  
Water Steam ◽  
Methane Steam ◽  
Anatase Titania ◽  
Nitric Oxide Reduction

<p>Atomically dispersed Pd +2 cations with ultra-dilute loading of palladium (0.005-0.05 wt%) were anchored on anatase titania and characterized with FTIR, microscopy and catalytic tests. CO infrared adsorption produces a sharp, narrow mono-carbonyl Pd(II)-CO band at ~2,130 cm<sup>-1</sup> indicating formation of highly uniform and stable Pd+2 ions on anatase titania. The 0.05 wt% Pd/TiO<sub>2</sub> sample was evaluated for methane combustion under dry and wet (industrially relevant) conditions in the presence and absence of carbon monoxide. Notably, we find the isolated palladium atoms respond dynamically upon oxygen concentration modulation (switching-on and switching off). When oxygen is removed from the wet methane stream, palladium ions are reduced to metallic state by methane and catalyze methane steam reforming instead of complete methane oxidation. Re-admission of oxygen restores Pd<sup>+2</sup> cations and switches off methane steam reforming activity. Moreover, 0.05 wt% Pd/TiO<sub>2</sub> is a competent CO oxidation catalyst in the presence of water steam with 90% CO conversion and TOF ~ 4,000 hr<sup>-1</sup> at 260 ⁰C. </p><p>More importantly, we find that diluting 0.05 wt% Pd/titania sample with titania to ultra-low 0.005 wt% palladium loading produces a remarkably active material for nitric oxide reduction with carbon monoxide under industrially relevant conditions with >90% conversion of nitric oxide at 180 ⁰C (~460 ppm NO and 150 L/g*hr flow rate in the presence of >2% water steam) and TOF ~6,000 hr<sup>-1</sup>. Pd thus outperforms state-of-the-art rhodium containing catalysts with (15-20 times higher rhodium loading; rhodium is ~ 3 times more expensive than palladium). Furthermore, palladium catalysts are more selective towards nitrogen and produce significantly less ammonia relative to the more traditional rhodium catalysts due to lower Pd amount nd lower water-gas-shift activity. Our study is the first example of utilizing ultra-low (0.05 wt% and less) noble metal (Pd) amounts to produce heterogeneous catalysts with extraordinary activity for nitric oxide reduction. This opens up a pathway to study other Pd, Pt and Rh containing materials with ultra-low loadings of expensive noble metals dispersed on titania or titania-coated oxides for industrially relevant nitric oxide abatement.</p>

(Ni,Cu)/hexagonal BN nanohybrids – New efficient catalysts for methanol steam reforming and carbon monoxide oxidation

2020 ◽  
Vol 395 ◽  
pp. 125109 ◽  
Author(s):  
Andrey M. Kovalskii ◽  
Andrei T. Matveev ◽  
Zakhar I. Popov ◽  
Ilia N. Volkov ◽  
Ekaterina V. Sukhanova ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Steam Reforming ◽  
Carbon Monoxide Oxidation ◽  
Methanol Steam Reforming

Carbon monoxide formation as an intermediate product in photocatalytic steam reforming of methane with lanthanum-doped sodium tantalate

2021 ◽  
Author(s):  
Wirya Sarwana ◽  
Akihiko Anzai ◽  
Daichi Takami ◽  
Akira Yamamoto ◽  
Hisao Yoshida
Keyword(s):  
Carbon Monoxide ◽  
Solar Energy ◽  
Steam Reforming ◽  
Intermediate Product ◽  
Room Temperature ◽  
Carbon Monoxide Formation ◽  
Steam Reforming Of Methane

Photocatalytic steam reforming of methane (PSRM) has been studied as an attractive method to produce hydrogen by utilizing photoenergy like solar energy around room temperature with metal-loaded photocatalysts, where methane...

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