The positive effect of siderite-derived α-Fe2O3 during coaling on the NO behavior in the presence of NH3

Shu, Daobing; Li, Haibo; Chen, Tianhu; Chen, Dong; Wang, Can; Li, Mengxue; Wang, Hanlin

doi:10.1007/s11356-020-07829-x

Cited by 13 publications

(3 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The surface area obtained by applying the BET method was 7.57 ± 0.02 m 2 g −1 . The value was similar to that obtained in another investigation 38 but it was considerably higher than that obtained for other iron minerals, being ∼ 4 and ∼ 20 times higher than for goethite and hematite, respectively 39. This result is promising, considering siderite as the best one to immobilize Se(IV) compared to the other previous iron minerals.…”

Section: Resultssupporting

confidence: 88%

Se(IV) Immobilization onto Natural Siderite: Implications for High‐Level Nuclear Waste Repositories

et al. 2021

View full text Add to dashboard Cite

Sorption processes of metals and semimetals on siderite are studied because of its potential adequacy for removing contaminants from natural waters and its wide availability, as well as its capacity to reduce the oxidation state of some contaminants such as selenium. In this work, it has been demonstrated that siderite reduces selenite ions in solution, showing a higher selenium immobilization capacity compared to other iron(III) minerals, which is probably due to both sorption and reduction processes.

show abstract

Section: Resultssupporting

confidence: 88%

Se(IV) Immobilization onto Natural Siderite: Implications for High‐Level Nuclear Waste Repositories

et al. 2021

View full text Add to dashboard Cite

show abstract

“…This phenomenon indicated that the addition of Fe leads to the partial destruction or occupation of a part of the acid sites on the CeNb 3 /TiO 2 catalyst, as well as to the transformation of some strong acid sites to intermediate acid sites (Zi et al 2019). This may result from that the introduction of Fe can improve the redox ability of the catalyst slightly, and lowmedium acid can effectively promote the adsorption process (Liu et al 2016, Shu et al 2020. Compared to strong acid sties, medium-low strong acid sites could prevent excess oxidation performance, thereby inhibiting N 2 O formation and promoting NO conversion (Niu et al 2016).…”

Section: Nh 3 -Tpd Analysismentioning

confidence: 98%

Remarkable Enhancement In The N2- Selectivity of NH3-SCR Over The CeNb3Fe0.3/TiO2 Catalyst In The Presence of Chlorobenzene

Zang

Liu

et al. 2021

Preprint

View full text Add to dashboard Cite

The simultaneous removal of NOx and dioxins is the frontier of environmental catalysis, which is still in the initial stage and poses several challenges. In this study, a series of CeNb3Fex/TiO2 (x = 0, 0.3, 0.6, and 1.0) catalysts were prepared by the sol-gel method and examined for the synergistic removal of NOx and chlorobenzene. The CeNb3Fe0.3/TiO2 catalyst exhibits an optimum catalytic performance, with an NOx conversion greater than 95 % at 260-380 °C. It also exhibited an optimal CB oxidation activity, in which CB promoted both the NOx conversion and N2 selectivity below 250 °C. Moreover, the more favourable ratios of Ce4+ to Ce3+, and plentiful surface adsorbed oxygen species are the reasons why CeNb3Fe0.3/TiO2 catalyst has better catalytic activity than other catalysts at lower temperature. Simultaneously, owing to the modulation of Fe to the redox properties of Ce and Nb, the large number of oxygen vacancies and acid sites, the CeNb3Fe0.3/TiO2 catalyst is is beneficial to NOx reduction and CB oxidation. Further, the results of in situ DRIFTS study reveal the NH3-SCR reactions over CeNb3Fex/TiO2 catalysts are mainly controlled by the L-H mechanism (< 200 °C) and E-R mechanism (> 200 °C), respectively.

show abstract

“…The lightning of tar can solve the problem of equipment and pipeline blockage caused by the condensation of heavy components in tar. , The catalyst is also easily separated and recovered in the catalytic layer. High-temperature gas-phase tar produced by pyrolysis enters the catalytic layer for catalysis, which avoids the energy consumption of tar heating in the traditional catalytic cracking process and improves the energy efficiency of the process. − …”

Section: Introductionmentioning

confidence: 99%

Study on In Situ Catalytic Cracking of Coal Tar by Plasma Preparation of the Pyrolysis Coke Catalyst

et al. 2020

View full text Add to dashboard Cite

A two-stage pyrolysis fixed bed was used, and the vapor-modified pyrolysis coke was used as a carrier. A ZHPC catalyst was prepared by plasma calcination. Gas-phase tar produced by the pyrolysis of raw coal was subjected to in situ catalytic cracking to improve tar and gas yield. The effects of plasma calcination power, calcination time, and ZnO loading on in situ cracked products were studied. The prepared catalyst was characterized by X-ray electron spectroscopy, X-ray diffraction, Brunauer–Emmett–Teller, and scanning electron microscopy. The results showed that (1) compared with traditional catalysts, the catalyst prepared by plasma has better performance; (2) the optimal calcination time of the ZHPC catalyst is 5 min, calcination power is 60 W, and ZnO loading is 10%; (3) compared with raw coal pyrolysis, the optimal ZHPC catalyst on in situ catalytic cracking tar, gas yield increased by 66.16%; the cracking rate of tar increased by 54.46%, and the content of light components increased to 60.7%; (4) in situ catalytic cracking of tar with the optimal PC, the light tar has been greatly improved, in which the light oil, phenol oil, naphthalene oil, and wash oil have increased by 93.04, 126.31, 257.28, and 108.08%, respectively. The anthracene oil and asphalt have decreased by 26.98 and 58.71%; the tar cracking rate has increased.

show abstract

The positive effect of siderite-derived α-Fe2O3 during coaling on the NO behavior in the presence of NH3

Cited by 13 publications

References 46 publications

Se(IV) Immobilization onto Natural Siderite: Implications for High‐Level Nuclear Waste Repositories

Se(IV) Immobilization onto Natural Siderite: Implications for High‐Level Nuclear Waste Repositories

Remarkable Enhancement In The N2- Selectivity of NH3-SCR Over The CeNb3Fe0.3/TiO2 Catalyst In The Presence of Chlorobenzene

Study on In Situ Catalytic Cracking of Coal Tar by Plasma Preparation of the Pyrolysis Coke Catalyst

Contact Info

Product

Resources

About