Highly stable and regenerable Mn-based/SBA-15 sorbents for desulfurization of hot coal gas

Zhang, F.M.; Liu, B.S.; Zhang, Y.; Guo, Yin; Wan, Ziyao; Subhan, Fazle

doi:10.1016/j.jhazmat.2012.07.023

Cited by 55 publications

(36 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Sulfidation tests were performed at atmospheric pressure in a vertical fixed bed quartz-tube microreactor (10 mm inner diameter, loaded with 0.2 g of sorbent) to evaluate the desulphurization performances of xCeyMn/ZSM-5 at 50 mg/m 3 H 2 S breakthrough [20]. The quartz-tube microreactor was placed in a temperature controlled tubular furnace to control the reaction temperature and a thermocouple placed in the center of the sorbent bed was used to measure the reaction temperature.…”

Section: Desulphurization/regeneration Performancementioning

confidence: 99%

“…The used sorbents were regenerated at 750°C in a 5% O 2 /N 2 mixture with WHSV of 45,000 mL h À1 g À1 on a fixed bed until no sulfur element formation and the characteristic peak of SO 2 in the effluent cannot be detected by the gas chromatograph. Eventually, 5% O 2 /N 2 mixture was switched into N 2 and sorbents were treated in pure nitrogen at 750°C for 1 h to decompose the sulfates formed at the regeneration processes [20].…”

Section: Desulphurization/regeneration Performancementioning

confidence: 99%

“…In addition, the specific surface areas and pore volumes of unsupported sorbents are quite small and they are easy to be sintering during preparation and sulfidation processes. To overcome this drawback, many researches have been focused on supporting metal oxides onto high-surface-area mesopore silica materials [19,20]. ZSM-5 as a support or catalyst has been extensively used in the field of NO reduction [21], NO adsorption [22], and petrochemical industry [23,24] because of its high surface area and thermal stability.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

CeO 2 –MnO x /ZSM-5 sorbents for H 2 S removal at high temperature

Liu

Zhang

2016

Chemical Engineering Journal

View full text Add to dashboard Cite

Section: Desulphurization/regeneration Performancementioning

confidence: 99%

Section: Desulphurization/regeneration Performancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

CeO 2 –MnO x /ZSM-5 sorbents for H 2 S removal at high temperature

Liu

Zhang

2016

Chemical Engineering Journal

View full text Add to dashboard Cite

“…Compared with the other supports, the mesoporous silica is considered to be a more suitable due to its high surface area, large pore volume and narrow pore size distributions. Mesoporous silica supported sorbents, such as ZnO/SBA-15 [34,35], Mn-Cu/SBA-15 [36] presented good desulfurization performance.…”

Section: Introductionmentioning

confidence: 99%

High-temperature desulfurization of hot coal gas on Mo modified Mn/KIT-1 sorbents

Zhang

Liu

Wang

et al. 2015

Chemical Engineering Journal

Self Cite

View full text Add to dashboard Cite

“…The oxides of Zn, Fe, Ca, Mn and Co as H 2 S sorbents for HTGD are investigated extensively nowadays [7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

The Effects of CeO2 Addition on the Performance of Zinc Oxide Sorbent Prepared by Microwave Solid-State Method for H2S Removal

Su¹,

Wu²,

Li³

et al. 2015

Proceedings of the 2015 International Symposium on Energy Science and Chemical Engineering

View full text Add to dashboard Cite

Abstract. ZnO sorbents with different CeO 2 loadings were prepared by microwave calcination and tested the performance for H 2 S removal in a fixed-bed reactor at 500 . The results r ℃ evealed that the Ce-doped sorbents have a higher efficiency and longer breakthrough time compared with non-modified sorbents. The optimal sulfur capacity (13.03 gS/100 g) and breakthrough time (17.5 h) were obtained when the content of CeO 2 up to 4 wt.%. XRD, SEM, XPS and mercury porosimetry methods were used to characterize the structure of sorbents. Analysis data indicated that the addition of CeO 2 leads to better pore structure and larger specific surface, which facilitates the diffusion of H 2 S into the active sites. Furthermore, the presence of CeO 2 also results in an increase in the content of surface elements including Zn and O, which contributes to improve the ability of H 2 S removal. IntroductionThe integrated coal gasification combined cycle (IGCC) process is considered as one of the promising clean coal technologies in the 21st century [1][2][3], meanwhile the high temperature gas desulfurization (HTGD) was regarded as one of the key techniques in the IGCC system [2][3][4][5][6][7]. The oxides of Zn, Fe, Ca, Mn and Co as H 2 S sorbents for HTGD are investigated extensively nowadays [7][8][9][10][11][12][13].Among these sorbents, Zinc oxide sorbents are considered to be the most promising material for HTGD because of its large sulfur capacity and excellent desulfurization thermodynamics [7,14,15]. Up to now, many synthesis methods have been investigated [16][17][18][19][20]. In comparison with traditional preparation methods, microwave irradiation is a burgeoning method to prepare desulfurizer by virtue of it can provide a rapid drying and evenly heating [21]. The advantages of microwave heating over conventional heating have been studied in our previous work [22].But under the condition of high temperature, the ZnO sorbents would evaporate thus limit its development [7,23]. Moreover, single ZnO sorbents show many disadvantages such as decrease of sorbent efficiency and degradation of the mechanical properties [24]. In order to improve the performance, ZnO sorbents mixed with many metal oxides have been evaluated [24][25][26][27]. CeO 2 as one of the most promising rare earths has an outstanding oxygen storage capacity and improve the performance of ZnO sorbents for desulfurization [11,[28][29][30].In this paper, the performance of ZnO based sorbents doped with various content of CeO 2 employed for high temperature coal gas desulfurization were studied. Also, the effects of the amount of CeO 2 loaded to the sorbents on the performance for H 2 S removal were studied. The analysis data of structure and textural properties were provided by XRD, XPS, SEM and mercury porosimetry.

show abstract

Highly stable and regenerable Mn-based/SBA-15 sorbents for desulfurization of hot coal gas

Cited by 55 publications

References 58 publications

CeO 2 –MnO x /ZSM-5 sorbents for H 2 S removal at high temperature

CeO 2 –MnO x /ZSM-5 sorbents for H 2 S removal at high temperature

High-temperature desulfurization of hot coal gas on Mo modified Mn/KIT-1 sorbents

The Effects of CeO2 Addition on the Performance of Zinc Oxide Sorbent Prepared by Microwave Solid-State Method for H2S Removal

Contact Info

Product

Resources

About