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Efficient MgO-doped CaO sorbent pellets for high temperature CO

Zhihong Xu, Tao Jiang, Hao Zhang, Yujun Zhao, Xinbin Ma, Shengping Wang

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 3,   Pages 698-708 doi: 10.1007/s11705-020-1981-2

Abstract: Novel MgO-doped CaO sorbent pellets were prepared by gel-casting and wet impregnation.The effect of Na and MgO on the structure and CO adsorption performance of CaO sorbent pellets wasMgO-doped CaO sorbent pellets with the diameter range of 0.5 1.5 mm exhibited an excellent capacity forCO adsorption and adsorption rate due to the homogeneous dispersion of MgO in the sorbent pellets andCa2Mg1 sorbent pellets exhibited favorable CO capture capacity (9.49 mmol∙g ), average adsorption rate

Keywords： MgO doping     CaO sorbent pellets     gel-casting technique     CO2 capture    

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Preparation and selection of Fe-Cu sorbent for COS removal in syngas

Bowu CHENG, Zhaofei CAO, Yong BAI, Dexiang ZHANG

Frontiers of Chemical Science and Engineering 2010, Volume 4, Issue 4,   Pages 441-444 doi: 10.1007/s11705-010-0507-8

Abstract: desulfurization performance, as well as the influence of operating conditions on sulfidation behavior of the sorbentThe result shows that the breakthrough sulfur capacity of the sorbent is as high as 25 g-S/100 g.space velocity of 1000 h , the efficiency of sulfur removal and breakthrough sulfur capacity of the sorbentresult shows that the species and content of additives also affect desulfurization performance of the sorbent

Keywords： sorbent     desulfurization     COS removal     syngas    

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Removal of dyes from wastewater by growing fungal pellets in a semi-continuous mode

Tao Lu, Qilei Zhang, Shanjing Yao

Frontiers of Chemical Science and Engineering 2017, Volume 11, Issue 3,   Pages 338-345 doi: 10.1007/s11705-017-1644-0

Abstract: To increase the efficiency of dye removal from wastewater using mycelial pellets, a bubble column reactorThe mycelial pellets were prepared by marine fungus ZJUBE-1.Eight dyes were tested as dye targets for the adsorption capacity of mycelial pellets and good removalThe bubble column reactor was utilized to study the batch dye-removal efficiency of mycelial pellets.

Keywords： dye     mycelial pellets     marine fungus     bubble column reactor     semi-continuous biosorption    

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New nanostructured sorbents for desulfurization of natural gas

Lifeng WANG, Ralph T. YANG

Frontiers of Chemical Science and Engineering 2014, Volume 8, Issue 1,   Pages 8-19 doi: 10.1007/s11705-014-1411-4

Abstract: that are generally lower than that from the large conventional reservoirs, if a superior adsorbent (sorbent

Keywords： desulfurization     natural gas desulfurization     hydrogen sulfide sorbent     amine-silica sorbent    

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Desulfurization performance of iron-manganese-based sorbent for hot coal gas

Xiurong REN, Weiren BAO, Fan LI, Liping CHANG, Kechang XIE

Frontiers of Chemical Science and Engineering 2010, Volume 4, Issue 4,   Pages 429-434 doi: 10.1007/s11705-010-0504-y

Abstract: The results show that the suitable addition of manganese oxide in iron-based sorbent can decrease H SFe O and MnO are the initial active components in iron-manganese-based sorbent, and FeO and Fe are activeThe reducibility of sorbent changes with the content of MnO in sorbent.S7F3M sorbent has stable sulfidation performance in three sulfidation-regeneration cycles and no apparentThe sulfidation performance of iron- manganese-based sorbent is also related with its specific surface

Keywords： iron-manganese-based sorbent     sulfidation performance     regeneration     hot coal gas    

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Reaction mechanism of arsenic capture by a calcium-based sorbent during the combustion of arsenic-contaminated

Mei Lei, Ziping Dong, Ying Jiang, Philip Longhurst, Xiaoming Wan, Guangdong Zhou

Frontiers of Environmental Science & Engineering 2019, Volume 13, Issue 2, doi: 10.1007/s11783-019-1110-y

Abstract:

CaO addition to arsenic-enriched biomass reduces

CaO captures arsenic via chemical adsorption

Keywords： Arsenic contamination     Phytoremediation     Emission control     Calcium-based sorbent     Biomass disposal     Pilot-scale    

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A thermodynamic study of the removal of HCl and H

Joseph LEE, Bo FENG

Frontiers of Chemical Science and Engineering 2012, Volume 6, Issue 1,   Pages 67-83 doi: 10.1007/s11705-011-1162-4

Abstract: The sorbents, Na CO , NaHCO , K CO , and CaO are capable of completely removing chlorine at high temperaturesNine of the sorbents namely; Cu O, Na CO , NaHCO , K CO , CaO, ZnO, MnO, FeO, and PbO, were determined

Keywords： syngas cleaning     sorbent     desulfurization     dechlorination    

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A feasibility study on using cassava stems for the production of bioenergy in Guangxi Zhuang Autonomous Region, China

Tao Guangcan,Xie Guanghui,Hakan Orberg,Xiong Shaojun

Strategic Study of CAE 2011, Volume 13, Issue 2,   Pages 107-112

Abstract: Cassava stems were proved a promising biofuel, and can be produced as pellets/briquettes, then productionof electricity, heat and pellets/briquettes.

Keywords： cassava stems     biofuel     pellet     production of electricity     heat and pellets/briquettes    

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Multi-stage ammonia production for sorption selective catalytic reduction of NO

Chen ZHANG, Guoliang AN, Liwei WANG, Shaofei WU

Frontiers in Energy 2022, Volume 16, Issue 5,   Pages 840-851 doi: 10.1007/s11708-021-0797-1

Abstract: Furthermore, the required mass of sorbent for each type of sorption-SCR is less than half of the mass

Keywords： selective catalytic reduction (SCR)     nitrogen oxides (NOx)     ammonia     composite sorbent    

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Feasibility study on simultaneous removal of sulfur and trace selenium in the MTD-FGD reactor

LI Yuzhong, TONG Huiling, ZHUO Yuqun, LI Yan, CHEN Changhe, XU Xuchang

Frontiers in Energy 2007, Volume 1, Issue 3,   Pages 259-263 doi: 10.1007/s11708-007-0036-4

Abstract: simultaneous removal of sulfur dioxide (SO) and trace selenium dioxide (SeO) from flue gas by calcium oxide (CaOWhen CaO conversion is relatively low and the reaction rate is controlled by chemical reaction kineticsWhen CaO conversion is very high and the reaction rate is controlled by product layer diffusion, thepilot scale MTD-FGD tests, it can be concluded that in the MTD-FGD reactor, the sulfate reaction of sorbentTherefore, it is feasible that sulfur and trace selenium can be simultaneously removed by Ca-based sorbent

Keywords： Ca-based sorbent     product     feasibility     thermogravimetric analyzer     simultaneous removal    

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Regeneration of Fe

Ruizhuang ZHAO, Ju SHANGGUAN, Yanru LOU, Jin SONG, Jie MI, Huiling FAN

Frontiers of Chemical Science and Engineering 2010, Volume 4, Issue 4,   Pages 423-428 doi: 10.1007/s11705-010-0503-z

Abstract: Regeneration of a high-temperature coal gas desulfurization sorbent is a key technology in its industrialregeneration gas concentration in SO atmosphere on regeneration performances of the desulfurization sorbentThe changes of phase and the composition of the Fe O -based high-temperature coal gas desulfurization sorbentconcentration in inlet on regeneration performances and the changes of pore structure of the desulfurization sorbentThe desulfurization sorbent cannot be regenerated at 500°C in SO atmosphere.

Keywords： high-temperature coal gas     Fe2O3 desulfurization sorbent     SO2 atmosphere    

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The research and development of biomass fuel pellets production line and key manufacturing technology

Zhu Dianxiang

Strategic Study of CAE 2014, Volume 16, Issue 4,   Pages 13-16

Abstract: style="text-align: justify;">As an important field of the conversion of biomass energy，biomass fuel pellets

Keywords： biomass fuel pellet     combustion performance     energy conservation and emissions reduction     production line     manufacturing technology     key equipments    

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Tubes with coated and sintered porous surface for highly efficient heat exchangers

Hong Xu, Yulin Dai, Honghai Cao, Jinglei Liu, Li Zhang, Mingjie Xu, Jun Cao, Peng Xu, Jianshu Liu

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 3,   Pages 367-375 doi: 10.1007/s11705-018-1703-1

Abstract:

Surface modification is a direct and effective way to enhance the efficiency of heat exchangers. Surface modification by forming a microporous coated layer can greatly enhance the boiling heat transfer and thus achieve a high performance. In this paper, we systematically investigate the boiling behavior on a plain surface with/without sintered microporous coatings of copper powder. The results demonstrated that the sintered surface has a better performance in nucleate boiling due to the increased nucleation sites. The superheat degree is lower and the bubble departure diameter is larger for the sintered surface than for the plain surface, so the heat can be carried away more efficiently on the sintered surface. In addition, the heat transfer capacity on the sintered surface depends on both the powder size and the coating thickness for a high flux tube. The optimum heat transfer capacity can be obtained when the thickness of the microporous coating layer is 3–5 times of the sintered powder diameter. As a result, the heat transfer coefficient tube can be up to 3 times higher for the tube with a sintered surface than that with a plain surface, showing a pronounced enhancement in heat transfer and a high potential in chemical engineering industry application.

Keywords： microporous coating layer     surface modification     boiling enhancement     sintering    

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Monte Carlo simulation of the PEMFC catalyst layer

WANG Hongxing, CAO Pengzhen, WANG Yuxin

Frontiers of Chemical Science and Engineering 2007, Volume 1, Issue 2,   Pages 146-150 doi: 10.1007/s11705-007-0027-3

Abstract: The performance of the polymer electrolyte membrane fuel cell (PEMFC) is greatly controlled by the structure of the catalyst layer. Low catalyst utilization is still a significant obstacle to the commercialization of the PEMFC. In order to get a fundamental understanding of the electrode structure and to find the limiting factor in the low catalyst utilization, it is necessary to develop the mechanical model on the effect of catalyst layer structure on the catalyst utilization and the performance of the PEMFC. In this work, the structure of the catalyst layer is studied based on the lattice model with the Monte Carlo simulation. The model can predict the effects of some catalyst layer components, such as Pt/C catalyst, electrolyte and gas pores, on the utilization of the catalyst and the cell performance. The simulation result shows that the aggregation of conduction grains can greatly affect the degree of catalyst utilization. The better the dispersion of the conduction grains, the larger the total effective area of the catalyst is. To achieve higher utilization, catalyst layer components must be distributed by means of engineered design, which can prevent aggregation.

Keywords： catalyst utilization     PEMFC     commercialization     Pt/C catalyst     conduction    

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Treatment of gingival hyperplasia induced by cyclosporine A

MA Jingzhi, LI Ming, CAO Yingguang

Frontiers of Medicine 2008, Volume 2, Issue 3,   Pages 290-294 doi: 10.1007/s11684-008-0055-5

Abstract: The clinical therapy for cyclosporine A (CsA)-induced gingival hyperplasia (GH) and the pathological changes in hyperplastic gingival tissues were investigated. Nine cases of CsA-induced GH after renal transplantation were subjected to periodontal non-surgical treatment and surgical treatment and were followed up. Gingival index (GI), dental plaque index (PLI) and GH degree (GHD) at different time points were measured. Under light and electron microscopy, the pathological changes in hyperplastic gingival tissues were observed. The CsA concentrations in gingival tissues and blood were determined by using fluorescence polarization immunoassay with TDFL monoclonal antibody. The results showed that GI, PLI and GHD in patients with GH declined after periodontal treatment. Two patients suffered from different degrees of GH during the 6 months to 54 months post-transplantation. Under transmission electron microscopy, fibroblasts in the hyperplastic gingival tissues were enlarged, cytoplasmic rough endoplasmic reticula were abundant and expanded slightly, and a few fibroblasts with early apoptotic changes were seen. The concentrations of CsA in hyperplastic gingival tissues were from 351.00 to 1345.47 ng/mL, which were significantly higher than in the blood of the same patients taken at the same time points. It was concluded that GI and PLI declined after periodontal treatment in combination with surgical treatment in patients taking CsA for a long time, but in some patients, GH recurred. The fact that the concentration of CsA in hyperplastic gingival tissues is higher than in blood awaits further studies.

Keywords： post-transplantation     Gingival     cytoplasmic     CsA-induced     further    

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Title Author Date Type Operation

Efficient MgO-doped CaO sorbent pellets for high temperature CO

Zhihong Xu, Tao Jiang, Hao Zhang, Yujun Zhao, Xinbin Ma, Shengping Wang

Journal Article

Preparation and selection of Fe-Cu sorbent for COS removal in syngas

Bowu CHENG, Zhaofei CAO, Yong BAI, Dexiang ZHANG

Journal Article

Removal of dyes from wastewater by growing fungal pellets in a semi-continuous mode

Tao Lu, Qilei Zhang, Shanjing Yao

Journal Article

New nanostructured sorbents for desulfurization of natural gas

Lifeng WANG, Ralph T. YANG

Journal Article

Desulfurization performance of iron-manganese-based sorbent for hot coal gas

Xiurong REN, Weiren BAO, Fan LI, Liping CHANG, Kechang XIE

Journal Article

Reaction mechanism of arsenic capture by a calcium-based sorbent during the combustion of arsenic-contaminated

Mei Lei, Ziping Dong, Ying Jiang, Philip Longhurst, Xiaoming Wan, Guangdong Zhou

Journal Article

A thermodynamic study of the removal of HCl and H

Joseph LEE, Bo FENG

Journal Article

A feasibility study on using cassava stems for the production of bioenergy in Guangxi Zhuang Autonomous Region, China

Tao Guangcan,Xie Guanghui,Hakan Orberg,Xiong Shaojun

Journal Article

Multi-stage ammonia production for sorption selective catalytic reduction of NO

Chen ZHANG, Guoliang AN, Liwei WANG, Shaofei WU

Journal Article

Feasibility study on simultaneous removal of sulfur and trace selenium in the MTD-FGD reactor

LI Yuzhong, TONG Huiling, ZHUO Yuqun, LI Yan, CHEN Changhe, XU Xuchang

Journal Article

Regeneration of Fe

Ruizhuang ZHAO, Ju SHANGGUAN, Yanru LOU, Jin SONG, Jie MI, Huiling FAN

Journal Article

The research and development of biomass fuel pellets production line and key manufacturing technology

Zhu Dianxiang

Journal Article

Tubes with coated and sintered porous surface for highly efficient heat exchangers

Hong Xu, Yulin Dai, Honghai Cao, Jinglei Liu, Li Zhang, Mingjie Xu, Jun Cao, Peng Xu, Jianshu Liu

Journal Article

Monte Carlo simulation of the PEMFC catalyst layer

WANG Hongxing, CAO Pengzhen, WANG Yuxin

Journal Article

Treatment of gingival hyperplasia induced by cyclosporine A

MA Jingzhi, LI Ming, CAO Yingguang

Journal Article