Reduction of SO 2 to elemental sulfur with H 2 and mixed H 2 /CO gas in an activated carbon bed

Feng, Tai; Huo, Mengjia; Zhao, Xinbing; Wang, Tao; Xiao, Xia; Ma, Chunyuan

doi:10.1016/j.cherd.2017.03.014

Cited by 69 publications

(26 citation statements)

References 22 publications

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“…Also, BJH pore size distributions of single Ce2O3 and ternary Ce/La(10)/Co (8) and Ce/La(12)/Co(12) catalysts are indicated in Figure 8. As observed, the highest amount of mesopores (2−50 nm) was found for ternary Ce/La (10) /Co(8) among the synthesized catalysts. According to IU-PAC classification, the high N2 adsorption at high relative pressure (p/p0) shows the mesoporous adsorption [36].…”

Section: B the Characterization Of Ternary Ce/la/co Catalystssupporting

confidence: 58%

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Preparing and Optimization of Cerium-Lanthanum-Cobalt Ternary Mixed Oxide as Catalyst for SO<sub>2</sub> Reduction to Sulfur

Khangah

Sarraf

Ebrahim

et al. 2019

e-J. Surf. Sci. Nanotechnol.

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In this work, various ternary cerium oxide/lanthanum oxide/cobalt oxide (Ce/La/Co) nanocatalysts were synthesized by co-precipitation method based on response surface methodology (RSM). The optimum predicted surface area was found to be 67.6 m 2 g −1 at calcination temperature of 650℃, La content of 10.0 wt%, and Co content of 8.0 wt%. Average crystal size of optimum ternary Ce/La/Co catalyst was estimated 11.4 nm. The confirmation tests revealed that experimental data can be predicted well by the model. Furthermore, the prepared catalysts were evaluated by Brunauer-Emmett-Teller (BET), Barrett-Joyner-Halenda (BJH), X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), energy-dispersive X-ray (EDX) and NH3 temperature programmed desorption (NH3-TPD) analyses. The characterization results confirmed that ternary Ce/La/Co catalysts were successfully synthesized. Also, the NH3-TPD result showed that total active sites of optimum ternary Ce/La(10)/Co(8) catalyst with La content of 10.0 wt% and Co content of 8.0 wt% was greater than that of single cerium oxide catalyst. The optimum synthesized catalyst was tested for SO2 reaction by methane to sulfur. SO2 conversion and selectivity of catalysts at various temperatures were determined. The better performance of Ce/La/Co optimum catalyst at different temperatures was obtained for SO2 reduction. Also the selectivity of the optimum catalyst for production of sulfur is better than other catalysts.

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Section: B the Characterization Of Ternary Ce/la/co Catalystssupporting

confidence: 58%

“…Several reducing agents have been investigated for SO2 reduction, including CO [9], H2 [10], CH4 [11], and synthesis gas (CO + H2) [11]. But good accessibility and lower prices for industrial implementation of CH4 than CO or H2, makes it a very attractive choice.…”

Section: Introductionmentioning

confidence: 99%

Preparing and Optimization of Cerium-Lanthanum-Cobalt Ternary Mixed Oxide as Catalyst for SO<sub>2</sub> Reduction to Sulfur

Khangah

Sarraf

Ebrahim

et al. 2019

e-J. Surf. Sci. Nanotechnol.

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“…Thus, decrease in the total nitrogen content in samples of liquid hydrocarbons obtained as a result of steam gasification (S1-S4) is the one of the main reasons for lower NOx concentration maximum compared to traditional fuel oil. It is also worth noting that the presence of water in S1-S4 samples contributed to the reduction in NOx emissions, due to the formation of additional H-and OHradicals, which can reduce NO and SO2 [46][47].…”

Section: Analysis Of Gas-phase Combustion Productsmentioning

confidence: 99%

Liquid Hydrocarbons Production by the Steam Gasification of Used Tires: Energy Characteristics and Environmental Sustainability

Ларионов¹,

Slyusarskiy²,

Kirgina³

et al. 2021

Preprint

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The technical characteristics of liquid hydrocarbons obtained by steam gasification of the recycled automobile tires were studied as well as the features of their combustion process. Steam gasification of grinded tires was carried out in a tubular reactor using superheated steam with 500°C temperature and 5 kg/h mass flow rate. The obtained characteristics were compared with a traditional liquid fuel oil. The technical characteristics were determined via the standard analytical methods. An ignition and a combustion of liquid hydrocarbon samples were carried out in the combustion chamber at different temperatures of heating medium Tg = 450–700°C. Gas-phase combustion products were analyzed using a flow-through gas analyzer. It was found that liquid hydrocarbons were characterized by a low pour point (-43°C – (-52) °C) and comparable to calorific value of traditional fuel oil (40.56–43.3 MJ/kg). In addition, the studied samples of liquid hydrocarbons were characterized by a lower ignition delay time (by 56 %, on average) and flame burning time (by 30 %, on average). Combustion process of the studied samples (including traditional fuel oil) was accompanied by the formation of micro-explosions.

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“…[11] noted that the activation via microwave-assisted KOH improved the BET surface area of starch-derived spherical carbon from 8.9 to 616.8 m 2 g -1 . [12] also demonstrated that the AC prepared from cotton stalks by microwave-assisted ZnCl 2 showed the high adsorption ability of Activated Carbon from Bagasse by Microwave-Assisted H 3 PO 4 Suthatip SINYOUNG et al http://wjst.wu.ac.th methylene blue. Although the utilization of microwave energy as an activation source can enhance the properties of AC, microwave energy that is too high will lead to the destruction of the pore structure of AC, resulting in inefficiency adsorption [13].…”

Section: Introductionmentioning

confidence: 96%

“…Activated carbon (AC) is well known as a porous material that can adsorb various matters or pollutants in any state. The applications of AC include medical treatment [1], energy storage [2], water and wastewater treatment [3], and flue gas treatment and adsorption [4]. The use of AC is increasing every year as it is widely used in a variety of applications [5].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Activated Carbon from Bagasse by Microwave-Assisted Phosphoric Acid Activation

Sinyoung

Chaiwat

Kunchariyakun

2021

Walailak J Sci & Tech

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This research focuses on the utilization of bagasse as activated carbon (AC) under microwave-assisted phosphoric acid activation. The AC was activated using various frequencies of microwave energy combined with phosphoric acid before the carbonization process. Results indicated that the AC obtained from bagasse under microwave-assisted phosphoric acid had improved properties, i.e. fixed carbon, surface area, and iodine adsorption capacity. However, the loss of AC properties could be attributed to microwave energy exceeding a limit of 800 W. The optimum activated condition in this research was the use of microwave energy 500 W assisted phosphoric acid, which had fixed carbon, surface area, and iodine adsorption capacity at 88.34 ± 0.67 %, 781 m2/g, and 852 ± 6.0 mg/g, respectively. HIGHLIGHTS Microwave energy and phosphoric acid is applied to pretreat bagasse Bagasse pretreatment by microwave-assisted H3PO4 enhances the properties of AC Optimum condition is pretreatment by phosphoric acid and microwave energy at 500 W GRAPHICAL ABSTRACT

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Reduction of SO 2 to elemental sulfur with H 2 and mixed H 2 /CO gas in an activated carbon bed

Cited by 69 publications

References 22 publications

Preparing and Optimization of Cerium-Lanthanum-Cobalt Ternary Mixed Oxide as Catalyst for SO<sub>2</sub> Reduction to Sulfur

Preparing and Optimization of Cerium-Lanthanum-Cobalt Ternary Mixed Oxide as Catalyst for SO<sub>2</sub> Reduction to Sulfur

Liquid Hydrocarbons Production by the Steam Gasification of Used Tires: Energy Characteristics and Environmental Sustainability

Preparation of Activated Carbon from Bagasse by Microwave-Assisted Phosphoric Acid Activation

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