Investigation on the simultaneous removal of COS, CS2and O2from coke oven gas by hydrogenation on a Pd/Al2O3catalyst

Kamp, Eva; Thielert, Holger; Morstein, Olaf von; Kureti, Sven; Schreiter, Norman; Repke, Jens‐Uwe

doi:10.1039/c9cy02579k

Cited by 26 publications

(11 citation statements)

References 50 publications

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“…Alumina, as a well-known industry catalyst, has been considered effective for the hydrolysis of COS in view of its abundant basic active sites, favorable surface areas, and low cost. − However, a conventional alumina catalyst always exhibits poor sulfate resistance, resulting in an abrupt deactivation. This is mainly due to the sulfur/sulfate deposition and contamination, resulting in the loss of active sites and pore blocking.…”

Section: Introductionmentioning

confidence: 99%

Catalysts of Ordered Mesoporous Alumina with a Large Pore Size for Low-Temperature Hydrolysis of Carbonyl Sulfide

Jin

Qi-chao

et al. 2021

Energy Fuels

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Carbonyl sulfide (COS) generated from various chemical and metallurgical industry sectors has been receiving considerable attention due to its environmental impact and threat to production chains. The catalytic hydrolysis of COS has been considered an economic way for converting the unremovable COS into H 2 S that subsequently can be easily removed through the mature wet or dry desulfurization process. Searching for an effective catalyst with stable activity is always crucial for COS hydrolysis. In this study, alkali-free ordered mesoporous Al 2 O 3 with a larger pore size, incorporated with Ni, Cu, or Fe as an additive, and synthesized via a one-pot approach has been investigated for the catalytic hydrolysis of COS at low temperatures. It has been demonstrated that alumina with ordered mesoporous structures exhibits significant catalytic activity over COS hydrolysis whose activity improved further when incorporated with transition metals. More importantly, the enlargement of mesopore size for all the catalysts is critical for maintaining their catalytic performance. By optimizing the pore size and the type of additive, a highly active and stable catalyst of Ni-containing mesoporous Al 2 O 3 with a large pore size has been established, which exhibits a long-term COS conversion above 95% and strong sulfur resistance. With the help of various characterization techniques, the details of the hydrolysis reaction, as well as the sulfur poisoning mechanism, have been revealed. It is envisaged that the synthesized catalyst of alkali-free ordered mesoporous Al 2 O 3 holds great application potential for the catalytic hydrolysis of COS in practical industrial applications.

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Section: Introductionmentioning

confidence: 99%

Catalysts of Ordered Mesoporous Alumina with a Large Pore Size for Low-Temperature Hydrolysis of Carbonyl Sulfide

Jin

Qi-chao

et al. 2021

Energy Fuels

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“…Industrial catalysts are mostly prepared by impregnating metal components directly into a γ-Al 2 O 3 support. Kamp E. et al 48 selected Pd/Al 2 O 3 to completely convert COS into H 2 S at 200 °C, and the results showed that COS dissociated at the Pd site to form CO and S adsorbents, and COS would also adsorb onto the alumina support, thereby forming HSCO 2− . Subsequently, HSCO 2− reacts with hydroxide surface groups to form carbon dioxide and hydrogen sulfide.…”

Section: Bfg Desulfurization Application and Research Trendsmentioning

confidence: 99%

Research progress on adsorption and separation of carbonyl sulfide in blast furnace gas

Wang

Wei

et al. 2023

RSC Adv.

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“…Moreover, the presence of heavier hydrocarbons, e.g., benzene that was produced in toluene conversion, may lead to accelerated saturation of absorbents/adsorbents as the heavy organic compounds can be easily separated along with sulfur compounds [43,44]. One of the solutions might be hydrodesulfurization (HDS), which would transform carbonyl sulfide, carbon disulfide, and sulfur dioxide back into hydrogen sulfide with the use of hydrogen and CoMo or NiMo catalysts [41]. This would create the possibility to apply typical hydrogen sulfide removal methods, yet they still would be somehow limited by the presence of heavier hydrocarbons.…”

Section: Hydrogen Sulfide Conversionmentioning

confidence: 99%

Warm Plasma Application in Tar Conversion and Syngas Valorization: The Fate of Hydrogen Sulfide

Wnukowski

Moroń

2021

Energies

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Warm plasma techniques are considered a promising method of tar removal in biomass-derived syngas. The fate of another problematic syngas impurity—hydrogen sulfide—is studied in this work. It is revealed that processing simulated syngas with a microwave plasma results in hydrogen sulfide conversion. For different gas flow rates (20–40 NLPM) and hydrogen sulfide concentrations ranging from 250 ppm to 750 ppm, the conversion rate varies from ca. 26% to 45%. The main sulfur-containing products are carbon disulfide (ca. 30% of total sulfur) and carbonyl sulfide (ca. 8% of total sulfur). Besides them, significantly smaller quantities of sulfates and benzothiophene are also detected. The main components of syngas have a tremendous impact on the fate of hydrogen sulfide. While the presence of carbon monoxide, methane, carbon dioxide, and tar surrogate (toluene) leads to the formation of carbonyl sulfide, carbon disulfide, sulfur dioxide, and benzothiophene, respectively, the abundance of hydrogen results in the recreation of hydrogen sulfide. Consequently, the presence of hydrogen in the simulated syngas is the main factor that determines the low conversion rate of hydrogen sulfide. Conversion of hydrogen sulfide into various sulfur compounds might be problematic in the context of syngas purification and the application of the right technique for sulfur removal.

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Investigation on the simultaneous removal of COS, CS₂and O₂from coke oven gas by hydrogenation on a Pd/Al₂O₃catalyst

Abstract: Simultaneous hydrogenation of organosulfur compounds and O2 by Pd/Al2O3 catalyst was studied in a fixed bed reactor and by DRIFTS.

Cited by 26 publications

References 50 publications

Catalysts of Ordered Mesoporous Alumina with a Large Pore Size for Low-Temperature Hydrolysis of Carbonyl Sulfide

Catalysts of Ordered Mesoporous Alumina with a Large Pore Size for Low-Temperature Hydrolysis of Carbonyl Sulfide

Research progress on adsorption and separation of carbonyl sulfide in blast furnace gas

Warm Plasma Application in Tar Conversion and Syngas Valorization: The Fate of Hydrogen Sulfide

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