Removal of H2S from coal gas: effect of various parameters on the desulfurization efficiency

This paper explores the reasons why artificial or mineral sources of nitrogen, which were more readily available in Britain than in other European countries, were only slowly adopted by farmers in the decades prior to and during the First World War. It considers why nitrogen in the form of sulphate of ammonia, a by-product of coal-gas (town-gas) manufacture, was increasingly exported from Britain for use by German farmers. At the same time Britain was attempting to monopolise foreign supplies of Chilean nitrate, which was not only a valuable source of fertiliser for agriculture but also an essential ingredient of munitions production. The article also investigates the reasons why sulphate of ammonia was not more widely used to raise agricultural production during the First World War, at a time when food shortages posed a major threat to public morale and commitment to the war effort.

Download Full-text

Comprehensive screen the lead and other toxic metals in total environment from a coal-gas industrial city (NW, China): Based on integrated source-specific risks and site-specific blood lead levels of 0–6 aged children

Chemosphere ◽

10.1016/j.chemosphere.2021.130416 ◽

2021 ◽

Vol 278 ◽

pp. 130416

Author(s):

Yuhan Cao ◽

Xiaoping Li ◽

Feng He ◽

Xuemeng Sun ◽

Xu Zhang ◽

...

Keyword(s):

Toxic Metals ◽

Blood Lead ◽

Blood Lead Levels ◽

Site Specific ◽

Nw China ◽

Coal Gas ◽

Industrial City ◽

Lead Levels ◽

Total Environment

Download Full-text

Effect of cobalt (nickel) oxide on the properties of zinc–titanium sorbents for high temperature desulphurization of model coal gas

Brazilian Journal of Chemical Engineering ◽

10.1007/s43153-021-00129-y ◽

2021 ◽

Author(s):

M. Chomiak ◽

J. Trawczyński ◽

M. Zawadzki

Keyword(s):

High Temperature ◽

Sorption Capacity ◽

Catalytic Effect ◽

Mixed Oxides ◽

Mixed Metal Oxides ◽

Coal Gas ◽

Cobalt Nickel ◽

Texture Structure ◽

Cobalt Nickel Oxide ◽

Co Doped

AbstractZn–Ti–Co(Ni) sorbents for H2S removal from model hot coal were prepared and characterized. Effects of cobalt (Co) and nickel (Ni) on the sorbents texture, structure, H2S sorption capacity and regeneration properties were determined. TiO2 formed mixed metal oxides with CoO and NiO in the fresh sorbents, while TiO2 and nanocrystalline sulfides of Zn, Co, Ni were found in sulphided ones. The oxidative regeneration of sulphided sorbents re-formed mixed oxides. Sorption capacity of studied materials increased along with an increase of the amount of added Co (Ni) and also with the number of work cycles. Co-doped Zn–Ti materials adsorbed up to 244% more sulfur than these of Zn–Ti, while Ni-doped materials adsorbed ca. twice more H2S than the corresponding Co-doped sorbents. The addition of Co (Ni) decreased the temperature of ZnS oxidation. The catalytic effect of the Co (Ni) oxides on the oxidation of ZnS was suggested.

Download Full-text

Design and characteristic analysis of vibration feeding system for coal-gas dust-removal medium

Clean Energy ◽

10.1093/ce/zkaa021 ◽

2020 ◽

Author(s):

Bing Liu ◽

Lixin He ◽

Xianglong Zhao ◽

Qiang Qin ◽

Yi Guo

Keyword(s):

Control Unit ◽

Dust Removal ◽

Feeding System ◽

Characteristic Analysis ◽

Coal Gas ◽

Measurement Variation ◽

Gasification Process ◽

Valve Opening ◽

Design Requirements ◽

Design Factors

Abstract A vibration feeder is a piece of equipment for rationing and conveying powder, particle and block materials. In order to test the regeneration performance of de-dusting medium for high-temperature coal gas, a set of de-dusting medium-feeding systems was designed quantitatively. The de-dusting medium-feeding system is used in the gasification process for cleaning coal gas. The system is mainly composed of a hopper unit, control unit and feeding unit. In order to optimize the feeding stability of the coal-gas dust-removal medium vibration feeding system, the setting and scope of the following design factors and operating factors are investigated. Specifically, it includes the influence of gate-valve-opening adjustment of the control unit on the feeding stability of a vibrating feeding system; the influence of the gap size of the dipleg of the control unit on the feeding sensitivity of the vibration system; the influence of the particle size of the de-dusting medium on the operating range of the vibrating feeding system; the influence of the digitization of the working-current indicator of electromagnetic vibrating feeders on measurement variation and the process variation of a vibration feeding system. This vibration feeding system can realize the function of precise and quantitative feeding of the de-dusting medium, which can meet the design requirements of subsequent experimental research.

Download Full-text