Waste pulp chemical-looping gasification using Ni-modified electroplating sludge as an oxygen carrier

IF 6.4 3区环境科学与生态学 Q2 ENERGY & FUELS Carbon Resources Conversion Pub Date : 2023-06-01 DOI:10.1016/j.crcon.2022.12.002

Genyang Tang , Jing Gu , Guoqiang Wei , Haoran Yuan , Yong Chen

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引用次数: 1

Abstract

Waste pulp (WP) is a typical byproduct of paper industry, and Chemical-looping gasification (CLG) as a recently developed technology is highly suited to dispose high-volatile wastes like WP. In order to make a high-efficiency oxygen carrier (OC) for CLG of WP, the Ni-containing electroplating sludge (NES) was used as the matrix and NiO modification was performed to enhance the hydrogen production in CLG. These resulted in a potentially high-efficiency OC denoted as NNES. Testing CLG of WP was in a fixed-bed reactor at 850 °C by adopting NNES as the OC, injecting 2.4 mL/g(WP) water, and keeping a mass ratio of 1.0 between OC to WP. It produced 1.73 Nm³/kg syngas that has an LHV of 11.9 MJ/Nm³ and a H₂/CO ratio of 3.63. In 10 redox cycles, the syngas yield did not have obvious decrease, but a certain reduction in the activity of NNES was observed. Characterization of the spent NNES revealed that it is the Ni agglomeration and inert silicate generation which reduced the activity of NNES.

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镍改性电镀污泥作氧载体的废纸浆化学循环气化

废纸浆是造纸工业的典型副产物，而化学循环气化技术是近年来发展起来的一项非常适合处理废纸浆等高挥发性废弃物的技术。为制备高效氧载体(OC)，以含镍电镀污泥(NES)为基体，对其进行NiO改性，提高CLG的产氢率。这就产生了一种潜在的高效率OC，称为NNES。在850℃的固定床反应器中，以NNES为OC，注入2.4 mL/g(WP)的水，OC与WP的质量比为1.0，测试WP的CLG。产气量为1.73 Nm3/kg, LHV为11.9 MJ/Nm3, H2/CO比为3.63。在10个氧化还原循环中，合成气产量没有明显下降，但NNES活性有一定的降低。废NNES的表征表明，Ni的团聚和惰性硅酸盐的生成降低了NNES的活性。

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来源期刊

Carbon Resources Conversion Materials Science-Materials Science (miscellaneous)

CiteScore

9.90

自引率

11.70%

发文量

审稿时长

10 weeks

期刊介绍： Carbon Resources Conversion (CRC) publishes fundamental studies and industrial developments regarding relevant technologies aiming for the clean, efficient, value-added, and low-carbon utilization of carbon-containing resources as fuel for energy and as feedstock for materials or chemicals from, for example, fossil fuels, biomass, syngas, CO2, hydrocarbons, and organic wastes via physical, thermal, chemical, biological, and other technical methods. CRC also publishes scientific and engineering studies on resource characterization and pretreatment, carbon material innovation and production, clean technologies related to carbon resource conversion and utilization, and various process-supporting technologies, including on-line or off-line measurement and monitoring, modeling, simulations focused on safe and efficient process operation and control, and process and equipment optimization.

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