Synergy Effect of High K-Low Ca-High Si Biomass Ash Model System on Syngas Production and Reactivity Characteristics during Petroleum Coke Steam Gasification

Juntao Wei, Lina Tian, Jiawei Sun, Kuan Ding, Bin Li (), Yonghui Bai, Lipeeka Rout, Xia Liu, Guangyu Xu and Guangsuo Yu ()
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Juntao Wei: Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China
Lina Tian: Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China
Jiawei Sun: Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China
Kuan Ding: Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China
Bin Li: School of Engineering, Anhui Agricultural University, Hefei 230036, China
Yonghui Bai: State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan 750021, China
Lipeeka Rout: Department of Chemistry, Madanapalle Institute of Technology & Science, Madanapalle 517325, Andhra Pradesh, India
Xia Liu: National Engineering Research Center for Large-Scale Coal Gasification and Coal based New Materials, East China University of Science and Technology, Shanghai 200237, China
Guangyu Xu: Shandong Energy Group Co., Ltd., Jinan 250101, China
Guangsuo Yu: State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan 750021, China

Energies, 2024, vol. 17, issue 18, 1-16

Abstract: The synergy effect of high K-low Ca-high Si biomass ash-based model system (BAMS) on the synthesis gas output and reaction characteristics of petroleum coke (PC) steam gasification process was studied using three biomass ash (BA) components, KCl, SiO 2 , and CaCO 3 , which were used as the model compounds. In the ternary model system, the steam gasification experiment of PC was conducted using a fixed bed reactor and gas phase chromatography. The synergistic effects of binary and ternary components in the ternary model system on the gasification of PC were obtained. These investigations were based on the data from the gas analysis and examined the gasification reaction process, syngas release behavior, and reaction characteristics. This study examined the effects of binary and ternary components in the ternary model system on the evolution of semi-char structure during PC gasification. This correlation revealed the synergistic effect of the model system on PC gasification. Scanning electron microscope (SEM) and Raman spectroscopy were used to characterize the structure and surface microstructure of the gasification semi-char. The results showed that the yields of different gases in the ternary model system were in H 2 > CO > CO 2 . Compared with single PC gasification, the yields of H 2 , CO, syngas, and carbon conversion were increased by 29.42 mmol/g, 20.40 mmol/g, 56.68 mmol/g, and 0.35, respectively. All other components in the ternary model system with high K-low Ca-high Si demonstrated catalytic effect, except for SiO 2 and the Ca-Si system, which showed inhibitory effects on syngas release and reaction features. Integrating SEM and Raman spectroscopic analyses, it was elucidated that CaCO 3 and KCl diminished the degree of graphitization in semi-char through interactions with the carbonaceous matrix. This phenomenon facilitated the gasification process and exhibited a synergistic effect. Secondly, SiO 2 will react with CaCO 3 and KCl, producing inert silicates and inactivating these compounds, leading to the decline of catalysis.

Keywords: K-Ca-Si ternary system; petroleum coke; steam gasification; biomass ash; syngas production; synergy effect; reactivity characteristics (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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