Investigation of hydrogen production from model bio-syngas with high CO2 content by water-gas shift reaction

Chu, Hsuanyu; Meng, Aihong; Zhang, Yanguo

doi:10.1016/j.ijhydene.2015.01.170

Cited by 22 publications

(16 citation statements)

References 23 publications

(31 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…For example, when the temperature increased from 400 to 600°C, CO conversion decreased from 45.78% to −6.10% for R = 0.75 (a decrease of 51.88%), and it decreased from 78.18% to 47.74% for R = 0.5 (a decrease of 30.44%). These experimental results are in accord with those reported by Chu et al 29 that when the temperature increased from 450 to 650°C, CO conversion decreased from 65% to 40% for R = 0.5 (a decrease of 25%) and from 75% to 60% for R = 0.25 (a decrease of 15%).…”

Section: Resultssupporting

confidence: 93%

“…Therefore, the formation of carbon and CH 4 is a major concern during WGSR. 33 This study is an extension of previous studies [29][30] and investigates the effects of various CO 2 concentrations on water-gas shift and side reactions for operating parameters. The objective of this study was to investigate the operating parameters that could minimize the negative effects of CO 2 concentration on WGSR.…”

Section: Introductionmentioning

confidence: 97%

“…In addition, the CO 2 concentration of bio‐syngas is very important for an efficient WGSR because bio‐syngas contains a large amount of CO 2 (10‐35 vol.%) owing to the high oxygen content in biomass 28 . Chu et al 29 reported a decrease in CO conversion with increasing bio‐syngas CO 2 content because CO 2 is one of the products of WGSR. To minimize the negative effect of the high CO 2 concentration, they recommended using a GHSV lower than 2500 hours −1 , a reaction temperature of 450°C, and a steam/CO ratio of 3.…”

Section: Introductionmentioning

confidence: 99%

“…Lower GHSV implies a longer reaction time in the reactor. Chu et al 29 reported that a lower GHSV contributes to higher CO conversion and a reduction in the effect of CO 2 on CO conversion.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Effects of bio‐syngas CO ₂ concentration on water‐gas shift and side reactions with Fe‐Cr based catalyst

2020

View full text Add to dashboard Cite

Summary To increase the hydrogen (H2) concentration in bio‐syngas containing carbon dioxide(CO2), water‐gas shift reaction (WGSR) is widely used. In this study, the effects of CO2 concentration on the WGSR and unwanted side reactions were investigated by varying the operating parameters, such as the steam/carbon monoxide (CO) ratio, reaction temperature, and the gas‐hourly space velocity (GHSV). Based on the obtained results, CO conversion and H2 yield decreased with increasing CO2 concentration, especially when the steam/CO ratio was lower than 3. This implies that to minimize the negative effect of CO2 on WGSR, the steam/CO ratio should be 3 or higher. For any CO2 concentration, the highest CO conversion and H2 yield were obtained at a reaction temperature of 400°C. Therefore, the temperature should be precisely controlled at 400°C. As GHSV decreased, the CO conversion approached equilibrium with any CO2 concentration; however, the H2 yield remained unchanged.

show abstract

Section: Resultssupporting

confidence: 93%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effects of bio‐syngas CO ₂ concentration on water‐gas shift and side reactions with Fe‐Cr based catalyst

2020

View full text Add to dashboard Cite

show abstract

“…With the objective of enhancing the reaction performance, the WGS reaction has been studied by many groups using different catalysts, resulting in a substantial literature elucidating the catalysis and reactor design aspects. Some review articles are also available summarizing the effect of various parameters, such as reactants flow rate, temperature, and pressure on WGSR in the presence of catalysts [14][15][16]. Catalyst composition, metal-support interactions, porosity, and surface area effects have been widely reported; however, in our knowledge, a study relating the catalyst nanostructures with WGSR performance is still lacking.…”

Section: Introductionmentioning

confidence: 99%

A review of recent advances in water-gas shift catalysis for hydrogen production

2020

View full text Add to dashboard Cite

The water-gas shift reaction (WGSR) is an intermediate reaction in hydrocarbon reforming processes, considered one of the most important reactions for hydrogen production. Here, water and carbon monoxide molecules react to generate hydrogen and carbon dioxide. From the thermodynamics aspect, pressure does not have an impact, whereas low-temperature conditions are suitable for high hydrogen selectivity because of the exothermic nature of the WGSR reaction. The performance of this reaction can be greatly enhanced in the presence of suitable catalysts. The WGSR has been widely studied due do the industrial significance resulting in a good volume of open literature on reactor design and catalyst development. A number of review articles are also available on the fundamental aspects of the reaction, including thermodynamic analysis, reaction condition optimization, catalyst design, and deactivation studies. Over the past few decades, there has been an exceptional development of the catalyst characterization techniques such as near-ambient x-ray photoelectron spectroscopy (NA-XPS) and in situ transmission electron microscopy (in situ TEM), providing atomic level information in presence of gases at elevated temperatures. These tools have been crucial in providing nanoscale structural details and the dynamic changes during reaction conditions, which were not available before. The present review is an attempt to gather the recent progress, particularly in the past decade, on the catalysts for lowtemperature WGSR and their structural properties, leading to new insights that can be used in the future for effective catalyst design. For the ease of reading, the article is divided into subsections based on metals (noble and transition metal), oxide supports, and carbon-based supports. It also aims at providing a brief overview of the reaction conditions by including a table of catalysts with synthesis methods, reaction conditions, and key observations for a quick reference. Based on our study of literature on noble metal catalysts, atomic Pt substituted Mn 3 O 4 shows almost full CO conversion at 260°C itself with zero methane formation. In the case of transition metals group, the inclusion of Cu in catalytic system seems to influence the CO conversion significantly, and in some cases, with CO conversion improvement by 65% at 280°C. Moreover, mesoporous ceria as a catalyst support shows great potential with reports of full CO conversion at a low temperature of 175°C.

show abstract

Targeting climate‐neutral hydrogen production: Integrating brown and blue pathways with green hydrogen infrastructure via a novel superstructure and simulation‐based life cycle optimization

Lal

You

2022

AIChE Journal

View full text Add to dashboard Cite

This article addresses the sustainable design of hydrogen (H2) production systems that integrate brown and blue pathways with green hydrogen infrastructure. We develop a systematic framework to simultaneously optimize the process superstructure and operating conditions of steam methane reforming (SMR)‐based hydrogen production systems. A comprehensive superstructure that integrates SMR with multiple carbon dioxide capture technologies, electrolyzers, fuel cells, and working fluids in the organic rankine cycle is proposed under varying operating conditions. A life cycle optimization model is then developed by integrating superstructure optimization, life cycle assessment approach, techno‐economic assessment, and process optimization using extensive process simulation models and formulated as a mixed‐integer nonlinear program. We find that the optimal unit‐levelized cost of hydrogen ranges from $1.49 to $3.18 per kg H2. Moreover, the most environmentally friendly process attains net‐zero life cycle greenhouse gas emissions compared to 10.55 kg CO2‐eq per kg H2 for the most economically competitive process design.

show abstract

Investigation of hydrogen production from model bio-syngas with high CO2 content by water-gas shift reaction

Cited by 22 publications

References 23 publications

Effects of bio‐syngas CO ₂ concentration on water‐gas shift and side reactions with Fe‐Cr based catalyst

Effects of bio‐syngas CO ₂ concentration on water‐gas shift and side reactions with Fe‐Cr based catalyst

A review of recent advances in water-gas shift catalysis for hydrogen production

Targeting climate‐neutral hydrogen production: Integrating brown and blue pathways with green hydrogen infrastructure via a novel superstructure and simulation‐based life cycle optimization

Contact Info

Product

Resources

About

Investigation of hydrogen production from model bio-syngas with high CO2 content by water-gas shift reaction

Cited by 22 publications

References 23 publications

Effects of bio‐syngas CO 2 concentration on water‐gas shift and side reactions with Fe‐Cr based catalyst

Effects of bio‐syngas CO 2 concentration on water‐gas shift and side reactions with Fe‐Cr based catalyst

A review of recent advances in water-gas shift catalysis for hydrogen production

Targeting climate‐neutral hydrogen production: Integrating brown and blue pathways with green hydrogen infrastructure via a novel superstructure and simulation‐based life cycle optimization

Contact Info

Product

Resources

About

Effects of bio‐syngas CO ₂ concentration on water‐gas shift and side reactions with Fe‐Cr based catalyst

Effects of bio‐syngas CO ₂ concentration on water‐gas shift and side reactions with Fe‐Cr based catalyst