scholarly journals Tunnel-redesigned O2-tolerant CO dehydrogenase for removal of CO in real flue gas

2021 ◽  
Author(s):  
Suk Min Kim ◽  
Jinhee Lee ◽  
Sung Heuck Kang ◽  
Yoonyoung Heo ◽  
Ji Sook Hanh ◽  
...  
Keyword(s):  
Flue Gas ◽  
Atmospheric Condition ◽  
Value Added ◽  
Steel Mill ◽  
Oxidation Of Co ◽  
Co Dehydrogenase ◽  
Agarose Beads ◽  
Carboxydothermus Hydrogenoformans ◽  
Catalyzed Oxidation ◽  
Converter Gas

Abstract Carbon monoxide dehydrogenase (CODH)-catalyzed oxidation of CO to CO2 provides a promising means of removal of toxic and waste CO from industrial flue gas despite of the lack of active and stable enzymes in the atmosphere. Herein we present rationally and selectively redesigned ChCODH-II (Carboxydothermus hydrogenoformans) variants by engineering gas tunnels in order for O2-tolerant CODHs to catalyze efficient CO oxidation under oxygen (O2). Using the redesigned ChCODH-II A559W and A559H variants showing 42- and 128-fold elevation of O2 tolerance, respectively, complete CO removal was achieved under a near-atmospheric condition. Moreover, these variants efficiently removed CO from industrial flue gas (Linz–Donawiz converter Gas: LDG) discharged from a steel mill despite the high O2 level (13.4%) during successful and repeated reuse after immobilized on Ni-NTA agarose beads. Our study will provide insights into redesigning the transformation of O2-sensitive CODHs into tolerant enzymes for use as workhorses for conversion of toxic or waste gases into safe or value-added chemicals.

Implementing a sustainable photochemical step to produce value-added products in flue gas desulfurization

2022 ◽  
Vol 430 ◽  
pp. 133072
Author(s):  
Raúl E. Orozco-Mena ◽  
Raúl A. Márquez ◽  
Kenya I. Mora-Domínguez ◽  
Virginia H. Collins-Martinez ◽  
Eduardo F. Herrera-Peraza ◽  
...  
Keyword(s):  
Flue Gas ◽  
Value Added ◽  
Flue Gas Desulfurization ◽  
Value Added Products

scholarly journals Energy Conservation Model Based on Genomic and Experimental Analyses of a Carbon Monoxide-Utilizing, Butyrate-Forming Acetogen, Eubacterium limosum KIST612

2015 ◽  
Vol 81 (14) ◽  
pp. 4782-4790 ◽  
Author(s):  
Jiyeong Jeong ◽  
Johannes Bertsch ◽  
Verena Hess ◽  
Sunju Choi ◽  
In-Geol Choi ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Atp Synthesis ◽  
Binding Motif ◽  
Oxidation Of Co ◽  
Co Dehydrogenase ◽  
Content Type ◽  
A Genome ◽  
Eubacterium Limosum ◽  
The One ◽  
Conservation Model

ABSTRACTEubacterium limosumKIST612 is one of the few acetogens that can produce butyrate from carbon monoxide. We have used a genome-guided analysis to delineate the path of butyrate formation, the enzymes involved, and the potential coupling to ATP synthesis. Oxidation of CO is catalyzed by the acetyl-coenzyme A (CoA) synthase/CO dehydrogenase and coupled to the reduction of ferredoxin. Oxidation of reduced ferredoxin is catalyzed by the Rnf complex and Na+dependent. Consistent with the finding of a Na+-dependent Rnf complex is the presence of a conserved Na+-binding motif in thecsubunit of the ATP synthase. Butyrate formation is from acetyl-CoA via acetoacetyl-CoA, hydroxybutyryl-CoA, crotonyl-CoA, and butyryl-CoA and is consistent with the finding of a gene cluster that encodes the enzymes for this pathway. The activity of the butyryl-CoA dehydrogenase was demonstrated. Reduction of crotonyl-CoA to butyryl-CoA with NADH as the reductant was coupled to reduction of ferredoxin. We postulate that the butyryl-CoA dehydrogenase uses flavin-based electron bifurcation to reduce ferredoxin, which is consistent with the finding ofetfAandetfBgenes next to it. The overall ATP yield was calculated and is significantly higher than the one obtained with H2+ CO2. The energetic benefit may be one reason that butyrate is formed only from CO but not from H2+ CO2.

The MnO2/Zeolite NaY Catalyzed Oxidation of CO Emission in Catalytic Converter System

2019 ◽  
Vol 964 ◽  
pp. 199-208 ◽  
Author(s):  
Purwanti Setyaningsih Endang ◽  
Abdul Rachman Rahadian ◽  
Tri Ita Martia Ulva ◽  
Rahmad Widyanto Alvin ◽  
Muhammad Iqbal Rendy ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Reaction Time ◽  
Catalytic Converter ◽  
Oxidation Of Co ◽  
Good Thermal Stability ◽  
Zeolite Nay ◽  
The Public ◽  
Type Iv ◽  
Catalyzed Oxidation ◽  
Co Emission

CO emission is one of biggest problem in environmental sector due to increasing number of motorcycle user in every years. CO is poison gas which directly affects on the public health and earth’s atmosphere. The aim of this research to developed catalyst in catalytic converter system to oxidize CO to CO2 by using MnO2/zeolite NaY. Zeolite NaY was synthesized by using hydrothermal method following by wet impregnation to form MnO2/zeolite NaY, then the composite was characterized by XRD, FTIR, SEM-EDX, N2 physisorption, and catalytic activity oxidation of CO was carried out using 4 tag motorcycle. The XRD result represent zeolite NaY synthetic has similar diffraction peak with zeolite NaY (JCPDS 39-1380), then infrared spectrum exhibit T-O-T at fingerprint area which exhibit vibration of zeolite NaY. Octahedral crystal was successfully observe by using SEM which represent zeolite NaY crystal similar with previous study. N2 physisorp shows that the composite has type IV of isotherm which exhibit the micropore and mesopore was form into material. Then, MnO2/zeolite NaY has good thermal stability as well as catalytic activity for CO oxidation, where the longer reaction time successfully to reduce the concentration of CO. Conversely, CO2 concentration dramatically increase as function of reaction time.

When Carbon Meets CO2: Functional Carbon Nanostructures for CO2 Utilization

2019 ◽  
Vol 19 (6) ◽  
pp. 3148-3161 ◽  
Author(s):  
Lei Liu ◽  
Chang-Ce Ke ◽  
Tian-Yi Ma ◽  
Yun-Pei Zhu
Keyword(s):  
Flue Gas ◽  
Carbon Nanostructures ◽  
Active Sites ◽  
Fossil Fuel ◽  
Mechanical Stability ◽  
Hybrid Composites ◽  
Value Added ◽  
Chemical Compositions ◽  
Carbonaceous Materials

Major fossil fuel consumption associated with CO2 emission and socioeconomic instability has received much concern within the global community regarding the long-term sustainability and security of these commodities. The capture, sequestration, and conversion of CO2 emissions from flue gas are now becoming familiar worldwide. Nanostructured carbonaceous materials with designed functionality have been extensively used in some key CO2 exploitation processes and techniques, because of their excellent electrical conductivity, chemical/mechanical stability, adjustable chemical compositions, and abundant active sites. This review focuses on a variety of carbonaceous materials, like graphene, carbon nanotubes, amorphous porous carbons and carbon hybrid composites, which have been demonstrated promising in CO2 capture/separation and conversion (electrocatalysis and photocatalysis) to produce value-added chemicals and fuels. Along with the discussion and concerning synthesis strategies, characterization and conversion and capture/separation techniques employed, we further elaborate the structure-performance relationships in terms of elucidating active sites, reaction mechanisms and kinetics improvement. Finally, challenges and future perspectives of these carbon-based materials for CO2 applications using well-structured carbons are remarked in detail.

Study on Acceleration of Aqueous Catalyzed Oxidation to Biological Trickling Filter of SO2&NOX in Flue Gas

2014 ◽  
Vol 1010-1012 ◽  
pp. 906-910
Author(s):  
Yan Mei Lei ◽  
Jie Wang ◽  
Pei Shi Sun
Keyword(s):  
Flue Gas ◽  
The Other ◽  
Gas Purification ◽  
Trickling Filter ◽  
Biological Methods ◽  
Catalyzed Oxidation

In this paper, Fe2+、Mn2+、Zn2+、Al3+ were joined in the biological trickling filter circulation fluid. The result indicated that catalyzed oxidation and the biological methods simultaneously purified SO2 and NOx of the flue, the flow amount of import gas was more obvious than the other SO2 and NOx gas purification effect influence. The SO2 and NOx purification mechanism of aqueous catalyzed oxidation and biological law was discussed.

scholarly journals Effects of Flue Gas Addition on the Premixed Oxy-methane Flames in Atmospheric Condition

2015 ◽  
Vol 75 ◽  
pp. 3054-3059 ◽  
Author(s):  
Yueh-Heng Li ◽  
Guan-Bang Chen ◽  
Yei-Chin Chao
Keyword(s):  
Flue Gas ◽  
Atmospheric Condition ◽  
Methane Flames

scholarly journals Effect of Preparation Methods on the Performance of Pt/TiO2 Catalysts for the Catalytic Oxidation of Carbon Monoxide in Simulated Sintering Flue Gas

Catalysts ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 804
Author(s):  
Jianyu Cai ◽  
Zehui Yu ◽  
Jian Li
Keyword(s):  
Particle Size ◽  
Catalytic Activity ◽  
Flue Gas ◽  
Ball Mill ◽  
Water Resistance ◽  
Physical Structure ◽  
Impregnation Method ◽  
Oxidation Of Co ◽  
Preparation Methods ◽  
So2 Adsorption

A series of Pt/TiO2 catalysts were prepared by the impregnation (IM), dry ball mill (DB), or wet ball mill (WB) methods, and their catalytic activity for the oxidation of CO was evaluated. The structure and redox properties of the catalysts were investigated by N2 desorption, XRD, SEM, TEM, XPS, H2-TPR, SO2-TPD, and CO chemisorption analysis. It was determined that the preparation method affects the physical structure of the catalyst and the particle size and dispersion of Pt on the catalyst surface. The catalyst prepared by the impregnation method had a more suitable physical structure than the other catalysts, with a smaller particle size, a higher dispersion of Pt on the surface, and the lowest strength of SO2 adsorption. Pt/TiO2(IM) catalysts presented the best catalytic activity for the oxidation of CO in simulated sintering flue gas at 140 °C, as well as better sulfur and water resistance with simulated sintering flue gas containing 50 ppm of SO2 and 15% water vapor.

scholarly journals Deriving Economic Potential and GHG Emissions of Steel Mill Gas for Chemical Industry

2021 ◽  
Vol 9 ◽  
Author(s):  
Jason Collis ◽  
Till Strunge ◽  
Bernhard Steubing ◽  
Arno Zimmermann ◽  
Reinhard Schomäcker
Keyword(s):  
Global Warming ◽  
Blast Furnace ◽  
Chemical Industry ◽  
Ghg Emissions ◽  
Steel Production ◽  
Value Added ◽  
Replacement Cost ◽  
Steel Mill ◽  
Global Warming Impact ◽  
Blast Furnace Gas

To combat global warming, industry needs to find ways to reduce its carbon footprint. One way this can be done is by re-use of industrial flue gasses to produce value-added chemicals. Prime example feedstocks for the chemical industry are the three flue gasses produced during conventional steel production: blast furnace gas (BFG), basic oxygen furnace gas (BOFG), and coke oven gas (COG), due to their relatively high CO, CO2, or H2 content, allowing the production of carbon-based chemicals such as methanol or polymers. It is essential to know for decision-makers if using steel mill gas as a feedstock is more economically favorable and offers a lower global warming impact than benchmark CO and H2. Also, crucial information is which of the three steel mill gasses is the most favorable and under what conditions. This study presents a method for the estimation of the economic value and global warming impact of steel mill gasses, depending on the amount of steel mill gas being utilized by the steel production plant for different purposes at a given time and the economic cost and greenhouse gas (GHG) emissions required to replace these usages. Furthermore, this paper investigates storage solutions for steel mill gas. Replacement cost per ton of CO is found to be less than the benchmark for both BFG (50–70 €/ton) and BOFG (100–130 €/ton), and replacement cost per ton of H2 (1800–2100 €/ton) is slightly less than the benchmark for COG. Of the three kinds of steel mill gas, blast furnace gas is found to be the most economically favorable while also requiring the least emissions to replace per ton of CO and CO2. The GHG emissions replacement required to use BFG (0.43–0.55 tons-CO2-eq./ton CO) is less than for conventional processes to produce CO and CO2, and therefore BFG, in particular, is a potentially desirable chemical feedstock. The method used by this model could also easily be used to determine the value of flue gasses from other industrial plants.

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