Simultaneous NO/CO2 removal by Cu-modified biochar/CaO in carbonation step of calcium looping process

Zhang, Wan; Li, Yingjie; Li, Boyu; Wang, Yuzhuo; Qian, Yuqi; Wang, Zeyan

doi:10.1016/j.cej.2019.123659

Cited by 27 publications

(3 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Large amounts of by-product CO 2 produced by SRE courses are commonly regarded as the primary cause of hydrogen purity degradation, while intolerable greenhouse issues abound. [158,159] As a result, to produce high hydrogen output, it is preferable to remove CO 2 in situ [149] and modify the reaction path accordingly according to LeChatelier's Principle, [160] (Eq ( 16)). As illustrated in the global reaction Eq.…”

Section: Sorption Enhanced Steam Reforming Of Ethanolmentioning

confidence: 99%

Catalytic Steam Reforming of Ethanol to Produce Hydrogen: Modern and Efficient Catalyst Modification Strategies

El‐Salamony

2023

ChemistrySelect

View full text Add to dashboard Cite

Hydrogen is regarded as one of the most promising renewable energy that carriers with a high heating value for replacing fossil fuels and meeting clean energy requirements. Steam reforming has shown considerable promises in the creation of hydrogen. Many studies on catalytic steam reforming of ethanol have been published. Hence, developing efficient and stable catalysts capable of producing large H2 yields and ethanol conversion is a crucial step. Nickel is an essential industrial catalyst because it enhances hydrogenation and dehydrogenation reactions by promoting the scission of C−C bonds. Many studies have been conducted by employing noble metal‐based catalysts to reduce coke deposition and enhance metal stability against sintering since they are known to successfully break the C−C bond, resulting in less carbonaceous deposits and hence more stable catalysts. To avoid carbon production, alkaline promoters, and bimetallic heterogeneous catalysts are commonly utilized in catalysis. However, because huge amounts of by‐product CO2 produced by SRE courses are usually regarded as the primary cause of hydrogen purity degradation, it is recommended to remove CO2 in‐situ to achieve high hydrogen production.

show abstract

Section: Sorption Enhanced Steam Reforming Of Ethanolmentioning

confidence: 99%

Catalytic Steam Reforming of Ethanol to Produce Hydrogen: Modern and Efficient Catalyst Modification Strategies

El‐Salamony

2023

ChemistrySelect

View full text Add to dashboard Cite

show abstract

“…To achieve such an ambitious target, key supply-side technologies include novel energy-storage systems, carbon capture and utilization (CCUS) and zero-carbon electricity production are proposed [3]. Among these, CCUS using various hightemperature solid sorbents (hydrotalcites [4], MgO-based sorbents [5,6], ceramic materials [7], and calcium oxides [8][9][10]), have been considered as promising approaches for mitigating CO2 emissions from the top-emitting industries, namely: power plants, cement, iron & steel, and chemicals & plastics owing to their potential for increased useful energy production and decreased operating costs [11]. Moreover, these high-temperature sorbents are suitable for sorption enhanced methane reforming processes by shifting the thermodynamic equilibrium towards the production of high H2 yields, such as in the Sorption Enhanced Steam Methane Reforming (SESMR), the Sorption Enhanced Chemical Looping Reforming of Methane (SE-CL-RM), and the Super-Dry Chemical Looping Reforming of Methane (SD-CL-RM) [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Molten shell-activated, high-performance, un-doped Li4SiO4 for high-temperature CO2 capture at low CO2 concentrations

Wang

Clough

et al. 2021

Chemical Engineering Journal

View full text Add to dashboard Cite

Lithium orthosilicate (Li4SiO4) represents a potential class of hightemperature sorbents for CO2 capture in power plants and sorption enhanced methane reforming to produce H2. However, conventional wisdom suggests that pure Li4SiO4 would have extremely slow sorption kinetics at realistic low CO2 concentrations. Here, we report the opposite result: using a simple and cost-effective glucose-based mild combustion procedure, an unusually efficient and pure form of Li4SiO4 (MC-0.6) was synthesized to achieve a maximum uptake capacity of 35.0 wt.% at 580 °C for CO2 concentrations under 15 vol.% and maintained this capacity over multiple cycles. The characterization results showed that highly porous nano-agglomerate-like (50-100 nm) morphologies were apparent and ensured a rapid surface-sorption of CO2. In this process, a macroporous nano-sized Li2SiO3 cover on the melt layer of Li2CO3 was

show abstract

“…It is superior in terms of NO x reduction efficiency, but it is accompanied by expensive operation costs and ammonia leakage. Therefore, quite a few scholars focus on reducing the initial formation of NO x by low-NO x combustion techniques − to avoid employing SCR technique or to minimize its operation cost.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Coal-Nitrogen Release and NO_x Evolution in Oxygen-Enriched and Deep-Staging Combustion

et al. 2021

View full text Add to dashboard Cite

Oxygen-enriched and deep-staging (OE and DS) combustion has drawn increasing attention due to its superior nitrogen oxide reduction efficiency and combustion efficiency. To clarify the NO x generation and burnout characteristics of coal in OE and DS combustion, the effects of temperature, oxygen concentration, and stoichiometric ratio in the fuel-rich zone (SR1) on conversions of coal nitrogen and char in fuel-rich (FR) and fuel-lean (FL) zones were experimentally studied in a drop-tube furnace. The results show that the decrease of SR1 leads to a dramatic decrease of NO x in the FR zone but an increase of NO x in the FL zone. When the SR1 is less than 0.8, the formation of NO x in the FL zone is much higher than that in the FR zone, which is mainly attributed to the oxidation of char-N in the FL zone. A high temperature promotes the formation of NO x in the FR zone and inhibits the NO x formation in the FL zone. The inhibiting effect of temperature in the FR zone (T 1) on NO x formation in the FL zone is stronger than its promoting effect on NO x formation in the FR zone, which indicates that the reduction of NO x by high temperature is mainly attributed to NO x reduction in the FL zone. The NO x formations in the FR and FL zones can all be remarkably reduced with the rise of oxygen concentration, and the inhibiting effect of O2 concentration on NO x generation in the FL zone is more remarkable. In addition, the FR zone is the main place for the heterogeneous conversion of coal, where the conversion rate of CO and CO2 can reach more than 75%.

show abstract

Simultaneous NO/CO2 removal by Cu-modified biochar/CaO in carbonation step of calcium looping process

Cited by 27 publications

References 45 publications

Catalytic Steam Reforming of Ethanol to Produce Hydrogen: Modern and Efficient Catalyst Modification Strategies

Catalytic Steam Reforming of Ethanol to Produce Hydrogen: Modern and Efficient Catalyst Modification Strategies

Molten shell-activated, high-performance, un-doped Li4SiO4 for high-temperature CO2 capture at low CO2 concentrations

Experimental Study on Coal-Nitrogen Release and NO_x Evolution in Oxygen-Enriched and Deep-Staging Combustion

Contact Info

Product

Resources

About

Simultaneous NO/CO2 removal by Cu-modified biochar/CaO in carbonation step of calcium looping process

Cited by 27 publications

References 45 publications

Catalytic Steam Reforming of Ethanol to Produce Hydrogen: Modern and Efficient Catalyst Modification Strategies

Catalytic Steam Reforming of Ethanol to Produce Hydrogen: Modern and Efficient Catalyst Modification Strategies

Molten shell-activated, high-performance, un-doped Li4SiO4 for high-temperature CO2 capture at low CO2 concentrations

Experimental Study on Coal-Nitrogen Release and NOx Evolution in Oxygen-Enriched and Deep-Staging Combustion

Contact Info

Product

Resources

About

Experimental Study on Coal-Nitrogen Release and NO_x Evolution in Oxygen-Enriched and Deep-Staging Combustion