The Application of Solid Selective Catalytic Reduction on Heavy-Duty Diesel Engine

Li, Jiaqiang; Ge, Yunshan; He, Chuangxin; Tan, Jianwei; Peng, Zihang; Li, Zidi; Chen, Wei; Wang, Shijie

doi:10.4271/2017-01-2364

Cited by 4 publications

(2 citation statements)

References 14 publications

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“…A solid SCR system that relied upon strontium ammine chloride (Sr(NH 3 ) 8 Cl 2 ) as a reducing agent precursor for heavy-duty diesel engine NOx reduction was developed by Li et al 56 European stationary cycle (ESC), European transient cycle (ETC), world harmonized transient cycle (WHTC), and PEMS tests were used to evaluate and compare the deNOx performance of the presented system with the urea SCR system. The pressure of dosed ammonia was controlled at 3.4 bar by an ammonia-dosing control unit (ACU) by varying the heating power.…”

Section: Metal Halide Ammines-based Solid Scr Technologymentioning

confidence: 99%

A review of solid SCR systems as an alternative for NOx reduction from diesel engines

Raza,

Woo,

Kim

2023

International Journal of Engine Research

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Several NOx reduction technologies have been developed to alleviate the impact of NOx emissions on the environment and meet the more stringent upcoming emission legislation. Although UWS is the most commonly used NOx reduction technology, it has various issues listed in this article. Several alternative technologies based on solid materials as a gaseous ammonia source are developed to eradicate these issues. This article reviewed the solid SCR systems currently being developed as an alternative to UWS for deNOx applications. Furthermore, the chemistry of the various ammonia storage materials used in these systems and their potential to produce gaseous ammonia for use in SCR have been evaluated. Furthermore, the deNOx performance of ammonium salts-based and metal ammine chlorides-based solid SCR systems have been evaluated. Besides, we have discussed various numerical modeling and simulation approaches applied to develop these solid SCR systems. Due to gaseous ammonia injection solid SCR systems offer better NOx conversion efficiency compared with UWS systems, especially at low exhaust gas temperatures. The authors believe this article will be helpful for future studies in this field to further develop and establish these solid SCR systems as a viable alternative deNOx technology.

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Section: Metal Halide Ammines-based Solid Scr Technologymentioning

confidence: 99%

A review of solid SCR systems as an alternative for NOx reduction from diesel engines

Raza,

Woo,

Kim

2023

International Journal of Engine Research

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“…Solid ammonium salts are the best alternative to urea solution that act as ammonia carriers that are stable and have higher ammonia release per unit mass. The different ammonia cursors for solid-SCR (SSCR) are solid urea, ammine chloride of strontium (Li et al 2017;Liu and Tan 2020) and calcium, ammonium carbonate, and ammonium carbamate (Kurien and Srivastava 2019). Ammonium carbonate (ACN) and ammonium carbamate (ACM) are the most preferred salts due to their operating temperature range, ease of availability, and storage and can be easily implemented into the current SCR systems (Kim et al 2014;Peitz et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Thermal dissociation kinetics of solid ammonium carbonate for use in NH3-SCR systems

Mohan

Dinesha

2022

Chem. Pap.

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Selective catalytic reduction (SCR) systems using solid ammonia carriers like carbamates, carbonates, etc., have gained interest in the recent past for NOx abatement from compression ignition engines. Solid ammonia carriers have successfully demonstrated their use in SCR systems. In this experimental study, the thermal dissociation study of ammonium carbonate is made using nonisothermal thermogravimetric analysis. Ammonium carbonate is subjected to three heating rates, $$\emptyset$$ ∅ of 2, 4, and 8 K/min. The corresponding highest rates of reaction are obtained at temperatures ($$T_{p}$$ T p ) of 96, 118, and 128 °C, respectively. At these points, the mass of the samples has been reduced to 1/3rd of the initial mass. From the Arrhenius plots, the average activation energy obtained is 77.39 kJ/mol which is 15% higher than that of ammonium carbamate. An expression for $$T_{p}$$ T p as a function of activation energy, $$\emptyset$$ ∅ , and order of the reaction is developed using kinetic model. The model can predict the temperatures at which the reaction rates are maximum for a given heating rate.

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Investigation of an ammonium carbamate–based SCR system for NOx reduction in diesel engines under transient conditions

Raza

Woo

Kim

2022

Energy

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The Application of Solid Selective Catalytic Reduction on Heavy-Duty Diesel Engine

Cited by 4 publications

References 14 publications

A review of solid SCR systems as an alternative for NOx reduction from diesel engines

A review of solid SCR systems as an alternative for NOx reduction from diesel engines

Thermal dissociation kinetics of solid ammonium carbonate for use in NH3-SCR systems

Investigation of an ammonium carbamate–based SCR system for NOx reduction in diesel engines under transient conditions

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