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Related Concept Videos

Otto and Diesel Cycle01:27

Otto and Diesel Cycle

An Otto engine is a four-stroke engine that uses a mixture of gasoline and air as the working fuel. The fuel is injected into the cylinder, and the piston is moved completely down so that the cylinder is at maximum volume. By moving the piston up, adiabatic compression takes place. The spark plug ignites the gasoline-air mixture, and the burning fuel adds heat to the system at a constant volume. The heated mixture expands adiabatically and gets further cooled by exhausting heat, and this cyclic...
Internal Combustion Engine01:20

Internal Combustion Engine

The internal combustion engine is a heat engine that uses the byproducts of combustion as the working fluid instead of using a heat transfer medium to transfer heat. The combustion is done in a way that produces high-pressure combustion products that can be expanded through a turbine or piston to create work. Internal combustion engines can again be categorized into three kinds: (1) spark ignition gasoline engines, most commonly used in automobiles, (2) compression ignition diesel engines that...
Microbial Fuel Cells01:23

Microbial Fuel Cells

Microbial fuel cells (MFCs) are bioelectrochemical devices that generate electricity by exploiting the metabolic processes of electrogenic bacteria. These systems provide a renewable energy source and serve as an innovative method for treating organic waste, such as wastewater.A typical MFC consists of two chambers: an anoxic (oxygen-free) compartment that houses the bacteria and an oxic (oxygen-rich) compartment that contains oxygen as the terminal electron acceptor. Many MFCs use proton...
Microbial Wastewater Treatment01:30

Microbial Wastewater Treatment

Microbial communities in aquatic ecosystems play a key role in the natural breakdown of contaminants introduced through domestic and industrial effluents. Acting as biological catalysts, these microbes change and mineralize a wide range of organic and inorganic pollutants under different redox conditions.In oxygen-rich surface waters, aerobic heterotrophs lead organic matter breakdown, using oxygen as the terminal electron acceptor to efficiently oxidize substrates to carbon dioxide and water.
Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers.  Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.
Work Done in an Adiabatic Process01:20

Work Done in an Adiabatic Process

Consider the adiabatic compression of an ideal gas in the cylinder of an automobile diesel engine. The gasoline vapor is injected into the cylinder of an automobile engine when the piston is in its expanded position. The temperature, pressure, and volume of the resulting gas-air mixture are 20 °C, 1.00 x 105 N/m2, and 240 cm3 , respectively. The mixture is then compressed adiabatically to a volume of 40 cm3. Note that, in the actual operation of an automobile engine, the compression is not...

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Related Experiment Video

Updated: Jul 13, 2026

Measuring Sub-23 Nanometer Real Driving Particle Number Emissions Using the Portable DownToTen Sampling System
08:59

Measuring Sub-23 Nanometer Real Driving Particle Number Emissions Using the Portable DownToTen Sampling System

Published on: May 22, 2020

[Diesel emission control technologies: a review].

Hong He1, Duan Weng, Xin-Yun Zi

  • 1Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. honghe@rcees.ac.cn

Huan Jing Ke Xue= Huanjing Kexue
|August 7, 2007
PubMed
Summary

This review covers advancements in diesel emission control, focusing on new engine technologies and aftertreatment systems like diesel particulate filters (DPF) and selective catalytic reduction (SCR) for NOx reduction. Future developments in diesel emission control are also explored.

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Implementation of Portable Emissions Measurement Systems (PEMS) for the Real-driving Emissions (RDE) Regulation in Europe
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Combustion Characterization and Model Fuel Development for Micro-tubular Flame-assisted Fuel Cells
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Combustion Characterization and Model Fuel Development for Micro-tubular Flame-assisted Fuel Cells

Published on: October 2, 2016

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Measuring Sub-23 Nanometer Real Driving Particle Number Emissions Using the Portable DownToTen Sampling System
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Published on: May 22, 2020

Implementation of Portable Emissions Measurement Systems (PEMS) for the Real-driving Emissions (RDE) Regulation in Europe
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Implementation of Portable Emissions Measurement Systems (PEMS) for the Real-driving Emissions (RDE) Regulation in Europe

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Area of Science:

  • Environmental Science
  • Mechanical Engineering
  • Chemical Engineering

Context:

  • Diesel engines remain a significant source of air pollution.
  • Stringent emission regulations necessitate continuous innovation in diesel emission control.
  • Aftertreatment technologies are crucial for meeting modern emission standards.

Purpose:

  • To review current research on diesel emission control technologies.
  • To highlight recent advancements in diesel particulate filters (DPF) and selective catalytic reduction (SCR) for NOx reduction.
  • To explore future research directions in diesel emission control.

Summary:

  • The review examines novel engine designs and aftertreatment systems for reducing diesel emissions.
  • Key focus areas include the latest developments in DPF technology for particulate matter removal and SCR systems for NOx abatement.
  • The study also discusses potential future advancements in the field of diesel emission control.

Impact:

  • Provides a comprehensive overview of the state-of-the-art in diesel emission control.
  • Informs researchers and engineers about current trends and future opportunities.
  • Contributes to the development of cleaner diesel engines and reduced environmental impact.