With all engines, what goes in must come out. If you put in 1kg of fuel and 25kg of air, at the other end the result will be 26kg of exhaust emissions. All the atoms that went in will have come out too, but not necessarily as part of the same compounds they were in before.

The emissions form internal combustion engines burning hydrocarbons can be broken down into four categories:
1. Residues of the intake air: Primary oxygen and nitrogen. As far as we know, these are completely harmless.
2. Products of components in the intake air: The most significant under this heading are the “oxides of nitrogen”, which have varying degrees of toxicity.
3. Products of complete combustion: These comprise carbon dioxide and water vapor, which although non-toxic, are both considered to be greenhouse gases and are therefore implicated in climate change.
4. Products of incomplete combustion: These include carbon monoxide, hydrocarbons, and particulate matter, all of which are toxic.

The toxic substance contained in exhaust gas as it leaves the engine are known as ‘primary pollutants’, but once they have left the engine some of these may react with each other or with other compound present in the atmosphere to create what are known as ‘ secondary pollutants’. Examples of secondary pollutants include ozone, acid rain and photochemical smog.

Proposed Regulatory Framework for DPM.
(Form the Department of Mineral Resources, www.drm.gov.za)

The advised step in approach is detailed as follow:

The 160 μg/m³ (TC) level is however subjected to review should new knowledge on the risks associated with excessive exposure to DPM become available.

Catalytic Converter Pollutant Figure 1.

They are used in lean mixture diesel engines. (Oxidation) converters burn HC and CO molecules with the assistance of a precious-metals wash coat. This process “converts” these harmful gasses into water vapor and carbon dioxide (CO2). It’s important to understand that converters are most effective when used with engines that have a lean air/fuel mix because this condition provides ample oxygen to “burn” the pollutants.

Catalytic converters have reductions off:
– Carbon monoxide (CO) from 85-98% – Hydrocarbons (HC) from 80-95% – Particulate Matter from 20-50%.

an exhaust emission control device that converts toxic gases and pollutants in exhaust gas from an internal combustion engine into less-toxic pollutants by catalyzing.

We offer a range of Catalytic Converters, which are fitted to the customers needs. For example : in Silencers, Incase it with cones, we cab  add falnges as well as Pipe ends, This makes for easy fitting, Bolt on/Off or Camp on/Off.

Diesel Particulate Filter - Particulate Matter

In a theoretically perfect combustion, carbon dioxide, water and nitrogen are the end products.

In reality, the incomplete combustion of diesel fuel results in emissions that include oxides of nitrogen (NOx), carbon monoxide (CO), carbon dioxide (CO2), water (H2O) and unburned hydrocarbons (HC). There are also unburned carbon particles, as well as engine oils, soot and ash particulates, which are known as particulate matter (PM).

The diesel particulate matter (DPM) id the visible cloud of black smoke that appears from engine start-up and continues to appear when engine is running.

Before the advent of Diesel Particulate Filters (DPF’s), soot particles were releases into the atmosphere at the end of the combustion process causing health and air quality problems. DPF’s are fitted after that catalytic converter to trap these particles. DPF filter also play a small part in the reduction off noise between 10-12DB. The diameter of the soot particles are close to 0.09 microns, which are made mainly by carbon and hydrocarbons. The principle of the Diesel Particulate Filter (DPF) is to collect the sooty particles and periodically burn them off. It needs to be noted that the lifespan (operation interval) of the DPF/catalyst combination is between 8000 and 12000 engine hours. The natural combustion of those particles takes place around 550°C. This is known as passive regeneration.

Passive regeneration accurse between 550°C and 600°C degrees. The engine needs to run at these temperatures for a minimum of 60% of engine working time to ensure regeneration, If this regeneration does not occur, there is a build-up of soot which will lead to the backpressure in the exhaust system to rise.

If this situation occurs the DPF filter will need to be removed from the machine and baked at 800°C for 8 hours, all depending on the level of clogging that has accrued. Air is then used to pulse through the filter to remove the remaining ash.

The baking of the DPF filter need to be conducted by Rush Exhaust & Rush Enterprises for the interim, on an exchange base, to reduce costs. Were a retrofit unit can be used.

For every 10 DPF filter in used a recommended 3 Units should be on standby to eliminate any down time, in the production line



Maintenance on the DPF consists of the following:

Baking of the filter consists of the following:

The Lifespan of a Diesel Particulate filter (DPF) and Catalytic Converter is between 8000 and 12000 operating hours, after which it needs to be replaced.

Worldwide emission standards are becoming stricter and require improved Catalyst s and Diesel Particulate filters specific to the market and individual application.

Rush Exhaust & Rush Enterprises provide Catalyst for power generation equipment and stationary applications complying with all current requirements and future limits.

Rush Exhaust & Rush Enterprises develop newest wash coat formulations and innovative catalyst coatings for applications all over the world. With profound knowledge in design and technical expertise, cooperation with OEs and accredited test labs our R&D achieves outstanding performance of the catalysts.

We work closely with our customers in order to meet all their requirements and to satisfy their demands. We continuously target on reduction of catalyst volume and precious metals.

Tailor made Catalyst and Diesel Particulate Filter solutions and completive precious metal amounts combined with our special coatings result in low light-off temperature, high durability and performance of our Catalyst and Diesel Particulate Filters.

Our advanced manufacturing equipment allows coating of standard honeycombs (metallic, wire mesh and cordierite/SiC) as well as substrates with structured designs.

Rush Exhaust & Rush Enterprise’s patented IMS design proved significant reduction of PM and all other emissions in many applications. The total PM reduction reached up to 63% in South African and American mining applications with continuous passive regeneration.

Catalytic Converter and Diesel Particulate Filter

New IMS System

Catalytic converter and Diesel Particulate Filter supplier Rush Exhaust and Rush Enterprises introduce a new metal block called IMS. The difference between the new catalytic blocks IMS and the structures currently used in exhaust emission filtration is in fact that emissions are mixed within IMS block and do not flow in between well-defined channels. Exhaust particles move between different layers of the spiral frequently getting in contact with surface active molecules. IMS can be used with gasoline or diesel vehicles

Revised Updated Offer IMS Filter:

As requirements to meet emission reduction going up we offer slightly redesigned IMS filter system.

1. We will modify filters inside structure, by reducing the openings to some point where gases will have more time to interact with catalytic surface. Gases will be spread on 100% of the active area and with added turbulence will reduce all „bad” elements.

2. We will add PGM to current loading and in addition we will add Rhodium as active ingredient to reduce NOx.

3. We will also use more advance wash coat material which will help PGM to be more active which will significantly improve performance of the system.

With all above mentioned changes we can confirm that in general performance of the System will increase by 50-60%. PM will be reduced by 70-80%, NOx by 60% and other gases like CO, HC, and THC will achieve reduction by 80-90%.

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