Category Archives: Chemical

How to Remove Hydrogen Sulfide

Posted by on November 14, 2019 Comments Off on How to Remove Hydrogen Sulfide

Though not exactly very dangerous and life-threatening, there is no doubt that hydrogen sulfide in water and other liquids must be removed. It is often considered as a nuisance and when we look at the concentration of this substance in household water, it is should not be too alarming. However, it does spoil the taste of water quite a bit and this is what makes it unfit for drinking and another usage. Water that contains hydrogen sulfide is also referred to as sulfur water. It has a typical rotten egg smell and you can perhaps notice it when you are running hot water. This water has the potential of discoloring tea, coffee, and other beverages and it also could alter the appearance and the taste of cooked foods. We also look at other possible areas of damage and also try and find out how to remove Hydrogen Sulfide from the water.

Corroding Properties

 We need to understand the hydrogen sulfide has very notorious corroding properties and therefore it could cause damage to plumbing metals such as steel, iron, brass, and copper. It could also lead to corrosion to exposed metal parts as far as washing machines are concerned. It also has the potential of damaging other appliances that use water quite extensively. When corrosion of iron and steel in water takes place, we have something known as black water syndrome. This can damage and discolor copper, brass and other silverware utensils. It could also reduce the efficiency of water softeners. Hence, all these possibilities must be kept in mind so that you can find the right solution to the problem.

 Have Water Tested

 To determine the right treatment method, the first thing is to find out how much hydrogen sulfide is there in the water supply. We have to understand that hydrogen sulfide is a gaseous substance and it can get dissolved in water and also can escape from it quite easily. Therefore the concentration of this gaseous substance in water should be done using the right methods. The test should show the level of concentration of hydrogen sulfide. When sewage pollution is the cause of such contamination, the water must also be tested for bacteria and other harmful organisms.

 How to Treat It

  •  The treatment methods would depend on the levels of concentration and in very minor cases, the use of activated carbon filtration could solve the problem.
  • When the levels are slightly higher then you may have to go in for aeration and this again is an effective treatment method. However, when aeration is being done, the water must be protected from possible bacterial and germicidal contamination and the risk of freezing should also be taken care of.
  • If the levels of contamination are quite high you may have to use an iron removal filter and the use of manganese greensand could be a good solution. The use of chlorination is also another way by which the menace and nuisance of hydrogen sulfide can be avoided.

 Summing Up

 While there is no big danger associated with hydrogen sulfide removal, if the concentration is above normal, then it should be addressed as soon as possible using the best possible removal methods.

 

How To Remove Sulfur From Hydrocarbon Gas

Posted by on May 20, 2019 Comments Off on How To Remove Sulfur From Hydrocarbon Gas

There is no doubt that absorption is one of the most commonly followed and simple processes that is used in water treatment, production of various specialty chemicals, separation of hydrogen sulfide gas removal of trace impurities. Though absorbents are quite commonly used, they have not yet been fully or broadly adopted when it comes to the refining of liquid carbon streams. However, when we spend some time and have a broader perspective about techniques that could help in removing sulfur and other trace impurities, there are quite a few things that fall in place. Over the years, engineers and scientists have been able to gather the right knowledge and use the right technology. This goes a long way in having the best levels of controls of the various properties of interfaces and surfaces that lead to the design of raw materials at the molecular levels. It also would be pertinent to mention here that technologies pertaining to absorption, capacity, kinetics, and selectivity also show significant improvement. Hence, there are reasons to believe that widespread usage of these technologies over the next few years and decades is very much possible according to experts. It, therefore, would be interesting to have a closer look at the above from various perspectives for the information and knowledge of our readers.

Can Olefin Character Be Preserved

If a refiner is keen on preserving the olefin character or the aromatic attributes of a stream, then it is important that the right compounds or applications be used as far as absorption is concerned. Further, such methods must ensure the h2s removal from biogas or concentrated organo-sulfur or organo-nitrogen compounds. When we use traditional methods of hydro-treating it could lead to saturation of olefins and also it could have the same impact on some types of aromatic compounds. Hence, there is a need to look at other options also. There are also situations where zeolites (which are microporous coordination polymers and activated carbons) have led to competition for the various absorption sites. This also has led to the decreased presence of the sulfur compound. But when it comes to olefins and aromatics with nitrogen, there is not much information available.

A Look At The Separation Process Overview

It would be interesting to look at the separation process. It basically uses two columns and this enables continuous absorption processing and helps to separate the contaminated feeds. One of the columns runs in the absorption mode. This column removes heteroatom compounds that are embedded in the liquid hydrocarbon stream. The other column runs through the regeneration mode, and this removes the absorbed heteroatom compounds that get regenerated in the bed.

When it is absorption mode, the feed oil moves into the column and it gets over the catalyst absorbent. When this happens, these heteroatom compounds bind themselves to the absorbent. This results in the contaminant-free oil flow out fully free from various compounds and it is well and truly a purified product in more ways than one.

When we are talking about the regeneration mode, the oil feed gets switched and moves to the fresh column. The column that is spent and impure is flushed with the help of a solvent and it leads to removal of oil that is fully residue-treated.

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