The developing issue of the present world is a worldwide temperature alteration, which is caused by ozone-harming substance impact. Carbon dioxide has the real commitment towards a worldwide temperature alteration as it is discovered copiously in climate given anthropogenic carbon dioxide outflows and advancement of vent gasses. Businesses are additionally debilitating corrosive gasses (CO2 and H2S) in the earth, which prompts the perilous conditions. To control such conditions lessening of these hurtful gasses is valuable for which ingestion of corrosive gasses is for the most part favoured. Amine gas treating is an appropriate system to complete this work as it expels CO2 and H2S at the same time from petroleum gas streams and also modern gas streams and decontaminate them for local use and solid condition individually. For this purpose, study the best solvent selection for CO2 capture in chemical absorption. In chemical absorption amines solvents are used. Amine is one of the applicant solvents which is utilized for carbon dioxide recuperation from the pipe gas by chemical absorption /desorption process. This research focus on the effect of various amine absorbents, their concentrations, the absorber and stripper section statures and the working conditions on the carbon dioxide recuperation plant for post-combustion carbon dioxide evacuation. For every amine dissolvable, the ideal stages for the absorber and stripper segments, and the ideal absorbent concentration, the ones that give the base conditions for carbon dioxide evacuation is determined by Aspen HYSYS simulation. The results obtained showed that carbon dioxide recuperation with 50 wt. % DGA requires the best ideal conditions for removal of CO2 with the following design and working conditions are 10-organize absorber column and 10-arrange stripper segment, 20.89 m 3 /hr circulation rate of solvent and 2545 kW of reboiler obligation and 100 o C as the regenerator-delta temperature and absorbed 93.6% CO2.

With the growing need and demand for petroleum fuels in the industrial, automotive and domestic sectors, it has become the need of time to address this problem. The important question is, what engineers can do in this regard. There is a simple solution to cater this problem, the production trends worldwide are increasing every year, but still, the demand keeps increasing exponentially. One way is to stress emphasis on reducing the wastage of these precious fuels and, at the same time, implement methodologies and techniques to recover these. The research caters to cope up with the shortage of LPG within Pakistan. Since LPG is a fuel that is being used in the industrial, automotive as well as domestic sector, adequate responsive measures should be taken to meet the market requirements. This research focuses on the technique to recover LPG from refinery off-gases. Since off-gases usually are flared of by most of the refineries leading to potential loss of lighter end fuels like LPG. The article encloses a detailed proposal of a recovery plant that makes use of simple techniques and efficient process accompanied by economical and feasible solutions.

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The significance of sustainable power source has expanded because of environmental change and worldwide cautioning concerns because of its renewing quality. Solar energy is the focal point of numerous examinations due to modern industrial applications and small scale local applications in emerging nations. Solar energy is being bridled, either specifically utilizing photovoltaic or secondarily utilizing concentrated solar power. This study aims to design and fabricate a small scale concentrated solar power (CSP) plant using linear parabolic trough. Linear parabolic trough collector is used because of high efficiency and exceedingly prescribed kind of CSP. The scope of this study is to develop a CSP plant and also study the properties of various thermal fluids and expect the best transfer medium. The study done in this research is based on carrying out a detailed energy balance scheme for a linear parabolic trough collector while observing twenty-six vital design parameters, including the geometric measurements and material properties of concentrator and receiver pipe, thermal fluids properties, and operating conditions. Modeling of the system is carried out for different thermal fluids that are deemed viable for use. It was found that the results obtained from the fabricated parabolic trough CSP were used to verify the model and compare with the theoretical results. The conclusions deduced from this study will help design both small and large scale applications of linear parabolic troughs.

Water is one of the essential resources in the world. Without water, the world cannot survive. Earth is covered by 71% water and 2.5 % coverd by freshwater. Out of 7 billion peoples, only 1.2 billion peoples are getting fresh water for drinking. The scarcity of water exerts strong effects around the world. The world is working to develop appropriate, cost-effective methods to provide high purified water for drinking purposes. Water contains suspended particles, micro-organisms, bacteria, organic and inorganic compounds as impurities. For purification, lots of methods are available which are widely used all around the world. This research is based on the research and development of water treatment plants which is cost- effective and provides safe drinking water for household purposes. Solar de-salination is one of the best energy efficient methods used for water treatment. In this process, solar energy is utilized to purify saline water. Minerals and salts were quickly removed as a brine solution and vapors condensed and collected to get the product. The energy requirement is low as compare to other methods. The construction of the plant was simple and cheap. This process removes 99.5 % of salts from the water. This research is successful in achieving the objectives and goals of getting potable water that meets the standards of WHO. This research also focuses on a large scale for water treatment as it is cost-effective and can reduce the shortage of freshwater around the world.