This document provides an introduction to catalysis. It begins by defining catalysis as the acceleration of a chemical reaction by a substance that is not consumed by the reaction and remains chemically unchanged. The document then discusses the history of catalysis, including its discovery in the 19th century and important early contributors like Berzelius, Ostwald, Haber, and Sabatier. It outlines the main types of catalysis as homogeneous and heterogeneous catalysis. Key characteristics of catalytic reactions are also summarized, such as catalysts remaining unchanged, being specific to certain reactions, and not affecting equilibrium. The document concludes by discussing some major applications of catalysis in industries like petroleum production, chemical synthesis, and pollution control.
catalysis and heterogeneous catalysis,
types of catalysis; difference between homo and hetero catalysis;
heterogeneous catalysis; preparation, characterization, supported catalysts, deactivation and regeneration of catalysts, example of drug synthesis
catalysis and heterogeneous catalysis,
types of catalysis; difference between homo and hetero catalysis;
heterogeneous catalysis; preparation, characterization, supported catalysts, deactivation and regeneration of catalysts, example of drug synthesis
this presentation describes ways to enantiomeric product synthesis, hence introducing to chiral catalysts. the temperature effects are discussed with relation to soai autocatalysis. it shows introduction to stereocartography.
It shows the basic facts of catalyst along with its importance in industry along with its long last milestone,its characteristics & application in industry its reaction process and preparation of a solid catalyst.
Introduction
Basis
Importance
Classification
Homogeneous catalysis
Mechanism
Example
Heterogeneous catalysis
Mechanism
Examples
Promoters
Catalytic Poisoning
Autocatalysis
Enzyme catalysis
Enzymes
References
Catalyst: -
The substances that alter the rate of a reaction but itself remains chemically unchanged at the end of the reaction is called a Catalyst.
The process is called Catalysis.
prop-
A catalyst cannot start the reaction by itself.
Catalytic activity increases as surface area of catalyst increases.
Catalysts are thermolabile, this effect is very well pronounced in enzymes.
Catalytic activity is maximum at a catalyst’s optimum temperature.
A catalyst does not alter the position of the equilibrium, instead it helps in achieving the equilibrium faster.
What is catalysis, its type and its applicationLovnish Thakur
This document will give you information about catalysis and type of catalysis like homogenious and heterogenious catalysis and its various application .
CATALYSIS, TYPES OF CATALYSIS FOR CHEMISTRY STUDENTSShikha Popali
CATALYSIS IS A TYPE OF CHEMICAL REACTION. HERE IN THIS PREASENTATION THE CATALYSIS AND ITS TYPES ARE EXPLAINED IN DETAIL WITH ITS ADVANTAGES AND DISADVANTAGES.
this presentation describes ways to enantiomeric product synthesis, hence introducing to chiral catalysts. the temperature effects are discussed with relation to soai autocatalysis. it shows introduction to stereocartography.
It shows the basic facts of catalyst along with its importance in industry along with its long last milestone,its characteristics & application in industry its reaction process and preparation of a solid catalyst.
Introduction
Basis
Importance
Classification
Homogeneous catalysis
Mechanism
Example
Heterogeneous catalysis
Mechanism
Examples
Promoters
Catalytic Poisoning
Autocatalysis
Enzyme catalysis
Enzymes
References
Catalyst: -
The substances that alter the rate of a reaction but itself remains chemically unchanged at the end of the reaction is called a Catalyst.
The process is called Catalysis.
prop-
A catalyst cannot start the reaction by itself.
Catalytic activity increases as surface area of catalyst increases.
Catalysts are thermolabile, this effect is very well pronounced in enzymes.
Catalytic activity is maximum at a catalyst’s optimum temperature.
A catalyst does not alter the position of the equilibrium, instead it helps in achieving the equilibrium faster.
What is catalysis, its type and its applicationLovnish Thakur
This document will give you information about catalysis and type of catalysis like homogenious and heterogenious catalysis and its various application .
CATALYSIS, TYPES OF CATALYSIS FOR CHEMISTRY STUDENTSShikha Popali
CATALYSIS IS A TYPE OF CHEMICAL REACTION. HERE IN THIS PREASENTATION THE CATALYSIS AND ITS TYPES ARE EXPLAINED IN DETAIL WITH ITS ADVANTAGES AND DISADVANTAGES.
Catalysis and its Types
Homogeneous Catalysis
Advantages of Homogeneous Catalysis
History of Homogeneous Catalytic Reactions
Examples of Homogeneous Catalytic Reactions
This slide completely describes you about the stuff include in it and also everything about chemical engineering. Fluid Mechanics. Thermodynamics. Mass Transfer Chemical Engineering. Energy Engineering, Mass Transfer 2, Heat Transfer,
This slide completely describes you about the stuff include in it and also everything about chemical engineeringThis slide completely describes you about the stuff include in it and also everything about chemical engineering. Fluid Mechanics. Thermodynamics. Mass Transfer Chemical Engineering. Energy Engineering, Mass Transfer 2, Heat Transfer,
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
Governing Equations for Fundamental Aerodynamics_Anderson2010.pdf
Catalysis lecture 1
1. Catalysis: An introduction
7/6/2020 1
DR.RABIUL HUSSAIN
Dr.Rabiul Hussain
School of Material Science & Engineering
Jimma Institute of Technolgy, Jimma
University
E-mail: rabiul786@gmail.com
Ph.No. +251-0966882081 (Ethiopia)
+91-9508832510 (India)
4. What is Catalysis?
• The term “catalysis” was introduced as early as 1836 by Berzelius in order
to explain various decomposition and transformation reactions. He
assumed that catalysts possess special powers that can influence the
affinity of chemical substances. [Catalysis(Greek kata = wholly, lein = to
loosen)].
• A definition that is still valid today is due to Ostwald (1895): “a catalyst
accelerates a chemical reaction without affecting the position of the
equilibrium.”
• A catalyst is defined as a substance which alters the rate of a chemical
reaction, itself remaining chemically unchanged at the end of the
reaction. The process is called Catalysis.
5. Catalysis
• A catalyst which enhances the rate of a
reaction is called a Positive catalyst and the
process Positive catalysis or simply Catalysis.
• A catalyst which retards the rate of a reaction
is called a Negative catalyst and the process
Negative catalysis.
• Catalysis is the occurrence, study, and use of
catalysts and catalytic processes
6. Catalysis
• Wilhelm Ostwald proposed
its valid definition in terms
of the concepts of chemical
kinetics: “A catalyst is a
substance which affects the
rate of a chemical reaction
without being part of its
end products”.
• In 1909, Ostwald was
awarded the Nobel Prize in
Chemistry for his
contributions to catalysis.
7. Early History of Catalysis
• Neolithic age ( ~5000B.C.)
Biocatalytic fermentation in wine manufacture.
• 500B.C.
Soap manufacture (hydrolysis of animal fats with
potash lye)
• 1500A.C.
Alchemists formed sulfuric acid by a mysterious
catalytic process
8. Early History of Catalysis
• 1831
Pelegrine Phillips (a Bristol vinegar manufacturer)
obtained the 1stknown patent in catalysis for the
reaction
SO2+ air ® SO3 (Pt sponge as catalyst)
The catalyst used now-a-day is V2O5/ SiO2
• 1835
J.J. Berzelius coined the word “ catalysis”Greek
words “ cata” means “ down”“ lysis ” means “
split” or “ break”
9. Early History of Catalysis
• “ This new force, which is unknown until now, is common to both organic
and inorganic nature. I do not believe that it is a force completely
independent of electrochemical affinities; … It is more convenient to give
this force a separate name. I would therefore call this the catalytic force. I
would furthermore, call the decomposition of substances resulting from
this force catalysis, just as the decomposition of substances resulting from
chemical affinity is called analysis.” Berzelius
10. Early History of Catalysis
• 1909 Ostwald (German) received Nobel Prize
for studies of reaction rate over catalysts.
• 1912 Paul Sabatier (French) received Nobel
Prize for studies of catalytic hydrogenation of
organic compounds.
https://www.nobelprize.org/prizes/chemistry/1909/ostwald/biographical/
https://www.nobelprize.org/prizes/chemistry/1909/ostwald/lecture/
https://www.nobelprize.org/prizes/chemistry/1912/sabatier/lecture/
https://www.nobelprize.org/prizes/chemistry/1912/sabatier/facts/
11. Early History of Catalysis
• 1915
Haber Process: N2+ 3H2 2 NH3(Fe catalyst)
• 1919 Fritz Haber (German) received Nobel Prize
<https://www.nobelprize.org/prizes/chemistry/1918/haber/lecture/>
12. EARLY HISTORY OF CATALYSIS
• 1880 Carl Groebe
– Accidentally broke a thermometer while stirring a
mixture of hot naphthalene and H2SO4
– phthalic anhydride & phthalic acid===dye
chemistry
• 1899
Arrhenius equation k = A exp( -Ea/RT)
• 1903 Ostward process
– 2NH3+ 7/2 O2 2NO2+ 3 H2O (Pt sponge as
catalyst) RESULT=== HNO3industry
13. Early History of Catalysis
• 1920 Sabatier published the 1st book on
catalysis
• 1923 Methanol synthesis
• 1930 Fischer-Tropsch Process:
• 1932 Langmuir (USA) received Nobel Prize
For surface chemistry and Langmuir isotherm
14. Early History of Catalysis
• 1936 Modern era in catalysis
– Catalytic cracking of petroleum (acid treated clays
as catalyst)
– BET surface area
– Deuterium discovery isotope research
• 1963 Ziegler (German) &
Natta(Italian)received Nobel Prize for
stereoregulated polymerization catalyst
15. Early History of Catalysis
The Nobel Prize in Chemistry 1963 was awarded jointly to
Karl Ziegler and Giulio Natta "for their discoveries in the
field of the chemistry and technology of high polymers."
16. History of Catalysis
WORK: Often, chemical reactions are speeded up by surfaces, as in the case when
gaseous molecules come in contact with a metal surface. During the 1960s Gerhard
Ertl developed a number of methods for studying surface chemical reactions. Among
other things, he made use of techniques for producing a very pure vacuum, which
had been developed within the semiconductor industry. Gerhard Ertl was able to map
out details of a process of great importance in the production of artificial fertilizer:
the Haber-Bosch process in which nitrogen in the air is converted to ammonia via an
iron catalyst.
21. Characteristic of Catalytic Reactions
The following features or characteristics are common to most of the catalysts.
1) A catalyst remains unchanged in mass and chemical composition at the
end of the reaction.
• A small quantity of catalyst is generally needed to produce almost
unlimited reaction. For example, one ten-millionth of its mass of finely
divided platinum is all that is needed to catalyze the decomposition of
hydrogen peroxide.
On the other hand, there are catalysts which need to be present in
relatively large amount to be effective. Thus in Friedel-Crafts reaction,
anhydrous aluminium chloride functions as a catalyst effectively when
present to the extent of 30 per cent of the mass of benzene.
22. • 3) A catalyst is more effective when finely divided. In heterogeneous
catalysis, the solid catalyst is more effective when in a state of fine
subdivision than it is used in bulk.
• (4) A catalyst is specific in its action: While a particular catalyst works for
one reaction, it will not necessarily work for another reaction. Different
catalysts, moreover, can bring about completely different reactions for the
same substance. For example, ethanol (C2H5OH) gives ethene (C2H4) when
passed over hot aluminium oxide, but with hot copper it gives ethanal
(CH3CHO).
Characteristic of Catalytic Reactions
23. Characteristic of Catalytic Reactions
• (5) A catalyst cannot, in general, initiate a reaction: In most cases a
catalyst speeds up a reaction already in progress and does not initiate (or
start) the reaction. But there are certain reactions where the reactants do
not combine for very long period(perhaps years).
For example, a mixture of hydrogen and oxygen, which remains
unchanged almost in definitely at room temperature, can be brought to
reaction by the catalyst platinum black in a few seconds.
Thus it is now considered that the catalyst can initiate a reaction.
According to this view, the reacting molecules (in the absence of catalyst)
do not possess minimum kinetic energies for successful collisions. The
molecules rebound from collision without reacting at all.
24. Characteristic of Catalytic Reactions
• (6) A catalyst does not affect the final position of equilibrium, although it
shortens the time required to establish the equilibrium. It implies that in
a reversible reaction the catalyst accelerates the forward and the reverse
reactions equally. Thus the ratio of the rates of two opposing reactions i.e.,
the equilibrium constant, remains unchanged.
25. Characteristic of Catalytic Reactions
• (7) Change of temperature alters the rate of a catalytic reaction as it
would do for the same reaction without a catalyst.
Some catalysts are, however, physically altered by a rise in
temperature and hence their catalytic activity may be decreased. This is
particularly true with colloidal solutions like that of platinum, since a rise
in the temperature may cause their coagulation. In such a case the rate of
reaction increases up to a certain point and then gradually decreases. The
rate of reaction is maximum at a particular temperature called the
optimum temperature.
26. Types of Catalysis
• The numerous catalysts known today can be classified according to various
criteria: structure, composition, area of application, or state of
aggregation.
27. Classification of Catalysts
Main two classes:
1. Homogeneous catalysis
2. Heterogeneous Catalysis
• Also, there is a third types of catalysis known
as Enzyme catalysis which is largely of
biological interest.
28. Homogeneous Catalysis
• In homogeneous catalysis, the catalyst is in the same phase as the
reactants and is evenly distributed throughout. This type of catalysis can
occur in gas phase or the liquid (solution) phase.
Examples of Homogeneous Catalysis in Gas Phase:
30. Heterogeneous Catalysis
• The catalysis in which the catalyst is in a different physical
phase from the reactants is termed Heterogeneous catalysis.
• The most important of such reactions are those in which the
reactants are in the gas phase while the catalyst is a solid. The
process is also called Contact catalysis since the reaction
occurs by contact of reactants with the catalyst surface.
• In contact catalysis, usually the catalyst is a finely divided
metal or a gauze. This form of catalysis has great industrial
importance.
33. Application of Catalysis
• Four major sectors of the world economy; petroleum and energy
production, chemicals and polymer production, food industry and
pollution control, involve catalytic processes.
34. Application of Catalysis
• Catalysts are used to produce fuels such as gasoline, diesel, heating oil,
fuel oil etc.
• Production of plastics, synthetic rubbers, fabrics, cosmetics etc. involve
catalytic processes.
• Automobile emission catalysts are used to reduce emissions of CO, NOx
and hydrocarbons from mobile vehicles.
• The pharmaceutical industry uses catalysts for production of drugs that
are used to save lives and improve the health of people. Catalysts are also
widely used in food processing.
• More than 90 % of industrial processes actually use catalysts in one form
or the other.