iGCSE: Contact Process to manufacture Sulphuric acid
- Basics of industrial manufacture of chemicals
The contact process is the current method of producing sulfuric acid in the high concentrations needed for industrial processes. Platinum was initially used as the catalyst for this reaction; however, as it is susceptible to reacting with arsenic impurities in the sulfur feedstock, vanadium(V) oxide (V2O5) is now preferred.
The process can be divided into five stages:
Combining of sulfur and oxygen (O2) to form sulfur dioxide
Purifying the sulfur dioxide in a purification unit
Adding an excess of oxygen to sulfur dioxide in the presence of the catalyst vanadium pentoxide at 450 °C and 1-2 atm
The sulfur trioxide formed is added to sulfuric acid which gives rise to oleum (disulfuric acid)
The oleum is then added to water to form sulfuric acid which is very concentrated.
As this process is an exothermic reaction so the temperature should be as low as possible. The yield has been found to be maximum at about 410 - 450° C.
Who this course is for:
- Science students
- 00:06Welcome to the course!
- 00:00Pre-read material
- 07:01Instructor led session #1
- 06:59Instructor led session #2
- 09:18Instructor led session #3
- 07:40Instructor led session #4
- 12:46Instructor led session #5
- 03:04Instructor led session #6
- 00:00Revision: Step 1
- 00:00Revision: Step 2
- 00:00Revision: Step 3
Senior Chemistry Professor | Department of Science
30+ years of teaching experience across national and international education boards
Currently a senior Chemistry professor at DPS International
Participated in IGCSE workshops, seminars and teacher training programs conducted by CIE, UK
Post Graduate in Chemistry with specialization in Organic Chemistry
Rashmi is known for mentoring students to pursue higher studies in the US and UK. She has a broad exposure to international and national curriculums and has taken her students on field trips to NASA, Harvard Business School and others. Rashmi holds the additional responsibility of leading inter school competitions in Delhi, India and manages NIE effort.