Why Become a Chemcal Engineer??!!!

 1. What is chemical engineering?

Chemical engineering is all about change - chemical and biochemical engineers create and develop processes to make useful products from raw materials, in a cost effective and safe manner.

2. What does the work involve?

Chemical engineers are trained to apply fundamental engineering principles, maximise economic returns and reduce environmental impact. Chemical engineers need to work as part of a team and develop good communication skills. Strong problem solving and analytical skills are also a bonus.

World’s Best Chemical Engineering Universities

USA and Canada

1. Massachusetts Institute of Technology
   MIT is located in Boston, USA. MIT graduates and faculty are noted for their technical acumen (72 affiliated Nobel Laureates, 47 National Medal of Science recipients, and 29 MacArthur Fellows) and entrepreneurial spirit. The Department of Chemical Engineering at MIT have the largest chemical engineering faculty in the United States covering chemical engineering broadly, and in great depth. You may find further information about Che MIT here. For undergraduates, they have B.Sc degree in Chemical Engineering dan Chemical-Biological Engineering. For graduate school, they have M.S. CEP degree (Master of Science in Chemical Engineering Practice), Ph.D. CEP, and also Ph.D.
2. University of California – Berkeley
   UC Berkeley is located in Berkeley, a city on the east shore of San Francisco Bay in Northern California, in the United States. By the 1930s, Berkeley had established itself as a premier research university, and today counts sixty-one Nobel Laureates among its faculty, researchers and alumni.The College of Chemistry offers undergraduate degrees in chemistry, chemical biology, and chemical engineering, as well as double majors in chemical engineering and materials science and engineering, and in chemical engineering and nuclear engineering. A new option is a concentration in materials chemistry. The college offers doctoral programs in chemistry and chemical engineering, and a master’s program in chemical engineering, including a concentration in product development. You may find further information about chemical engineering at UC Berkeley here.
3. University of Toronto
   The University of Toronto (U of T) is a public research university in the city of Toronto, Ontario, Canada. The university is consistently placed among the leading academic institutions of the world. Newsweek magazine places the university first in Canada, and 18th worldwide, 9th among public universities, and among the top 5 universities outside the United States. The University is also affiliated with 9 Nobel laureates (6 alumni), the most of any Canadian university. Chemical Engineering and Applied Chemistry at the University of Toronto is one of the oldest and largest departments of its kind in North America. It has a rich history dating back to John Dalton of Dalton’s Atomic Theory and a modern reputation based on its state-of-the-art research achievements. You may find more information about chemical engineering at University of Toronto here

Polietilen

Ada berbagai macam polietilen berdasarkan beda massa jenis dan banyaknya cabang. Berbagai macam polietilen yaitu:

1.      Ultra high molecular weight polyethylene (UHMWPE)

2.      Ultra low molecular weight polyethylene (ULMWPE or PE-WAX)

3.      High molecular weight polyethylene (HMWPE)

4.      High density polyethylene (HDPE)

5.      High density cross-linked polyethylene (HDXLPE)

6.      Cross-linked polyethylene (PEX or XLPE)

7.      Medium density polyethylene (MDPE)

8.      Linear low density polyethylene (LLDPE)

9.      Low density polyethylene (LDPE)

10.  Very low density polyethylene (VLDPE)

Polietilen yang terpenting adalah HDPE, LDPE, dan LLDPE.

Etilena/Etena

·         Struktur Molekul

Etena atau etilen adalah senyawa alkena paling sederhana yang terdiri dari empat atom hidrogen dan dua atom karbon yang terhubungkan oleh suatu ikatan rangkap. Karena ikatan rangkap ini, etena disebut pula hidrokarbon tak jenuh atau olefin. Etena memiliki rumus kimia C₂H₄.

Pada suhu kamar, molekul etena tidak dapat berputar pada ikatan rangkapnya sehingga semua atom pembentuknya berada pada bidang yang sama. Sudut yang dibentuk oleh dua ikatan karbon-hidrogen pada molekul adalah 121,3°, sangat dekat dengan sudut 120° yang diperkirakan berdasarkan hibridisasi ideal sp2.

Berikut disajikan data sifat fisis dan kimia etena.

Tabel 1.Sifat Fisis dan Kimia Etena

No	Sifat-Sifat	Keterangan
1.	Rumus molekul	C2H4
2.	Berat molekul	28,05 g/mol
3.	Kenampakan	Gas tidak berwarna
4.	Klasifikasi (oleh Uni Eropa)	Sangat mudah terbakar
5.	NFPA 704
6.	Massa jenis	1,178 kg/m3 di 15 °C, fase gas
7.	Titik lebur	-169,2 °C (104,0 K, -272,6 °F)
8.	Titik didih	-103,7 °C (169,5 K, -154,7 °F)
9.	Flash point	-136 °C
10.	Auto ignition temperature	542,8 °C
11.	Kelarutan di air	3,5 mg/100 ml (17 °C)
12.	Kelarutan di etanol	4,22 mg/L
13.	Kelarutan di dietil eter	bagus
14.	Keasaman (pKa)	4

Etilen/etena adalah senyawa organik yang paling banyak dihasilkan di dunia. Setiap tahunnya, produksi etilen di seluruh dunia melebihi 100 miliar ton. Etena digunakan terutama sebagai senyawa antara pada produksi senyawa kimia lain seperti plastik. Etena juga dibentuk secara alami oleh tumbuhan dan berperan sebagai hormon. Ia diketahui terutama merangsang pematangan buah dan pembukaan kuncup bunga. Berikut adalah 4 produk petrokimia penting yang berasal dari etilen:

Keterangan (dari kiri atas, berputar searah jarum jam):

1.      Etilenàetilen dikloridaàvinil klorida

2.      Etilenàetilen oksidaàetilen glikol

3.      Etilenàetil benzeneàstiren

4.      Etilenàberbagai macam polietilen

Gambar 4. Empat Produk Kimia Penting yang Berasal Dari Etilen

·         Reaksi-reaksi utama pada etilen dan produk petrokimia yang berasal dari etilen.

1.      Polimerisasi

Polimerisasi terjadi dengan katalis  yang membentuk coordination complex. Katalis yang digunakan : Ziegler-Natta  à reaksi antara a-TiCl₃ dengan trietilalumunium menghasilkan lima coordinate titanium (III) complex yang tersusun oktahedral_.

Reaksi pembentukan polietilen:

Mekanisme polimerisasi (ethylene):

Chemical Engineer Jobs Description

Chemical engineers work in the production of chemicals and many other products that require chemical processing. They use the theories and laws of chemistry to develop industrial chemical processes. They generally build on the findings of research chemists, who work with small amounts of materials in laboratories. Chemical engineers are concerned with the design, construction, operation, and marketing of equipment that can reproduce on a large scale the processes or products developed by chemists. Chemical engineers work with industrial chemical processes to help produce a large variety of goods. They are often assisted by chemical technicians.

What Is Chemical Engineering? What Do Chemical Engineers Do?

What Is Chemical Engineering?

Chemical engineering basically is applied chemistry. It is the branch of engineering concerned with the design, construction, and operation of machines and plants that perform chemical reactions to solve practical problems or make useful products.

Like all engineers, chemical engineers use math, physics, and economics to solve technical problems. The difference between chemical engineers and other types of engineers is that they apply a knowledge of chemistry in addition to other engineering disciplines. Chemical engineers sometimes are called 'universal engineers' because their scientific and technical mastery is so broad.

What Do Chemical Engineers Do?

Some chemical engineers make designs and invent new processes. Some construct instruments and facilities. Some plan and operate facilities. Chemical engineers have helped develop atomic science, polymers, paper, dyes, drugs, plastics, fertilizers, foods, petrochemicals... pretty much everything. They devise ways to make products from raw materials and ways to convert one material into another useful form. Chemical engineers can make processes more cost effective or more environmentally friendly or more efficient. As you can see, a chemical engineer can find a niche in any scientific or engineering field.

SUMBER:

http://chemistry.about.com/od/chemistrystudentfaqs/f/chemeng.htm

Biochar Stove (ANILA STOVE and LUSIA STOVE)

ANILA STOVE