Sichuan Techairs Co., Ltd. (formerly known as “Yalian Technology”) operates as a high-tech enterprise specialized in R&D and engineering transformation of gas production, separation and purification technologies. The Company’s technology scope mainly covers temperature swing adsorption, pressure swing adsorption, wet process, shallow cooling, copious cooling, rectification and other gas separation.
The Company engages in technology R&D, specialty design, project general contracting, production and after-sales service of special materials, and provides a complete range of technical supports and engineering services for clients in such industries as petroleum, natural gas, coal chemical, fine chemical engineering, biochemical engineering, industrial gas and ferrous metallurgy.
Hydrogen from methanol
A mixture of methanol and desalted water after heating vaporization and overheating enters into a reforming reactor. Methanol and water vapor, under the action of catalyst, complete methanol decomposition, and carbon monoxide-carbon dioxide shift reaction in the reforming reactor.
Methanol decomposition: CH3OH → CO + 2H2-90.7 KJ/mol
CO shift: CO + H2O → CO2 + H2 +41.2 KJ/mol
Overall reaction: CH3OH + H2O → CO2 + 3H2 -49.5 KJ/mol
The overall reaction is endothermic. The reaction products are separated through heat transfer, cooling, condensation and washing. The conversion per pass of methanol reaches 95% or more. Unreacted raw materials (such as methanol, desalinated water) are recycled. The reforming gas after washing is separated (hydrogen purification) through pressure swing adsorption.
Hydrogen from coal
Hydrogen production from coal is also known as hydrogen (H2) production from coal gasification, including coal gas from coal steam, desulfurization process, gas conversion, purification of hydrogen through pressure swing adsorption (PSA), gasification recycling water. Coal or coke reacts with water vapor at high temperature to produce gas mainly containing hydrogen (H2), carbon monoxide (CO) and carbon dioxide (CO2). The gas is then mixed with water vapor after cooling, dust removal and desulfurization, and sets off a shift reaction. Most carbon monoxide is converted into hydrogen (H2) and carbon dioxide (CO2), and then shift gas. The shift gas is purified into hydrogen gas (H2 with a high purity through a pressure swing adsorption (PSA).
Hydrogen from natural gas
Raw material natural gas is compressed (gas pressure for raw material is lower than 1.6Mpa), mixed with water vapor after refining desulfurization, and converted and reacted by overheating under the action of catalyst, to produce a fluidizing gas whose hydrogen content is larger than 70% (v/v%). The reforming gas is separated and purified through PSA unit to obtain the product of hydrogen.
Under the action of 800℃high temperature, a certain pressure and catalysts, alkane and water vapor contained in natural gas set off a chemical reaction to produce a reforming gas containing H2, CO, CO2, N2 and CH4. The reforming gas enters into the shift converter through the waste heat transfer, and CO is converted into H2 and CO2. CO2 is recycled through heat transfer, condensation, steam-water separation, automatic program control, and the gas passes adsorbent loaded with a plurality of specific adsorbents in turn, and the product of hydrogen is extracted after PSA adsorbing N2, CO, CH4 and CO2 through raising pressure. Impurities are released through depressurization and adsorbents are reactivated.
Hydrogen from biogas
Biogas at a lower pressure is concentrated after desulfurization and pressure swing adsorption, and the product methane is compressed, desulfurized and mixed with water vapor, and then converted and reacted by overheating under the action of catalyst, to obtain the fluidizing gas whose hydrogen content is larger than 70% (v/v%). The fluidizing gas is separated and purified by PSA unit to obtain product hydrogen.
CO2 preparation
Varieties of source gases rich in CO2 are pressed and purified after pressure swing adsorption and concentration to obtain food grade liquid dioxide after condensation, flashing and purification process. The high-purity food-grade carbon dioxide up to standards is filled into tank and bottle.
Source: Sichuan Techairs
The 10 largest coal producers and exporters in Indonesia:
- Bumi Resouces (BUMI)
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- Indo Tambangraya Megah (ITMG)
- Bukit Asam (PTBA)
- Baramulti Sukses Sarana (BSSR)
- Harum Energy (HRUM)
- Mitrabara Adiperdana (MBAP)
- Samindo Resources (MYOH)
- United Tractors (UNTR)
- Berau Coal
