1.Technologies and Plants for H2 Purifying by Pressure Swing Adsorption (PSA)
Capacity: 50~30×104 Nm3/h
Applicable raw materials: different kinds of gases that contain hydrogen, including shift gas from natural gas reformation, methanol cracking gas, refinery by-product (L.P. Sep. gas from hydro-treating plants), catalytic dry gas, reforming hydrogen gas, coal gasification syngas, methanol exhausted gas, synthetic ammonia tail gas, coke oven gas, raw coke oven gas, chlor-alkali tail gas, etc.
Technical characteristics:
Advanced and reliable technology.
Applicable for variety of feedstock,
and has a high hydrogen purity at over 99.999%.
High recovery of hydrogen, normally the recovery of hydrogen can be reached 80-99% depending on different gas sources and product conditions.
Wide working pressure range: 0.2-6.0 MPa(G), low energy consumption, operating flexibility is 20-120%,
High automation level of plants with DCS automatic control, automatic regulating and self-diagnostic and auto-column-shifting function, short start-up or shut-down time, and on-line fault treatment.
Adsorbent: large adsorption capacity, high strength performance, long operating time.
Program-control valve: high performance with low failure rate and long operating time.
Case accomplishment: over 300 units have been put into operation.
Typical cases:
Sinopec Shanghai Petrochemical Co., Ltd., 80000 Nm3/h hydrogen plant with shift gas PSA purifying unit
Sinopec Shijiazhuang Refining and Chemical Branch, 80000 Nm3/h reforming hydrogen PSA purifying plant
Henan First Chemical Co., Ltd., 30000 Nm3/h coke oven gas PSA hydrogen purifying plant (domestically largest)
Shandong Hualuhengsheng Chemical Co., Ltd., 120000 Nm3/h POX coal gasification syngas PSA hydrogen purifying plant (high-pressure PSA)
Shandong Shouguang Luqing Petrochemical Co., Ltd., 60000 Nm3/h methanol cracking gas PSA hydrogen purifying plant
Shandong Lihuayi Co., Ltd., 100000 Nm3/h POX coal gasification syngas PSA hydrogen purifying plant (high-pressure PSA)
Shanxi Shenmutianyuan Chemical Co., Ltd., 90000 Nm3/h raw coke oven gas PSA hydrogen purifying plant (shift unit included)
2.Technologies and plants for producing H2 by steam reforming of light hydrocarbon (natural gas / dry gas)
Capacity: 50~20×104 Nm3/h
Raw materials: Natural gas, light naphtha, LPG, propane, raffinate, reforming topped oil, FCC dry gas, hydro-treating unit dry gas, coker off-gas, and other kinds of material that contain C1-C5 light hydrocarbon component.
Technical characteristics:
Steam reforming of light hydrocarbon and PSA purification process can obtain high purity hydrogen and high conversion rate of raw material.
The process is simple and convenient for start-up and shut-down.
Reformer type: box type (applicable for large scale); cylinder type (applicable for small scale); container type Skid-mounted reformer (applicable for extra-small scale).
Case accomplishment: About 150 units have been put into operation or under construction, with a capacity range from 50 Nm3/h (skid-mounted type) to 80000 Nm3/h, having the most accomplished cases among competitors.
Typical cases:
Shandong Fangyu Lube Oil Co., Ltd., 50000Nm3/h dry gas reforming hydrogen plant Sinopec
Shijiazhuang Refining and Chemical Company, 15000Nm3/h natural gas reforming hydrogen plant
Shandong Huifeng Petrochemical Company, 30000Nm3/h dry gas reforming hydrogen plant CNPC
Liaohe Ptrochemical Company, 17000Nm3/h natural gas reforming hydrogen plant Taiwan Shin Zu Shing Co., Ltd., 50Nm3/h natural gas reforming hydrogen plant
3、Dedicated adsorbents for Pressure Swing Adsorption (PSA)
The property of the adsorbent directly influences the purity of product and the recovery rate and is the assurance for the process long-time operation continuously and steadily. So it is the key technology for PSA gas purification.
Characteristics：
（1）Great dynamic absorption capacity, high separation factor, and easy desorption.
（2）Complete in variety for different feed composition and product quality.
（3）Greater abrasion strength and compressive strength and chemical inertness to all the separation gas.
（4）With the advanced non-binder and multi-calcinations manufacturing techniques, the adsorbent is much better than the same kind of imported adsorbent in the performance indicators such as bulk density and is among the world leading level in this field.
