Purificationsolutions For the Gas Processing industry Johnson Matthey Inspiring science, enhancing life

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We deliver so you can deliver With 40+ years of experience, technical expertise and understanding of the science, Johnson Matthey stand by our performance guarantees Johnson Matthey’s PURASPEC™ absorbents are the industry choice for longest bed life and toughest duties. PURASPEC technology utilises metal oxides specially engineered into robust granules to remove traces of contaminants from hydrocarbon gases and liquids. In particular, the absorbents are designed to remove mercury and a range of sulphur compounds – most frequently hydrogen sulphide (H₂S) and carbonyl sulphide (COS). They are widely...

PURASPEC H2S removal technology is ideally suited for polishing and it is targeted at applications where the required sulphur removal capacity is no greater than 950kg/day H2S. It can also be used in conjunction with other bulk sulphur removal technologies, allowing installation of the most cost-effective solution. Applications include: • Carbon dioxide • Tank vapours • Amine off-gas PURASPEC H2S removal processes operate effectively in the temperature range of 0-200°C (32-400°F), pressures from atmospheric up to 120bar (1750psi) and flow rates exceeding 2.0million Nm3/hr (1.8Bscfd).

Figure 1: Typical lead-lag process flow diagram How it works PURASPEC absorbents are the market leading product for H₂S removal from hydrocarbon streams. It is a well-proven and robust product for complete removal of H₂S via an irreversible chemical reaction. Once the H₂S has reacted with the metal oxide present in the absorbent, it is permanently bound into the material and will not be released back into the environment even when the absorbent is fully saturated. Vessels can be single, parallel, lead-lag or in a series configuration. A typical lead-lag process flow diagram is shown in Figure...

PURASPEC Mercury removal PURASPEC mercury removal technology is specially designed for a range of hydrocarbon steams. Typically, mercury in natural gas and natural gas liquids will be present in elemental form. The concentration of mercury in natural gas varies widely depending on the geographical location and on the geology of the well formation. Mercury levels can range from < 0.01 pg/Nm3 to >5000pg/Nm3. PURASPEC mercury absorbents operate effectively in the temperature range of 0°C - 95°C (32°F - 200°F), pressures from atmospheric up to 200bar (2900psi) and flow rates exceeding 2.0million...

Figure 2: Possible locations of mercury removal unit (MRU) in a typical process flow sheet PURASPEC absorbents are the market leading solution for mercury removal. Our granules, containing an active mixed metal sulphide, are engineered to provide effective and irreversible removal of mercury from hydrocarbon gases and liquid to meet customer feedstock requirements. Mercury will not be released back into the environment even when the absorbent is fully saturated. The absorbent is typically offered in its active (pre-sulphided) form so it removes mercury as soon as hydrocarbon flow is passed over...

Collaborate with confidence to drive process optimisation with JM trusted technical experts Reactor design Fixed bed removal reactors have typically been axial flow designs. They are simple, low cost and wellproven technology. Axial beds can be constrained when designing for large flow rates, resulting in high bed pressure drops. Increasing vessel diameters can usually reduce bed pressure drop but other issues arise: • Vessel fabrication limits • Larger diameter vessels require thicker walls adding weight to the vessel Figure 3: Typical radial bed • Escalation of transportation and fabrication...

Reactor modelling Computational fluid dynamics (CFD) plays an important role in the design of purification systems, from details of the vessel such as inlet distributors and outlet collectors through to optimisation of the catalyst bed and support materials. With the help of CFD Johnson Matthey has been able to work with and help customers diagnose and eliminate problems in existing systems. Typical CFD applications include distributor redesign to reduce gas velocities at the bed surface and minimise the risk of catalyst movement, and pressure drop and flow distribution studies to eliminate bypassing...

PURACARE service is guaranteed peace of mind We support our customers to lower EHS risks, lessen workload and maximise value through long‑term thinking and channeling what really matters There is no such thing as a standard PURASPEC process. The choice of absorbent, catalyst and the design of the reactor vessel will vary according to the type of feedstock, the level of contaminants, pressure and temperature conditions, and purity specification. Our experienced engineers will ensure optimum design tailored to the customer’s conditions and targets. They will select from the family of PURASPEC processes...

JM's cradle-to-grave service looks beyond the operational life cycle of the absorbent through regionalised support and our experienced personnel PURACARE tailored service is designed to take care of all aspects of operation, maintenance and absorbent/ catalyst recycling for our global customers in the Gas Processing industry. Under the expert direction of the Johnson Matthey team, this hands-on service enables customers to save time and manpower, and also to comply with all current and anticipated environmental legislation. We will provide specialist consultancy to ensure that change-out considerations...