Bath house section, Cleveland Point House, Cleveland

Section taken through new bath house.

Beachfront elevation, Cleveland Point House, Cleveland

New bath house (centre), with existing buildings to either side.

Beachfront elevation, Cleveland Point House, Cleveland

Timber framing to new bath house (centre), with existing buildings to either side.

Bath house, Cleveland Point House, Cleveland

Timber framing to new bath house, as seen from beachfront.

Beachfront elevation, Cleveland Point House, Cleveland

Timber framing to new bath house (centre), with existing buildings to either side.

Bath house, Cleveland Point House, Cleveland

Timber framing to new bath house, as seen looking towards water from deck area (to be constructed).

Beachfront elevation, Cleveland Point House, Cleveland

Timber framing to new bath house (centre), with existing buildings to either side.

Bath house, Cleveland Point House, Cleveland

As seen looking towards water from deck area.

Beachfront elevation, Cleveland Point House, Cleveland

New bath house (centre), with existing buildings to either side during sunset.

Beachfront elevation, Cleveland Point House, Cleveland

New bath house (centre), with existing buildings to either side.

Beachfront elevation, Cleveland Point House, Cleveland

Existing boat house undergoing renovations.

Boat house, Cleveland Point House, Cleveland

Existing boat house undergoing renovation. Existing cottage on left. Bath house to be constructed.

Bath house, Cleveland Point House, Cleveland

New bath house (centre), with existing buildings to either side.

Ground floor plan, Cleveland Point House, Cleveland

Hand-drawn floor plan.

Thermal Cycling Stability of Silica Membranes for Gas Separation

Hydrogen is being seen as an alternative energy carrier to conventional hydrocarbons to reduce greenhouse gas emissions. High efficiency separation technologies to remove hydrogen from the greenhouse gas, carbon dioxide, are therefore in growing demand. Traditional thermodynamic separation systems utilise distillation, absorption and adsorption, but are limited in efficiency at compact scales. Molecular sieve silica (MSS) membranes can perform this separation as they have high permselectivity of hydrogen to carbon dioxide, but their stability under thermal cycling is not well reported. In this work we exposed a standard MSS membrane and a carbonised template MSS (CTMSS) membrane to thermal cycling from 100 to 450°C. The standard MSS and carbonised template CTMSS membranes both showed permselectivity of helium to nitrogen dropping from around 10 to 6 in the first set of cycles, remaining stable until the last test. The permselectivity drop was due to small micropore collapse, which occurred via structure movement during cycling. Simulating single stage membrane separation with a 50:50 molar feed of H2:CO2, H2 exiting the permeate stream would start at 79% and stabilise at 67%. Higher selectivity membranes showed less of a purity drop, indicating the margin at which to design a stable membrane separation unit for CO2 capture.