NOVELTY - A process (M1) for forming a Fischer-Tropsch product comprising at least one higher molecular weight hydrocarbons involves: flowing an steam methane reforming (SMR) feed of methane and steam in an SMR microchannel reactor of several SMR process microchannel (100) and several combustion channels in contact with SMR catalysts to form a first intermediate product of carbon monoxide and hydrogen; and flowing the second intermediate product in a Fischer-Tropsch microchannel reactor in contact with Fischer-Tropsch catalyst.    USE - For forming a Fischer-Tropsch product comprising at least one higher molecular weight hydrocarbons (claimed); for converting natural gas to higher molecular weight hydrocarbon.    ADVANTAGE - The process forms Fischer-Tropsch product comprising at least one higher molecular weight hydrocarbons; converts natural gas to higher molecular weight hydrocarbon; avoid production of high levels of emissions, the requirement for high levels of water consumption, the production of large amounts of waste water, and process inefficiencies. The process is conducted with relatively low levels of emissions such as NOx, CO and CO2 being produced; avoids fresh water feed for the process which is eliminated or reduced to very low levels; provides relatively high carbon efficiency; provides part of the H2 which is separated from the first intermediate product or synthesis gas product produced in the SMR microchannel reactor and recycled back to the combustion channels in the SMR microchannel reactor as an H2 rich fuel; provides a relatively high level of carbon utilization; avoid higher production costs as well as provide a relatively safe operation by using process streams that employ the use of air as a source for oxygen, as compared to prior art process that use pure oxygen or oxygen enriched air; export electricity out of the process for other uses; excess H2 separated from the first intermediate product which is used and/or purified, as required, to supply H2 needs for product upgrading, such as hydrotreating or hydrocracking, or for feedstock purification, such as hydrodesulfurization. By creating an H2 rich fuel with little or no carbon-containing ingredients, the water from the combustion exhaust is captured economically as water feed for the process thereby eliminating or reducing dramatically the need for fresh water feed. By using the H2 rich fuel, the process is with reduced levels of CO and CO2 emissions.    DETAILED DESCRIPTION - A process (M1) for forming a Fischer-Tropsch product comprising at least one higher molecular weight hydrocarbons involves: flowing steam methane reforming (SMR) SMR feed comprising methane and steam in an SMR microchannel reactor comprising several SMR process microchannel (100) and several combustion channels in contact with at least one SMR catalysts to form a first intermediate product comprising carbon monoxide (CO) and hydrogen (H2); and flowing the second intermediate product in a Fischer-Tropsch microchannel reactor in contact with at least one Fischer-Tropsch catalysts to form a Fischer-Tropsch product comprising at least one higher molecular weight hydrocarbons. The SMR process microchannels containing the SMR catalyst, the methane and steam contacts the SMR catalyst in the process microchannels; separates part of the H2 from the first intermediate product to form a second intermediate product (where the second intermediate product comprises CO and H2); and transfers heat from the combustion channels to the SMR process microchannels. The combustion channels containing at least one combustion catalyst. The separated H2 is combined with oxygen or a source of oxygen to form a combustion reaction mixture. The combustion reaction mixture contacts the combustion catalyst, undergoing a combustion reaction, and generates heat and a combustion exhaust. The Fischer-Tropsch microchannel reactor comprises several of Fischer-Tropsch process microchannels and several heat exchange channels. The Fischer-Tropsch process microchannels containing the Fischer- Tropsch catalysts, the second intermediate product contacts the Fischer-Tropsch catalysts in the Fischer-Tropsch process microchannels; and transfers heat from the Fischer-Tropsch process microchannels to a heat exchange fluid in the heat exchange channels. INDEPENDNENT CLAIMS are included for the following:    (1) an apparatus (A1) comprising: several SMR microchannel reactors positioned in an SMR vessel. The SMR microchannel reactor comprises a several SMR process microchannels, several combustion channels and a several staged addition channels. The combustion channel is adjacent to at least one staged addition channel. The SMR vessel is equipped with a manifold for flowing an SMR feed to the SMR process microchannels, a manifold for flowing an SMR product from the SMR process microchannels, a manifold for flowing a fuel to the combustion channels, a manifold for flowing oxygen or a source of oxygen to the staged addition channels, and a manifold for flowing combustion exhaust from the combustion channels;    (2) an apparatus (A2) comprising several Fischer-Tropsch microchannel reactors positioned in a Fischer-Tropsch vessel. The Fischer-Tropsch microchannel reactor comprises several Fischer-Tropsch process microchannels and several heat exchange channels. The Fischer-Tropsch is equipped with a manifold for flowing a Fischer-Tropsch feed to the Fischer-Tropsch process microchannels, a manifold for flowing a Fischer-Tropsch product from the Fischer-Tropsch process microchannels, a manifold for flowing a heat exchange fluid to the heat exchange channels, and a manifold for flowing the heat exchange fluid from the heat exchange channels; and    (3) a composition comprising a mixture of olefins and 5-100C paraffins (where the molar ratio of olefins to paraffins is 0.01-0.8).    DESCRIPTION OF DRAWING(S) - The figure shows a schematic illustration of a microchannel.    microchannel (100)    arrows. (102,104)